./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN --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 9948dbd77aeb2de72e0bd3a3a4e22b1606b19383e4631af58adbec46ed909b6c --- 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-6b4ec56 [2022-11-20 12:48:41,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:48:41,020 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:48:41,061 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:48:41,061 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:48:41,066 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:48:41,067 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:48:41,073 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:48:41,076 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:48:41,078 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:48:41,080 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:48:41,084 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:48:41,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:48:41,092 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:48:41,094 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:48:41,097 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:48:41,099 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:48:41,102 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:48:41,104 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:48:41,111 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:48:41,116 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:48:41,117 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:48:41,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:48:41,122 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:48:41,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:48:41,130 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:48:41,130 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:48:41,131 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:48:41,133 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:48:41,134 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:48:41,137 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:48:41,138 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:48:41,140 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:48:41,141 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:48:41,143 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:48:41,144 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:48:41,144 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:48:41,145 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:48:41,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:48:41,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:48:41,149 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:48:41,150 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/config/svcomp-Termination-64bit-Automizer_Default.epf [2022-11-20 12:48:41,188 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:48:41,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:48:41,200 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:48:41,200 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:48:41,202 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:48:41,202 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:48:41,202 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:48:41,203 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-11-20 12:48:41,203 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-11-20 12:48:41,203 INFO L138 SettingsManager]: * Use old map elimination=false [2022-11-20 12:48:41,205 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-11-20 12:48:41,205 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-11-20 12:48:41,205 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-11-20 12:48:41,206 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:48:41,206 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 12:48:41,206 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 12:48:41,206 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:48:41,207 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-11-20 12:48:41,207 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-11-20 12:48:41,207 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-11-20 12:48:41,208 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 12:48:41,208 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-11-20 12:48:41,208 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:48:41,208 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-11-20 12:48:41,209 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:48:41,209 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:48:41,209 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:48:41,210 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 12:48:41,211 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-11-20 12:48:41,212 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_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9948dbd77aeb2de72e0bd3a3a4e22b1606b19383e4631af58adbec46ed909b6c [2022-11-20 12:48:41,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:48:41,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:48:41,616 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:48:41,618 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:48:41,620 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:48:41,622 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c [2022-11-20 12:48:44,863 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:48:45,184 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:48:45,185 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c [2022-11-20 12:48:45,193 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/data/9bab1fba4/0e87d6dcffb949829255c5a1e99e8de5/FLAG72345faca [2022-11-20 12:48:45,218 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/data/9bab1fba4/0e87d6dcffb949829255c5a1e99e8de5 [2022-11-20 12:48:45,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:48:45,227 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:48:45,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:48:45,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:48:45,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:48:45,239 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:48:45" (1/1) ... [2022-11-20 12:48:45,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e292c2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:48:45, skipping insertion in model container [2022-11-20 12:48:45,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:48:45" (1/1) ... [2022-11-20 12:48:45,250 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:48:45,267 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:48:45,479 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:48:45,485 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 12:48:45,499 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:48:45,511 INFO L208 MainTranslator]: Completed translation [2022-11-20 12:48:45,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:48:45 WrapperNode [2022-11-20 12:48:45,511 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:48:45,512 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 12:48:45,513 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 12:48:45,513 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 12:48:45,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:48:45" (1/1) ... [2022-11-20 12:48:45,527 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:48:45" (1/1) ... [2022-11-20 12:48:45,545 INFO L138 Inliner]: procedures = 6, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 6 [2022-11-20 12:48:45,546 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 12:48:45,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 12:48:45,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 12:48:45,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 12:48:45,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:48:45" (1/1) ... [2022-11-20 12:48:45,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:48:45" (1/1) ... [2022-11-20 12:48:45,560 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:48:45" (1/1) ... [2022-11-20 12:48:45,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:48:45" (1/1) ... [2022-11-20 12:48:45,563 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:48:45" (1/1) ... [2022-11-20 12:48:45,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:48:45" (1/1) ... [2022-11-20 12:48:45,566 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:48:45" (1/1) ... [2022-11-20 12:48:45,567 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:48:45" (1/1) ... [2022-11-20 12:48:45,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 12:48:45,571 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 12:48:45,572 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 12:48:45,572 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 12:48:45,573 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:48:45" (1/1) ... [2022-11-20 12:48:45,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:45,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:45,619 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:45,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2022-11-20 12:48:45,663 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2022-11-20 12:48:45,663 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2022-11-20 12:48:45,663 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2022-11-20 12:48:45,663 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2022-11-20 12:48:45,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 12:48:45,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 12:48:45,729 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 12:48:45,732 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 12:48:45,889 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 12:48:45,911 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 12:48:45,920 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-20 12:48:45,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:48:45 BoogieIcfgContainer [2022-11-20 12:48:45,923 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 12:48:45,924 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-11-20 12:48:45,924 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-11-20 12:48:45,929 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-11-20 12:48:45,935 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-20 12:48:45,935 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.11 12:48:45" (1/3) ... [2022-11-20 12:48:45,937 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1a1219b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 12:48:45, skipping insertion in model container [2022-11-20 12:48:45,937 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-20 12:48:45,937 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:48:45" (2/3) ... [2022-11-20 12:48:45,937 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1a1219b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 12:48:45, skipping insertion in model container [2022-11-20 12:48:45,938 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-20 12:48:45,938 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:48:45" (3/3) ... [2022-11-20 12:48:45,941 INFO L332 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1b.c [2022-11-20 12:48:46,030 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2022-11-20 12:48:46,031 INFO L304 stractBuchiCegarLoop]: Hoare is false [2022-11-20 12:48:46,031 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-11-20 12:48:46,032 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-11-20 12:48:46,032 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-11-20 12:48:46,032 INFO L308 stractBuchiCegarLoop]: Difference is false [2022-11-20 12:48:46,032 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-11-20 12:48:46,032 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2022-11-20 12:48:46,037 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 12:48:46,062 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-11-20 12:48:46,062 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-20 12:48:46,062 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-20 12:48:46,069 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-11-20 12:48:46,069 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:48:46,069 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2022-11-20 12:48:46,070 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 12:48:46,073 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-11-20 12:48:46,073 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-20 12:48:46,073 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-20 12:48:46,074 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-11-20 12:48:46,074 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:48:46,083 INFO L748 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 13#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 9#L25true call main_#t~ret6#1 := rec2(main_~x~0#1);< 16#rec2ENTRYtrue [2022-11-20 12:48:46,083 INFO L750 eck$LassoCheckResult]: Loop: 16#rec2ENTRYtrue ~j := #in~j; 17#L18true assume !(~j <= 0); 20#L20true call #t~ret3 := rec1(~j - 1);< 22#rec1ENTRYtrue ~i := #in~i; 18#L12true assume ~i <= 0;#res := 0; 14#rec1FINALtrue assume true; 15#rec1EXITtrue >#34#return; 3#L20-1true call #t~ret4 := rec2(#t~ret3);< 16#rec2ENTRYtrue [2022-11-20 12:48:46,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:48:46,090 INFO L85 PathProgramCache]: Analyzing trace with hash 48738, now seen corresponding path program 1 times [2022-11-20 12:48:46,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:48:46,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015123477] [2022-11-20 12:48:46,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:48:46,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:48:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:48:46,189 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:48:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:48:46,213 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:48:46,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:48:46,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1074209557, now seen corresponding path program 1 times [2022-11-20 12:48:46,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:48:46,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521200548] [2022-11-20 12:48:46,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:48:46,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:48:46,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:48:46,235 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:48:46,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:48:46,245 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:48:46,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:48:46,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1203131828, now seen corresponding path program 1 times [2022-11-20 12:48:46,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:48:46,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913176085] [2022-11-20 12:48:46,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:48:46,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:48:46,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:48:46,260 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:48:46,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:48:46,269 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:48:46,514 INFO L210 LassoAnalysis]: Preferences: [2022-11-20 12:48:46,515 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-20 12:48:46,515 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-20 12:48:46,515 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-20 12:48:46,515 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-20 12:48:46,515 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:46,516 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-20 12:48:46,516 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-20 12:48:46,516 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration1_Loop [2022-11-20 12:48:46,516 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-20 12:48:46,517 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-20 12:48:46,559 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:46,588 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:46,605 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:46,609 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:46,620 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:46,693 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-20 12:48:46,694 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-20 12:48:46,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:46,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:46,701 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:46,704 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-20 12:48:46,704 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-20 12:48:46,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2022-11-20 12:48:46,736 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-20 12:48:46,736 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_~j=0} Honda state: {rec2_~j=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-20 12:48:46,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:46,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:46,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:46,750 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:46,760 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-20 12:48:46,760 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-20 12:48:46,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2022-11-20 12:48:46,795 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-20 12:48:46,796 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#res=0} Honda state: {rec2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-20 12:48:46,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:46,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:46,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:46,809 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:46,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2022-11-20 12:48:46,820 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-20 12:48:46,823 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-20 12:48:46,848 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-20 12:48:46,849 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret4=0} Honda state: {rec2_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-20 12:48:46,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:46,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:46,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:46,863 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:46,874 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-20 12:48:46,874 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-20 12:48:46,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2022-11-20 12:48:46,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:46,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:46,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:46,915 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:46,925 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-20 12:48:46,925 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-20 12:48:46,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2022-11-20 12:48:46,963 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-20 12:48:46,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:46,973 INFO L210 LassoAnalysis]: Preferences: [2022-11-20 12:48:46,973 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-20 12:48:46,973 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-20 12:48:46,973 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-20 12:48:46,973 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-20 12:48:46,974 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:46,974 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-20 12:48:46,974 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-20 12:48:46,974 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration1_Loop [2022-11-20 12:48:46,974 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-20 12:48:47,001 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-20 12:48:47,002 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:47,008 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:47,011 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:47,014 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:47,024 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:47,073 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-20 12:48:47,079 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-20 12:48:47,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:47,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:47,082 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:47,087 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 [2022-11-20 12:48:47,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2022-11-20 12:48:47,101 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-20 12:48:47,102 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-20 12:48:47,102 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-20 12:48:47,103 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-20 12:48:47,103 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-20 12:48:47,107 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-20 12:48:47,107 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-20 12:48:47,117 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-20 12:48:47,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:47,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:47,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:47,129 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:47,141 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 [2022-11-20 12:48:47,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2022-11-20 12:48:47,155 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-20 12:48:47,155 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-20 12:48:47,156 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-20 12:48:47,156 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-20 12:48:47,156 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-20 12:48:47,157 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-20 12:48:47,157 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-20 12:48:47,174 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-20 12:48:47,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:47,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:47,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:47,185 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:47,194 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 [2022-11-20 12:48:47,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2022-11-20 12:48:47,208 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-20 12:48:47,208 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-20 12:48:47,208 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-20 12:48:47,208 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-20 12:48:47,208 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-20 12:48:47,210 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-20 12:48:47,210 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-20 12:48:47,243 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-20 12:48:47,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:47,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:47,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:47,253 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:47,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2022-11-20 12:48:47,257 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 [2022-11-20 12:48:47,271 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-20 12:48:47,272 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-20 12:48:47,272 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-20 12:48:47,272 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-20 12:48:47,272 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-20 12:48:47,274 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-20 12:48:47,274 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-20 12:48:47,291 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-20 12:48:47,296 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-11-20 12:48:47,297 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-11-20 12:48:47,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:47,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:47,334 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:47,341 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-20 12:48:47,341 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-20 12:48:47,341 INFO L513 LassoAnalysis]: Proved termination. [2022-11-20 12:48:47,342 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2022-11-20 12:48:47,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2022-11-20 12:48:47,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:47,355 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-20 12:48:47,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:48:47,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:48:47,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 12:48:47,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:48:47,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:48:47,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 12:48:47,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:48:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:48:47,631 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 6 loop predicates [2022-11-20 12:48:47,635 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 7 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:48:48,290 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6). Second operand has 7 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 195 states and 280 transitions. Complement of second has 61 states. [2022-11-20 12:48:48,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 1 stem states 9 non-accepting loop states 1 accepting loop states [2022-11-20 12:48:48,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:48:48,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 58 transitions. [2022-11-20 12:48:48,304 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 58 transitions. Stem has 3 letters. Loop has 8 letters. [2022-11-20 12:48:48,307 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-20 12:48:48,307 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 58 transitions. Stem has 11 letters. Loop has 8 letters. [2022-11-20 12:48:48,308 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-20 12:48:48,308 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 58 transitions. Stem has 3 letters. Loop has 16 letters. [2022-11-20 12:48:48,308 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-20 12:48:48,310 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 195 states and 280 transitions. [2022-11-20 12:48:48,329 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-11-20 12:48:48,351 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 195 states to 83 states and 121 transitions. [2022-11-20 12:48:48,352 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 36 [2022-11-20 12:48:48,353 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 39 [2022-11-20 12:48:48,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 121 transitions. [2022-11-20 12:48:48,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-20 12:48:48,359 INFO L218 hiAutomatonCegarLoop]: Abstraction has 83 states and 121 transitions. [2022-11-20 12:48:48,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states and 121 transitions. [2022-11-20 12:48:48,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2022-11-20 12:48:48,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 32 states have internal predecessors, (34), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (30), 15 states have call predecessors, (30), 16 states have call successors, (30) [2022-11-20 12:48:48,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 84 transitions. [2022-11-20 12:48:48,425 INFO L240 hiAutomatonCegarLoop]: Abstraction has 56 states and 84 transitions. [2022-11-20 12:48:48,425 INFO L428 stractBuchiCegarLoop]: Abstraction has 56 states and 84 transitions. [2022-11-20 12:48:48,425 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2022-11-20 12:48:48,426 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 56 states and 84 transitions. [2022-11-20 12:48:48,428 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-11-20 12:48:48,428 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-20 12:48:48,428 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-20 12:48:48,429 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:48:48,429 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-11-20 12:48:48,429 INFO L748 eck$LassoCheckResult]: Stem: 354#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 355#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 351#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 362#rec2ENTRY ~j := #in~j; 383#L18 assume !(~j <= 0); 357#L20 call #t~ret3 := rec1(~j - 1);< 386#rec1ENTRY ~i := #in~i; 384#L12 assume !(~i <= 0); 366#L14 call #t~ret0 := rec1(~i - 2);< 370#rec1ENTRY [2022-11-20 12:48:48,429 INFO L750 eck$LassoCheckResult]: Loop: 370#rec1ENTRY ~i := #in~i; 395#L12 assume !(~i <= 0); 369#L14 call #t~ret0 := rec1(~i - 2);< 370#rec1ENTRY [2022-11-20 12:48:48,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:48:48,430 INFO L85 PathProgramCache]: Analyzing trace with hash 838970620, now seen corresponding path program 1 times [2022-11-20 12:48:48,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:48:48,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164569868] [2022-11-20 12:48:48,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:48:48,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:48:48,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:48:48,443 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:48:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:48:48,450 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:48:48,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:48:48,451 INFO L85 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 1 times [2022-11-20 12:48:48,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:48:48,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281598336] [2022-11-20 12:48:48,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:48:48,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:48:48,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:48:48,456 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:48:48,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:48:48,460 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:48:48,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:48:48,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1359045147, now seen corresponding path program 2 times [2022-11-20 12:48:48,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:48:48,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61094398] [2022-11-20 12:48:48,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:48:48,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:48:48,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:48:48,471 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:48:48,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:48:48,487 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:48:48,531 INFO L210 LassoAnalysis]: Preferences: [2022-11-20 12:48:48,532 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-20 12:48:48,532 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-20 12:48:48,532 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-20 12:48:48,532 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-20 12:48:48,532 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:48,532 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-20 12:48:48,532 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-20 12:48:48,532 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration2_Loop [2022-11-20 12:48:48,533 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-20 12:48:48,533 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-20 12:48:48,534 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:48,536 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:48,539 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:48,542 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:48,545 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:48,547 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:48,586 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-20 12:48:48,586 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-20 12:48:48,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:48,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:48,588 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:48,592 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-20 12:48:48,592 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-20 12:48:48,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2022-11-20 12:48:48,615 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-20 12:48:48,615 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-20 12:48:48,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:48,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:48,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:48,626 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:48,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2022-11-20 12:48:48,631 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-20 12:48:48,631 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-20 12:48:48,651 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-20 12:48:48,652 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-20 12:48:48,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:48,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:48,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:48,656 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:48,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2022-11-20 12:48:48,659 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-20 12:48:48,659 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-20 12:48:48,695 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-20 12:48:48,695 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-20 12:48:48,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:48,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:48,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:48,704 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:48,721 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-20 12:48:48,721 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-20 12:48:48,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2022-11-20 12:48:48,745 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-20 12:48:48,745 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-20 12:48:48,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:48,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:48,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:48,751 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:48,755 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-20 12:48:48,755 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-20 12:48:48,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2022-11-20 12:48:48,791 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-20 12:48:48,791 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-20 12:48:48,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:48,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:48,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:48,802 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:48,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2022-11-20 12:48:48,810 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-20 12:48:48,811 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-20 12:48:48,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:48,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:48,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:48,839 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:48,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2022-11-20 12:48:48,848 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-20 12:48:48,848 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-20 12:48:48,932 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-20 12:48:48,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Ended with exit code 0 [2022-11-20 12:48:48,939 INFO L210 LassoAnalysis]: Preferences: [2022-11-20 12:48:48,940 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-20 12:48:48,940 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-20 12:48:48,940 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-20 12:48:48,940 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-20 12:48:48,940 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:48,940 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-20 12:48:48,940 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-20 12:48:48,940 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration2_Loop [2022-11-20 12:48:48,941 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-20 12:48:48,941 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-20 12:48:48,942 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:48,951 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:48,954 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:48,957 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:48,972 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:48,980 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:49,020 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-20 12:48:49,021 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-20 12:48:49,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:49,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:49,025 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:49,033 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 [2022-11-20 12:48:49,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2022-11-20 12:48:49,047 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-20 12:48:49,048 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-20 12:48:49,048 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-20 12:48:49,048 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-20 12:48:49,048 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-20 12:48:49,050 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-20 12:48:49,050 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-20 12:48:49,075 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-20 12:48:49,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:49,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:49,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:49,087 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:49,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2022-11-20 12:48:49,102 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 [2022-11-20 12:48:49,116 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-20 12:48:49,116 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-20 12:48:49,117 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-20 12:48:49,117 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-20 12:48:49,117 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-20 12:48:49,118 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-20 12:48:49,118 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-20 12:48:49,127 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-20 12:48:49,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:49,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:49,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:49,138 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:49,152 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 [2022-11-20 12:48:49,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2022-11-20 12:48:49,167 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-20 12:48:49,167 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-20 12:48:49,167 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-20 12:48:49,167 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-20 12:48:49,167 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-20 12:48:49,168 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-20 12:48:49,169 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-20 12:48:49,183 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-20 12:48:49,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:49,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:49,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:49,194 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:49,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2022-11-20 12:48:49,223 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 [2022-11-20 12:48:49,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:49,238 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-20 12:48:49,239 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-20 12:48:49,239 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-20 12:48:49,239 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-20 12:48:49,239 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-20 12:48:49,240 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-20 12:48:49,240 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-20 12:48:49,249 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-20 12:48:49,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:49,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:49,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:49,260 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:49,265 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 [2022-11-20 12:48:49,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2022-11-20 12:48:49,279 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-20 12:48:49,279 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-20 12:48:49,279 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-20 12:48:49,280 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-20 12:48:49,280 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-20 12:48:49,283 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-20 12:48:49,283 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-20 12:48:49,317 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-20 12:48:49,320 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2022-11-20 12:48:49,321 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-11-20 12:48:49,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:49,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:49,325 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:49,329 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-20 12:48:49,329 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-20 12:48:49,330 INFO L513 LassoAnalysis]: Proved termination. [2022-11-20 12:48:49,330 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2022-11-20 12:48:49,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2022-11-20 12:48:49,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:49,340 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-20 12:48:49,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:48:49,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:48:49,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 12:48:49,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:48:49,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:48:49,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 12:48:49,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:48:49,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:48:49,490 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 [2022-11-20 12:48:49,491 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 56 states and 84 transitions. cyclomatic complexity: 32 Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:48:49,555 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 56 states and 84 transitions. cyclomatic complexity: 32. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 106 states and 150 transitions. Complement of second has 13 states. [2022-11-20 12:48:49,555 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 [2022-11-20 12:48:49,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:48:49,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 18 transitions. [2022-11-20 12:48:49,557 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 18 transitions. Stem has 9 letters. Loop has 3 letters. [2022-11-20 12:48:49,557 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-20 12:48:49,557 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 18 transitions. Stem has 12 letters. Loop has 3 letters. [2022-11-20 12:48:49,558 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-20 12:48:49,558 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 18 transitions. Stem has 9 letters. Loop has 6 letters. [2022-11-20 12:48:49,558 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-20 12:48:49,558 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 106 states and 150 transitions. [2022-11-20 12:48:49,561 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-11-20 12:48:49,564 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 106 states to 94 states and 138 transitions. [2022-11-20 12:48:49,564 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 38 [2022-11-20 12:48:49,565 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 40 [2022-11-20 12:48:49,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 138 transitions. [2022-11-20 12:48:49,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-20 12:48:49,566 INFO L218 hiAutomatonCegarLoop]: Abstraction has 94 states and 138 transitions. [2022-11-20 12:48:49,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states and 138 transitions. [2022-11-20 12:48:49,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2022-11-20 12:48:49,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 58 states have internal predecessors, (62), 27 states have call successors, (27), 15 states have call predecessors, (27), 12 states have return successors, (41), 16 states have call predecessors, (41), 22 states have call successors, (41) [2022-11-20 12:48:49,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 130 transitions. [2022-11-20 12:48:49,585 INFO L240 hiAutomatonCegarLoop]: Abstraction has 90 states and 130 transitions. [2022-11-20 12:48:49,585 INFO L428 stractBuchiCegarLoop]: Abstraction has 90 states and 130 transitions. [2022-11-20 12:48:49,586 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2022-11-20 12:48:49,586 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 90 states and 130 transitions. [2022-11-20 12:48:49,589 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-11-20 12:48:49,590 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-20 12:48:49,590 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-20 12:48:49,590 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:48:49,591 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-11-20 12:48:49,591 INFO L748 eck$LassoCheckResult]: Stem: 585#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 586#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 579#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 602#rec2ENTRY ~j := #in~j; 647#L18 assume !(~j <= 0); 626#L20 call #t~ret3 := rec1(~j - 1);< 645#rec1ENTRY ~i := #in~i; 642#L12 assume !(~i <= 0); 589#L14 call #t~ret0 := rec1(~i - 2);< 641#rec1ENTRY ~i := #in~i; 644#L12 assume ~i <= 0;#res := 0; 640#rec1FINAL assume true; 636#rec1EXIT >#28#return; 596#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 603#rec1ENTRY [2022-11-20 12:48:49,591 INFO L750 eck$LassoCheckResult]: Loop: 603#rec1ENTRY ~i := #in~i; 650#L12 assume !(~i <= 0); 591#L14 call #t~ret0 := rec1(~i - 2);< 603#rec1ENTRY [2022-11-20 12:48:49,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:48:49,592 INFO L85 PathProgramCache]: Analyzing trace with hash 372282091, now seen corresponding path program 1 times [2022-11-20 12:48:49,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:48:49,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406082879] [2022-11-20 12:48:49,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:48:49,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:48:49,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:48:49,620 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:48:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:48:49,629 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:48:49,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:48:49,630 INFO L85 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 2 times [2022-11-20 12:48:49,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:48:49,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022125675] [2022-11-20 12:48:49,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:48:49,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:48:49,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:48:49,643 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:48:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:48:49,647 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:48:49,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:48:49,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1050214860, now seen corresponding path program 2 times [2022-11-20 12:48:49,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:48:49,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371589413] [2022-11-20 12:48:49,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:48:49,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:48:49,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:48:49,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:48:49,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:48:49,815 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:48:49,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:48:49,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371589413] [2022-11-20 12:48:49,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371589413] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:48:49,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:48:49,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 12:48:49,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049680010] [2022-11-20 12:48:49,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:48:49,855 INFO L210 LassoAnalysis]: Preferences: [2022-11-20 12:48:49,855 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-20 12:48:49,855 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-20 12:48:49,855 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-20 12:48:49,855 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-20 12:48:49,855 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:49,856 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-20 12:48:49,856 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-20 12:48:49,856 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration3_Loop [2022-11-20 12:48:49,856 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-20 12:48:49,856 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-20 12:48:49,857 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:49,860 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:49,867 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:49,870 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:49,872 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:49,875 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:49,908 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-20 12:48:49,908 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-20 12:48:49,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:49,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:49,910 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:49,916 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-20 12:48:49,916 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-20 12:48:49,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2022-11-20 12:48:49,940 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-20 12:48:49,941 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-20 12:48:49,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:49,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:49,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:49,950 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:49,962 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-20 12:48:49,962 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-20 12:48:49,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2022-11-20 12:48:50,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:50,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:50,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:50,008 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:50,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2022-11-20 12:48:50,012 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-20 12:48:50,012 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-20 12:48:50,082 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-20 12:48:50,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:50,086 INFO L210 LassoAnalysis]: Preferences: [2022-11-20 12:48:50,086 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-20 12:48:50,086 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-20 12:48:50,086 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-20 12:48:50,086 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-20 12:48:50,086 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:50,086 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-20 12:48:50,086 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-20 12:48:50,086 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration3_Loop [2022-11-20 12:48:50,087 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-20 12:48:50,087 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-20 12:48:50,088 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:50,091 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:50,099 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:50,102 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:50,105 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:50,108 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:50,148 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-20 12:48:50,148 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-20 12:48:50,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:50,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:50,150 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:50,160 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 [2022-11-20 12:48:50,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2022-11-20 12:48:50,175 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-20 12:48:50,175 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-20 12:48:50,175 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-20 12:48:50,176 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-20 12:48:50,176 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-20 12:48:50,176 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-20 12:48:50,177 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-20 12:48:50,203 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-20 12:48:50,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:50,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:50,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:50,213 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:50,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2022-11-20 12:48:50,218 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 [2022-11-20 12:48:50,232 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-20 12:48:50,232 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-20 12:48:50,232 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-20 12:48:50,232 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-20 12:48:50,232 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-20 12:48:50,234 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-20 12:48:50,234 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-20 12:48:50,243 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-20 12:48:50,246 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2022-11-20 12:48:50,246 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-11-20 12:48:50,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:50,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:50,250 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:50,252 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-20 12:48:50,252 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-20 12:48:50,252 INFO L513 LassoAnalysis]: Proved termination. [2022-11-20 12:48:50,252 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2022-11-20 12:48:50,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2022-11-20 12:48:50,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:50,263 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-20 12:48:50,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:48:50,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:48:50,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 12:48:50,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:48:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:48:50,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 12:48:50,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:48:50,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:48:50,465 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 [2022-11-20 12:48:50,465 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 90 states and 130 transitions. cyclomatic complexity: 47 Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:48:50,612 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 90 states and 130 transitions. cyclomatic complexity: 47. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 135 states and 194 transitions. Complement of second has 14 states. [2022-11-20 12:48:50,622 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 [2022-11-20 12:48:50,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:48:50,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2022-11-20 12:48:50,624 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 14 letters. Loop has 3 letters. [2022-11-20 12:48:50,624 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-20 12:48:50,624 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 17 letters. Loop has 3 letters. [2022-11-20 12:48:50,625 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-20 12:48:50,625 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 14 letters. Loop has 6 letters. [2022-11-20 12:48:50,625 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-20 12:48:50,625 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 194 transitions. [2022-11-20 12:48:50,629 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-11-20 12:48:50,633 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 123 states and 182 transitions. [2022-11-20 12:48:50,633 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 49 [2022-11-20 12:48:50,634 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 51 [2022-11-20 12:48:50,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 123 states and 182 transitions. [2022-11-20 12:48:50,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-20 12:48:50,634 INFO L218 hiAutomatonCegarLoop]: Abstraction has 123 states and 182 transitions. [2022-11-20 12:48:50,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states and 182 transitions. [2022-11-20 12:48:50,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 114. [2022-11-20 12:48:50,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 65 states have (on average 1.2307692307692308) internal successors, (80), 74 states have internal predecessors, (80), 33 states have call successors, (33), 19 states have call predecessors, (33), 16 states have return successors, (53), 20 states have call predecessors, (53), 28 states have call successors, (53) [2022-11-20 12:48:50,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 166 transitions. [2022-11-20 12:48:50,673 INFO L240 hiAutomatonCegarLoop]: Abstraction has 114 states and 166 transitions. [2022-11-20 12:48:50,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:48:50,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:48:50,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:48:50,678 INFO L87 Difference]: Start difference. First operand 114 states and 166 transitions. Second operand has 6 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:48:50,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:48:50,797 INFO L93 Difference]: Finished difference Result 124 states and 176 transitions. [2022-11-20 12:48:50,798 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 124 states and 176 transitions. [2022-11-20 12:48:50,801 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2022-11-20 12:48:50,811 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 124 states to 122 states and 174 transitions. [2022-11-20 12:48:50,811 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 56 [2022-11-20 12:48:50,817 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 56 [2022-11-20 12:48:50,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 174 transitions. [2022-11-20 12:48:50,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-20 12:48:50,818 INFO L218 hiAutomatonCegarLoop]: Abstraction has 122 states and 174 transitions. [2022-11-20 12:48:50,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states and 174 transitions. [2022-11-20 12:48:50,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 102. [2022-11-20 12:48:50,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 64 states have internal predecessors, (68), 31 states have call successors, (31), 17 states have call predecessors, (31), 14 states have return successors, (45), 20 states have call predecessors, (45), 26 states have call successors, (45) [2022-11-20 12:48:50,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 144 transitions. [2022-11-20 12:48:50,833 INFO L240 hiAutomatonCegarLoop]: Abstraction has 102 states and 144 transitions. [2022-11-20 12:48:50,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:48:50,836 INFO L428 stractBuchiCegarLoop]: Abstraction has 102 states and 144 transitions. [2022-11-20 12:48:50,836 INFO L335 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2022-11-20 12:48:50,836 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 102 states and 144 transitions. [2022-11-20 12:48:50,838 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2022-11-20 12:48:50,838 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-20 12:48:50,839 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-20 12:48:50,839 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:48:50,840 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-20 12:48:50,840 INFO L748 eck$LassoCheckResult]: Stem: 1147#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 1148#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 1142#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 1164#rec2ENTRY ~j := #in~j; 1207#L18 assume !(~j <= 0); 1151#L20 call #t~ret3 := rec1(~j - 1);< 1206#rec1ENTRY ~i := #in~i; 1205#L12 assume !(~i <= 0); 1166#L14 call #t~ret0 := rec1(~i - 2);< 1203#rec1ENTRY ~i := #in~i; 1201#L12 assume !(~i <= 0); 1173#L14 call #t~ret0 := rec1(~i - 2);< 1200#rec1ENTRY ~i := #in~i; 1202#L12 assume ~i <= 0;#res := 0; 1231#rec1FINAL assume true; 1232#rec1EXIT >#28#return; 1178#L14-1 [2022-11-20 12:48:50,840 INFO L750 eck$LassoCheckResult]: Loop: 1178#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1179#rec1ENTRY ~i := #in~i; 1191#L12 assume ~i <= 0;#res := 0; 1182#rec1FINAL assume true; 1184#rec1EXIT >#30#return; 1165#L14-2 call #t~ret2 := rec1(#t~ret1);< 1174#rec1ENTRY ~i := #in~i; 1230#L12 assume !(~i <= 0); 1167#L14 call #t~ret0 := rec1(~i - 2);< 1174#rec1ENTRY ~i := #in~i; 1230#L12 assume ~i <= 0;#res := 0; 1229#rec1FINAL assume true; 1224#rec1EXIT >#28#return; 1178#L14-1 [2022-11-20 12:48:50,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:48:50,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1325197585, now seen corresponding path program 1 times [2022-11-20 12:48:50,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:48:50,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440649889] [2022-11-20 12:48:50,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:48:50,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:48:50,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:48:50,850 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:48:50,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:48:50,858 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:48:50,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:48:50,859 INFO L85 PathProgramCache]: Analyzing trace with hash 949089090, now seen corresponding path program 1 times [2022-11-20 12:48:50,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:48:50,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441316068] [2022-11-20 12:48:50,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:48:50,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:48:50,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:48:50,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-20 12:48:50,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:48:50,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:48:50,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:48:50,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:48:50,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:48:50,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441316068] [2022-11-20 12:48:50,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441316068] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:48:50,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360101721] [2022-11-20 12:48:50,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:48:50,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:48:50,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:50,958 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:48:50,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-20 12:48:51,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:48:51,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 12:48:51,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:48:51,039 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:48:51,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:48:51,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360101721] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:48:51,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:48:51,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2022-11-20 12:48:51,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836212724] [2022-11-20 12:48:51,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:48:51,041 INFO L765 eck$LassoCheckResult]: loop already infeasible [2022-11-20 12:48:51,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:48:51,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:48:51,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:48:51,043 INFO L87 Difference]: Start difference. First operand 102 states and 144 transitions. cyclomatic complexity: 49 Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:48:51,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:48:51,132 INFO L93 Difference]: Finished difference Result 118 states and 162 transitions. [2022-11-20 12:48:51,132 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 118 states and 162 transitions. [2022-11-20 12:48:51,136 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-11-20 12:48:51,141 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 118 states to 118 states and 162 transitions. [2022-11-20 12:48:51,141 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 54 [2022-11-20 12:48:51,142 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 54 [2022-11-20 12:48:51,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 118 states and 162 transitions. [2022-11-20 12:48:51,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-20 12:48:51,142 INFO L218 hiAutomatonCegarLoop]: Abstraction has 118 states and 162 transitions. [2022-11-20 12:48:51,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states and 162 transitions. [2022-11-20 12:48:51,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2022-11-20 12:48:51,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 70 states have internal predecessors, (74), 35 states have call successors, (35), 19 states have call predecessors, (35), 16 states have return successors, (49), 24 states have call predecessors, (49), 30 states have call successors, (49) [2022-11-20 12:48:51,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 158 transitions. [2022-11-20 12:48:51,162 INFO L240 hiAutomatonCegarLoop]: Abstraction has 114 states and 158 transitions. [2022-11-20 12:48:51,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:48:51,164 INFO L428 stractBuchiCegarLoop]: Abstraction has 114 states and 158 transitions. [2022-11-20 12:48:51,164 INFO L335 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2022-11-20 12:48:51,164 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 114 states and 158 transitions. [2022-11-20 12:48:51,166 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-11-20 12:48:51,166 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-20 12:48:51,166 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-20 12:48:51,168 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:48:51,168 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:48:51,169 INFO L748 eck$LassoCheckResult]: Stem: 1426#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 1427#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 1420#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 1443#rec2ENTRY ~j := #in~j; 1486#L18 assume !(~j <= 0); 1429#L20 call #t~ret3 := rec1(~j - 1);< 1485#rec1ENTRY ~i := #in~i; 1484#L12 assume !(~i <= 0); 1474#L14 call #t~ret0 := rec1(~i - 2);< 1481#rec1ENTRY ~i := #in~i; 1482#L12 assume ~i <= 0;#res := 0; 1527#rec1FINAL assume true; 1523#rec1EXIT >#28#return; 1448#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1449#rec1ENTRY ~i := #in~i; 1532#L12 assume ~i <= 0;#res := 0; 1530#rec1FINAL assume true; 1457#rec1EXIT >#30#return; 1444#L14-2 call #t~ret2 := rec1(#t~ret1);< 1445#rec1ENTRY ~i := #in~i; 1462#L12 assume ~i <= 0;#res := 0; 1452#rec1FINAL assume true; 1454#rec1EXIT >#32#return; 1428#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 1431#rec1FINAL assume true; 1478#rec1EXIT >#34#return; 1419#L20-1 [2022-11-20 12:48:51,169 INFO L750 eck$LassoCheckResult]: Loop: 1419#L20-1 call #t~ret4 := rec2(#t~ret3);< 1423#rec2ENTRY ~j := #in~j; 1459#L18 assume !(~j <= 0); 1461#L20 call #t~ret3 := rec1(~j - 1);< 1465#rec1ENTRY ~i := #in~i; 1529#L12 assume !(~i <= 0); 1471#L14 call #t~ret0 := rec1(~i - 2);< 1465#rec1ENTRY ~i := #in~i; 1529#L12 assume ~i <= 0;#res := 0; 1528#rec1FINAL assume true; 1524#rec1EXIT >#28#return; 1458#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1449#rec1ENTRY ~i := #in~i; 1532#L12 assume ~i <= 0;#res := 0; 1530#rec1FINAL assume true; 1457#rec1EXIT >#30#return; 1453#L14-2 call #t~ret2 := rec1(#t~ret1);< 1445#rec1ENTRY ~i := #in~i; 1462#L12 assume ~i <= 0;#res := 0; 1452#rec1FINAL assume true; 1454#rec1EXIT >#32#return; 1477#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 1490#rec1FINAL assume true; 1469#rec1EXIT >#34#return; 1419#L20-1 [2022-11-20 12:48:51,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:48:51,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1231361643, now seen corresponding path program 1 times [2022-11-20 12:48:51,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:48:51,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858150474] [2022-11-20 12:48:51,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:48:51,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:48:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:48:51,181 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:48:51,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:48:51,192 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:48:51,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:48:51,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1591101301, now seen corresponding path program 1 times [2022-11-20 12:48:51,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:48:51,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940209672] [2022-11-20 12:48:51,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:48:51,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:48:51,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:48:51,203 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:48:51,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:48:51,214 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:48:51,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:48:51,215 INFO L85 PathProgramCache]: Analyzing trace with hash 774680821, now seen corresponding path program 1 times [2022-11-20 12:48:51,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:48:51,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330820179] [2022-11-20 12:48:51,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:48:51,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:48:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:48:51,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:51,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:51,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-20 12:48:51,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:48:51,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:48:51,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:48:51,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-20 12:48:51,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:48:51,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 12:48:51,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:48:51,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 12:48:51,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:48:51,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:48:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:48:51,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-20 12:48:51,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:48:51,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 12:48:51,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:48:51,645 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-20 12:48:51,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:48:51,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330820179] [2022-11-20 12:48:51,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330820179] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:48:51,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354541315] [2022-11-20 12:48:51,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:48:51,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:48:51,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:51,648 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:48:51,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-20 12:48:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:48:51,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 12:48:51,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:48:51,810 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-20 12:48:51,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:48:52,076 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-20 12:48:52,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354541315] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:48:52,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:48:52,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 12 [2022-11-20 12:48:52,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398210333] [2022-11-20 12:48:52,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:48:52,441 INFO L210 LassoAnalysis]: Preferences: [2022-11-20 12:48:52,441 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-20 12:48:52,441 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-20 12:48:52,441 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-20 12:48:52,441 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-20 12:48:52,441 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:52,441 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-20 12:48:52,441 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-20 12:48:52,441 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration5_Loop [2022-11-20 12:48:52,442 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-20 12:48:52,442 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-20 12:48:52,443 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:52,455 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:52,458 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:52,506 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-20 12:48:52,506 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-20 12:48:52,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:52,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:52,508 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:52,517 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-20 12:48:52,517 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-20 12:48:52,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2022-11-20 12:48:52,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:52,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:52,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:52,553 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:52,564 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-20 12:48:52,564 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-20 12:48:52,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2022-11-20 12:48:54,824 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-20 12:48:54,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Ended with exit code 0 [2022-11-20 12:48:54,828 INFO L210 LassoAnalysis]: Preferences: [2022-11-20 12:48:54,829 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-20 12:48:54,829 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-20 12:48:54,829 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-20 12:48:54,829 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-20 12:48:54,829 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:54,829 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-20 12:48:54,829 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-20 12:48:54,829 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration5_Loop [2022-11-20 12:48:54,829 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-20 12:48:54,829 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-20 12:48:54,830 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:54,849 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:54,851 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:54,920 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-20 12:48:54,920 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-20 12:48:54,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:54,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:54,922 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:54,931 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 [2022-11-20 12:48:54,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2022-11-20 12:48:54,946 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-20 12:48:54,946 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-20 12:48:54,946 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-20 12:48:54,946 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-20 12:48:54,947 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-20 12:48:54,950 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-20 12:48:54,950 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-20 12:48:54,967 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-20 12:48:54,985 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-11-20 12:48:54,985 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-11-20 12:48:54,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:54,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:55,007 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:55,012 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-20 12:48:55,012 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-20 12:48:55,012 INFO L513 LassoAnalysis]: Proved termination. [2022-11-20 12:48:55,012 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#t~ret3) = 1*rec2_#t~ret3 Supporting invariants [] [2022-11-20 12:48:55,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2022-11-20 12:48:55,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:55,022 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-20 12:48:55,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:48:55,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:48:55,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 12:48:55,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:48:55,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:48:55,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 12:48:55,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:48:55,676 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 12:48:55,677 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 [2022-11-20 12:48:55,678 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 114 states and 158 transitions. cyclomatic complexity: 51 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, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-20 12:48:56,209 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 114 states and 158 transitions. cyclomatic complexity: 51. 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, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Result 585 states and 904 transitions. Complement of second has 45 states. [2022-11-20 12:48:56,210 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 [2022-11-20 12:48:56,211 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, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-20 12:48:56,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 53 transitions. [2022-11-20 12:48:56,212 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 53 transitions. Stem has 26 letters. Loop has 24 letters. [2022-11-20 12:48:56,212 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-20 12:48:56,213 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 53 transitions. Stem has 50 letters. Loop has 24 letters. [2022-11-20 12:48:56,213 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-20 12:48:56,214 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 53 transitions. Stem has 26 letters. Loop has 48 letters. [2022-11-20 12:48:56,215 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-20 12:48:56,215 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 585 states and 904 transitions. [2022-11-20 12:48:56,226 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2022-11-20 12:48:56,237 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 585 states to 433 states and 650 transitions. [2022-11-20 12:48:56,237 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 141 [2022-11-20 12:48:56,238 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 142 [2022-11-20 12:48:56,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 433 states and 650 transitions. [2022-11-20 12:48:56,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-20 12:48:56,239 INFO L218 hiAutomatonCegarLoop]: Abstraction has 433 states and 650 transitions. [2022-11-20 12:48:56,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states and 650 transitions. [2022-11-20 12:48:56,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 384. [2022-11-20 12:48:56,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 203 states have (on average 1.1428571428571428) internal successors, (232), 226 states have internal predecessors, (232), 125 states have call successors, (129), 57 states have call predecessors, (129), 56 states have return successors, (174), 100 states have call predecessors, (174), 116 states have call successors, (174) [2022-11-20 12:48:56,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 535 transitions. [2022-11-20 12:48:56,274 INFO L240 hiAutomatonCegarLoop]: Abstraction has 384 states and 535 transitions. [2022-11-20 12:48:56,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:48:56,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 12:48:56,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-20 12:48:56,276 INFO L87 Difference]: Start difference. First operand 384 states and 535 transitions. Second operand has 13 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-20 12:48:56,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:48:56,533 INFO L93 Difference]: Finished difference Result 443 states and 646 transitions. [2022-11-20 12:48:56,533 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 443 states and 646 transitions. [2022-11-20 12:48:56,542 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2022-11-20 12:48:56,550 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 443 states to 350 states and 496 transitions. [2022-11-20 12:48:56,550 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 132 [2022-11-20 12:48:56,552 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 136 [2022-11-20 12:48:56,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 350 states and 496 transitions. [2022-11-20 12:48:56,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-20 12:48:56,553 INFO L218 hiAutomatonCegarLoop]: Abstraction has 350 states and 496 transitions. [2022-11-20 12:48:56,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states and 496 transitions. [2022-11-20 12:48:56,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 315. [2022-11-20 12:48:56,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 169 states have (on average 1.1005917159763314) internal successors, (186), 183 states have internal predecessors, (186), 100 states have call successors, (102), 49 states have call predecessors, (102), 46 states have return successors, (128), 82 states have call predecessors, (128), 84 states have call successors, (128) [2022-11-20 12:48:56,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 416 transitions. [2022-11-20 12:48:56,596 INFO L240 hiAutomatonCegarLoop]: Abstraction has 315 states and 416 transitions. [2022-11-20 12:48:56,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 12:48:56,597 INFO L428 stractBuchiCegarLoop]: Abstraction has 315 states and 416 transitions. [2022-11-20 12:48:56,598 INFO L335 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2022-11-20 12:48:56,598 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 315 states and 416 transitions. [2022-11-20 12:48:56,601 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2022-11-20 12:48:56,601 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-20 12:48:56,601 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-20 12:48:56,602 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:48:56,603 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-11-20 12:48:56,603 INFO L748 eck$LassoCheckResult]: Stem: 3565#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 3566#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 3561#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 3591#rec2ENTRY ~j := #in~j; 3658#L18 assume !(~j <= 0); 3655#L20 call #t~ret3 := rec1(~j - 1);< 3656#rec1ENTRY ~i := #in~i; 3672#L12 assume !(~i <= 0); 3662#L14 call #t~ret0 := rec1(~i - 2);< 3671#rec1ENTRY ~i := #in~i; 3678#L12 assume ~i <= 0;#res := 0; 3706#rec1FINAL assume true; 3705#rec1EXIT >#28#return; 3698#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 3699#rec1ENTRY ~i := #in~i; 3703#L12 assume ~i <= 0;#res := 0; 3702#rec1FINAL assume true; 3697#rec1EXIT >#30#return; 3690#L14-2 call #t~ret2 := rec1(#t~ret1);< 3695#rec1ENTRY ~i := #in~i; 3701#L12 assume ~i <= 0;#res := 0; 3696#rec1FINAL assume true; 3694#rec1EXIT >#32#return; 3692#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 3729#rec1FINAL assume true; 3726#rec1EXIT >#34#return; 3558#L20-1 call #t~ret4 := rec2(#t~ret3);< 3560#rec2ENTRY ~j := #in~j; 3745#L18 assume !(~j <= 0); 3723#L20 call #t~ret3 := rec1(~j - 1);< 3642#rec1ENTRY ~i := #in~i; 3744#L12 assume !(~i <= 0); 3568#L14 call #t~ret0 := rec1(~i - 2);< 3594#rec1ENTRY [2022-11-20 12:48:56,603 INFO L750 eck$LassoCheckResult]: Loop: 3594#rec1ENTRY ~i := #in~i; 3743#L12 assume !(~i <= 0); 3580#L14 call #t~ret0 := rec1(~i - 2);< 3594#rec1ENTRY [2022-11-20 12:48:56,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:48:56,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1565705522, now seen corresponding path program 2 times [2022-11-20 12:48:56,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:48:56,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229386448] [2022-11-20 12:48:56,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:48:56,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:48:56,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:48:56,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-20 12:48:56,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:48:56,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:48:56,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:48:56,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-20 12:48:56,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:48:56,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 12:48:56,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:48:56,771 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 12:48:56,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:48:56,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229386448] [2022-11-20 12:48:56,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229386448] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:48:56,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713826192] [2022-11-20 12:48:56,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:48:56,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:48:56,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:56,775 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:48:56,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-20 12:48:56,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:48:56,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:48:56,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 12:48:56,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:48:56,868 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 12:48:56,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:48:57,039 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 12:48:57,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713826192] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:48:57,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:48:57,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 10 [2022-11-20 12:48:57,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977994556] [2022-11-20 12:48:57,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:48:57,043 INFO L753 eck$LassoCheckResult]: stem already infeasible [2022-11-20 12:48:57,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:48:57,044 INFO L85 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 3 times [2022-11-20 12:48:57,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:48:57,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277036219] [2022-11-20 12:48:57,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:48:57,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:48:57,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:48:57,048 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:48:57,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:48:57,050 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:48:57,109 INFO L210 LassoAnalysis]: Preferences: [2022-11-20 12:48:57,109 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-20 12:48:57,109 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-20 12:48:57,109 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-20 12:48:57,109 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-20 12:48:57,109 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:57,110 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-20 12:48:57,110 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-20 12:48:57,110 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration6_Loop [2022-11-20 12:48:57,110 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-20 12:48:57,110 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-20 12:48:57,111 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:57,114 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:57,118 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:57,126 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:57,129 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:57,133 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:57,171 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-20 12:48:57,171 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-20 12:48:57,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:57,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:57,175 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:57,180 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-20 12:48:57,181 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-20 12:48:57,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2022-11-20 12:48:57,216 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-20 12:48:57,216 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-20 12:48:57,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:57,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:57,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:57,227 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:57,232 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-20 12:48:57,232 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-20 12:48:57,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2022-11-20 12:48:57,267 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-20 12:48:57,267 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-20 12:48:57,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:57,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:57,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:57,278 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:57,288 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-20 12:48:57,288 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-20 12:48:57,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2022-11-20 12:48:57,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:57,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:57,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:57,329 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:57,336 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-20 12:48:57,336 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-20 12:48:57,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2022-11-20 12:48:57,374 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-20 12:48:57,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Ended with exit code 0 [2022-11-20 12:48:57,378 INFO L210 LassoAnalysis]: Preferences: [2022-11-20 12:48:57,378 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-20 12:48:57,378 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-20 12:48:57,378 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-20 12:48:57,378 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-20 12:48:57,378 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:57,378 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-20 12:48:57,378 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-20 12:48:57,378 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration6_Loop [2022-11-20 12:48:57,378 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-20 12:48:57,378 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-20 12:48:57,379 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:57,382 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:57,385 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:57,388 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:57,401 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:57,404 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:57,456 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-20 12:48:57,457 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-20 12:48:57,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:57,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:57,460 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:57,465 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 [2022-11-20 12:48:57,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2022-11-20 12:48:57,481 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-20 12:48:57,481 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-20 12:48:57,481 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-20 12:48:57,482 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-20 12:48:57,482 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-20 12:48:57,482 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-20 12:48:57,483 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-20 12:48:57,499 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-20 12:48:57,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:57,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:57,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:57,505 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:57,511 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 [2022-11-20 12:48:57,527 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-20 12:48:57,527 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-20 12:48:57,527 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-20 12:48:57,527 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-20 12:48:57,527 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-20 12:48:57,528 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-20 12:48:57,528 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-20 12:48:57,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2022-11-20 12:48:57,537 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-20 12:48:57,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:57,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:57,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:57,544 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:57,551 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 [2022-11-20 12:48:57,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Waiting until timeout for monitored process [2022-11-20 12:48:57,567 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-20 12:48:57,567 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-20 12:48:57,567 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-20 12:48:57,568 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-20 12:48:57,568 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-20 12:48:57,568 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-20 12:48:57,569 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-20 12:48:57,583 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-20 12:48:57,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:57,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:57,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:57,589 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:57,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Waiting until timeout for monitored process [2022-11-20 12:48:57,596 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 [2022-11-20 12:48:57,612 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-20 12:48:57,612 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-20 12:48:57,612 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-20 12:48:57,612 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-20 12:48:57,612 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-20 12:48:57,614 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-20 12:48:57,614 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-20 12:48:57,631 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-20 12:48:57,634 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2022-11-20 12:48:57,634 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-11-20 12:48:57,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:57,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:57,638 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:57,647 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-20 12:48:57,647 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-20 12:48:57,647 INFO L513 LassoAnalysis]: Proved termination. [2022-11-20 12:48:57,647 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2022-11-20 12:48:57,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Waiting until timeout for monitored process [2022-11-20 12:48:57,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:57,652 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-20 12:48:57,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:48:57,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:48:57,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 12:48:57,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:48:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:48:58,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 12:48:58,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:48:58,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:48:58,045 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 [2022-11-20 12:48:58,045 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 315 states and 416 transitions. cyclomatic complexity: 114 Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 12:48:58,139 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 315 states and 416 transitions. cyclomatic complexity: 114. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 349 states and 456 transitions. Complement of second has 14 states. [2022-11-20 12:48:58,140 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 [2022-11-20 12:48:58,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 12:48:58,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 18 transitions. [2022-11-20 12:48:58,142 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 33 letters. Loop has 3 letters. [2022-11-20 12:48:58,142 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-20 12:48:58,142 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-11-20 12:48:58,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:48:58,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:48:58,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 12:48:58,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:48:58,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:48:58,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 12:48:58,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:48:58,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:48:58,542 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 [2022-11-20 12:48:58,543 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 315 states and 416 transitions. cyclomatic complexity: 114 Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 12:48:58,631 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 315 states and 416 transitions. cyclomatic complexity: 114. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 349 states and 456 transitions. Complement of second has 14 states. [2022-11-20 12:48:58,631 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 [2022-11-20 12:48:58,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 12:48:58,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 18 transitions. [2022-11-20 12:48:58,633 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 33 letters. Loop has 3 letters. [2022-11-20 12:48:58,633 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-20 12:48:58,633 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-11-20 12:48:58,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:48:58,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:48:58,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 12:48:58,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:48:58,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:48:58,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 12:48:58,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:48:58,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:48:58,996 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 [2022-11-20 12:48:58,996 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 315 states and 416 transitions. cyclomatic complexity: 114 Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 12:48:59,118 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 315 states and 416 transitions. cyclomatic complexity: 114. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 486 states and 617 transitions. Complement of second has 16 states. [2022-11-20 12:48:59,119 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 [2022-11-20 12:48:59,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 12:48:59,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 25 transitions. [2022-11-20 12:48:59,121 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 33 letters. Loop has 3 letters. [2022-11-20 12:48:59,121 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-20 12:48:59,121 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 36 letters. Loop has 3 letters. [2022-11-20 12:48:59,122 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-20 12:48:59,122 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 33 letters. Loop has 6 letters. [2022-11-20 12:48:59,122 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-20 12:48:59,122 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 486 states and 617 transitions. [2022-11-20 12:48:59,130 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 26 [2022-11-20 12:48:59,136 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 486 states to 396 states and 527 transitions. [2022-11-20 12:48:59,136 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 130 [2022-11-20 12:48:59,137 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 137 [2022-11-20 12:48:59,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 396 states and 527 transitions. [2022-11-20 12:48:59,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-20 12:48:59,137 INFO L218 hiAutomatonCegarLoop]: Abstraction has 396 states and 527 transitions. [2022-11-20 12:48:59,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states and 527 transitions. [2022-11-20 12:48:59,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 352. [2022-11-20 12:48:59,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 196 states have (on average 1.1275510204081634) internal successors, (221), 212 states have internal predecessors, (221), 102 states have call successors, (104), 57 states have call predecessors, (104), 54 states have return successors, (132), 82 states have call predecessors, (132), 86 states have call successors, (132) [2022-11-20 12:48:59,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 457 transitions. [2022-11-20 12:48:59,153 INFO L240 hiAutomatonCegarLoop]: Abstraction has 352 states and 457 transitions. [2022-11-20 12:48:59,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:48:59,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:48:59,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:48:59,155 INFO L87 Difference]: Start difference. First operand 352 states and 457 transitions. Second operand has 10 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 12:48:59,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:48:59,286 INFO L93 Difference]: Finished difference Result 379 states and 514 transitions. [2022-11-20 12:48:59,286 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 379 states and 514 transitions. [2022-11-20 12:48:59,292 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2022-11-20 12:48:59,294 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 379 states to 105 states and 143 transitions. [2022-11-20 12:48:59,295 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 99 [2022-11-20 12:48:59,295 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 99 [2022-11-20 12:48:59,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 143 transitions. [2022-11-20 12:48:59,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-20 12:48:59,296 INFO L218 hiAutomatonCegarLoop]: Abstraction has 105 states and 143 transitions. [2022-11-20 12:48:59,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 143 transitions. [2022-11-20 12:48:59,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 87. [2022-11-20 12:48:59,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 54 states have internal predecessors, (57), 22 states have call successors, (22), 15 states have call predecessors, (22), 14 states have return successors, (28), 17 states have call predecessors, (28), 20 states have call successors, (28) [2022-11-20 12:48:59,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 107 transitions. [2022-11-20 12:48:59,301 INFO L240 hiAutomatonCegarLoop]: Abstraction has 87 states and 107 transitions. [2022-11-20 12:48:59,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 12:48:59,303 INFO L428 stractBuchiCegarLoop]: Abstraction has 87 states and 107 transitions. [2022-11-20 12:48:59,303 INFO L335 stractBuchiCegarLoop]: ======== Iteration 7 ============ [2022-11-20 12:48:59,303 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 87 states and 107 transitions. [2022-11-20 12:48:59,304 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2022-11-20 12:48:59,304 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-20 12:48:59,304 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-20 12:48:59,305 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:48:59,305 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-11-20 12:48:59,305 INFO L748 eck$LassoCheckResult]: Stem: 6435#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 6436#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 6434#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 6446#rec2ENTRY ~j := #in~j; 6506#L18 assume !(~j <= 0); 6503#L20 call #t~ret3 := rec1(~j - 1);< 6505#rec1ENTRY ~i := #in~i; 6504#L12 assume !(~i <= 0); 6464#L14 call #t~ret0 := rec1(~i - 2);< 6470#rec1ENTRY ~i := #in~i; 6467#L12 assume !(~i <= 0); 6463#L14 [2022-11-20 12:48:59,306 INFO L750 eck$LassoCheckResult]: Loop: 6463#L14 call #t~ret0 := rec1(~i - 2);< 6465#rec1ENTRY ~i := #in~i; 6467#L12 assume !(~i <= 0); 6463#L14 [2022-11-20 12:48:59,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:48:59,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1203085824, now seen corresponding path program 3 times [2022-11-20 12:48:59,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:48:59,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187523303] [2022-11-20 12:48:59,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:48:59,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:48:59,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:48:59,311 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:48:59,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:48:59,314 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:48:59,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:48:59,315 INFO L85 PathProgramCache]: Analyzing trace with hash 55742, now seen corresponding path program 4 times [2022-11-20 12:48:59,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:48:59,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027350362] [2022-11-20 12:48:59,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:48:59,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:48:59,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:48:59,319 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:48:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:48:59,321 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:48:59,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:48:59,324 INFO L85 PathProgramCache]: Analyzing trace with hash 372328287, now seen corresponding path program 4 times [2022-11-20 12:48:59,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:48:59,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827409575] [2022-11-20 12:48:59,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:48:59,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:48:59,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:48:59,330 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:48:59,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:48:59,336 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:48:59,387 INFO L210 LassoAnalysis]: Preferences: [2022-11-20 12:48:59,387 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-20 12:48:59,387 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-20 12:48:59,387 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-20 12:48:59,388 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-20 12:48:59,388 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:59,388 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-20 12:48:59,388 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-20 12:48:59,388 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration7_Loop [2022-11-20 12:48:59,388 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-20 12:48:59,388 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-20 12:48:59,389 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:59,393 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:59,396 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:59,405 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:59,409 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:48:59,450 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-20 12:48:59,450 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-20 12:48:59,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:59,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:59,452 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:59,456 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-20 12:48:59,456 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-20 12:48:59,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Waiting until timeout for monitored process [2022-11-20 12:48:59,487 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-20 12:48:59,487 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-20 12:48:59,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:59,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:59,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:59,493 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:59,497 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-20 12:48:59,497 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-20 12:48:59,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Waiting until timeout for monitored process [2022-11-20 12:48:59,531 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-20 12:48:59,531 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-20 12:48:59,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:59,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:59,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:59,537 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:59,541 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-20 12:48:59,541 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-20 12:48:59,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Waiting until timeout for monitored process [2022-11-20 12:48:59,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Forceful destruction successful, exit code 0 [2022-11-20 12:48:59,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:48:59,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:48:59,581 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:48:59,585 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-20 12:48:59,585 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-20 12:48:59,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Waiting until timeout for monitored process [2022-11-20 12:49:01,919 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-20 12:49:01,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Forceful destruction successful, exit code 0 [2022-11-20 12:49:01,923 INFO L210 LassoAnalysis]: Preferences: [2022-11-20 12:49:01,923 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-20 12:49:01,923 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-20 12:49:01,923 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-20 12:49:01,924 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-20 12:49:01,924 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:49:01,924 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-20 12:49:01,924 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-20 12:49:01,924 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration7_Loop [2022-11-20 12:49:01,924 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-20 12:49:01,924 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-20 12:49:01,925 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:49:01,933 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:49:01,936 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:49:01,938 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:49:01,940 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:49:01,976 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-20 12:49:01,976 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-20 12:49:01,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:49:01,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:01,978 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:49:01,987 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 [2022-11-20 12:49:01,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Waiting until timeout for monitored process [2022-11-20 12:49:01,998 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-20 12:49:01,999 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-20 12:49:01,999 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-20 12:49:01,999 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-20 12:49:01,999 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-20 12:49:02,000 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-20 12:49:02,000 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-20 12:49:02,003 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-20 12:49:02,006 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-11-20 12:49:02,006 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-11-20 12:49:02,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:49:02,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:02,008 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:49:02,020 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-20 12:49:02,020 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-20 12:49:02,020 INFO L513 LassoAnalysis]: Proved termination. [2022-11-20 12:49:02,020 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_~i) = 1*rec1_~i Supporting invariants [] [2022-11-20 12:49:02,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Waiting until timeout for monitored process [2022-11-20 12:49:02,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Forceful destruction successful, exit code 0 [2022-11-20 12:49:02,024 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-20 12:49:02,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:02,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:02,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 12:49:02,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:49:02,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:02,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 12:49:02,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:49:02,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:02,138 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 [2022-11-20 12:49:02,139 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 87 states and 107 transitions. cyclomatic complexity: 23 Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:49:02,189 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 87 states and 107 transitions. cyclomatic complexity: 23. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 101 states and 125 transitions. Complement of second has 11 states. [2022-11-20 12:49:02,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2022-11-20 12:49:02,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:49:02,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 14 transitions. [2022-11-20 12:49:02,191 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 11 letters. Loop has 3 letters. [2022-11-20 12:49:02,192 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-20 12:49:02,192 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 14 letters. Loop has 3 letters. [2022-11-20 12:49:02,192 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-20 12:49:02,193 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 11 letters. Loop has 6 letters. [2022-11-20 12:49:02,193 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-20 12:49:02,193 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 101 states and 125 transitions. [2022-11-20 12:49:02,196 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2022-11-20 12:49:02,198 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 101 states to 95 states and 118 transitions. [2022-11-20 12:49:02,198 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 84 [2022-11-20 12:49:02,199 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 85 [2022-11-20 12:49:02,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 118 transitions. [2022-11-20 12:49:02,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-20 12:49:02,199 INFO L218 hiAutomatonCegarLoop]: Abstraction has 95 states and 118 transitions. [2022-11-20 12:49:02,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states and 118 transitions. [2022-11-20 12:49:02,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2022-11-20 12:49:02,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 59 states have internal predecessors, (61), 23 states have call successors, (24), 16 states have call predecessors, (24), 15 states have return successors, (30), 17 states have call predecessors, (30), 21 states have call successors, (30) [2022-11-20 12:49:02,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 115 transitions. [2022-11-20 12:49:02,206 INFO L240 hiAutomatonCegarLoop]: Abstraction has 93 states and 115 transitions. [2022-11-20 12:49:02,206 INFO L428 stractBuchiCegarLoop]: Abstraction has 93 states and 115 transitions. [2022-11-20 12:49:02,207 INFO L335 stractBuchiCegarLoop]: ======== Iteration 8 ============ [2022-11-20 12:49:02,207 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 115 transitions. [2022-11-20 12:49:02,208 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2022-11-20 12:49:02,208 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-20 12:49:02,209 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-20 12:49:02,210 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:49:02,210 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-20 12:49:02,211 INFO L748 eck$LassoCheckResult]: Stem: 6695#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 6696#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 6693#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 6706#rec2ENTRY ~j := #in~j; 6716#L18 assume !(~j <= 0); 6717#L20 call #t~ret3 := rec1(~j - 1);< 6748#rec1ENTRY ~i := #in~i; 6749#L12 assume !(~i <= 0); 6740#L14 call #t~ret0 := rec1(~i - 2);< 6746#rec1ENTRY ~i := #in~i; 6784#L12 assume !(~i <= 0); 6719#L14 call #t~ret0 := rec1(~i - 2);< 6727#rec1ENTRY ~i := #in~i; 6718#L12 assume ~i <= 0;#res := 0; 6720#rec1FINAL assume true; 6752#rec1EXIT >#28#return; 6751#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6766#rec1ENTRY ~i := #in~i; 6774#L12 assume ~i <= 0;#res := 0; 6773#rec1FINAL assume true; 6765#rec1EXIT >#30#return; 6762#L14-2 call #t~ret2 := rec1(#t~ret1);< 6764#rec1ENTRY ~i := #in~i; 6778#L12 assume ~i <= 0;#res := 0; 6776#rec1FINAL assume true; 6761#rec1EXIT >#32#return; 6742#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 6757#rec1FINAL assume true; 6735#rec1EXIT >#28#return; 6736#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6743#rec1ENTRY [2022-11-20 12:49:02,211 INFO L750 eck$LassoCheckResult]: Loop: 6743#rec1ENTRY ~i := #in~i; 6759#L12 assume !(~i <= 0); 6722#L14 call #t~ret0 := rec1(~i - 2);< 6758#rec1ENTRY ~i := #in~i; 6721#L12 assume !(~i <= 0); 6712#L14 call #t~ret0 := rec1(~i - 2);< 6728#rec1ENTRY ~i := #in~i; 6729#L12 assume ~i <= 0;#res := 0; 6711#rec1FINAL assume true; 6713#rec1EXIT >#28#return; 6751#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6766#rec1ENTRY ~i := #in~i; 6774#L12 assume ~i <= 0;#res := 0; 6773#rec1FINAL assume true; 6765#rec1EXIT >#30#return; 6762#L14-2 call #t~ret2 := rec1(#t~ret1);< 6764#rec1ENTRY ~i := #in~i; 6778#L12 assume ~i <= 0;#res := 0; 6776#rec1FINAL assume true; 6761#rec1EXIT >#32#return; 6742#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 6757#rec1FINAL assume true; 6735#rec1EXIT >#28#return; 6737#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6743#rec1ENTRY [2022-11-20 12:49:02,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:02,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1060897207, now seen corresponding path program 1 times [2022-11-20 12:49:02,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:02,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013468454] [2022-11-20 12:49:02,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:02,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:02,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:49:02,221 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:49:02,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:49:02,230 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:49:02,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:02,231 INFO L85 PathProgramCache]: Analyzing trace with hash 245881341, now seen corresponding path program 1 times [2022-11-20 12:49:02,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:02,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005313488] [2022-11-20 12:49:02,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:02,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:49:02,239 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:49:02,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:49:02,246 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:49:02,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:02,247 INFO L85 PathProgramCache]: Analyzing trace with hash -2071488077, now seen corresponding path program 2 times [2022-11-20 12:49:02,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:02,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900958105] [2022-11-20 12:49:02,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:02,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:02,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:02,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:49:02,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:02,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:49:02,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:02,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-20 12:49:02,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:02,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 12:49:02,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:02,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-20 12:49:02,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:02,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:49:02,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:02,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-20 12:49:02,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:02,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 12:49:02,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:02,409 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 24 proven. 29 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-20 12:49:02,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:49:02,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900958105] [2022-11-20 12:49:02,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900958105] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:49:02,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775735043] [2022-11-20 12:49:02,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:49:02,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:49:02,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:02,412 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:49:02,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-20 12:49:02,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:49:02,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:49:02,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 12:49:02,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:49:02,534 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-20 12:49:02,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:49:02,670 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 24 proven. 29 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-20 12:49:02,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775735043] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:49:02,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:49:02,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2022-11-20 12:49:02,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490784099] [2022-11-20 12:49:02,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:49:02,990 INFO L210 LassoAnalysis]: Preferences: [2022-11-20 12:49:02,990 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-20 12:49:02,990 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-20 12:49:02,990 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-20 12:49:02,990 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-20 12:49:02,990 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:49:02,990 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-20 12:49:02,990 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-20 12:49:02,990 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration8_Loop [2022-11-20 12:49:02,990 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-20 12:49:02,990 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-20 12:49:02,991 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:49:02,995 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:49:03,005 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:49:03,008 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:49:03,010 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:49:03,013 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:49:03,055 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-20 12:49:03,055 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-20 12:49:03,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:49:03,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:03,063 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:49:03,065 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-20 12:49:03,065 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-20 12:49:03,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Waiting until timeout for monitored process [2022-11-20 12:49:03,095 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-20 12:49:03,095 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-20 12:49:03,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Forceful destruction successful, exit code 0 [2022-11-20 12:49:03,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:49:03,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:03,100 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:49:03,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Waiting until timeout for monitored process [2022-11-20 12:49:03,108 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-20 12:49:03,108 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-20 12:49:03,120 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-20 12:49:03,120 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-20 12:49:03,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Ended with exit code 0 [2022-11-20 12:49:03,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:49:03,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:03,124 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:49:03,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Waiting until timeout for monitored process [2022-11-20 12:49:03,128 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-20 12:49:03,128 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-20 12:49:03,140 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-20 12:49:03,140 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-20 12:49:03,143 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Ended with exit code 0 [2022-11-20 12:49:03,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:49:03,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:03,145 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:49:03,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Waiting until timeout for monitored process [2022-11-20 12:49:03,149 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-20 12:49:03,149 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-20 12:49:03,162 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-20 12:49:03,162 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-20 12:49:03,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Forceful destruction successful, exit code 0 [2022-11-20 12:49:03,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:49:03,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:03,166 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:49:03,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Waiting until timeout for monitored process [2022-11-20 12:49:03,169 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-20 12:49:03,169 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-20 12:49:03,181 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-20 12:49:03,182 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-20 12:49:03,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Ended with exit code 0 [2022-11-20 12:49:03,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:49:03,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:03,186 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:49:03,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Waiting until timeout for monitored process [2022-11-20 12:49:03,188 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-20 12:49:03,188 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-20 12:49:03,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Ended with exit code 0 [2022-11-20 12:49:03,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:49:03,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:03,205 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:49:03,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Waiting until timeout for monitored process [2022-11-20 12:49:03,212 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-20 12:49:03,212 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-20 12:49:03,225 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-20 12:49:03,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Forceful destruction successful, exit code 0 [2022-11-20 12:49:03,228 INFO L210 LassoAnalysis]: Preferences: [2022-11-20 12:49:03,228 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-20 12:49:03,228 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-20 12:49:03,229 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-20 12:49:03,229 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-20 12:49:03,229 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:49:03,229 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-20 12:49:03,229 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-20 12:49:03,229 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration8_Loop [2022-11-20 12:49:03,229 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-20 12:49:03,229 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-20 12:49:03,230 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:49:03,232 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:49:03,235 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:49:03,237 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:49:03,238 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:49:03,240 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-20 12:49:03,277 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-20 12:49:03,278 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-20 12:49:03,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:49:03,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:03,279 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:49:03,287 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 [2022-11-20 12:49:03,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (61)] Waiting until timeout for monitored process [2022-11-20 12:49:03,301 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-20 12:49:03,301 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-20 12:49:03,301 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-20 12:49:03,301 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-20 12:49:03,301 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-20 12:49:03,302 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-20 12:49:03,302 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-20 12:49:03,319 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-20 12:49:03,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (61)] Forceful destruction successful, exit code 0 [2022-11-20 12:49:03,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:49:03,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:03,324 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:49:03,332 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 [2022-11-20 12:49:03,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (62)] Waiting until timeout for monitored process [2022-11-20 12:49:03,344 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-20 12:49:03,344 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-20 12:49:03,344 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-20 12:49:03,344 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-20 12:49:03,344 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-20 12:49:03,345 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-20 12:49:03,345 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-20 12:49:03,346 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-20 12:49:03,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (62)] Ended with exit code 0 [2022-11-20 12:49:03,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:49:03,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:03,351 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:49:03,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (63)] Waiting until timeout for monitored process [2022-11-20 12:49:03,354 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 [2022-11-20 12:49:03,365 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-20 12:49:03,365 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-20 12:49:03,366 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-20 12:49:03,366 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-20 12:49:03,366 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-20 12:49:03,366 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-20 12:49:03,366 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-20 12:49:03,372 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-20 12:49:03,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (63)] Forceful destruction successful, exit code 0 [2022-11-20 12:49:03,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:49:03,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:03,378 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:49:03,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (64)] Waiting until timeout for monitored process [2022-11-20 12:49:03,381 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 [2022-11-20 12:49:03,394 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-20 12:49:03,394 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-20 12:49:03,394 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-20 12:49:03,394 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-20 12:49:03,394 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-20 12:49:03,395 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-20 12:49:03,395 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-20 12:49:03,396 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-20 12:49:03,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (64)] Ended with exit code 0 [2022-11-20 12:49:03,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:49:03,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:03,401 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:49:03,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (65)] Waiting until timeout for monitored process [2022-11-20 12:49:03,404 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 [2022-11-20 12:49:03,416 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-20 12:49:03,416 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-20 12:49:03,416 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-20 12:49:03,416 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-20 12:49:03,416 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-20 12:49:03,417 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-20 12:49:03,417 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-20 12:49:03,444 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-20 12:49:03,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (65)] Forceful destruction successful, exit code 0 [2022-11-20 12:49:03,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:49:03,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:03,449 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:49:03,453 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 [2022-11-20 12:49:03,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (66)] Waiting until timeout for monitored process [2022-11-20 12:49:03,466 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-20 12:49:03,466 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-20 12:49:03,466 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-20 12:49:03,466 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-20 12:49:03,466 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-20 12:49:03,468 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-20 12:49:03,468 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-20 12:49:03,491 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-20 12:49:03,493 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2022-11-20 12:49:03,493 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-11-20 12:49:03,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-20 12:49:03,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:03,496 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-20 12:49:03,498 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-20 12:49:03,498 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-20 12:49:03,498 INFO L513 LassoAnalysis]: Proved termination. [2022-11-20 12:49:03,498 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2022-11-20 12:49:03,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (67)] Waiting until timeout for monitored process [2022-11-20 12:49:03,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (66)] Forceful destruction successful, exit code 0 [2022-11-20 12:49:03,502 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-20 12:49:03,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:03,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:03,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 12:49:03,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:49:03,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (67)] Forceful destruction successful, exit code 0 [2022-11-20 12:49:03,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Forceful destruction successful, exit code 0 [2022-11-20 12:49:03,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:03,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 12:49:03,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:49:04,150 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 12:49:04,152 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 [2022-11-20 12:49:04,153 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 115 transitions. cyclomatic complexity: 26 Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-20 12:49:04,232 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 115 transitions. cyclomatic complexity: 26. Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Result 101 states and 123 transitions. Complement of second has 7 states. [2022-11-20 12:49:04,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2022-11-20 12:49:04,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-20 12:49:04,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 16 transitions. [2022-11-20 12:49:04,234 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 30 letters. Loop has 24 letters. [2022-11-20 12:49:04,234 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-20 12:49:04,234 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-11-20 12:49:04,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:04,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:04,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 12:49:04,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:49:04,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:04,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 12:49:04,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:49:04,760 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 12:49:04,761 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 9 loop predicates [2022-11-20 12:49:04,761 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 115 transitions. cyclomatic complexity: 26 Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-20 12:49:04,830 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 115 transitions. cyclomatic complexity: 26. Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Result 101 states and 123 transitions. Complement of second has 7 states. [2022-11-20 12:49:04,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2022-11-20 12:49:04,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-20 12:49:04,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 16 transitions. [2022-11-20 12:49:04,832 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 30 letters. Loop has 24 letters. [2022-11-20 12:49:04,832 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-20 12:49:04,832 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-11-20 12:49:04,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:04,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 12:49:04,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:49:05,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:05,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 12:49:05,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:49:05,422 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 12:49:05,423 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 [2022-11-20 12:49:05,423 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 115 transitions. cyclomatic complexity: 26 Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-20 12:49:05,779 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 115 transitions. cyclomatic complexity: 26. Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Result 258 states and 304 transitions. Complement of second has 31 states. [2022-11-20 12:49:05,779 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 [2022-11-20 12:49:05,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-20 12:49:05,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 39 transitions. [2022-11-20 12:49:05,780 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 39 transitions. Stem has 30 letters. Loop has 24 letters. [2022-11-20 12:49:05,781 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-20 12:49:05,781 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-11-20 12:49:05,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:05,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 12:49:05,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:49:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:06,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 12:49:06,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:49:06,369 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 12:49:06,369 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 9 loop predicates [2022-11-20 12:49:06,369 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 115 transitions. cyclomatic complexity: 26 Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-20 12:49:07,050 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 115 transitions. cyclomatic complexity: 26. Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Result 410 states and 516 transitions. Complement of second has 80 states. [2022-11-20 12:49:07,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 15 states 2 stem states 12 non-accepting loop states 1 accepting loop states [2022-11-20 12:49:07,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-20 12:49:07,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 50 transitions. [2022-11-20 12:49:07,052 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 50 transitions. Stem has 30 letters. Loop has 24 letters. [2022-11-20 12:49:07,052 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-20 12:49:07,053 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 50 transitions. Stem has 54 letters. Loop has 24 letters. [2022-11-20 12:49:07,053 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-20 12:49:07,053 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 50 transitions. Stem has 30 letters. Loop has 48 letters. [2022-11-20 12:49:07,054 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-20 12:49:07,054 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 410 states and 516 transitions. [2022-11-20 12:49:07,060 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 62 [2022-11-20 12:49:07,064 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 410 states to 254 states and 346 transitions. [2022-11-20 12:49:07,064 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 155 [2022-11-20 12:49:07,065 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 165 [2022-11-20 12:49:07,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 254 states and 346 transitions. [2022-11-20 12:49:07,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-20 12:49:07,066 INFO L218 hiAutomatonCegarLoop]: Abstraction has 254 states and 346 transitions. [2022-11-20 12:49:07,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states and 346 transitions. [2022-11-20 12:49:07,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 217. [2022-11-20 12:49:07,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 127 states have (on average 1.125984251968504) internal successors, (143), 139 states have internal predecessors, (143), 51 states have call successors, (52), 34 states have call predecessors, (52), 39 states have return successors, (76), 43 states have call predecessors, (76), 49 states have call successors, (76) [2022-11-20 12:49:07,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 271 transitions. [2022-11-20 12:49:07,076 INFO L240 hiAutomatonCegarLoop]: Abstraction has 217 states and 271 transitions. [2022-11-20 12:49:07,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:49:07,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 12:49:07,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:49:07,077 INFO L87 Difference]: Start difference. First operand 217 states and 271 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-20 12:49:07,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:49:07,150 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2022-11-20 12:49:07,150 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 36 states and 38 transitions. [2022-11-20 12:49:07,151 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-11-20 12:49:07,151 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 36 states to 0 states and 0 transitions. [2022-11-20 12:49:07,151 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2022-11-20 12:49:07,151 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2022-11-20 12:49:07,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2022-11-20 12:49:07,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:49:07,152 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-20 12:49:07,152 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-20 12:49:07,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:49:07,154 INFO L428 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-20 12:49:07,154 INFO L335 stractBuchiCegarLoop]: ======== Iteration 9 ============ [2022-11-20 12:49:07,154 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2022-11-20 12:49:07,154 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-11-20 12:49:07,154 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2022-11-20 12:49:07,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.11 12:49:07 BoogieIcfgContainer [2022-11-20 12:49:07,164 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2022-11-20 12:49:07,165 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-20 12:49:07,165 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-20 12:49:07,165 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-20 12:49:07,166 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:48:45" (3/4) ... [2022-11-20 12:49:07,169 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-20 12:49:07,169 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-20 12:49:07,170 INFO L158 Benchmark]: Toolchain (without parser) took 21943.40ms. Allocated memory was 136.3MB in the beginning and 222.3MB in the end (delta: 86.0MB). Free memory was 103.9MB in the beginning and 176.8MB in the end (delta: -72.9MB). Peak memory consumption was 15.1MB. Max. memory is 16.1GB. [2022-11-20 12:49:07,170 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 136.3MB. Free memory is still 104.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 12:49:07,171 INFO L158 Benchmark]: CACSL2BoogieTranslator took 278.17ms. Allocated memory is still 136.3MB. Free memory was 103.9MB in the beginning and 94.8MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-20 12:49:07,171 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.51ms. Allocated memory is still 136.3MB. Free memory was 94.8MB in the beginning and 93.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 12:49:07,172 INFO L158 Benchmark]: Boogie Preprocessor took 22.90ms. Allocated memory is still 136.3MB. Free memory was 93.6MB in the beginning and 92.7MB in the end (delta: 859.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 12:49:07,172 INFO L158 Benchmark]: RCFGBuilder took 351.77ms. Allocated memory is still 136.3MB. Free memory was 92.7MB in the beginning and 83.5MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 12:49:07,172 INFO L158 Benchmark]: BuchiAutomizer took 21239.85ms. Allocated memory was 136.3MB in the beginning and 222.3MB in the end (delta: 86.0MB). Free memory was 83.5MB in the beginning and 176.8MB in the end (delta: -93.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 12:49:07,173 INFO L158 Benchmark]: Witness Printer took 4.80ms. Allocated memory is still 222.3MB. Free memory is still 176.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 12:49:07,175 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 136.3MB. Free memory is still 104.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 278.17ms. Allocated memory is still 136.3MB. Free memory was 103.9MB in the beginning and 94.8MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.51ms. Allocated memory is still 136.3MB. Free memory was 94.8MB in the beginning and 93.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.90ms. Allocated memory is still 136.3MB. Free memory was 93.6MB in the beginning and 92.7MB in the end (delta: 859.8kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 351.77ms. Allocated memory is still 136.3MB. Free memory was 92.7MB in the beginning and 83.5MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * BuchiAutomizer took 21239.85ms. Allocated memory was 136.3MB in the beginning and 222.3MB in the end (delta: 86.0MB). Free memory was 83.5MB in the beginning and 176.8MB in the end (delta: -93.3MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 4.80ms. Allocated memory is still 222.3MB. Free memory is still 176.8MB. 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 12 terminating modules (5 trivial, 5 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(j) and consists of 11 locations. One deterministic module has affine ranking function \old(i) and consists of 4 locations. One deterministic module has affine ranking function \old(i) and consists of 5 locations. One deterministic module has affine ranking function org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@b989658 and consists of 11 locations. One deterministic module has affine ranking function i and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 15 locations. 5 modules have a trivial ranking function, the largest among these consists of 13 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 21.1s and 9 iterations. TraceHistogramMax:5. Analysis of lassos took 11.9s. Construction of modules took 1.3s. Büchi inclusion checks took 7.3s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 11. Automata minimization 0.3s AutomataMinimizationTime, 11 MinimizatonAttempts, 249 StatesRemovedByMinimization, 11 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [5, 0, 1, 1, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 38/58 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 381 SdHoareTripleChecker+Valid, 1.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 354 mSDsluCounter, 792 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 490 mSDsCounter, 313 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1072 IncrementalHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 313 mSolverCounterUnsat, 302 mSDtfsCounter, 1072 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT3 conc0 concLT3 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital13 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq150 hnf93 smp100 dnf100 smp100 tf111 neg95 sie110 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 37ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 18 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 7 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 5.8s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2022-11-20 12:49:07,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-11-20 12:49:07,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-11-20 12:49:07,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-11-20 12:49:07,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-11-20 12:49:07,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b70dd1e4-3985-4083-8825-56ca23aa1ce8/bin/uautomizer-ug76WZFUDN/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