./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 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 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-38b53e6 [2022-11-25 15:49:29,239 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:49:29,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:49:29,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:49:29,272 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:49:29,275 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:49:29,278 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:49:29,283 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:49:29,286 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:49:29,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:49:29,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:49:29,292 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:49:29,294 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:49:29,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:49:29,301 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:49:29,303 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:49:29,304 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:49:29,311 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:49:29,313 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:49:29,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:49:29,323 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:49:29,325 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:49:29,327 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:49:29,329 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:49:29,333 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:49:29,339 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:49:29,340 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:49:29,341 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:49:29,343 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:49:29,345 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:49:29,346 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:49:29,347 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:49:29,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:49:29,351 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:49:29,353 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:49:29,356 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:49:29,357 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:49:29,358 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:49:29,358 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:49:29,361 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:49:29,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:49:29,363 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Termination-64bit-Automizer_Default.epf [2022-11-25 15:49:29,415 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:49:29,419 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:49:29,420 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:49:29,420 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:49:29,422 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:49:29,422 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:49:29,422 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:49:29,423 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-11-25 15:49:29,423 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-11-25 15:49:29,423 INFO L138 SettingsManager]: * Use old map elimination=false [2022-11-25 15:49:29,425 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-11-25 15:49:29,425 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-11-25 15:49:29,425 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-11-25 15:49:29,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:49:29,426 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 15:49:29,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:49:29,426 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:49:29,427 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-11-25 15:49:29,427 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-11-25 15:49:29,427 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-11-25 15:49:29,427 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 15:49:29,428 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-11-25 15:49:29,428 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:49:29,428 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-11-25 15:49:29,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:49:29,429 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:49:29,429 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:49:29,430 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:49:29,435 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-11-25 15:49:29,435 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9948dbd77aeb2de72e0bd3a3a4e22b1606b19383e4631af58adbec46ed909b6c [2022-11-25 15:49:29,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:49:29,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:49:29,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:49:29,922 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:49:29,922 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:49:29,924 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c [2022-11-25 15:49:33,717 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:49:33,999 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:49:33,999 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c [2022-11-25 15:49:34,008 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/data/8b4f0be9c/41fbed263a7d4936b0c89128a5021e57/FLAGef47eef62 [2022-11-25 15:49:34,040 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/data/8b4f0be9c/41fbed263a7d4936b0c89128a5021e57 [2022-11-25 15:49:34,044 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:49:34,050 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:49:34,054 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:49:34,054 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:49:34,059 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:49:34,060 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:49:34" (1/1) ... [2022-11-25 15:49:34,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f71b6d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:49:34, skipping insertion in model container [2022-11-25 15:49:34,062 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:49:34" (1/1) ... [2022-11-25 15:49:34,072 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:49:34,091 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:49:34,276 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:49:34,282 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:49:34,299 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:49:34,315 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:49:34,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:49:34 WrapperNode [2022-11-25 15:49:34,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:49:34,317 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:49:34,317 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:49:34,317 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:49:34,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:49:34" (1/1) ... [2022-11-25 15:49:34,335 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:49:34" (1/1) ... [2022-11-25 15:49:34,356 INFO L138 Inliner]: procedures = 6, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 6 [2022-11-25 15:49:34,357 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:49:34,358 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:49:34,358 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:49:34,358 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:49:34,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:49:34" (1/1) ... [2022-11-25 15:49:34,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:49:34" (1/1) ... [2022-11-25 15:49:34,369 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:49:34" (1/1) ... [2022-11-25 15:49:34,369 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:49:34" (1/1) ... [2022-11-25 15:49:34,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:49:34" (1/1) ... [2022-11-25 15:49:34,374 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:49:34" (1/1) ... [2022-11-25 15:49:34,375 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:49:34" (1/1) ... [2022-11-25 15:49:34,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:49:34" (1/1) ... [2022-11-25 15:49:34,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:49:34,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:49:34,378 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:49:34,378 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:49:34,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:49:34" (1/1) ... [2022-11-25 15:49:34,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:34,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:34,419 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:34,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2022-11-25 15:49:34,474 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2022-11-25 15:49:34,474 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2022-11-25 15:49:34,475 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2022-11-25 15:49:34,475 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2022-11-25 15:49:34,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:49:34,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:49:34,547 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:49:34,549 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:49:34,674 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:49:34,685 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:49:34,685 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-25 15:49:34,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:49:34 BoogieIcfgContainer [2022-11-25 15:49:34,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:49:34,690 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-11-25 15:49:34,690 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-11-25 15:49:34,695 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-11-25 15:49:34,697 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-25 15:49:34,697 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 25.11 03:49:34" (1/3) ... [2022-11-25 15:49:34,699 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1c703e70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 25.11 03:49:34, skipping insertion in model container [2022-11-25 15:49:34,699 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-25 15:49:34,699 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:49:34" (2/3) ... [2022-11-25 15:49:34,700 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1c703e70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 25.11 03:49:34, skipping insertion in model container [2022-11-25 15:49:34,700 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-25 15:49:34,700 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:49:34" (3/3) ... [2022-11-25 15:49:34,703 INFO L332 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1b.c [2022-11-25 15:49:34,802 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2022-11-25 15:49:34,803 INFO L304 stractBuchiCegarLoop]: Hoare is false [2022-11-25 15:49:34,803 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-11-25 15:49:34,803 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-11-25 15:49:34,804 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-11-25 15:49:34,804 INFO L308 stractBuchiCegarLoop]: Difference is false [2022-11-25 15:49:34,804 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-11-25 15:49:34,804 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2022-11-25 15:49:34,811 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) [2022-11-25 15:49:34,844 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-11-25 15:49:34,845 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-25 15:49:34,845 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-25 15:49:34,854 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-11-25 15:49:34,855 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:49:34,855 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2022-11-25 15:49:34,855 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) [2022-11-25 15:49:34,860 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-11-25 15:49:34,860 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-25 15:49:34,860 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-25 15:49:34,861 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-11-25 15:49:34,862 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:49:34,872 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 [2022-11-25 15:49:34,873 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 [2022-11-25 15:49:34,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:34,881 INFO L85 PathProgramCache]: Analyzing trace with hash 48738, now seen corresponding path program 1 times [2022-11-25 15:49:34,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:34,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585541900] [2022-11-25 15:49:34,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:34,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:35,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:49:35,021 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:49:35,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:49:35,047 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:49:35,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:35,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1074209557, now seen corresponding path program 1 times [2022-11-25 15:49:35,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:35,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200135233] [2022-11-25 15:49:35,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:35,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:49:35,076 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:49:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:49:35,087 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:49:35,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:35,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1203131828, now seen corresponding path program 1 times [2022-11-25 15:49:35,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:35,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841521887] [2022-11-25 15:49:35,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:35,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:49:35,106 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:49:35,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:49:35,120 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:49:35,375 INFO L210 LassoAnalysis]: Preferences: [2022-11-25 15:49:35,376 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-25 15:49:35,376 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-25 15:49:35,376 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-25 15:49:35,377 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-25 15:49:35,377 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:35,377 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-25 15:49:35,377 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-25 15:49:35,378 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration1_Loop [2022-11-25 15:49:35,378 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-25 15:49:35,378 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-25 15:49:35,400 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:35,414 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:35,422 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:35,426 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:35,446 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:35,523 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-25 15:49:35,524 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-25 15:49:35,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:35,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:35,534 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:35,544 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-25 15:49:35,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2022-11-25 15:49:35,544 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 15:49:35,573 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-25 15:49:35,574 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_~j=0} Honda state: {rec2_~j=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-25 15:49:35,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:35,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:35,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:35,588 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:35,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2022-11-25 15:49:35,599 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-25 15:49:35,599 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 15:49:35,635 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-25 15:49:35,635 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#res=0} Honda state: {rec2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-25 15:49:35,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:35,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:35,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:35,651 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:35,660 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-25 15:49:35,660 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 15:49:35,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2022-11-25 15:49:35,695 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-25 15:49:35,695 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret4=0} Honda state: {rec2_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-25 15:49:35,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:35,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:35,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:35,714 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:35,720 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-25 15:49:35,720 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 15:49:35,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2022-11-25 15:49:35,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:35,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:35,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:35,774 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:35,783 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-25 15:49:35,783 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 15:49:35,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2022-11-25 15:49:35,818 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-25 15:49:35,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:35,823 INFO L210 LassoAnalysis]: Preferences: [2022-11-25 15:49:35,824 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-25 15:49:35,824 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-25 15:49:35,824 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-25 15:49:35,824 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-25 15:49:35,824 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:35,824 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-25 15:49:35,824 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-25 15:49:35,825 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration1_Loop [2022-11-25 15:49:35,825 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-25 15:49:35,825 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-25 15:49:35,827 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:35,834 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:35,840 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:35,848 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:35,874 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:35,936 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-25 15:49:35,943 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-25 15:49:35,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:35,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:35,948 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:35,956 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-25 15:49:35,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2022-11-25 15:49:35,973 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-25 15:49:35,974 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-25 15:49:35,976 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-25 15:49:35,976 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-25 15:49:35,976 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-25 15:49:35,980 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-25 15:49:35,981 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-25 15:49:35,991 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-25 15:49:36,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:36,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:36,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:36,005 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:36,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2022-11-25 15:49:36,015 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-25 15:49:36,035 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-25 15:49:36,036 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-25 15:49:36,036 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-25 15:49:36,036 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-25 15:49:36,036 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-25 15:49:36,037 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-25 15:49:36,038 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-25 15:49:36,048 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-25 15:49:36,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:36,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:36,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:36,061 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:36,072 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-25 15:49:36,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2022-11-25 15:49:36,089 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-25 15:49:36,090 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-25 15:49:36,090 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-25 15:49:36,090 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-25 15:49:36,090 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-25 15:49:36,093 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-25 15:49:36,093 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-25 15:49:36,110 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-25 15:49:36,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:36,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:36,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:36,124 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:36,136 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-25 15:49:36,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2022-11-25 15:49:36,151 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-25 15:49:36,152 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-25 15:49:36,152 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-25 15:49:36,152 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-25 15:49:36,152 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-25 15:49:36,157 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-25 15:49:36,157 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-25 15:49:36,174 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-25 15:49:36,183 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-11-25 15:49:36,184 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-11-25 15:49:36,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:36,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:36,223 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:36,234 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-25 15:49:36,234 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-25 15:49:36,234 INFO L513 LassoAnalysis]: Proved termination. [2022-11-25 15:49:36,235 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2022-11-25 15:49:36,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2022-11-25 15:49:36,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:36,244 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-25 15:49:36,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:36,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:36,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 15:49:36,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:36,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:36,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 15:49:36,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:36,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:36,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:49:36,566 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 [2022-11-25 15:49:36,569 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) [2022-11-25 15:49:37,323 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. [2022-11-25 15:49:37,327 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 [2022-11-25 15:49:37,332 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) [2022-11-25 15:49:37,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 58 transitions. [2022-11-25 15:49:37,336 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 58 transitions. Stem has 3 letters. Loop has 8 letters. [2022-11-25 15:49:37,339 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 15:49:37,339 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 58 transitions. Stem has 11 letters. Loop has 8 letters. [2022-11-25 15:49:37,340 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 15:49:37,340 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 58 transitions. Stem has 3 letters. Loop has 16 letters. [2022-11-25 15:49:37,341 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 15:49:37,342 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 195 states and 280 transitions. [2022-11-25 15:49:37,355 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-11-25 15:49:37,365 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 195 states to 83 states and 121 transitions. [2022-11-25 15:49:37,366 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 36 [2022-11-25 15:49:37,367 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 39 [2022-11-25 15:49:37,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 121 transitions. [2022-11-25 15:49:37,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-25 15:49:37,369 INFO L218 hiAutomatonCegarLoop]: Abstraction has 83 states and 121 transitions. [2022-11-25 15:49:37,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states and 121 transitions. [2022-11-25 15:49:37,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2022-11-25 15:49:37,418 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) [2022-11-25 15:49:37,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 84 transitions. [2022-11-25 15:49:37,421 INFO L240 hiAutomatonCegarLoop]: Abstraction has 56 states and 84 transitions. [2022-11-25 15:49:37,421 INFO L428 stractBuchiCegarLoop]: Abstraction has 56 states and 84 transitions. [2022-11-25 15:49:37,422 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2022-11-25 15:49:37,422 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 56 states and 84 transitions. [2022-11-25 15:49:37,423 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-11-25 15:49:37,424 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-25 15:49:37,424 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-25 15:49:37,425 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:49:37,425 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-11-25 15:49:37,425 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 [2022-11-25 15:49:37,425 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 [2022-11-25 15:49:37,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:37,426 INFO L85 PathProgramCache]: Analyzing trace with hash 838970620, now seen corresponding path program 1 times [2022-11-25 15:49:37,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:37,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852056823] [2022-11-25 15:49:37,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:37,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:37,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:49:37,438 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:49:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:49:37,446 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:49:37,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:37,448 INFO L85 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 1 times [2022-11-25 15:49:37,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:37,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115417911] [2022-11-25 15:49:37,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:37,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:37,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:49:37,454 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:49:37,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:49:37,459 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:49:37,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:37,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1359045147, now seen corresponding path program 2 times [2022-11-25 15:49:37,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:37,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742693917] [2022-11-25 15:49:37,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:37,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:37,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:49:37,470 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:49:37,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:49:37,480 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:49:37,520 INFO L210 LassoAnalysis]: Preferences: [2022-11-25 15:49:37,520 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-25 15:49:37,520 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-25 15:49:37,521 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-25 15:49:37,521 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-25 15:49:37,521 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:37,521 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-25 15:49:37,521 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-25 15:49:37,521 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration2_Loop [2022-11-25 15:49:37,522 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-25 15:49:37,522 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-25 15:49:37,523 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:37,526 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:37,529 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:37,532 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:37,535 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:37,538 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:37,579 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-25 15:49:37,579 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-25 15:49:37,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:37,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:37,581 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:37,586 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-25 15:49:37,587 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 15:49:37,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2022-11-25 15:49:37,613 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-25 15:49:37,613 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-25 15:49:37,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:37,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:37,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:37,626 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:37,637 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-25 15:49:37,637 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 15:49:37,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2022-11-25 15:49:37,663 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-25 15:49:37,664 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-25 15:49:37,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:37,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:37,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:37,676 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:37,689 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-25 15:49:37,689 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 15:49:37,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2022-11-25 15:49:37,704 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-25 15:49:37,705 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-25 15:49:37,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:37,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:37,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:37,713 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:37,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2022-11-25 15:49:37,719 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-25 15:49:37,720 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 15:49:37,751 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-25 15:49:37,751 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-25 15:49:37,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:37,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:37,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:37,758 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:37,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2022-11-25 15:49:37,761 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-25 15:49:37,761 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 15:49:37,777 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-25 15:49:37,777 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-25 15:49:37,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:37,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:37,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:37,785 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:37,796 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-25 15:49:37,796 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 15:49:37,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2022-11-25 15:49:37,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:37,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:37,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:37,845 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:37,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2022-11-25 15:49:37,853 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-25 15:49:37,853 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 15:49:37,969 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-25 15:49:37,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:37,984 INFO L210 LassoAnalysis]: Preferences: [2022-11-25 15:49:37,984 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-25 15:49:37,984 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-25 15:49:37,985 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-25 15:49:37,985 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-25 15:49:37,985 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:37,985 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-25 15:49:37,985 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-25 15:49:37,985 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration2_Loop [2022-11-25 15:49:37,985 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-25 15:49:37,985 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-25 15:49:37,987 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:37,999 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:38,002 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:38,008 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:38,011 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:38,019 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:38,067 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-25 15:49:38,067 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-25 15:49:38,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:38,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:38,069 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:38,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2022-11-25 15:49:38,082 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-25 15:49:38,099 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-25 15:49:38,099 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-25 15:49:38,099 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-25 15:49:38,099 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-25 15:49:38,099 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-25 15:49:38,101 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-25 15:49:38,101 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-25 15:49:38,118 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-25 15:49:38,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:38,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:38,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:38,129 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:38,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2022-11-25 15:49:38,139 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-25 15:49:38,156 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-25 15:49:38,156 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-25 15:49:38,156 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-25 15:49:38,156 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-25 15:49:38,156 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-25 15:49:38,157 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-25 15:49:38,158 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-25 15:49:38,167 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-25 15:49:38,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:38,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:38,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:38,180 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:38,191 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-25 15:49:38,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2022-11-25 15:49:38,208 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-25 15:49:38,208 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-25 15:49:38,209 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-25 15:49:38,209 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-25 15:49:38,209 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-25 15:49:38,210 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-25 15:49:38,210 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-25 15:49:38,238 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-25 15:49:38,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:38,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:38,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:38,246 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:38,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2022-11-25 15:49:38,250 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-25 15:49:38,267 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-25 15:49:38,267 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-25 15:49:38,267 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-25 15:49:38,267 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-25 15:49:38,267 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-25 15:49:38,268 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-25 15:49:38,269 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-25 15:49:38,286 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-25 15:49:38,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:38,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:38,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:38,298 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:38,303 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-25 15:49:38,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2022-11-25 15:49:38,319 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-25 15:49:38,319 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-25 15:49:38,320 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-25 15:49:38,320 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-25 15:49:38,320 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-25 15:49:38,324 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-25 15:49:38,324 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-25 15:49:38,345 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-25 15:49:38,349 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2022-11-25 15:49:38,350 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-11-25 15:49:38,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:38,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:38,351 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:38,360 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-25 15:49:38,360 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-25 15:49:38,360 INFO L513 LassoAnalysis]: Proved termination. [2022-11-25 15:49:38,360 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2022-11-25 15:49:38,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2022-11-25 15:49:38,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:38,366 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-25 15:49:38,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:38,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:38,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 15:49:38,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:38,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 15:49:38,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:38,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:49:38,579 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2022-11-25 15:49:38,579 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) [2022-11-25 15:49:38,673 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. [2022-11-25 15:49:38,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2022-11-25 15:49:38,679 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) [2022-11-25 15:49:38,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 18 transitions. [2022-11-25 15:49:38,680 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 18 transitions. Stem has 9 letters. Loop has 3 letters. [2022-11-25 15:49:38,680 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 15:49:38,680 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 18 transitions. Stem has 12 letters. Loop has 3 letters. [2022-11-25 15:49:38,680 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 15:49:38,681 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 18 transitions. Stem has 9 letters. Loop has 6 letters. [2022-11-25 15:49:38,681 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 15:49:38,681 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 106 states and 150 transitions. [2022-11-25 15:49:38,685 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-11-25 15:49:38,695 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 106 states to 94 states and 138 transitions. [2022-11-25 15:49:38,695 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 38 [2022-11-25 15:49:38,696 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 40 [2022-11-25 15:49:38,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 138 transitions. [2022-11-25 15:49:38,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-25 15:49:38,697 INFO L218 hiAutomatonCegarLoop]: Abstraction has 94 states and 138 transitions. [2022-11-25 15:49:38,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states and 138 transitions. [2022-11-25 15:49:38,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2022-11-25 15:49:38,710 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) [2022-11-25 15:49:38,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 130 transitions. [2022-11-25 15:49:38,713 INFO L240 hiAutomatonCegarLoop]: Abstraction has 90 states and 130 transitions. [2022-11-25 15:49:38,713 INFO L428 stractBuchiCegarLoop]: Abstraction has 90 states and 130 transitions. [2022-11-25 15:49:38,713 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2022-11-25 15:49:38,714 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 90 states and 130 transitions. [2022-11-25 15:49:38,716 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-11-25 15:49:38,716 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-25 15:49:38,716 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-25 15:49:38,717 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:49:38,718 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-11-25 15:49:38,718 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 [2022-11-25 15:49:38,718 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 [2022-11-25 15:49:38,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:38,719 INFO L85 PathProgramCache]: Analyzing trace with hash 372282091, now seen corresponding path program 1 times [2022-11-25 15:49:38,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:38,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126746057] [2022-11-25 15:49:38,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:38,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:38,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:49:38,731 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:49:38,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:49:38,741 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:49:38,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:38,742 INFO L85 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 2 times [2022-11-25 15:49:38,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:38,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660909739] [2022-11-25 15:49:38,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:38,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:38,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:49:38,748 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:49:38,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:49:38,753 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:49:38,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:38,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1050214860, now seen corresponding path program 2 times [2022-11-25 15:49:38,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:38,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094402397] [2022-11-25 15:49:38,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:38,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:38,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:38,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 15:49:38,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:38,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:49:38,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:49:38,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094402397] [2022-11-25 15:49:38,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094402397] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:49:38,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:49:38,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 15:49:38,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030241963] [2022-11-25 15:49:38,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:49:38,956 INFO L210 LassoAnalysis]: Preferences: [2022-11-25 15:49:38,956 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-25 15:49:38,957 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-25 15:49:38,957 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-25 15:49:38,957 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-25 15:49:38,957 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:38,957 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-25 15:49:38,957 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-25 15:49:38,958 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration3_Loop [2022-11-25 15:49:38,958 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-25 15:49:38,958 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-25 15:49:38,962 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:38,967 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:38,976 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:38,979 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:38,984 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:38,988 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:39,038 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-25 15:49:39,038 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-25 15:49:39,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:39,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:39,046 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:39,051 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-25 15:49:39,051 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 15:49:39,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2022-11-25 15:49:39,095 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-25 15:49:39,095 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-25 15:49:39,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Ended with exit code 0 [2022-11-25 15:49:39,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:39,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:39,102 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:39,116 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-25 15:49:39,116 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 15:49:39,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2022-11-25 15:49:39,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:39,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:39,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:39,166 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:39,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Ended with exit code 0 [2022-11-25 15:49:39,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2022-11-25 15:49:39,194 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-25 15:49:39,194 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 15:49:39,315 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-25 15:49:39,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:39,327 INFO L210 LassoAnalysis]: Preferences: [2022-11-25 15:49:39,327 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-25 15:49:39,327 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-25 15:49:39,328 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-25 15:49:39,328 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-25 15:49:39,328 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:39,328 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-25 15:49:39,328 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-25 15:49:39,328 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration3_Loop [2022-11-25 15:49:39,328 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-25 15:49:39,328 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-25 15:49:39,330 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:39,334 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:39,341 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:39,344 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:39,347 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:39,350 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:39,392 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-25 15:49:39,392 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-25 15:49:39,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:39,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:39,394 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:39,402 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-25 15:49:39,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2022-11-25 15:49:39,418 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-25 15:49:39,418 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-25 15:49:39,418 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-25 15:49:39,418 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-25 15:49:39,418 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-25 15:49:39,419 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-25 15:49:39,419 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-25 15:49:39,428 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-25 15:49:39,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:39,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:39,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:39,440 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:39,449 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-25 15:49:39,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2022-11-25 15:49:39,464 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-25 15:49:39,465 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-25 15:49:39,465 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-25 15:49:39,465 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-25 15:49:39,465 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-25 15:49:39,476 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-25 15:49:39,476 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-25 15:49:39,494 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-25 15:49:39,497 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2022-11-25 15:49:39,497 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-11-25 15:49:39,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:39,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:39,499 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:39,508 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-25 15:49:39,508 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-25 15:49:39,508 INFO L513 LassoAnalysis]: Proved termination. [2022-11-25 15:49:39,508 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2022-11-25 15:49:39,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2022-11-25 15:49:39,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:39,519 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-25 15:49:39,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:39,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:39,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 15:49:39,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:39,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:39,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 15:49:39,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:39,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:49:39,725 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2022-11-25 15:49:39,725 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) [2022-11-25 15:49:39,858 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. [2022-11-25 15:49:39,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2022-11-25 15:49:39,860 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) [2022-11-25 15:49:39,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2022-11-25 15:49:39,861 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 14 letters. Loop has 3 letters. [2022-11-25 15:49:39,861 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 15:49:39,861 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 17 letters. Loop has 3 letters. [2022-11-25 15:49:39,862 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 15:49:39,862 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 14 letters. Loop has 6 letters. [2022-11-25 15:49:39,862 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 15:49:39,863 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 194 transitions. [2022-11-25 15:49:39,867 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-11-25 15:49:39,875 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 123 states and 182 transitions. [2022-11-25 15:49:39,882 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 49 [2022-11-25 15:49:39,884 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 51 [2022-11-25 15:49:39,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 123 states and 182 transitions. [2022-11-25 15:49:39,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-25 15:49:39,884 INFO L218 hiAutomatonCegarLoop]: Abstraction has 123 states and 182 transitions. [2022-11-25 15:49:39,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states and 182 transitions. [2022-11-25 15:49:39,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 114. [2022-11-25 15:49:39,897 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) [2022-11-25 15:49:39,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 166 transitions. [2022-11-25 15:49:39,908 INFO L240 hiAutomatonCegarLoop]: Abstraction has 114 states and 166 transitions. [2022-11-25 15:49:39,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:49:39,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 15:49:39,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 15:49:39,913 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) [2022-11-25 15:49:40,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:49:40,015 INFO L93 Difference]: Finished difference Result 124 states and 176 transitions. [2022-11-25 15:49:40,016 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 124 states and 176 transitions. [2022-11-25 15:49:40,030 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2022-11-25 15:49:40,039 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 124 states to 122 states and 174 transitions. [2022-11-25 15:49:40,040 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 56 [2022-11-25 15:49:40,040 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 56 [2022-11-25 15:49:40,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 174 transitions. [2022-11-25 15:49:40,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-25 15:49:40,041 INFO L218 hiAutomatonCegarLoop]: Abstraction has 122 states and 174 transitions. [2022-11-25 15:49:40,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states and 174 transitions. [2022-11-25 15:49:40,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 102. [2022-11-25 15:49:40,059 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) [2022-11-25 15:49:40,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 144 transitions. [2022-11-25 15:49:40,062 INFO L240 hiAutomatonCegarLoop]: Abstraction has 102 states and 144 transitions. [2022-11-25 15:49:40,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:49:40,066 INFO L428 stractBuchiCegarLoop]: Abstraction has 102 states and 144 transitions. [2022-11-25 15:49:40,067 INFO L335 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2022-11-25 15:49:40,067 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 102 states and 144 transitions. [2022-11-25 15:49:40,070 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2022-11-25 15:49:40,070 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-25 15:49:40,070 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-25 15:49:40,074 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:49:40,074 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 15:49:40,074 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 [2022-11-25 15:49:40,074 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 [2022-11-25 15:49:40,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:40,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1325197585, now seen corresponding path program 1 times [2022-11-25 15:49:40,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:40,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427490466] [2022-11-25 15:49:40,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:40,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:40,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:49:40,091 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:49:40,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:49:40,117 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:49:40,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:40,118 INFO L85 PathProgramCache]: Analyzing trace with hash 949089090, now seen corresponding path program 1 times [2022-11-25 15:49:40,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:40,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445601821] [2022-11-25 15:49:40,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:40,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:40,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-25 15:49:40,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:40,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 15:49:40,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:40,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:49:40,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:49:40,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445601821] [2022-11-25 15:49:40,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445601821] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:49:40,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736733230] [2022-11-25 15:49:40,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:40,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:49:40,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:40,222 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:49:40,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-25 15:49:40,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:40,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 15:49:40,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:40,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:49:40,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:49:40,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736733230] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:49:40,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:49:40,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2022-11-25 15:49:40,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777459919] [2022-11-25 15:49:40,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:49:40,294 INFO L765 eck$LassoCheckResult]: loop already infeasible [2022-11-25 15:49:40,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:49:40,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 15:49:40,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 15:49:40,300 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) [2022-11-25 15:49:40,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:49:40,383 INFO L93 Difference]: Finished difference Result 118 states and 162 transitions. [2022-11-25 15:49:40,383 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 118 states and 162 transitions. [2022-11-25 15:49:40,389 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-11-25 15:49:40,400 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 118 states to 118 states and 162 transitions. [2022-11-25 15:49:40,400 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 54 [2022-11-25 15:49:40,400 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 54 [2022-11-25 15:49:40,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 118 states and 162 transitions. [2022-11-25 15:49:40,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-25 15:49:40,401 INFO L218 hiAutomatonCegarLoop]: Abstraction has 118 states and 162 transitions. [2022-11-25 15:49:40,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states and 162 transitions. [2022-11-25 15:49:40,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2022-11-25 15:49:40,411 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) [2022-11-25 15:49:40,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 158 transitions. [2022-11-25 15:49:40,413 INFO L240 hiAutomatonCegarLoop]: Abstraction has 114 states and 158 transitions. [2022-11-25 15:49:40,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:49:40,414 INFO L428 stractBuchiCegarLoop]: Abstraction has 114 states and 158 transitions. [2022-11-25 15:49:40,415 INFO L335 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2022-11-25 15:49:40,415 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 114 states and 158 transitions. [2022-11-25 15:49:40,416 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-11-25 15:49:40,416 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-25 15:49:40,417 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-25 15:49:40,418 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:49:40,418 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:49:40,419 INFO L748 eck$LassoCheckResult]: Stem: 1426#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 1427#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 1420#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 1443#rec2ENTRY ~j := #in~j; 1486#L18 assume !(~j <= 0); 1429#L20 call #t~ret3 := rec1(~j - 1);< 1485#rec1ENTRY ~i := #in~i; 1484#L12 assume !(~i <= 0); 1474#L14 call #t~ret0 := rec1(~i - 2);< 1481#rec1ENTRY ~i := #in~i; 1482#L12 assume ~i <= 0;#res := 0; 1527#rec1FINAL assume true; 1523#rec1EXIT >#28#return; 1448#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1449#rec1ENTRY ~i := #in~i; 1532#L12 assume ~i <= 0;#res := 0; 1530#rec1FINAL assume true; 1457#rec1EXIT >#30#return; 1444#L14-2 call #t~ret2 := rec1(#t~ret1);< 1445#rec1ENTRY ~i := #in~i; 1462#L12 assume ~i <= 0;#res := 0; 1452#rec1FINAL assume true; 1454#rec1EXIT >#32#return; 1428#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 1431#rec1FINAL assume true; 1478#rec1EXIT >#34#return; 1419#L20-1 [2022-11-25 15:49:40,419 INFO L750 eck$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 [2022-11-25 15:49:40,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:40,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1231361643, now seen corresponding path program 1 times [2022-11-25 15:49:40,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:40,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431044192] [2022-11-25 15:49:40,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:40,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:40,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:49:40,432 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:49:40,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:49:40,443 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:49:40,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:40,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1591101301, now seen corresponding path program 1 times [2022-11-25 15:49:40,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:40,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453868504] [2022-11-25 15:49:40,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:40,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:40,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:49:40,454 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:49:40,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:49:40,464 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:49:40,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:40,465 INFO L85 PathProgramCache]: Analyzing trace with hash 774680821, now seen corresponding path program 1 times [2022-11-25 15:49:40,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:40,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526685563] [2022-11-25 15:49:40,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:40,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:40,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:40,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-25 15:49:40,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:40,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:49:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:40,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 15:49:40,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:40,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 15:49:40,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:40,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-25 15:49:40,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:40,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:49:40,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:40,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 15:49:40,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:40,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 15:49:40,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:40,781 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-25 15:49:40,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:49:40,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526685563] [2022-11-25 15:49:40,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526685563] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:49:40,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010923635] [2022-11-25 15:49:40,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:40,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:49:40,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:40,787 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:49:40,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-25 15:49:40,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:40,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 15:49:40,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:40,965 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-25 15:49:40,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:49:41,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:41,261 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-25 15:49:41,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010923635] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:49:41,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:49:41,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 12 [2022-11-25 15:49:41,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715542356] [2022-11-25 15:49:41,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:49:41,635 INFO L210 LassoAnalysis]: Preferences: [2022-11-25 15:49:41,635 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-25 15:49:41,635 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-25 15:49:41,635 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-25 15:49:41,636 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-25 15:49:41,636 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:41,636 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-25 15:49:41,636 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-25 15:49:41,636 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration5_Loop [2022-11-25 15:49:41,636 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-25 15:49:41,636 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-25 15:49:41,637 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:41,650 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:41,653 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:41,696 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-25 15:49:41,697 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-25 15:49:41,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:41,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:41,705 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:41,715 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-25 15:49:41,716 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 15:49:41,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2022-11-25 15:49:41,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:41,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:41,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:41,754 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:41,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2022-11-25 15:49:41,759 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-25 15:49:41,759 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 15:49:44,272 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-25 15:49:44,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:44,277 INFO L210 LassoAnalysis]: Preferences: [2022-11-25 15:49:44,277 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-25 15:49:44,277 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-25 15:49:44,277 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-25 15:49:44,277 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-25 15:49:44,277 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:44,277 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-25 15:49:44,277 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-25 15:49:44,278 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration5_Loop [2022-11-25 15:49:44,278 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-25 15:49:44,278 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-25 15:49:44,279 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:44,299 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:44,302 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:44,351 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-25 15:49:44,351 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-25 15:49:44,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:44,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:44,353 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:44,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2022-11-25 15:49:44,361 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-25 15:49:44,378 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-25 15:49:44,378 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-25 15:49:44,378 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-25 15:49:44,378 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-25 15:49:44,378 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-25 15:49:44,383 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-25 15:49:44,383 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-25 15:49:44,398 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-25 15:49:44,413 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-11-25 15:49:44,413 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-11-25 15:49:44,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:44,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:44,418 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:44,420 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-25 15:49:44,420 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-25 15:49:44,420 INFO L513 LassoAnalysis]: Proved termination. [2022-11-25 15:49:44,420 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#t~ret3) = 1*rec2_#t~ret3 Supporting invariants [] [2022-11-25 15:49:44,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2022-11-25 15:49:44,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:44,431 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-25 15:49:44,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:44,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:44,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 15:49:44,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:44,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:44,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 15:49:44,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:45,166 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 15:49:45,167 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2022-11-25 15:49:45,167 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) [2022-11-25 15:49:45,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:45,773 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. [2022-11-25 15:49:45,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2022-11-25 15:49:45,777 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) [2022-11-25 15:49:45,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 53 transitions. [2022-11-25 15:49:45,779 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 53 transitions. Stem has 26 letters. Loop has 24 letters. [2022-11-25 15:49:45,781 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 15:49:45,781 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 53 transitions. Stem has 50 letters. Loop has 24 letters. [2022-11-25 15:49:45,784 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 15:49:45,784 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 53 transitions. Stem has 26 letters. Loop has 48 letters. [2022-11-25 15:49:45,786 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 15:49:45,787 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 585 states and 904 transitions. [2022-11-25 15:49:45,805 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2022-11-25 15:49:45,824 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 585 states to 433 states and 650 transitions. [2022-11-25 15:49:45,824 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 141 [2022-11-25 15:49:45,827 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 142 [2022-11-25 15:49:45,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 433 states and 650 transitions. [2022-11-25 15:49:45,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-25 15:49:45,827 INFO L218 hiAutomatonCegarLoop]: Abstraction has 433 states and 650 transitions. [2022-11-25 15:49:45,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states and 650 transitions. [2022-11-25 15:49:45,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 384. [2022-11-25 15:49:45,892 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) [2022-11-25 15:49:45,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 535 transitions. [2022-11-25 15:49:45,899 INFO L240 hiAutomatonCegarLoop]: Abstraction has 384 states and 535 transitions. [2022-11-25 15:49:45,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:49:45,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 15:49:45,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-25 15:49:45,900 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) [2022-11-25 15:49:46,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:49:46,177 INFO L93 Difference]: Finished difference Result 443 states and 646 transitions. [2022-11-25 15:49:46,177 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 443 states and 646 transitions. [2022-11-25 15:49:46,188 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2022-11-25 15:49:46,198 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 443 states to 350 states and 496 transitions. [2022-11-25 15:49:46,198 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 132 [2022-11-25 15:49:46,199 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 136 [2022-11-25 15:49:46,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 350 states and 496 transitions. [2022-11-25 15:49:46,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-25 15:49:46,199 INFO L218 hiAutomatonCegarLoop]: Abstraction has 350 states and 496 transitions. [2022-11-25 15:49:46,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states and 496 transitions. [2022-11-25 15:49:46,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 315. [2022-11-25 15:49:46,231 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) [2022-11-25 15:49:46,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 416 transitions. [2022-11-25 15:49:46,236 INFO L240 hiAutomatonCegarLoop]: Abstraction has 315 states and 416 transitions. [2022-11-25 15:49:46,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 15:49:46,239 INFO L428 stractBuchiCegarLoop]: Abstraction has 315 states and 416 transitions. [2022-11-25 15:49:46,240 INFO L335 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2022-11-25 15:49:46,240 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 315 states and 416 transitions. [2022-11-25 15:49:46,243 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2022-11-25 15:49:46,243 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-25 15:49:46,244 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-25 15:49:46,246 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] [2022-11-25 15:49:46,246 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-11-25 15:49:46,246 INFO L748 eck$LassoCheckResult]: Stem: 3565#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 3566#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 3561#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 3591#rec2ENTRY ~j := #in~j; 3658#L18 assume !(~j <= 0); 3655#L20 call #t~ret3 := rec1(~j - 1);< 3656#rec1ENTRY ~i := #in~i; 3672#L12 assume !(~i <= 0); 3662#L14 call #t~ret0 := rec1(~i - 2);< 3671#rec1ENTRY ~i := #in~i; 3678#L12 assume ~i <= 0;#res := 0; 3706#rec1FINAL assume true; 3705#rec1EXIT >#28#return; 3698#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 3699#rec1ENTRY ~i := #in~i; 3703#L12 assume ~i <= 0;#res := 0; 3702#rec1FINAL assume true; 3697#rec1EXIT >#30#return; 3690#L14-2 call #t~ret2 := rec1(#t~ret1);< 3695#rec1ENTRY ~i := #in~i; 3701#L12 assume ~i <= 0;#res := 0; 3696#rec1FINAL assume true; 3694#rec1EXIT >#32#return; 3692#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 3729#rec1FINAL assume true; 3726#rec1EXIT >#34#return; 3558#L20-1 call #t~ret4 := rec2(#t~ret3);< 3560#rec2ENTRY ~j := #in~j; 3745#L18 assume !(~j <= 0); 3723#L20 call #t~ret3 := rec1(~j - 1);< 3642#rec1ENTRY ~i := #in~i; 3744#L12 assume !(~i <= 0); 3568#L14 call #t~ret0 := rec1(~i - 2);< 3594#rec1ENTRY [2022-11-25 15:49:46,247 INFO L750 eck$LassoCheckResult]: Loop: 3594#rec1ENTRY ~i := #in~i; 3743#L12 assume !(~i <= 0); 3580#L14 call #t~ret0 := rec1(~i - 2);< 3594#rec1ENTRY [2022-11-25 15:49:46,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:46,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1565705522, now seen corresponding path program 2 times [2022-11-25 15:49:46,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:46,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119528657] [2022-11-25 15:49:46,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:46,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:46,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:46,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-25 15:49:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:46,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:49:46,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:46,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 15:49:46,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:46,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 15:49:46,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:46,538 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 15:49:46,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:49:46,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119528657] [2022-11-25 15:49:46,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119528657] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:49:46,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021319932] [2022-11-25 15:49:46,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:49:46,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:49:46,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:46,543 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:49:46,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-25 15:49:46,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:49:46,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:49:46,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 15:49:46,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:46,674 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 15:49:46,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:49:46,849 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 15:49:46,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021319932] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:49:46,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:49:46,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 10 [2022-11-25 15:49:46,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228247894] [2022-11-25 15:49:46,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:49:46,850 INFO L753 eck$LassoCheckResult]: stem already infeasible [2022-11-25 15:49:46,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:46,851 INFO L85 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 3 times [2022-11-25 15:49:46,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:46,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989630768] [2022-11-25 15:49:46,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:46,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:46,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:49:46,855 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:49:46,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:49:46,858 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:49:46,893 INFO L210 LassoAnalysis]: Preferences: [2022-11-25 15:49:46,893 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-25 15:49:46,894 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-25 15:49:46,894 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-25 15:49:46,894 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-25 15:49:46,894 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:46,894 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-25 15:49:46,894 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-25 15:49:46,895 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration6_Loop [2022-11-25 15:49:46,895 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-25 15:49:46,895 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-25 15:49:46,896 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:46,899 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:46,902 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:46,910 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:46,913 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:46,916 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:46,953 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-25 15:49:46,954 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-25 15:49:46,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:46,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:46,955 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:46,964 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-25 15:49:46,964 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 15:49:46,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2022-11-25 15:49:46,997 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-25 15:49:46,997 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-25 15:49:47,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:47,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:47,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:47,010 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:47,016 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-25 15:49:47,016 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 15:49:47,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2022-11-25 15:49:47,047 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-25 15:49:47,047 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-25 15:49:47,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:47,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:47,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:47,057 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:47,072 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-25 15:49:47,073 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 15:49:47,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2022-11-25 15:49:47,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:47,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:47,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:47,118 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:47,123 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-25 15:49:47,123 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 15:49:47,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2022-11-25 15:49:47,163 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-25 15:49:47,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:47,168 INFO L210 LassoAnalysis]: Preferences: [2022-11-25 15:49:47,168 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-25 15:49:47,168 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-25 15:49:47,168 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-25 15:49:47,169 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-25 15:49:47,169 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:47,169 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-25 15:49:47,169 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-25 15:49:47,169 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration6_Loop [2022-11-25 15:49:47,169 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-25 15:49:47,169 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-25 15:49:47,170 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:47,173 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:47,176 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:47,179 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:47,186 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:47,188 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:47,229 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-25 15:49:47,229 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-25 15:49:47,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:47,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:47,231 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:47,243 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-25 15:49:47,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2022-11-25 15:49:47,259 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-25 15:49:47,260 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-25 15:49:47,260 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-25 15:49:47,260 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-25 15:49:47,260 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-25 15:49:47,261 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-25 15:49:47,261 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-25 15:49:47,278 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-25 15:49:47,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:47,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:47,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:47,291 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:47,299 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-25 15:49:47,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2022-11-25 15:49:47,315 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-25 15:49:47,315 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-25 15:49:47,315 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-25 15:49:47,315 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-25 15:49:47,315 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-25 15:49:47,316 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-25 15:49:47,316 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-25 15:49:47,330 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-25 15:49:47,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:47,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:47,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:47,343 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:47,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Waiting until timeout for monitored process [2022-11-25 15:49:47,352 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-25 15:49:47,366 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-25 15:49:47,367 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-25 15:49:47,367 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-25 15:49:47,367 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-25 15:49:47,367 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-25 15:49:47,368 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-25 15:49:47,368 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-25 15:49:47,377 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-25 15:49:47,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:47,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:47,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:47,385 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:47,391 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-25 15:49:47,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Waiting until timeout for monitored process [2022-11-25 15:49:47,407 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-25 15:49:47,407 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-25 15:49:47,407 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-25 15:49:47,407 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-25 15:49:47,407 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-25 15:49:47,409 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-25 15:49:47,409 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-25 15:49:47,434 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-25 15:49:47,437 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2022-11-25 15:49:47,437 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-11-25 15:49:47,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:47,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:47,442 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:47,449 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-25 15:49:47,449 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-25 15:49:47,449 INFO L513 LassoAnalysis]: Proved termination. [2022-11-25 15:49:47,449 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2022-11-25 15:49:47,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Waiting until timeout for monitored process [2022-11-25 15:49:47,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:47,454 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-25 15:49:47,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:47,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:47,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 15:49:47,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:47,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:47,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:47,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 15:49:47,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:47,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:49:47,906 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2022-11-25 15:49:47,906 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) [2022-11-25 15:49:48,024 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. [2022-11-25 15:49:48,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2022-11-25 15:49:48,026 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) [2022-11-25 15:49:48,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 18 transitions. [2022-11-25 15:49:48,027 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 33 letters. Loop has 3 letters. [2022-11-25 15:49:48,027 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 15:49:48,027 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-11-25 15:49:48,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:48,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:48,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 15:49:48,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:48,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:48,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 15:49:48,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:48,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:49:48,486 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2022-11-25 15:49:48,486 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) [2022-11-25 15:49:48,586 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. [2022-11-25 15:49:48,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2022-11-25 15:49:48,588 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) [2022-11-25 15:49:48,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 18 transitions. [2022-11-25 15:49:48,589 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 33 letters. Loop has 3 letters. [2022-11-25 15:49:48,589 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 15:49:48,589 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-11-25 15:49:48,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:48,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:48,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 15:49:48,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:48,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:48,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 15:49:48,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:49,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:49:49,010 INFO L141 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2022-11-25 15:49:49,010 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) [2022-11-25 15:49:49,135 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. [2022-11-25 15:49:49,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2022-11-25 15:49:49,136 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) [2022-11-25 15:49:49,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 25 transitions. [2022-11-25 15:49:49,137 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 33 letters. Loop has 3 letters. [2022-11-25 15:49:49,137 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 15:49:49,137 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 36 letters. Loop has 3 letters. [2022-11-25 15:49:49,138 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 15:49:49,138 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 33 letters. Loop has 6 letters. [2022-11-25 15:49:49,138 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 15:49:49,139 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 486 states and 617 transitions. [2022-11-25 15:49:49,177 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 26 [2022-11-25 15:49:49,187 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 486 states to 396 states and 527 transitions. [2022-11-25 15:49:49,187 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 130 [2022-11-25 15:49:49,188 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 137 [2022-11-25 15:49:49,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 396 states and 527 transitions. [2022-11-25 15:49:49,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-25 15:49:49,188 INFO L218 hiAutomatonCegarLoop]: Abstraction has 396 states and 527 transitions. [2022-11-25 15:49:49,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states and 527 transitions. [2022-11-25 15:49:49,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 352. [2022-11-25 15:49:49,201 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) [2022-11-25 15:49:49,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 457 transitions. [2022-11-25 15:49:49,205 INFO L240 hiAutomatonCegarLoop]: Abstraction has 352 states and 457 transitions. [2022-11-25 15:49:49,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:49:49,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 15:49:49,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-25 15:49:49,206 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) [2022-11-25 15:49:49,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:49:49,350 INFO L93 Difference]: Finished difference Result 379 states and 514 transitions. [2022-11-25 15:49:49,350 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 379 states and 514 transitions. [2022-11-25 15:49:49,356 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2022-11-25 15:49:49,358 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 379 states to 105 states and 143 transitions. [2022-11-25 15:49:49,358 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 99 [2022-11-25 15:49:49,359 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 99 [2022-11-25 15:49:49,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 143 transitions. [2022-11-25 15:49:49,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-25 15:49:49,360 INFO L218 hiAutomatonCegarLoop]: Abstraction has 105 states and 143 transitions. [2022-11-25 15:49:49,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 143 transitions. [2022-11-25 15:49:49,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 87. [2022-11-25 15:49:49,364 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) [2022-11-25 15:49:49,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 107 transitions. [2022-11-25 15:49:49,365 INFO L240 hiAutomatonCegarLoop]: Abstraction has 87 states and 107 transitions. [2022-11-25 15:49:49,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 15:49:49,366 INFO L428 stractBuchiCegarLoop]: Abstraction has 87 states and 107 transitions. [2022-11-25 15:49:49,367 INFO L335 stractBuchiCegarLoop]: ======== Iteration 7 ============ [2022-11-25 15:49:49,367 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 87 states and 107 transitions. [2022-11-25 15:49:49,368 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2022-11-25 15:49:49,368 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-25 15:49:49,368 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-25 15:49:49,369 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:49:49,369 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-11-25 15:49:49,369 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 [2022-11-25 15:49:49,369 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 [2022-11-25 15:49:49,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:49,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1203085824, now seen corresponding path program 3 times [2022-11-25 15:49:49,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:49,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019697484] [2022-11-25 15:49:49,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:49,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:49,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:49:49,374 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:49:49,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:49:49,378 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:49:49,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:49,379 INFO L85 PathProgramCache]: Analyzing trace with hash 55742, now seen corresponding path program 4 times [2022-11-25 15:49:49,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:49,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358987831] [2022-11-25 15:49:49,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:49,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:49,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:49:49,383 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:49:49,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:49:49,385 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:49:49,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:49,386 INFO L85 PathProgramCache]: Analyzing trace with hash 372328287, now seen corresponding path program 4 times [2022-11-25 15:49:49,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:49,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531367198] [2022-11-25 15:49:49,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:49,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:49,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:49:49,391 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:49:49,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:49:49,395 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:49:49,449 INFO L210 LassoAnalysis]: Preferences: [2022-11-25 15:49:49,449 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-25 15:49:49,450 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-25 15:49:49,450 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-25 15:49:49,450 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-25 15:49:49,450 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:49,450 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-25 15:49:49,450 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-25 15:49:49,451 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration7_Loop [2022-11-25 15:49:49,451 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-25 15:49:49,451 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-25 15:49:49,452 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:49,456 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:49,460 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:49,470 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:49,473 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:49,519 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-25 15:49:49,519 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-25 15:49:49,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:49,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:49,523 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:49,532 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-25 15:49:49,532 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 15:49:49,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Waiting until timeout for monitored process [2022-11-25 15:49:49,558 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-25 15:49:49,558 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-25 15:49:49,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:49,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:49,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:49,564 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:49,571 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-25 15:49:49,571 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 15:49:49,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Waiting until timeout for monitored process [2022-11-25 15:49:49,598 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-25 15:49:49,598 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-25 15:49:49,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:49,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:49,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:49,604 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:49,611 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-25 15:49:49,611 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 15:49:49,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Waiting until timeout for monitored process [2022-11-25 15:49:49,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:49,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:49,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:49,652 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:49,660 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-25 15:49:49,660 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 15:49:49,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Waiting until timeout for monitored process [2022-11-25 15:49:52,376 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-25 15:49:52,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:52,380 INFO L210 LassoAnalysis]: Preferences: [2022-11-25 15:49:52,380 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-25 15:49:52,380 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-25 15:49:52,380 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-25 15:49:52,380 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-25 15:49:52,380 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:52,381 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-25 15:49:52,381 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-25 15:49:52,381 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration7_Loop [2022-11-25 15:49:52,381 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-25 15:49:52,381 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-25 15:49:52,382 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:52,390 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:52,392 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:52,395 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:52,397 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:52,432 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-25 15:49:52,432 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-25 15:49:52,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:52,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:52,433 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:52,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Waiting until timeout for monitored process [2022-11-25 15:49:52,440 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-25 15:49:52,451 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-25 15:49:52,451 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-25 15:49:52,451 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-25 15:49:52,451 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-25 15:49:52,451 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-25 15:49:52,453 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-25 15:49:52,453 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-25 15:49:52,467 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-25 15:49:52,470 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-11-25 15:49:52,470 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-11-25 15:49:52,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:52,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:52,474 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:52,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Waiting until timeout for monitored process [2022-11-25 15:49:52,477 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-25 15:49:52,477 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-25 15:49:52,477 INFO L513 LassoAnalysis]: Proved termination. [2022-11-25 15:49:52,477 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_~i) = 1*rec1_~i Supporting invariants [] [2022-11-25 15:49:52,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:52,481 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-25 15:49:52,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:52,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:52,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 15:49:52,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:52,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:52,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 15:49:52,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:52,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:49:52,592 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2022-11-25 15:49:52,592 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) [2022-11-25 15:49:52,635 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. [2022-11-25 15:49:52,636 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 [2022-11-25 15:49:52,639 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) [2022-11-25 15:49:52,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 14 transitions. [2022-11-25 15:49:52,640 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 11 letters. Loop has 3 letters. [2022-11-25 15:49:52,640 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 15:49:52,640 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 14 letters. Loop has 3 letters. [2022-11-25 15:49:52,641 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 15:49:52,641 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 11 letters. Loop has 6 letters. [2022-11-25 15:49:52,641 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 15:49:52,641 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 101 states and 125 transitions. [2022-11-25 15:49:52,643 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2022-11-25 15:49:52,645 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 101 states to 95 states and 118 transitions. [2022-11-25 15:49:52,645 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 84 [2022-11-25 15:49:52,645 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 85 [2022-11-25 15:49:52,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 118 transitions. [2022-11-25 15:49:52,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-25 15:49:52,646 INFO L218 hiAutomatonCegarLoop]: Abstraction has 95 states and 118 transitions. [2022-11-25 15:49:52,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states and 118 transitions. [2022-11-25 15:49:52,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2022-11-25 15:49:52,651 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) [2022-11-25 15:49:52,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 115 transitions. [2022-11-25 15:49:52,652 INFO L240 hiAutomatonCegarLoop]: Abstraction has 93 states and 115 transitions. [2022-11-25 15:49:52,652 INFO L428 stractBuchiCegarLoop]: Abstraction has 93 states and 115 transitions. [2022-11-25 15:49:52,652 INFO L335 stractBuchiCegarLoop]: ======== Iteration 8 ============ [2022-11-25 15:49:52,652 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 115 transitions. [2022-11-25 15:49:52,653 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2022-11-25 15:49:52,653 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-25 15:49:52,654 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-25 15:49:52,655 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:49:52,655 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-25 15:49:52,656 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 [2022-11-25 15:49:52,656 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 [2022-11-25 15:49:52,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:52,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1060897207, now seen corresponding path program 1 times [2022-11-25 15:49:52,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:52,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962214481] [2022-11-25 15:49:52,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:52,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:52,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:49:52,666 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:49:52,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:49:52,675 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:49:52,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:52,676 INFO L85 PathProgramCache]: Analyzing trace with hash 245881341, now seen corresponding path program 1 times [2022-11-25 15:49:52,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:52,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020309645] [2022-11-25 15:49:52,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:52,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:52,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:49:52,692 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:49:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:49:52,706 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:49:52,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:52,709 INFO L85 PathProgramCache]: Analyzing trace with hash -2071488077, now seen corresponding path program 2 times [2022-11-25 15:49:52,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:52,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746586626] [2022-11-25 15:49:52,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:52,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:52,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:52,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 15:49:52,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:52,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:49:52,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:52,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 15:49:52,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:52,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 15:49:52,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:52,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-25 15:49:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:52,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:49:52,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:52,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 15:49:52,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:52,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 15:49:52,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:52,907 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 24 proven. 29 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-25 15:49:52,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:49:52,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746586626] [2022-11-25 15:49:52,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746586626] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:49:52,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163690531] [2022-11-25 15:49:52,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:49:52,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:49:52,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:52,911 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:49:52,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-25 15:49:52,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:49:52,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:49:52,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 15:49:52,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:53,006 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-25 15:49:53,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:49:53,155 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 24 proven. 29 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-25 15:49:53,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163690531] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:49:53,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:49:53,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2022-11-25 15:49:53,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760176469] [2022-11-25 15:49:53,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:49:53,452 INFO L210 LassoAnalysis]: Preferences: [2022-11-25 15:49:53,452 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-25 15:49:53,452 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-25 15:49:53,453 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-25 15:49:53,453 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-25 15:49:53,453 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:53,453 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-25 15:49:53,453 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-25 15:49:53,453 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration8_Loop [2022-11-25 15:49:53,453 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-25 15:49:53,453 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-25 15:49:53,454 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:53,457 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:53,464 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:53,466 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:53,468 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:53,470 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:53,508 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-25 15:49:53,509 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-25 15:49:53,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:53,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:53,513 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:53,520 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-25 15:49:53,520 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 15:49:53,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Waiting until timeout for monitored process [2022-11-25 15:49:53,535 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-25 15:49:53,536 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-25 15:49:53,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Ended with exit code 0 [2022-11-25 15:49:53,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:53,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:53,540 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:53,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Waiting until timeout for monitored process [2022-11-25 15:49:53,543 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-25 15:49:53,543 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 15:49:53,559 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-25 15:49:53,559 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-25 15:49:53,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:53,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:53,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:53,565 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:53,571 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-25 15:49:53,571 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 15:49:53,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Waiting until timeout for monitored process [2022-11-25 15:49:53,599 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-25 15:49:53,599 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-25 15:49:53,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:53,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:53,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:53,606 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:53,611 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-25 15:49:53,611 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 15:49:53,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Waiting until timeout for monitored process [2022-11-25 15:49:53,643 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-25 15:49:53,643 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-25 15:49:53,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Ended with exit code 0 [2022-11-25 15:49:53,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:53,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:53,649 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:53,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Waiting until timeout for monitored process [2022-11-25 15:49:53,652 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-25 15:49:53,652 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 15:49:53,666 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-25 15:49:53,666 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-25 15:49:53,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Ended with exit code 0 [2022-11-25 15:49:53,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:53,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:53,671 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:53,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Waiting until timeout for monitored process [2022-11-25 15:49:53,674 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-25 15:49:53,674 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 15:49:53,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Ended with exit code 0 [2022-11-25 15:49:53,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:53,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:53,693 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:53,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Waiting until timeout for monitored process [2022-11-25 15:49:53,699 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-25 15:49:53,699 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 15:49:53,718 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-25 15:49:53,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Ended with exit code 0 [2022-11-25 15:49:53,722 INFO L210 LassoAnalysis]: Preferences: [2022-11-25 15:49:53,722 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-25 15:49:53,722 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-25 15:49:53,722 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-25 15:49:53,723 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-25 15:49:53,723 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:53,723 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-25 15:49:53,723 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-25 15:49:53,723 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration8_Loop [2022-11-25 15:49:53,723 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-25 15:49:53,723 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-25 15:49:53,724 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:53,728 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:53,737 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:53,740 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:53,742 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:53,745 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 15:49:53,785 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-25 15:49:53,786 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-25 15:49:53,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:53,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:53,787 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:53,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (61)] Waiting until timeout for monitored process [2022-11-25 15:49:53,797 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-25 15:49:53,810 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-25 15:49:53,810 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-25 15:49:53,810 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-25 15:49:53,810 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-25 15:49:53,810 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-25 15:49:53,811 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-25 15:49:53,811 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-25 15:49:53,835 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-25 15:49:53,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (61)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:53,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:53,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:53,840 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:53,847 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-25 15:49:53,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (62)] Waiting until timeout for monitored process [2022-11-25 15:49:53,862 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-25 15:49:53,862 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-25 15:49:53,862 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-25 15:49:53,862 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-25 15:49:53,862 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-25 15:49:53,863 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-25 15:49:53,863 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-25 15:49:53,865 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-25 15:49:53,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (62)] Ended with exit code 0 [2022-11-25 15:49:53,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:53,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:53,869 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:53,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (63)] Waiting until timeout for monitored process [2022-11-25 15:49:53,872 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-25 15:49:53,885 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-25 15:49:53,885 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-25 15:49:53,885 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-25 15:49:53,885 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-25 15:49:53,885 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-25 15:49:53,886 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-25 15:49:53,886 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-25 15:49:53,917 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-25 15:49:53,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (63)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:53,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:53,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:53,924 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:53,931 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 [2022-11-25 15:49:53,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (64)] Waiting until timeout for monitored process [2022-11-25 15:49:53,952 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-25 15:49:53,952 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-25 15:49:53,952 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-25 15:49:53,952 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-25 15:49:53,952 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-25 15:49:53,953 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-25 15:49:53,953 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-25 15:49:53,967 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-25 15:49:53,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (64)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:53,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:53,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:53,972 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:53,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (65)] Waiting until timeout for monitored process [2022-11-25 15:49:53,976 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-25 15:49:53,990 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-25 15:49:53,990 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-25 15:49:53,991 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-25 15:49:53,991 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-25 15:49:53,991 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-25 15:49:53,991 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-25 15:49:53,991 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-25 15:49:53,995 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-25 15:49:53,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (65)] Ended with exit code 0 [2022-11-25 15:49:53,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:53,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:53,999 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:54,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (66)] Waiting until timeout for monitored process [2022-11-25 15:49:54,004 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-25 15:49:54,017 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-25 15:49:54,017 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-25 15:49:54,017 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-25 15:49:54,017 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-25 15:49:54,017 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-25 15:49:54,018 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-25 15:49:54,018 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-25 15:49:54,021 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-25 15:49:54,024 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2022-11-25 15:49:54,024 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-11-25 15:49:54,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 15:49:54,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:54,026 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:54,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (67)] Waiting until timeout for monitored process [2022-11-25 15:49:54,028 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-25 15:49:54,028 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-25 15:49:54,029 INFO L513 LassoAnalysis]: Proved termination. [2022-11-25 15:49:54,029 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2022-11-25 15:49:54,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (66)] Ended with exit code 0 [2022-11-25 15:49:54,032 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-25 15:49:54,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:54,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (67)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:54,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:54,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:54,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 15:49:54,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:54,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:54,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 15:49:54,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:54,675 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 15:49:54,676 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2022-11-25 15:49:54,676 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) [2022-11-25 15:49:54,761 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. [2022-11-25 15:49:54,762 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 [2022-11-25 15:49:54,764 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) [2022-11-25 15:49:54,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 16 transitions. [2022-11-25 15:49:54,764 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 30 letters. Loop has 24 letters. [2022-11-25 15:49:54,765 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 15:49:54,765 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-11-25 15:49:54,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:54,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:54,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 15:49:54,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:55,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:55,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 15:49:55,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:55,392 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 15:49:55,393 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 [2022-11-25 15:49:55,393 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) [2022-11-25 15:49:55,475 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. [2022-11-25 15:49:55,476 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 [2022-11-25 15:49:55,476 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) [2022-11-25 15:49:55,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 16 transitions. [2022-11-25 15:49:55,477 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 30 letters. Loop has 24 letters. [2022-11-25 15:49:55,477 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 15:49:55,477 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-11-25 15:49:55,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:55,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:55,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 15:49:55,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:55,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:55,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 15:49:55,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:56,235 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 15:49:56,235 INFO L141 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2022-11-25 15:49:56,235 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) [2022-11-25 15:49:56,648 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. [2022-11-25 15:49:56,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2022-11-25 15:49:56,649 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) [2022-11-25 15:49:56,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 39 transitions. [2022-11-25 15:49:56,650 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 39 transitions. Stem has 30 letters. Loop has 24 letters. [2022-11-25 15:49:56,655 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 15:49:56,656 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-11-25 15:49:56,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:56,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:56,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 15:49:56,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:57,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:57,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 15:49:57,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:57,294 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 15:49:57,295 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 [2022-11-25 15:49:57,295 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) [2022-11-25 15:49:58,049 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. [2022-11-25 15:49:58,051 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 [2022-11-25 15:49:58,053 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) [2022-11-25 15:49:58,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 50 transitions. [2022-11-25 15:49:58,056 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 50 transitions. Stem has 30 letters. Loop has 24 letters. [2022-11-25 15:49:58,056 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 15:49:58,057 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 50 transitions. Stem has 54 letters. Loop has 24 letters. [2022-11-25 15:49:58,057 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 15:49:58,058 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 50 transitions. Stem has 30 letters. Loop has 48 letters. [2022-11-25 15:49:58,059 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 15:49:58,059 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 410 states and 516 transitions. [2022-11-25 15:49:58,066 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 62 [2022-11-25 15:49:58,071 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 410 states to 254 states and 346 transitions. [2022-11-25 15:49:58,071 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 155 [2022-11-25 15:49:58,072 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 165 [2022-11-25 15:49:58,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 254 states and 346 transitions. [2022-11-25 15:49:58,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-25 15:49:58,073 INFO L218 hiAutomatonCegarLoop]: Abstraction has 254 states and 346 transitions. [2022-11-25 15:49:58,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states and 346 transitions. [2022-11-25 15:49:58,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 217. [2022-11-25 15:49:58,083 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) [2022-11-25 15:49:58,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 271 transitions. [2022-11-25 15:49:58,086 INFO L240 hiAutomatonCegarLoop]: Abstraction has 217 states and 271 transitions. [2022-11-25 15:49:58,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:49:58,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 15:49:58,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-25 15:49:58,087 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) [2022-11-25 15:49:58,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:49:58,173 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2022-11-25 15:49:58,174 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 36 states and 38 transitions. [2022-11-25 15:49:58,174 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-11-25 15:49:58,175 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 36 states to 0 states and 0 transitions. [2022-11-25 15:49:58,175 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2022-11-25 15:49:58,175 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2022-11-25 15:49:58,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2022-11-25 15:49:58,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:49:58,175 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-25 15:49:58,175 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-25 15:49:58,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 15:49:58,177 INFO L428 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-25 15:49:58,177 INFO L335 stractBuchiCegarLoop]: ======== Iteration 9 ============ [2022-11-25 15:49:58,178 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2022-11-25 15:49:58,178 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-11-25 15:49:58,178 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2022-11-25 15:49:58,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 25.11 03:49:58 BoogieIcfgContainer [2022-11-25 15:49:58,188 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2022-11-25 15:49:58,190 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 15:49:58,190 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 15:49:58,190 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 15:49:58,191 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:49:34" (3/4) ... [2022-11-25 15:49:58,194 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-25 15:49:58,195 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 15:49:58,195 INFO L158 Benchmark]: Toolchain (without parser) took 24145.80ms. Allocated memory was 176.2MB in the beginning and 245.4MB in the end (delta: 69.2MB). Free memory was 132.1MB in the beginning and 186.5MB in the end (delta: -54.4MB). Peak memory consumption was 16.6MB. Max. memory is 16.1GB. [2022-11-25 15:49:58,196 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 111.1MB. Free memory is still 88.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 15:49:58,196 INFO L158 Benchmark]: CACSL2BoogieTranslator took 262.38ms. Allocated memory is still 176.2MB. Free memory was 131.8MB in the beginning and 122.9MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-25 15:49:58,196 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.30ms. Allocated memory is still 176.2MB. Free memory was 122.9MB in the beginning and 121.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 15:49:58,197 INFO L158 Benchmark]: Boogie Preprocessor took 19.02ms. Allocated memory is still 176.2MB. Free memory was 121.6MB in the beginning and 120.8MB in the end (delta: 841.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 15:49:58,197 INFO L158 Benchmark]: RCFGBuilder took 310.63ms. Allocated memory is still 176.2MB. Free memory was 120.4MB in the beginning and 111.2MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 15:49:58,198 INFO L158 Benchmark]: BuchiAutomizer took 23499.02ms. Allocated memory was 176.2MB in the beginning and 245.4MB in the end (delta: 69.2MB). Free memory was 111.2MB in the beginning and 186.5MB in the end (delta: -75.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 15:49:58,198 INFO L158 Benchmark]: Witness Printer took 5.21ms. Allocated memory is still 245.4MB. Free memory is still 186.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 15:49:58,200 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 111.1MB. Free memory is still 88.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 262.38ms. Allocated memory is still 176.2MB. Free memory was 131.8MB in the beginning and 122.9MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.30ms. Allocated memory is still 176.2MB. Free memory was 122.9MB in the beginning and 121.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.02ms. Allocated memory is still 176.2MB. Free memory was 121.6MB in the beginning and 120.8MB in the end (delta: 841.4kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 310.63ms. Allocated memory is still 176.2MB. Free memory was 120.4MB in the beginning and 111.2MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * BuchiAutomizer took 23499.02ms. Allocated memory was 176.2MB in the beginning and 245.4MB in the end (delta: 69.2MB). Free memory was 111.2MB in the beginning and 186.5MB in the end (delta: -75.3MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 5.21ms. Allocated memory is still 245.4MB. Free memory is still 186.5MB. 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@6a0b1aa5 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 23.4s and 9 iterations. TraceHistogramMax:5. Analysis of lassos took 13.0s. Construction of modules took 1.4s. Büchi inclusion checks took 8.3s. 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 0.2s 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, 1.5s 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, 0.1s 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: 46ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 18 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 7 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 6.6s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2022-11-25 15:49:58,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:58,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-11-25 15:49:58,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:58,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:59,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2505e400-aa3b-4b38-9b00-037209699b81/bin/uautomizer-ZsLfNo2U6R/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