./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 0e0057cc 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_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --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 32bit --witnessprinter.graph.data.programhash 22d9a6832a4080412e38f5d573b63985f3b10b3c2009b6559595c7c0bbda414f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:53:20,160 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:53:20,231 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Termination-32bit-Automizer_Default.epf [2023-11-26 11:53:20,237 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:53:20,238 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:53:20,263 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:53:20,264 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:53:20,264 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:53:20,265 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:53:20,266 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:53:20,267 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:53:20,267 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:53:20,267 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:53:20,268 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2023-11-26 11:53:20,269 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2023-11-26 11:53:20,269 INFO L153 SettingsManager]: * Use old map elimination=false [2023-11-26 11:53:20,269 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2023-11-26 11:53:20,270 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2023-11-26 11:53:20,274 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2023-11-26 11:53:20,275 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:53:20,275 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2023-11-26 11:53:20,276 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:53:20,276 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:53:20,277 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:53:20,277 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:53:20,278 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2023-11-26 11:53:20,278 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2023-11-26 11:53:20,278 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2023-11-26 11:53:20,279 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:53:20,279 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:53:20,280 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:53:20,281 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2023-11-26 11:53:20,281 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:53:20,281 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:53:20,282 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:53:20,282 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:53:20,282 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:53:20,283 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2023-11-26 11:53:20,283 INFO L153 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_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22d9a6832a4080412e38f5d573b63985f3b10b3c2009b6559595c7c0bbda414f [2023-11-26 11:53:20,527 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:53:20,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:53:20,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:53:20,560 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:53:20,561 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:53:20,562 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c [2023-11-26 11:53:23,768 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:53:24,030 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:53:24,031 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c [2023-11-26 11:53:24,038 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/data/546f68f22/f6cee6ea2b47463485424e9b311c6c92/FLAG471125a33 [2023-11-26 11:53:24,056 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/data/546f68f22/f6cee6ea2b47463485424e9b311c6c92 [2023-11-26 11:53:24,059 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:53:24,061 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:53:24,062 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:53:24,062 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:53:24,068 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:53:24,068 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:53:24" (1/1) ... [2023-11-26 11:53:24,069 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6160bc57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:24, skipping insertion in model container [2023-11-26 11:53:24,070 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:53:24" (1/1) ... [2023-11-26 11:53:24,089 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:53:24,243 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:53:24,257 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:53:24,274 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:53:24,288 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:53:24,289 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:24 WrapperNode [2023-11-26 11:53:24,289 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:53:24,290 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:53:24,290 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:53:24,290 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:53:24,299 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:24" (1/1) ... [2023-11-26 11:53:24,305 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:24" (1/1) ... [2023-11-26 11:53:24,324 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 20 [2023-11-26 11:53:24,324 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:53:24,325 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:53:24,325 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:53:24,326 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:53:24,338 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:24" (1/1) ... [2023-11-26 11:53:24,340 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:24" (1/1) ... [2023-11-26 11:53:24,342 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:24" (1/1) ... [2023-11-26 11:53:24,357 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 11:53:24,357 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:24" (1/1) ... [2023-11-26 11:53:24,358 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:24" (1/1) ... [2023-11-26 11:53:24,364 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:24" (1/1) ... [2023-11-26 11:53:24,366 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:24" (1/1) ... [2023-11-26 11:53:24,367 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:24" (1/1) ... [2023-11-26 11:53:24,368 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:24" (1/1) ... [2023-11-26 11:53:24,370 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:53:24,371 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:53:24,371 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:53:24,371 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:53:24,372 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:24" (1/1) ... [2023-11-26 11:53:24,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:24,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:24,412 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:24,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2023-11-26 11:53:24,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:53:24,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:53:24,453 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2023-11-26 11:53:24,453 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2023-11-26 11:53:24,454 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2023-11-26 11:53:24,454 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2023-11-26 11:53:24,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:53:24,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:53:24,543 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:53:24,545 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:53:24,770 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:53:24,787 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:53:24,788 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-26 11:53:24,790 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:53:24 BoogieIcfgContainer [2023-11-26 11:53:24,790 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:53:24,792 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2023-11-26 11:53:24,794 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2023-11-26 11:53:24,798 INFO L274 PluginConnector]: BuchiAutomizer initialized [2023-11-26 11:53:24,799 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-26 11:53:24,799 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 26.11 11:53:24" (1/3) ... [2023-11-26 11:53:24,800 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@21683d11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 26.11 11:53:24, skipping insertion in model container [2023-11-26 11:53:24,801 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-26 11:53:24,801 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:24" (2/3) ... [2023-11-26 11:53:24,803 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@21683d11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 26.11 11:53:24, skipping insertion in model container [2023-11-26 11:53:24,804 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-26 11:53:24,804 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:53:24" (3/3) ... [2023-11-26 11:53:24,806 INFO L332 chiAutomizerObserver]: Analyzing ICFG fibo_2calls_4-2.c [2023-11-26 11:53:24,869 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2023-11-26 11:53:24,869 INFO L304 stractBuchiCegarLoop]: Hoare is false [2023-11-26 11:53:24,870 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2023-11-26 11:53:24,870 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2023-11-26 11:53:24,870 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2023-11-26 11:53:24,870 INFO L308 stractBuchiCegarLoop]: Difference is false [2023-11-26 11:53:24,870 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2023-11-26 11:53:24,870 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2023-11-26 11:53:24,875 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 27 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-26 11:53:24,896 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2023-11-26 11:53:24,897 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-26 11:53:24,897 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-26 11:53:24,903 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-11-26 11:53:24,903 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:24,903 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2023-11-26 11:53:24,903 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 27 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-26 11:53:24,907 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2023-11-26 11:53:24,907 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-26 11:53:24,907 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-26 11:53:24,908 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-11-26 11:53:24,908 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:24,917 INFO L748 eck$LassoCheckResult]: Stem: 25#$Ultimate##0true assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(18, 2);call #Ultimate.allocInit(12, 3); 5#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 4; 13#L39true call main_#t~ret8#1 := fibo1(main_~x~0#1);< 18#$Ultimate##0true [2023-11-26 11:53:24,917 INFO L750 eck$LassoCheckResult]: Loop: 18#$Ultimate##0true ~n := #in~n; 7#L10true assume !(~n < 1); 6#L12true assume !(1 == ~n); 8#L15true call #t~ret4 := fibo2(~n - 1);< 15#$Ultimate##0true ~n := #in~n; 10#L20true assume !(~n < 1); 14#L22true assume !(1 == ~n); 21#L25true call #t~ret6 := fibo1(~n - 1);< 18#$Ultimate##0true [2023-11-26 11:53:24,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:24,924 INFO L85 PathProgramCache]: Analyzing trace with hash 29898, now seen corresponding path program 1 times [2023-11-26 11:53:24,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:24,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960244320] [2023-11-26 11:53:24,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:24,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:25,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:53:25,057 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 11:53:25,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:53:25,084 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 11:53:25,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:25,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1206117480, now seen corresponding path program 1 times [2023-11-26 11:53:25,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:25,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110655191] [2023-11-26 11:53:25,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:25,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:53:25,100 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 11:53:25,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:53:25,110 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 11:53:25,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:25,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1276411855, now seen corresponding path program 1 times [2023-11-26 11:53:25,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:25,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753453915] [2023-11-26 11:53:25,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:25,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:25,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:53:25,129 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 11:53:25,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:53:25,145 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 11:53:25,367 INFO L210 LassoAnalysis]: Preferences: [2023-11-26 11:53:25,368 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-26 11:53:25,368 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-26 11:53:25,368 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-26 11:53:25,368 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-26 11:53:25,368 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:25,369 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-26 11:53:25,369 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-26 11:53:25,369 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-2.c_Iteration1_Loop [2023-11-26 11:53:25,369 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-26 11:53:25,369 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-26 11:53:25,388 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:25,400 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:25,406 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:25,412 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:25,417 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:25,421 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:25,423 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:25,427 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:25,530 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-26 11:53:25,531 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-26 11:53:25,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:25,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:25,541 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:25,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2023-11-26 11:53:25,544 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-26 11:53:25,544 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 11:53:25,567 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-26 11:53:25,567 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-26 11:53:25,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Ended with exit code 0 [2023-11-26 11:53:25,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:25,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:25,577 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:25,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2023-11-26 11:53:25,592 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-26 11:53:25,592 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 11:53:25,614 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-26 11:53:25,614 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-26 11:53:25,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:25,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:25,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:25,630 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:25,649 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-26 11:53:25,649 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 11:53:25,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2023-11-26 11:53:25,671 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-26 11:53:25,672 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#in~n=0} Honda state: {fibo2_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-26 11:53:25,686 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Ended with exit code 0 [2023-11-26 11:53:25,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:25,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:25,688 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:25,700 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-26 11:53:25,700 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 11:53:25,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2023-11-26 11:53:25,716 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-26 11:53:25,716 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret4=0} Honda state: {fibo1_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-26 11:53:25,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:25,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:25,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:25,725 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:25,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2023-11-26 11:53:25,733 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-26 11:53:25,733 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 11:53:25,758 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-26 11:53:25,758 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret6=0} Honda state: {fibo2_#t~ret6=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-26 11:53:25,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:25,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:25,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:25,770 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:25,784 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-26 11:53:25,784 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 11:53:25,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2023-11-26 11:53:25,815 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-26 11:53:25,815 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret5=0} Honda state: {fibo1_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-26 11:53:25,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:25,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:25,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:25,831 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:25,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2023-11-26 11:53:25,864 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-26 11:53:25,864 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 11:53:25,886 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-26 11:53:25,886 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret7=0} Honda state: {fibo2_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-26 11:53:25,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:25,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:25,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:25,896 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:25,910 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-26 11:53:25,910 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 11:53:25,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2023-11-26 11:53:25,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Ended with exit code 0 [2023-11-26 11:53:25,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:25,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:25,931 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:25,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2023-11-26 11:53:25,939 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-26 11:53:25,939 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 11:53:26,052 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-26 11:53:26,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:26,057 INFO L210 LassoAnalysis]: Preferences: [2023-11-26 11:53:26,057 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-26 11:53:26,058 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-26 11:53:26,058 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-26 11:53:26,058 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-26 11:53:26,058 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:26,058 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-26 11:53:26,058 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-26 11:53:26,058 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-2.c_Iteration1_Loop [2023-11-26 11:53:26,058 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-26 11:53:26,058 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-26 11:53:26,060 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:26,065 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:26,069 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:26,072 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:26,076 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:26,079 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:26,091 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:26,095 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:26,168 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-26 11:53:26,173 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-26 11:53:26,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:26,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:26,179 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:26,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2023-11-26 11:53:26,191 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 [2023-11-26 11:53:26,204 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-26 11:53:26,205 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-26 11:53:26,205 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-26 11:53:26,205 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-26 11:53:26,205 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-26 11:53:26,208 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-26 11:53:26,208 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-26 11:53:26,220 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-26 11:53:26,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:26,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:26,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:26,226 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:26,231 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 [2023-11-26 11:53:26,244 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-26 11:53:26,244 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-26 11:53:26,244 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-26 11:53:26,244 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-26 11:53:26,244 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-26 11:53:26,245 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-26 11:53:26,245 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-26 11:53:26,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2023-11-26 11:53:26,262 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-26 11:53:26,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:26,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:26,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:26,268 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:26,280 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 [2023-11-26 11:53:26,292 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-26 11:53:26,292 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-26 11:53:26,292 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-26 11:53:26,293 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-26 11:53:26,293 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-26 11:53:26,293 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-26 11:53:26,293 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-26 11:53:26,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2023-11-26 11:53:26,303 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-26 11:53:26,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:26,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:26,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:26,309 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:26,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2023-11-26 11:53:26,315 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 [2023-11-26 11:53:26,328 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-26 11:53:26,328 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-26 11:53:26,328 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-26 11:53:26,329 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-26 11:53:26,329 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-26 11:53:26,330 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-26 11:53:26,330 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-26 11:53:26,340 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-26 11:53:26,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:26,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:26,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:26,344 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:26,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2023-11-26 11:53:26,347 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 [2023-11-26 11:53:26,357 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-26 11:53:26,357 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-26 11:53:26,357 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-26 11:53:26,357 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-26 11:53:26,358 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-26 11:53:26,358 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-26 11:53:26,358 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-26 11:53:26,379 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-26 11:53:26,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:26,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:26,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:26,384 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:26,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2023-11-26 11:53:26,391 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 [2023-11-26 11:53:26,402 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-26 11:53:26,402 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-26 11:53:26,402 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-26 11:53:26,402 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-26 11:53:26,402 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-26 11:53:26,404 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-26 11:53:26,404 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-26 11:53:26,425 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-26 11:53:26,429 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-26 11:53:26,429 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-26 11:53:26,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:26,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:26,467 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:26,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2023-11-26 11:53:26,469 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-26 11:53:26,469 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-26 11:53:26,469 INFO L513 LassoAnalysis]: Proved termination. [2023-11-26 11:53:26,470 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_#in~n) = 1*fibo1_#in~n Supporting invariants [] [2023-11-26 11:53:26,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:26,481 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-26 11:53:26,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:26,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:53:26,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:26,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:26,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 11:53:26,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:26,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:26,688 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 5 loop predicates [2023-11-26 11:53:26,691 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 27 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:53:26,978 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 27 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5). Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 85 states and 117 transitions. Complement of second has 24 states. [2023-11-26 11:53:26,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 1 stem states 5 non-accepting loop states 1 accepting loop states [2023-11-26 11:53:26,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:53:26,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 21 transitions. [2023-11-26 11:53:26,991 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 8 letters. [2023-11-26 11:53:26,993 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-26 11:53:26,994 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 11 letters. Loop has 8 letters. [2023-11-26 11:53:26,994 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-26 11:53:26,994 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 16 letters. [2023-11-26 11:53:26,995 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-26 11:53:26,996 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 85 states and 117 transitions. [2023-11-26 11:53:27,013 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2023-11-26 11:53:27,030 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 85 states to 61 states and 82 transitions. [2023-11-26 11:53:27,031 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 39 [2023-11-26 11:53:27,032 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 40 [2023-11-26 11:53:27,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 82 transitions. [2023-11-26 11:53:27,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-26 11:53:27,035 INFO L218 hiAutomatonCegarLoop]: Abstraction has 61 states and 82 transitions. [2023-11-26 11:53:27,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states and 82 transitions. [2023-11-26 11:53:27,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2023-11-26 11:53:27,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 38 states have internal predecessors, (47), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) [2023-11-26 11:53:27,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2023-11-26 11:53:27,078 INFO L240 hiAutomatonCegarLoop]: Abstraction has 54 states and 72 transitions. [2023-11-26 11:53:27,078 INFO L428 stractBuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2023-11-26 11:53:27,078 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2023-11-26 11:53:27,078 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 72 transitions. [2023-11-26 11:53:27,081 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2023-11-26 11:53:27,081 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-26 11:53:27,082 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-26 11:53:27,084 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:27,084 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:27,084 INFO L748 eck$LassoCheckResult]: Stem: 236#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(18, 2);call #Ultimate.allocInit(12, 3); 223#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 4; 218#L39 call main_#t~ret8#1 := fibo1(main_~x~0#1);< 217#$Ultimate##0 ~n := #in~n; 219#L10 assume !(~n < 1); 229#L12 assume !(1 == ~n); 213#L15 call #t~ret4 := fibo2(~n - 1);< 233#$Ultimate##0 ~n := #in~n; 247#L20 assume !(~n < 1); 248#L22 assume !(1 == ~n); 203#L25 call #t~ret6 := fibo1(~n - 1);< 220#$Ultimate##0 ~n := #in~n; 222#L10 assume ~n < 1;#res := 0; 209#fibo1FINAL assume true; 210#fibo1EXIT >#48#return; 211#L25-1 [2023-11-26 11:53:27,085 INFO L750 eck$LassoCheckResult]: Loop: 211#L25-1 call #t~ret7 := fibo1(~n - 2);< 216#$Ultimate##0 ~n := #in~n; 242#L10 assume !(~n < 1); 243#L12 assume !(1 == ~n); 212#L15 call #t~ret4 := fibo2(~n - 1);< 225#$Ultimate##0 ~n := #in~n; 245#L20 assume !(~n < 1); 246#L22 assume !(1 == ~n); 224#L25 call #t~ret6 := fibo1(~n - 1);< 216#$Ultimate##0 ~n := #in~n; 242#L10 assume ~n < 1;#res := 0; 238#fibo1FINAL assume true; 239#fibo1EXIT >#48#return; 211#L25-1 [2023-11-26 11:53:27,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:27,088 INFO L85 PathProgramCache]: Analyzing trace with hash -722660232, now seen corresponding path program 1 times [2023-11-26 11:53:27,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:27,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714029155] [2023-11-26 11:53:27,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:27,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:27,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:27,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 11:53:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:27,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:53:27,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:27,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714029155] [2023-11-26 11:53:27,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714029155] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:27,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:27,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:53:27,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621968792] [2023-11-26 11:53:27,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:27,308 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-26 11:53:27,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:27,309 INFO L85 PathProgramCache]: Analyzing trace with hash -880179458, now seen corresponding path program 1 times [2023-11-26 11:53:27,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:27,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818071745] [2023-11-26 11:53:27,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:27,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:27,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:27,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-26 11:53:27,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:27,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:53:27,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:27,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818071745] [2023-11-26 11:53:27,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818071745] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:27,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:27,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:53:27,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963775983] [2023-11-26 11:53:27,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:27,388 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-11-26 11:53:27,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:27,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:53:27,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:53:27,392 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. cyclomatic complexity: 20 Second operand has 6 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:53:27,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:27,493 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2023-11-26 11:53:27,493 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 68 states and 88 transitions. [2023-11-26 11:53:27,496 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2023-11-26 11:53:27,498 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 68 states to 66 states and 86 transitions. [2023-11-26 11:53:27,499 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 46 [2023-11-26 11:53:27,499 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 46 [2023-11-26 11:53:27,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 86 transitions. [2023-11-26 11:53:27,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-26 11:53:27,500 INFO L218 hiAutomatonCegarLoop]: Abstraction has 66 states and 86 transitions. [2023-11-26 11:53:27,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states and 86 transitions. [2023-11-26 11:53:27,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2023-11-26 11:53:27,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 38 states have (on average 1.263157894736842) internal successors, (48), 42 states have internal predecessors, (48), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (16), 7 states have call predecessors, (16), 10 states have call successors, (16) [2023-11-26 11:53:27,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2023-11-26 11:53:27,508 INFO L240 hiAutomatonCegarLoop]: Abstraction has 58 states and 76 transitions. [2023-11-26 11:53:27,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:53:27,510 INFO L428 stractBuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2023-11-26 11:53:27,510 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2023-11-26 11:53:27,510 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 58 states and 76 transitions. [2023-11-26 11:53:27,511 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2023-11-26 11:53:27,512 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-26 11:53:27,512 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-26 11:53:27,513 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:27,513 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:27,514 INFO L748 eck$LassoCheckResult]: Stem: 381#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(18, 2);call #Ultimate.allocInit(12, 3); 364#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 4; 365#L39 call main_#t~ret8#1 := fibo1(main_~x~0#1);< 366#$Ultimate##0 ~n := #in~n; 367#L10 assume !(~n < 1); 395#L12 assume !(1 == ~n); 359#L15 call #t~ret4 := fibo2(~n - 1);< 379#$Ultimate##0 ~n := #in~n; 396#L20 assume !(~n < 1); 397#L22 assume !(1 == ~n); 348#L25 call #t~ret6 := fibo1(~n - 1);< 368#$Ultimate##0 ~n := #in~n; 370#L10 assume !(~n < 1); 373#L12 assume 1 == ~n;#res := 1; 374#fibo1FINAL assume true; 386#fibo1EXIT >#48#return; 355#L25-1 [2023-11-26 11:53:27,514 INFO L750 eck$LassoCheckResult]: Loop: 355#L25-1 call #t~ret7 := fibo1(~n - 2);< 362#$Ultimate##0 ~n := #in~n; 388#L10 assume !(~n < 1); 387#L12 assume !(1 == ~n); 361#L15 call #t~ret4 := fibo2(~n - 1);< 392#$Ultimate##0 ~n := #in~n; 391#L20 assume !(~n < 1); 389#L22 assume !(1 == ~n); 356#L25 call #t~ret6 := fibo1(~n - 1);< 362#$Ultimate##0 ~n := #in~n; 388#L10 assume !(~n < 1); 387#L12 assume 1 == ~n;#res := 1; 384#fibo1FINAL assume true; 385#fibo1EXIT >#48#return; 355#L25-1 [2023-11-26 11:53:27,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:27,514 INFO L85 PathProgramCache]: Analyzing trace with hash -927605802, now seen corresponding path program 1 times [2023-11-26 11:53:27,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:27,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239348134] [2023-11-26 11:53:27,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:27,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:27,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:27,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 11:53:27,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:27,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:27,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:27,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239348134] [2023-11-26 11:53:27,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239348134] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:53:27,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425753095] [2023-11-26 11:53:27,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:27,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:27,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:27,695 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:27,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-26 11:53:27,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:27,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:27,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:53:27,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:27,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:27,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:28,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:28,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425753095] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:53:28,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:53:28,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2023-11-26 11:53:28,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835247898] [2023-11-26 11:53:28,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:28,007 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-26 11:53:28,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:28,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1515734512, now seen corresponding path program 1 times [2023-11-26 11:53:28,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:28,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503086349] [2023-11-26 11:53:28,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:28,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:28,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:53:28,027 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 11:53:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:53:28,051 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 11:53:28,310 INFO L210 LassoAnalysis]: Preferences: [2023-11-26 11:53:28,310 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-26 11:53:28,310 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-26 11:53:28,310 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-26 11:53:28,310 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-26 11:53:28,310 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:28,311 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-26 11:53:28,311 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-26 11:53:28,311 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-2.c_Iteration3_Loop [2023-11-26 11:53:28,311 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-26 11:53:28,311 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-26 11:53:28,313 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:28,316 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:28,319 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:28,321 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:28,324 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:28,326 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:28,332 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:28,335 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:28,337 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:28,398 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-26 11:53:28,398 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-26 11:53:28,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:28,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:28,403 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:28,416 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-26 11:53:28,416 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 11:53:28,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2023-11-26 11:53:28,439 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-26 11:53:28,439 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#in~n=2} Honda state: {fibo2_#in~n=2} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-26 11:53:28,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:28,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:28,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:28,448 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:28,460 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-26 11:53:28,460 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 11:53:28,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2023-11-26 11:53:28,482 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-26 11:53:28,482 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret4=0} Honda state: {fibo1_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-26 11:53:28,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:28,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:28,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:28,495 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:28,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2023-11-26 11:53:28,503 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-26 11:53:28,503 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 11:53:28,519 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-26 11:53:28,519 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret5=0} Honda state: {fibo1_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-26 11:53:28,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:28,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:28,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:28,526 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:28,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2023-11-26 11:53:28,530 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-26 11:53:28,530 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 11:53:28,543 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-26 11:53:28,543 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret7=0} Honda state: {fibo2_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-26 11:53:28,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:28,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:28,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:28,548 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:28,563 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-26 11:53:28,563 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 11:53:28,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2023-11-26 11:53:28,594 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-26 11:53:28,595 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-26 11:53:28,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Ended with exit code 0 [2023-11-26 11:53:28,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:28,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:28,599 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:28,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2023-11-26 11:53:28,602 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-26 11:53:28,602 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 11:53:28,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Ended with exit code 0 [2023-11-26 11:53:28,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:28,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:28,621 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:28,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2023-11-26 11:53:28,626 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-26 11:53:28,626 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 11:53:28,641 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-26 11:53:28,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Ended with exit code 0 [2023-11-26 11:53:28,644 INFO L210 LassoAnalysis]: Preferences: [2023-11-26 11:53:28,645 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-26 11:53:28,645 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-26 11:53:28,645 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-26 11:53:28,645 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-26 11:53:28,645 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:28,645 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-26 11:53:28,645 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-26 11:53:28,645 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-2.c_Iteration3_Loop [2023-11-26 11:53:28,645 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-26 11:53:28,645 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-26 11:53:28,647 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:28,650 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:28,653 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:28,655 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:28,660 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:28,666 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:28,670 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:28,673 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:28,676 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:28,761 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-26 11:53:28,762 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-26 11:53:28,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:28,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:28,767 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:28,773 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 [2023-11-26 11:53:28,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2023-11-26 11:53:28,794 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-26 11:53:28,795 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-26 11:53:28,795 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-26 11:53:28,795 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-26 11:53:28,795 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-26 11:53:28,797 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-26 11:53:28,797 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-26 11:53:28,814 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-26 11:53:28,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:28,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:28,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:28,820 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:28,827 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 [2023-11-26 11:53:28,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2023-11-26 11:53:28,837 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-26 11:53:28,837 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-26 11:53:28,837 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-26 11:53:28,837 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-26 11:53:28,837 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-26 11:53:28,838 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-26 11:53:28,838 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-26 11:53:28,842 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-26 11:53:28,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Ended with exit code 0 [2023-11-26 11:53:28,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:28,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:28,846 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:28,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2023-11-26 11:53:28,852 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 [2023-11-26 11:53:28,862 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-26 11:53:28,862 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-26 11:53:28,862 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-26 11:53:28,862 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-26 11:53:28,862 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-26 11:53:28,863 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-26 11:53:28,863 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-26 11:53:28,898 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-26 11:53:28,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:28,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:28,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:28,908 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:28,915 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 [2023-11-26 11:53:28,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2023-11-26 11:53:28,927 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-26 11:53:28,928 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-26 11:53:28,928 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-26 11:53:28,928 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-26 11:53:28,928 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-26 11:53:28,928 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-26 11:53:28,929 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-26 11:53:28,938 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-26 11:53:28,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:28,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:28,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:28,948 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:28,953 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 [2023-11-26 11:53:28,968 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-26 11:53:28,968 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-26 11:53:28,968 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-26 11:53:28,968 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-26 11:53:28,968 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-26 11:53:28,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2023-11-26 11:53:28,970 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-26 11:53:28,971 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-26 11:53:28,994 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-26 11:53:29,002 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-26 11:53:29,002 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-26 11:53:29,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:29,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:29,006 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:29,011 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-26 11:53:29,011 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-26 11:53:29,011 INFO L513 LassoAnalysis]: Proved termination. [2023-11-26 11:53:29,012 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_~n) = 1*fibo2_~n Supporting invariants [] [2023-11-26 11:53:29,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2023-11-26 11:53:29,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:29,021 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-26 11:53:29,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:29,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:29,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:53:29,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:29,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:29,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-26 11:53:29,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:29,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:29,304 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 8 loop predicates [2023-11-26 11:53:29,304 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 58 states and 76 transitions. cyclomatic complexity: 20 Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:53:29,816 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 58 states and 76 transitions. cyclomatic complexity: 20. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Result 191 states and 263 transitions. Complement of second has 40 states. [2023-11-26 11:53:29,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2023-11-26 11:53:29,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:53:29,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 73 transitions. [2023-11-26 11:53:29,819 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 16 letters. Loop has 14 letters. [2023-11-26 11:53:29,819 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-26 11:53:29,820 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 30 letters. Loop has 14 letters. [2023-11-26 11:53:29,820 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-26 11:53:29,820 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 16 letters. Loop has 28 letters. [2023-11-26 11:53:29,821 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-26 11:53:29,821 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 191 states and 263 transitions. [2023-11-26 11:53:29,828 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2023-11-26 11:53:29,838 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 191 states to 169 states and 237 transitions. [2023-11-26 11:53:29,839 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 103 [2023-11-26 11:53:29,841 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 106 [2023-11-26 11:53:29,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 169 states and 237 transitions. [2023-11-26 11:53:29,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-26 11:53:29,845 INFO L218 hiAutomatonCegarLoop]: Abstraction has 169 states and 237 transitions. [2023-11-26 11:53:29,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states and 237 transitions. [2023-11-26 11:53:29,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 152. [2023-11-26 11:53:29,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 95 states have (on average 1.2842105263157895) internal successors, (122), 102 states have internal predecessors, (122), 35 states have call successors, (36), 19 states have call predecessors, (36), 22 states have return successors, (48), 30 states have call predecessors, (48), 33 states have call successors, (48) [2023-11-26 11:53:29,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 206 transitions. [2023-11-26 11:53:29,885 INFO L240 hiAutomatonCegarLoop]: Abstraction has 152 states and 206 transitions. [2023-11-26 11:53:29,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:29,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:53:29,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:53:29,886 INFO L87 Difference]: Start difference. First operand 152 states and 206 transitions. Second operand has 11 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:53:30,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:30,036 INFO L93 Difference]: Finished difference Result 183 states and 247 transitions. [2023-11-26 11:53:30,036 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 183 states and 247 transitions. [2023-11-26 11:53:30,046 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2023-11-26 11:53:30,057 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 183 states to 180 states and 243 transitions. [2023-11-26 11:53:30,057 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 117 [2023-11-26 11:53:30,059 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 117 [2023-11-26 11:53:30,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 180 states and 243 transitions. [2023-11-26 11:53:30,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-26 11:53:30,060 INFO L218 hiAutomatonCegarLoop]: Abstraction has 180 states and 243 transitions. [2023-11-26 11:53:30,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states and 243 transitions. [2023-11-26 11:53:30,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 165. [2023-11-26 11:53:30,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 102 states have (on average 1.2647058823529411) internal successors, (129), 111 states have internal predecessors, (129), 38 states have call successors, (40), 20 states have call predecessors, (40), 25 states have return successors, (56), 33 states have call predecessors, (56), 36 states have call successors, (56) [2023-11-26 11:53:30,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 225 transitions. [2023-11-26 11:53:30,080 INFO L240 hiAutomatonCegarLoop]: Abstraction has 165 states and 225 transitions. [2023-11-26 11:53:30,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:53:30,083 INFO L428 stractBuchiCegarLoop]: Abstraction has 165 states and 225 transitions. [2023-11-26 11:53:30,083 INFO L335 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2023-11-26 11:53:30,083 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 165 states and 225 transitions. [2023-11-26 11:53:30,088 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2023-11-26 11:53:30,088 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-26 11:53:30,088 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-26 11:53:30,091 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:30,091 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:30,091 INFO L748 eck$LassoCheckResult]: Stem: 1269#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(18, 2);call #Ultimate.allocInit(12, 3); 1239#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 4; 1240#L39 call main_#t~ret8#1 := fibo1(main_~x~0#1);< 1273#$Ultimate##0 ~n := #in~n; 1264#L10 assume !(~n < 1); 1257#L12 assume !(1 == ~n); 1226#L15 call #t~ret4 := fibo2(~n - 1);< 1265#$Ultimate##0 ~n := #in~n; 1267#L20 assume !(~n < 1); 1268#L22 assume !(1 == ~n); 1241#L25 call #t~ret6 := fibo1(~n - 1);< 1242#$Ultimate##0 ~n := #in~n; 1303#L10 assume !(~n < 1); 1308#L12 assume !(1 == ~n); 1310#L15 call #t~ret4 := fibo2(~n - 1);< 1316#$Ultimate##0 ~n := #in~n; 1319#L20 assume ~n < 1;#res := 0; 1317#fibo2FINAL assume true; 1315#fibo2EXIT >#52#return; 1313#L15-1 call #t~ret5 := fibo2(~n - 2);< 1314#$Ultimate##0 ~n := #in~n; 1321#L20 assume ~n < 1;#res := 0; 1318#fibo2FINAL assume true; 1312#fibo2EXIT >#54#return; 1311#L15-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1306#fibo1FINAL assume true; 1307#fibo1EXIT >#48#return; 1244#L25-1 call #t~ret7 := fibo1(~n - 2);< 1300#$Ultimate##0 ~n := #in~n; 1331#L10 assume ~n < 1;#res := 0; 1271#fibo1FINAL assume true; 1365#fibo1EXIT >#50#return; 1234#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 1245#fibo2FINAL assume true; 1258#fibo2EXIT >#52#return; 1203#L15-1 call #t~ret5 := fibo2(~n - 2);< 1329#$Ultimate##0 [2023-11-26 11:53:30,092 INFO L750 eck$LassoCheckResult]: Loop: 1329#$Ultimate##0 ~n := #in~n; 1323#L20 assume !(~n < 1); 1202#L22 assume !(1 == ~n); 1207#L25 call #t~ret6 := fibo1(~n - 1);< 1227#$Ultimate##0 ~n := #in~n; 1236#L10 assume !(~n < 1); 1263#L12 assume !(1 == ~n); 1204#L15 call #t~ret4 := fibo2(~n - 1);< 1329#$Ultimate##0 [2023-11-26 11:53:30,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:30,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1873386980, now seen corresponding path program 1 times [2023-11-26 11:53:30,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:30,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436773638] [2023-11-26 11:53:30,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:30,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:30,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:30,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:30,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-26 11:53:30,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:30,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 11:53:30,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:30,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 11:53:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:30,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-26 11:53:30,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:30,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-26 11:53:30,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:30,306 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-26 11:53:30,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:30,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436773638] [2023-11-26 11:53:30,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436773638] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:53:30,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74530167] [2023-11-26 11:53:30,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:30,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:30,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:30,308 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:30,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-26 11:53:30,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:30,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:53:30,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:30,483 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 11:53:30,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:30,896 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:53:30,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74530167] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:53:30,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:53:30,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 11] total 16 [2023-11-26 11:53:30,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705661640] [2023-11-26 11:53:30,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:30,898 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-26 11:53:30,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:30,898 INFO L85 PathProgramCache]: Analyzing trace with hash 996300776, now seen corresponding path program 2 times [2023-11-26 11:53:30,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:30,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087258414] [2023-11-26 11:53:30,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:30,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:30,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:53:30,903 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 11:53:30,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:53:30,906 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 11:53:31,019 INFO L210 LassoAnalysis]: Preferences: [2023-11-26 11:53:31,019 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-26 11:53:31,019 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-26 11:53:31,019 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-26 11:53:31,019 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-26 11:53:31,019 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:31,019 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-26 11:53:31,020 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-26 11:53:31,020 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-2.c_Iteration4_Loop [2023-11-26 11:53:31,020 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-26 11:53:31,020 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-26 11:53:31,021 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:31,025 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:31,036 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:31,038 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:31,040 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:31,043 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:31,045 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:31,056 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:31,112 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-26 11:53:31,112 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-26 11:53:31,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:31,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:31,114 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:31,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2023-11-26 11:53:31,116 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-26 11:53:31,116 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 11:53:31,128 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-26 11:53:31,128 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret7=0} Honda state: {fibo2_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-26 11:53:31,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:31,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:31,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:31,132 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:31,135 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-26 11:53:31,135 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 11:53:31,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2023-11-26 11:53:31,146 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-26 11:53:31,147 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret5=0} Honda state: {fibo1_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-26 11:53:31,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:31,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:31,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:31,150 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:31,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2023-11-26 11:53:31,153 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-26 11:53:31,153 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 11:53:31,165 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-26 11:53:31,165 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret6=0} Honda state: {fibo2_#t~ret6=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-26 11:53:31,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:31,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:31,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:31,169 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:31,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2023-11-26 11:53:31,172 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-26 11:53:31,172 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 11:53:31,185 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-26 11:53:31,185 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-26 11:53:31,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:31,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:31,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:31,189 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:31,199 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-26 11:53:31,199 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 11:53:31,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2023-11-26 11:53:31,212 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-26 11:53:31,213 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-26 11:53:31,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:31,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:31,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:31,217 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:31,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2023-11-26 11:53:31,219 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-26 11:53:31,219 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 11:53:31,231 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-26 11:53:31,231 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret4=0} Honda state: {fibo1_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-26 11:53:31,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:31,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:31,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:31,235 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:31,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2023-11-26 11:53:31,238 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-26 11:53:31,238 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 11:53:31,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:31,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:31,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:31,256 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:31,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2023-11-26 11:53:31,259 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-26 11:53:31,259 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 11:53:31,325 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-26 11:53:31,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:31,328 INFO L210 LassoAnalysis]: Preferences: [2023-11-26 11:53:31,328 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-26 11:53:31,328 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-26 11:53:31,328 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-26 11:53:31,328 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-26 11:53:31,328 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:31,328 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-26 11:53:31,328 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-26 11:53:31,329 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-2.c_Iteration4_Loop [2023-11-26 11:53:31,329 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-26 11:53:31,329 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-26 11:53:31,330 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:31,333 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:31,335 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:31,338 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:31,339 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:31,341 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:31,343 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:31,351 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:31,419 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-26 11:53:31,419 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-26 11:53:31,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:31,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:31,421 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:31,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2023-11-26 11:53:31,427 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 [2023-11-26 11:53:31,440 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-26 11:53:31,440 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-26 11:53:31,440 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-26 11:53:31,440 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-26 11:53:31,440 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-26 11:53:31,441 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-26 11:53:31,441 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-26 11:53:31,450 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-26 11:53:31,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:31,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:31,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:31,455 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:31,459 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 [2023-11-26 11:53:31,471 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-26 11:53:31,471 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-26 11:53:31,471 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-26 11:53:31,471 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-26 11:53:31,471 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-26 11:53:31,472 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-26 11:53:31,472 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-26 11:53:31,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2023-11-26 11:53:31,494 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-26 11:53:31,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:31,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:31,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:31,499 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:31,507 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 [2023-11-26 11:53:31,519 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-26 11:53:31,519 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-26 11:53:31,519 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-26 11:53:31,519 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-26 11:53:31,519 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-26 11:53:31,520 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-26 11:53:31,520 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-26 11:53:31,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2023-11-26 11:53:31,529 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-26 11:53:31,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:31,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:31,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:31,534 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:31,539 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 [2023-11-26 11:53:31,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Waiting until timeout for monitored process [2023-11-26 11:53:31,551 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-26 11:53:31,551 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-26 11:53:31,551 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-26 11:53:31,551 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-26 11:53:31,551 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-26 11:53:31,552 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-26 11:53:31,552 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-26 11:53:31,574 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-26 11:53:31,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:31,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:31,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:31,579 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:31,583 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 [2023-11-26 11:53:31,595 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-26 11:53:31,595 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-26 11:53:31,595 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-26 11:53:31,595 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-26 11:53:31,595 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-26 11:53:31,596 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-26 11:53:31,596 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-26 11:53:31,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Waiting until timeout for monitored process [2023-11-26 11:53:31,610 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-26 11:53:31,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:31,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:31,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:31,615 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:31,619 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 [2023-11-26 11:53:31,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Waiting until timeout for monitored process [2023-11-26 11:53:31,630 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-26 11:53:31,630 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-26 11:53:31,630 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-26 11:53:31,630 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-26 11:53:31,630 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-26 11:53:31,631 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-26 11:53:31,631 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-26 11:53:31,632 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-26 11:53:31,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Ended with exit code 0 [2023-11-26 11:53:31,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:31,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:31,636 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:31,643 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 [2023-11-26 11:53:31,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Waiting until timeout for monitored process [2023-11-26 11:53:31,654 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-26 11:53:31,654 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-26 11:53:31,655 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-26 11:53:31,655 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-26 11:53:31,655 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-26 11:53:31,656 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-26 11:53:31,656 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-26 11:53:31,665 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-26 11:53:31,668 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-26 11:53:31,668 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-26 11:53:31,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:31,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:31,672 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:31,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Waiting until timeout for monitored process [2023-11-26 11:53:31,673 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-26 11:53:31,673 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-26 11:53:31,673 INFO L513 LassoAnalysis]: Proved termination. [2023-11-26 11:53:31,674 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_#in~n) = 1*fibo2_#in~n Supporting invariants [] [2023-11-26 11:53:31,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:31,677 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-26 11:53:31,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:31,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-26 11:53:31,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:31,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Ended with exit code 0 [2023-11-26 11:53:32,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:32,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 11:53:32,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:32,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:32,173 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2023-11-26 11:53:32,173 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 165 states and 225 transitions. cyclomatic complexity: 65 Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-26 11:53:32,390 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 165 states and 225 transitions. cyclomatic complexity: 65. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Result 671 states and 941 transitions. Complement of second has 26 states. [2023-11-26 11:53:32,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2023-11-26 11:53:32,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-26 11:53:32,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 40 transitions. [2023-11-26 11:53:32,394 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 40 transitions. Stem has 36 letters. Loop has 8 letters. [2023-11-26 11:53:32,394 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-26 11:53:32,394 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-26 11:53:32,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:32,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:32,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-26 11:53:32,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:32,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:32,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 11:53:32,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:32,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:32,850 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 5 loop predicates [2023-11-26 11:53:32,851 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 165 states and 225 transitions. cyclomatic complexity: 65 Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-26 11:53:33,028 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 165 states and 225 transitions. cyclomatic complexity: 65. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Result 671 states and 941 transitions. Complement of second has 26 states. [2023-11-26 11:53:33,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2023-11-26 11:53:33,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-26 11:53:33,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 40 transitions. [2023-11-26 11:53:33,030 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 40 transitions. Stem has 36 letters. Loop has 8 letters. [2023-11-26 11:53:33,030 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-26 11:53:33,030 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-26 11:53:33,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:33,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-26 11:53:33,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:33,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:33,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 11:53:33,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:33,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:33,497 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 5 loop predicates [2023-11-26 11:53:33,498 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 165 states and 225 transitions. cyclomatic complexity: 65 Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-26 11:53:33,687 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 165 states and 225 transitions. cyclomatic complexity: 65. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Result 553 states and 762 transitions. Complement of second has 25 states. [2023-11-26 11:53:33,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2023-11-26 11:53:33,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-26 11:53:33,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2023-11-26 11:53:33,691 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 36 letters. Loop has 8 letters. [2023-11-26 11:53:33,694 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-26 11:53:33,695 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 44 letters. Loop has 8 letters. [2023-11-26 11:53:33,695 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-26 11:53:33,695 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 36 letters. Loop has 16 letters. [2023-11-26 11:53:33,696 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-26 11:53:33,696 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 553 states and 762 transitions. [2023-11-26 11:53:33,705 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 56 [2023-11-26 11:53:33,713 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 553 states to 445 states and 639 transitions. [2023-11-26 11:53:33,714 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 195 [2023-11-26 11:53:33,714 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 226 [2023-11-26 11:53:33,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 445 states and 639 transitions. [2023-11-26 11:53:33,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-26 11:53:33,715 INFO L218 hiAutomatonCegarLoop]: Abstraction has 445 states and 639 transitions. [2023-11-26 11:53:33,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states and 639 transitions. [2023-11-26 11:53:33,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 370. [2023-11-26 11:53:33,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 246 states have (on average 1.2845528455284554) internal successors, (316), 269 states have internal predecessors, (316), 71 states have call successors, (74), 55 states have call predecessors, (74), 53 states have return successors, (117), 45 states have call predecessors, (117), 69 states have call successors, (117) [2023-11-26 11:53:33,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 507 transitions. [2023-11-26 11:53:33,743 INFO L240 hiAutomatonCegarLoop]: Abstraction has 370 states and 507 transitions. [2023-11-26 11:53:33,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:33,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 11:53:33,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:53:33,744 INFO L87 Difference]: Start difference. First operand 370 states and 507 transitions. Second operand has 16 states, 14 states have (on average 3.142857142857143) internal successors, (44), 15 states have internal predecessors, (44), 11 states have call successors, (15), 3 states have call predecessors, (15), 5 states have return successors, (12), 3 states have call predecessors, (12), 10 states have call successors, (12) [2023-11-26 11:53:34,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:34,075 INFO L93 Difference]: Finished difference Result 449 states and 635 transitions. [2023-11-26 11:53:34,075 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 449 states and 635 transitions. [2023-11-26 11:53:34,085 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 60 [2023-11-26 11:53:34,091 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 449 states to 410 states and 591 transitions. [2023-11-26 11:53:34,092 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 228 [2023-11-26 11:53:34,093 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 229 [2023-11-26 11:53:34,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 410 states and 591 transitions. [2023-11-26 11:53:34,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-26 11:53:34,094 INFO L218 hiAutomatonCegarLoop]: Abstraction has 410 states and 591 transitions. [2023-11-26 11:53:34,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states and 591 transitions. [2023-11-26 11:53:34,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 359. [2023-11-26 11:53:34,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 233 states have (on average 1.240343347639485) internal successors, (289), 261 states have internal predecessors, (289), 74 states have call successors, (77), 50 states have call predecessors, (77), 52 states have return successors, (130), 47 states have call predecessors, (130), 72 states have call successors, (130) [2023-11-26 11:53:34,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 496 transitions. [2023-11-26 11:53:34,120 INFO L240 hiAutomatonCegarLoop]: Abstraction has 359 states and 496 transitions. [2023-11-26 11:53:34,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 11:53:34,121 INFO L428 stractBuchiCegarLoop]: Abstraction has 359 states and 496 transitions. [2023-11-26 11:53:34,121 INFO L335 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2023-11-26 11:53:34,121 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 359 states and 496 transitions. [2023-11-26 11:53:34,124 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 60 [2023-11-26 11:53:34,125 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-26 11:53:34,125 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-26 11:53:34,128 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:34,128 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1] [2023-11-26 11:53:34,128 INFO L748 eck$LassoCheckResult]: Stem: 4978#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(18, 2);call #Ultimate.allocInit(12, 3); 4943#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 4; 4944#L39 call main_#t~ret8#1 := fibo1(main_~x~0#1);< 4981#$Ultimate##0 ~n := #in~n; 5106#L10 assume !(~n < 1); 5105#L12 assume !(1 == ~n); 5096#L15 call #t~ret4 := fibo2(~n - 1);< 5104#$Ultimate##0 ~n := #in~n; 5103#L20 assume !(~n < 1); 5102#L22 assume !(1 == ~n); 4954#L25 call #t~ret6 := fibo1(~n - 1);< 5094#$Ultimate##0 ~n := #in~n; 5095#L10 assume !(~n < 1); 5131#L12 assume !(1 == ~n); 5088#L15 call #t~ret4 := fibo2(~n - 1);< 5129#$Ultimate##0 ~n := #in~n; 5134#L20 assume !(~n < 1); 5133#L22 assume 1 == ~n;#res := 1; 5130#fibo2FINAL assume true; 5128#fibo2EXIT >#52#return; 4952#L15-1 call #t~ret5 := fibo2(~n - 2);< 4956#$Ultimate##0 ~n := #in~n; 5141#L20 assume ~n < 1;#res := 0; 5140#fibo2FINAL assume true; 5139#fibo2EXIT >#54#return; 5138#L15-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 5137#fibo1FINAL assume true; 5136#fibo1EXIT >#48#return; 5078#L25-1 call #t~ret7 := fibo1(~n - 2);< 5114#$Ultimate##0 ~n := #in~n; 5231#L10 assume ~n < 1;#res := 0; 5230#fibo1FINAL assume true; 5165#fibo1EXIT >#50#return; 5166#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 5185#fibo2FINAL assume true; 5184#fibo2EXIT >#52#return; 5112#L15-1 call #t~ret5 := fibo2(~n - 2);< 5113#$Ultimate##0 [2023-11-26 11:53:34,129 INFO L750 eck$LassoCheckResult]: Loop: 5113#$Ultimate##0 ~n := #in~n; 5181#L20 assume !(~n < 1); 5180#L22 assume !(1 == ~n); 4941#L25 call #t~ret6 := fibo1(~n - 1);< 5122#$Ultimate##0 ~n := #in~n; 5124#L10 assume !(~n < 1); 5125#L12 assume !(1 == ~n); 5118#L15 call #t~ret4 := fibo2(~n - 1);< 5153#$Ultimate##0 ~n := #in~n; 5181#L20 assume !(~n < 1); 5180#L22 assume !(1 == ~n); 4941#L25 call #t~ret6 := fibo1(~n - 1);< 5122#$Ultimate##0 ~n := #in~n; 5124#L10 assume !(~n < 1); 5125#L12 assume !(1 == ~n); 5118#L15 call #t~ret4 := fibo2(~n - 1);< 5153#$Ultimate##0 ~n := #in~n; 5182#L20 assume !(~n < 1); 5207#L22 assume 1 == ~n;#res := 1; 5206#fibo2FINAL assume true; 5195#fibo2EXIT >#52#return; 5119#L15-1 call #t~ret5 := fibo2(~n - 2);< 5113#$Ultimate##0 ~n := #in~n; 5183#L20 assume ~n < 1;#res := 0; 5224#fibo2FINAL assume true; 5193#fibo2EXIT >#54#return; 5148#L15-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 5190#fibo1FINAL assume true; 5186#fibo1EXIT >#48#return; 5156#L25-1 call #t~ret7 := fibo1(~n - 2);< 5189#$Ultimate##0 ~n := #in~n; 5162#L10 assume !(~n < 1); 5164#L12 assume !(1 == ~n); 5147#L15 call #t~ret4 := fibo2(~n - 1);< 5157#$Ultimate##0 ~n := #in~n; 5194#L20 assume !(~n < 1); 5191#L22 assume !(1 == ~n); 5155#L25 call #t~ret6 := fibo1(~n - 1);< 5189#$Ultimate##0 ~n := #in~n; 5162#L10 assume !(~n < 1); 5164#L12 assume !(1 == ~n); 5147#L15 call #t~ret4 := fibo2(~n - 1);< 5157#$Ultimate##0 ~n := #in~n; 5194#L20 assume !(~n < 1); 5191#L22 assume 1 == ~n;#res := 1; 5192#fibo2FINAL assume true; 5196#fibo2EXIT >#52#return; 5119#L15-1 call #t~ret5 := fibo2(~n - 2);< 5113#$Ultimate##0 ~n := #in~n; 5183#L20 assume ~n < 1;#res := 0; 5224#fibo2FINAL assume true; 5193#fibo2EXIT >#54#return; 5148#L15-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 5190#fibo1FINAL assume true; 5186#fibo1EXIT >#48#return; 5156#L25-1 call #t~ret7 := fibo1(~n - 2);< 5189#$Ultimate##0 ~n := #in~n; 5162#L10 assume ~n < 1;#res := 0; 5163#fibo1FINAL assume true; 5188#fibo1EXIT >#50#return; 5187#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 5152#fibo2FINAL assume true; 5145#fibo2EXIT >#52#return; 5119#L15-1 call #t~ret5 := fibo2(~n - 2);< 5113#$Ultimate##0 ~n := #in~n; 5183#L20 assume ~n < 1;#res := 0; 5224#fibo2FINAL assume true; 5193#fibo2EXIT >#54#return; 5148#L15-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 5190#fibo1FINAL assume true; 5186#fibo1EXIT >#50#return; 5187#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 5152#fibo2FINAL assume true; 5145#fibo2EXIT >#52#return; 5119#L15-1 call #t~ret5 := fibo2(~n - 2);< 5113#$Ultimate##0 [2023-11-26 11:53:34,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:34,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1302122831, now seen corresponding path program 1 times [2023-11-26 11:53:34,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:34,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975661480] [2023-11-26 11:53:34,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:34,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:34,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:34,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-26 11:53:34,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:34,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 11:53:34,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:34,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 11:53:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:34,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 11:53:34,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:34,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-26 11:53:34,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:34,343 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-26 11:53:34,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:34,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975661480] [2023-11-26 11:53:34,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975661480] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:53:34,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974712741] [2023-11-26 11:53:34,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:34,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:34,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:34,345 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:34,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-11-26 11:53:34,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:34,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:53:34,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:34,470 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:53:34,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:34,703 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:53:34,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974712741] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:53:34,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:53:34,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 16 [2023-11-26 11:53:34,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368869115] [2023-11-26 11:53:34,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:34,705 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-26 11:53:34,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:34,706 INFO L85 PathProgramCache]: Analyzing trace with hash -96284739, now seen corresponding path program 1 times [2023-11-26 11:53:34,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:34,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926589001] [2023-11-26 11:53:34,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:34,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:34,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:34,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 11:53:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:34,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 11:53:34,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:34,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 11:53:34,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:34,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 11:53:34,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:34,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-26 11:53:34,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:35,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 11:53:35,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:35,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 11:53:35,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:35,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 11:53:35,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:35,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 11:53:35,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:35,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-26 11:53:35,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:35,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-26 11:53:35,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:35,106 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 34 proven. 36 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-11-26 11:53:35,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:35,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926589001] [2023-11-26 11:53:35,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926589001] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:53:35,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038310590] [2023-11-26 11:53:35,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:35,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:35,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:35,111 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:35,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-11-26 11:53:35,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:35,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:53:35,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-26 11:53:35,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-26 11:53:35,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038310590] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:53:35,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:53:35,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2023-11-26 11:53:35,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639610167] [2023-11-26 11:53:35,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:35,791 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-11-26 11:53:35,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:35,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 11:53:35,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:53:35,793 INFO L87 Difference]: Start difference. First operand 359 states and 496 transitions. cyclomatic complexity: 144 Second operand has 16 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 14 states have internal predecessors, (37), 8 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-26 11:53:35,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:35,989 INFO L93 Difference]: Finished difference Result 387 states and 546 transitions. [2023-11-26 11:53:35,989 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 387 states and 546 transitions. [2023-11-26 11:53:35,996 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 60 [2023-11-26 11:53:36,002 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 387 states to 387 states and 546 transitions. [2023-11-26 11:53:36,003 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 209 [2023-11-26 11:53:36,003 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 209 [2023-11-26 11:53:36,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 387 states and 546 transitions. [2023-11-26 11:53:36,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-26 11:53:36,004 INFO L218 hiAutomatonCegarLoop]: Abstraction has 387 states and 546 transitions. [2023-11-26 11:53:36,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states and 546 transitions. [2023-11-26 11:53:36,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 369. [2023-11-26 11:53:36,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 238 states have (on average 1.2352941176470589) internal successors, (294), 269 states have internal predecessors, (294), 75 states have call successors, (78), 50 states have call predecessors, (78), 56 states have return successors, (136), 49 states have call predecessors, (136), 73 states have call successors, (136) [2023-11-26 11:53:36,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 508 transitions. [2023-11-26 11:53:36,023 INFO L240 hiAutomatonCegarLoop]: Abstraction has 369 states and 508 transitions. [2023-11-26 11:53:36,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:53:36,024 INFO L428 stractBuchiCegarLoop]: Abstraction has 369 states and 508 transitions. [2023-11-26 11:53:36,024 INFO L335 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2023-11-26 11:53:36,024 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 369 states and 508 transitions. [2023-11-26 11:53:36,027 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 60 [2023-11-26 11:53:36,028 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-26 11:53:36,028 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-26 11:53:36,029 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:36,029 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:36,030 INFO L748 eck$LassoCheckResult]: Stem: 6699#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(18, 2);call #Ultimate.allocInit(12, 3); 6651#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 4; 6652#L39 call main_#t~ret8#1 := fibo1(main_~x~0#1);< 6702#$Ultimate##0 ~n := #in~n; 6751#L10 assume !(~n < 1); 6750#L12 assume !(1 == ~n); 6701#L15 call #t~ret4 := fibo2(~n - 1);< 6748#$Ultimate##0 ~n := #in~n; 6747#L20 assume !(~n < 1); 6743#L22 assume !(1 == ~n); 6663#L25 call #t~ret6 := fibo1(~n - 1);< 6739#$Ultimate##0 ~n := #in~n; 6731#L10 assume !(~n < 1); 6732#L12 assume !(1 == ~n); 6718#L15 call #t~ret4 := fibo2(~n - 1);< 6719#$Ultimate##0 ~n := #in~n; 6737#L20 assume !(~n < 1); 6738#L22 assume !(1 == ~n); 6662#L25 call #t~ret6 := fibo1(~n - 1);< 6739#$Ultimate##0 ~n := #in~n; 6745#L10 assume !(~n < 1); 6835#L12 assume 1 == ~n;#res := 1; 6834#fibo1FINAL assume true; 6833#fibo1EXIT >#48#return; 6766#L25-1 call #t~ret7 := fibo1(~n - 2);< 6814#$Ultimate##0 ~n := #in~n; 6966#L10 assume ~n < 1;#res := 0; 6967#fibo1FINAL assume true; 6983#fibo1EXIT >#50#return; 6647#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 6915#fibo2FINAL assume true; 6841#fibo2EXIT >#52#return; 6695#L15-1 [2023-11-26 11:53:36,030 INFO L750 eck$LassoCheckResult]: Loop: 6695#L15-1 call #t~ret5 := fibo2(~n - 2);< 6828#$Ultimate##0 ~n := #in~n; 6692#L20 assume !(~n < 1); 6698#L22 assume !(1 == ~n); 6649#L25 call #t~ret6 := fibo1(~n - 1);< 6822#$Ultimate##0 ~n := #in~n; 6920#L10 assume !(~n < 1); 6858#L12 assume !(1 == ~n); 6694#L15 call #t~ret4 := fibo2(~n - 1);< 6854#$Ultimate##0 ~n := #in~n; 6864#L20 assume !(~n < 1); 6875#L22 assume !(1 == ~n); 6876#L25 call #t~ret6 := fibo1(~n - 1);< 6897#$Ultimate##0 ~n := #in~n; 6900#L10 assume !(~n < 1); 6898#L12 assume 1 == ~n;#res := 1; 6894#fibo1FINAL assume true; 6895#fibo1EXIT >#48#return; 6881#L25-1 call #t~ret7 := fibo1(~n - 2);< 6882#$Ultimate##0 ~n := #in~n; 6901#L10 assume ~n < 1;#res := 0; 6899#fibo1FINAL assume true; 6880#fibo1EXIT >#50#return; 6874#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 6870#fibo2FINAL assume true; 6866#fibo2EXIT >#52#return; 6695#L15-1 [2023-11-26 11:53:36,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:36,031 INFO L85 PathProgramCache]: Analyzing trace with hash -658151768, now seen corresponding path program 1 times [2023-11-26 11:53:36,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:36,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362512178] [2023-11-26 11:53:36,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:36,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:36,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:36,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-26 11:53:36,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:36,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 11:53:36,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:36,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 11:53:36,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:53:36,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:36,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362512178] [2023-11-26 11:53:36,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362512178] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:53:36,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956753310] [2023-11-26 11:53:36,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:36,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:36,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:36,208 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:36,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-11-26 11:53:36,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:36,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:53:36,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:36,366 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:53:36,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:36,606 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:53:36,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956753310] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:53:36,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:53:36,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 17 [2023-11-26 11:53:36,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883433673] [2023-11-26 11:53:36,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:36,611 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-26 11:53:36,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:36,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1404661389, now seen corresponding path program 1 times [2023-11-26 11:53:36,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:36,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730799669] [2023-11-26 11:53:36,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:36,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:36,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:53:36,625 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 11:53:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:53:36,635 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 11:53:36,967 INFO L210 LassoAnalysis]: Preferences: [2023-11-26 11:53:36,967 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-26 11:53:36,967 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-26 11:53:36,967 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-26 11:53:36,967 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-26 11:53:36,967 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:36,967 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-26 11:53:36,967 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-26 11:53:36,967 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-2.c_Iteration6_Loop [2023-11-26 11:53:36,967 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-26 11:53:36,967 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-26 11:53:36,968 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:36,971 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:36,975 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:36,977 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:36,980 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:36,986 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:36,988 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:36,990 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:36,993 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:37,042 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-26 11:53:37,043 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-26 11:53:37,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:37,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:37,047 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:37,055 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-26 11:53:37,056 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 11:53:37,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Waiting until timeout for monitored process [2023-11-26 11:53:37,078 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-26 11:53:37,078 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#in~n=0} Honda state: {fibo2_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-26 11:53:37,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:37,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:37,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:37,083 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:37,091 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-26 11:53:37,091 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 11:53:37,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Waiting until timeout for monitored process [2023-11-26 11:53:37,105 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-26 11:53:37,105 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-26 11:53:37,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:37,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:37,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:37,110 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:37,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Waiting until timeout for monitored process [2023-11-26 11:53:37,115 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-26 11:53:37,115 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 11:53:37,127 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-26 11:53:37,127 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret5=0} Honda state: {fibo1_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-26 11:53:37,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Ended with exit code 0 [2023-11-26 11:53:37,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:37,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:37,131 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:37,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Waiting until timeout for monitored process [2023-11-26 11:53:37,133 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-26 11:53:37,133 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 11:53:37,145 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-26 11:53:37,145 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#in~n=3} Honda state: {fibo1_#in~n=3} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-26 11:53:37,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Ended with exit code 0 [2023-11-26 11:53:37,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:37,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:37,149 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:37,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Waiting until timeout for monitored process [2023-11-26 11:53:37,152 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-26 11:53:37,152 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 11:53:37,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Ended with exit code 0 [2023-11-26 11:53:37,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:37,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:37,168 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:37,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Waiting until timeout for monitored process [2023-11-26 11:53:37,171 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-26 11:53:37,171 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 11:53:37,185 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-26 11:53:37,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:37,188 INFO L210 LassoAnalysis]: Preferences: [2023-11-26 11:53:37,188 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-26 11:53:37,188 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-26 11:53:37,188 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-26 11:53:37,188 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-26 11:53:37,188 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:37,188 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-26 11:53:37,188 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-26 11:53:37,188 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-2.c_Iteration6_Loop [2023-11-26 11:53:37,188 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-26 11:53:37,188 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-26 11:53:37,189 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:37,191 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:37,194 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:37,198 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:37,200 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:37,213 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:37,216 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:37,219 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:37,222 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:37,276 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-26 11:53:37,277 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-26 11:53:37,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:37,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:37,279 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:37,287 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-26 11:53:37,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Waiting until timeout for monitored process [2023-11-26 11:53:37,300 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-26 11:53:37,300 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-26 11:53:37,300 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-26 11:53:37,300 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-26 11:53:37,301 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-26 11:53:37,301 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-26 11:53:37,301 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-26 11:53:37,312 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-26 11:53:37,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Ended with exit code 0 [2023-11-26 11:53:37,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:37,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:37,316 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:37,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Waiting until timeout for monitored process [2023-11-26 11:53:37,318 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 [2023-11-26 11:53:37,328 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-26 11:53:37,328 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-26 11:53:37,329 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-26 11:53:37,329 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-26 11:53:37,329 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-26 11:53:37,330 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-26 11:53:37,330 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-26 11:53:37,354 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-26 11:53:37,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:37,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:37,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:37,360 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:37,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Waiting until timeout for monitored process [2023-11-26 11:53:37,362 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 [2023-11-26 11:53:37,372 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-26 11:53:37,372 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-26 11:53:37,372 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-26 11:53:37,372 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-26 11:53:37,373 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-26 11:53:37,373 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-26 11:53:37,373 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-26 11:53:37,376 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-26 11:53:37,379 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-26 11:53:37,379 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-26 11:53:37,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:37,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:37,383 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:37,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (61)] Waiting until timeout for monitored process [2023-11-26 11:53:37,391 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-26 11:53:37,391 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-26 11:53:37,391 INFO L513 LassoAnalysis]: Proved termination. [2023-11-26 11:53:37,391 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2023-11-26 11:53:37,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Ended with exit code 0 [2023-11-26 11:53:37,394 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-26 11:53:37,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:37,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:37,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 11:53:37,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:37,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:37,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-26 11:53:37,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:37,889 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:53:37,889 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 10 loop predicates [2023-11-26 11:53:37,890 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 369 states and 508 transitions. cyclomatic complexity: 146 Second operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 7 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-26 11:53:38,416 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 369 states and 508 transitions. cyclomatic complexity: 146. Second operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 7 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 1744 states and 2390 transitions. Complement of second has 46 states. [2023-11-26 11:53:38,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 13 states 2 stem states 10 non-accepting loop states 1 accepting loop states [2023-11-26 11:53:38,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (61)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:38,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 7 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-26 11:53:38,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 68 transitions. [2023-11-26 11:53:38,419 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 13 states and 68 transitions. Stem has 32 letters. Loop has 26 letters. [2023-11-26 11:53:38,420 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-26 11:53:38,420 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 13 states and 68 transitions. Stem has 58 letters. Loop has 26 letters. [2023-11-26 11:53:38,420 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-26 11:53:38,420 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 13 states and 68 transitions. Stem has 32 letters. Loop has 52 letters. [2023-11-26 11:53:38,421 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-26 11:53:38,421 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1744 states and 2390 transitions. [2023-11-26 11:53:38,446 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 143 [2023-11-26 11:53:38,471 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1744 states to 1582 states and 2212 transitions. [2023-11-26 11:53:38,472 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 538 [2023-11-26 11:53:38,473 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 572 [2023-11-26 11:53:38,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1582 states and 2212 transitions. [2023-11-26 11:53:38,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-26 11:53:38,474 INFO L218 hiAutomatonCegarLoop]: Abstraction has 1582 states and 2212 transitions. [2023-11-26 11:53:38,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states and 2212 transitions. [2023-11-26 11:53:38,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1505. [2023-11-26 11:53:38,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 954 states have (on average 1.2348008385744236) internal successors, (1178), 1084 states have internal predecessors, (1178), 316 states have call successors, (331), 191 states have call predecessors, (331), 235 states have return successors, (597), 229 states have call predecessors, (597), 314 states have call successors, (597) [2023-11-26 11:53:38,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 2106 transitions. [2023-11-26 11:53:38,537 INFO L240 hiAutomatonCegarLoop]: Abstraction has 1505 states and 2106 transitions. [2023-11-26 11:53:38,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:38,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-26 11:53:38,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2023-11-26 11:53:38,539 INFO L87 Difference]: Start difference. First operand 1505 states and 2106 transitions. Second operand has 18 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-26 11:53:38,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:38,796 INFO L93 Difference]: Finished difference Result 1604 states and 1988 transitions. [2023-11-26 11:53:38,796 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1604 states and 1988 transitions. [2023-11-26 11:53:38,819 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 147 [2023-11-26 11:53:38,827 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1604 states to 594 states and 683 transitions. [2023-11-26 11:53:38,827 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 289 [2023-11-26 11:53:38,828 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 289 [2023-11-26 11:53:38,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 594 states and 683 transitions. [2023-11-26 11:53:38,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-26 11:53:38,829 INFO L218 hiAutomatonCegarLoop]: Abstraction has 594 states and 683 transitions. [2023-11-26 11:53:38,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states and 683 transitions. [2023-11-26 11:53:38,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 482. [2023-11-26 11:53:38,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 315 states have (on average 1.1587301587301588) internal successors, (365), 352 states have internal predecessors, (365), 99 states have call successors, (101), 76 states have call predecessors, (101), 68 states have return successors, (83), 53 states have call predecessors, (83), 65 states have call successors, (83) [2023-11-26 11:53:38,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 549 transitions. [2023-11-26 11:53:38,845 INFO L240 hiAutomatonCegarLoop]: Abstraction has 482 states and 549 transitions. [2023-11-26 11:53:38,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 11:53:38,846 INFO L428 stractBuchiCegarLoop]: Abstraction has 482 states and 549 transitions. [2023-11-26 11:53:38,846 INFO L335 stractBuchiCegarLoop]: ======== Iteration 7 ============ [2023-11-26 11:53:38,846 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 482 states and 549 transitions. [2023-11-26 11:53:38,850 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 102 [2023-11-26 11:53:38,850 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-26 11:53:38,850 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-26 11:53:38,851 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:38,851 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:38,852 INFO L748 eck$LassoCheckResult]: Stem: 12400#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(18, 2);call #Ultimate.allocInit(12, 3); 12375#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 4; 12376#L39 call main_#t~ret8#1 := fibo1(main_~x~0#1);< 12406#$Ultimate##0 ~n := #in~n; 12435#L10 assume !(~n < 1); 12433#L12 assume !(1 == ~n); 12385#L15 call #t~ret4 := fibo2(~n - 1);< 12427#$Ultimate##0 ~n := #in~n; 12422#L20 assume !(~n < 1); 12418#L22 assume !(1 == ~n); 12413#L25 call #t~ret6 := fibo1(~n - 1);< 12415#$Ultimate##0 ~n := #in~n; 12437#L10 assume !(~n < 1); 12440#L12 assume !(1 == ~n); 12430#L15 call #t~ret4 := fibo2(~n - 1);< 12431#$Ultimate##0 ~n := #in~n; 12443#L20 assume !(~n < 1); 12442#L22 assume 1 == ~n;#res := 1; 12439#fibo2FINAL assume true; 12429#fibo2EXIT >#52#return; 12424#L15-1 call #t~ret5 := fibo2(~n - 2);< 12425#$Ultimate##0 ~n := #in~n; 12438#L20 assume ~n < 1;#res := 0; 12428#fibo2FINAL assume true; 12423#fibo2EXIT >#54#return; 12419#L15-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 12416#fibo1FINAL assume true; 12411#fibo1EXIT >#48#return; 12408#L25-1 call #t~ret7 := fibo1(~n - 2);< 12410#$Ultimate##0 ~n := #in~n; 12475#L10 assume !(~n < 1); 12472#L12 assume 1 == ~n;#res := 1; 12473#fibo1FINAL assume true; 12407#fibo1EXIT >#50#return; 12384#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 12386#fibo2FINAL assume true; 12635#fibo2EXIT >#52#return; 12455#L15-1 [2023-11-26 11:53:38,852 INFO L750 eck$LassoCheckResult]: Loop: 12455#L15-1 call #t~ret5 := fibo2(~n - 2);< 12466#$Ultimate##0 ~n := #in~n; 12462#L20 assume !(~n < 1); 12460#L22 assume !(1 == ~n); 12447#L25 call #t~ret6 := fibo1(~n - 1);< 12457#$Ultimate##0 ~n := #in~n; 12552#L10 assume !(~n < 1); 12551#L12 assume 1 == ~n;#res := 1; 12550#fibo1FINAL assume true; 12502#fibo1EXIT >#48#return; 12469#L25-1 call #t~ret7 := fibo1(~n - 2);< 12496#$Ultimate##0 ~n := #in~n; 12495#L10 assume !(~n < 1); 12494#L12 assume !(1 == ~n); 12456#L15 call #t~ret4 := fibo2(~n - 1);< 12464#$Ultimate##0 ~n := #in~n; 12465#L20 assume !(~n < 1); 12532#L22 assume 1 == ~n;#res := 1; 12528#fibo2FINAL assume true; 12482#fibo2EXIT >#52#return; 12455#L15-1 [2023-11-26 11:53:38,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:38,852 INFO L85 PathProgramCache]: Analyzing trace with hash -562711824, now seen corresponding path program 1 times [2023-11-26 11:53:38,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:38,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034148682] [2023-11-26 11:53:38,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:38,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:38,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:53:38,859 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 11:53:38,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:53:38,867 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 11:53:38,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:38,868 INFO L85 PathProgramCache]: Analyzing trace with hash -303531802, now seen corresponding path program 1 times [2023-11-26 11:53:38,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:38,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121898206] [2023-11-26 11:53:38,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:38,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:38,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:38,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-26 11:53:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:38,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-26 11:53:38,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:38,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:53:38,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:38,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121898206] [2023-11-26 11:53:38,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121898206] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:53:38,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151175840] [2023-11-26 11:53:38,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:38,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:38,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:38,919 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:38,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-11-26 11:53:38,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:38,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:53:38,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:38,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:38,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:39,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:53:39,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151175840] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:53:39,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:53:39,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2023-11-26 11:53:39,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733629189] [2023-11-26 11:53:39,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:39,058 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-11-26 11:53:39,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:39,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:53:39,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:53:39,059 INFO L87 Difference]: Start difference. First operand 482 states and 549 transitions. cyclomatic complexity: 81 Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:53:39,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:39,120 INFO L93 Difference]: Finished difference Result 326 states and 353 transitions. [2023-11-26 11:53:39,121 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 326 states and 353 transitions. [2023-11-26 11:53:39,125 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 62 [2023-11-26 11:53:39,136 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 326 states to 271 states and 298 transitions. [2023-11-26 11:53:39,136 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 147 [2023-11-26 11:53:39,136 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 149 [2023-11-26 11:53:39,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 271 states and 298 transitions. [2023-11-26 11:53:39,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-26 11:53:39,137 INFO L218 hiAutomatonCegarLoop]: Abstraction has 271 states and 298 transitions. [2023-11-26 11:53:39,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states and 298 transitions. [2023-11-26 11:53:39,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2023-11-26 11:53:39,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 181 states have (on average 1.1049723756906078) internal successors, (200), 196 states have internal predecessors, (200), 56 states have call successors, (57), 44 states have call predecessors, (57), 34 states have return successors, (41), 30 states have call predecessors, (41), 40 states have call successors, (41) [2023-11-26 11:53:39,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 298 transitions. [2023-11-26 11:53:39,146 INFO L240 hiAutomatonCegarLoop]: Abstraction has 271 states and 298 transitions. [2023-11-26 11:53:39,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:53:39,148 INFO L428 stractBuchiCegarLoop]: Abstraction has 271 states and 298 transitions. [2023-11-26 11:53:39,148 INFO L335 stractBuchiCegarLoop]: ======== Iteration 8 ============ [2023-11-26 11:53:39,148 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 271 states and 298 transitions. [2023-11-26 11:53:39,151 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 62 [2023-11-26 11:53:39,151 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-26 11:53:39,151 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-26 11:53:39,152 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:39,152 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:39,154 INFO L748 eck$LassoCheckResult]: Stem: 13352#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(18, 2);call #Ultimate.allocInit(12, 3); 13325#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 4; 13326#L39 call main_#t~ret8#1 := fibo1(main_~x~0#1);< 13354#$Ultimate##0 ~n := #in~n; 13388#L10 assume !(~n < 1); 13386#L12 assume !(1 == ~n); 13339#L15 call #t~ret4 := fibo2(~n - 1);< 13380#$Ultimate##0 ~n := #in~n; 13375#L20 assume !(~n < 1); 13371#L22 assume !(1 == ~n); 13366#L25 call #t~ret6 := fibo1(~n - 1);< 13368#$Ultimate##0 ~n := #in~n; 13390#L10 assume !(~n < 1); 13393#L12 assume !(1 == ~n); 13383#L15 call #t~ret4 := fibo2(~n - 1);< 13384#$Ultimate##0 ~n := #in~n; 13395#L20 assume !(~n < 1); 13394#L22 assume 1 == ~n;#res := 1; 13392#fibo2FINAL assume true; 13382#fibo2EXIT >#52#return; 13377#L15-1 call #t~ret5 := fibo2(~n - 2);< 13378#$Ultimate##0 ~n := #in~n; 13391#L20 assume ~n < 1;#res := 0; 13381#fibo2FINAL assume true; 13376#fibo2EXIT >#54#return; 13372#L15-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 13369#fibo1FINAL assume true; 13364#fibo1EXIT >#48#return; 13361#L25-1 call #t~ret7 := fibo1(~n - 2);< 13362#$Ultimate##0 ~n := #in~n; 13435#L10 assume !(~n < 1); 13434#L12 assume !(1 == ~n); 13431#L15 call #t~ret4 := fibo2(~n - 1);< 13433#$Ultimate##0 ~n := #in~n; 13444#L20 assume !(~n < 1); 13442#L22 assume 1 == ~n;#res := 1; 13443#fibo2FINAL assume true; 13430#fibo2EXIT >#52#return; 13404#L15-1 [2023-11-26 11:53:39,155 INFO L750 eck$LassoCheckResult]: Loop: 13404#L15-1 call #t~ret5 := fibo2(~n - 2);< 13415#$Ultimate##0 ~n := #in~n; 13411#L20 assume !(~n < 1); 13408#L22 assume !(1 == ~n); 13398#L25 call #t~ret6 := fibo1(~n - 1);< 13405#$Ultimate##0 ~n := #in~n; 13420#L10 assume !(~n < 1); 13418#L12 assume !(1 == ~n); 13403#L15 call #t~ret4 := fibo2(~n - 1);< 13413#$Ultimate##0 ~n := #in~n; 13414#L20 assume !(~n < 1); 13452#L22 assume 1 == ~n;#res := 1; 13447#fibo2FINAL assume true; 13432#fibo2EXIT >#52#return; 13404#L15-1 [2023-11-26 11:53:39,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:39,156 INFO L85 PathProgramCache]: Analyzing trace with hash 794867286, now seen corresponding path program 1 times [2023-11-26 11:53:39,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:39,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060967771] [2023-11-26 11:53:39,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:39,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:39,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:39,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 11:53:39,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:39,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 11:53:39,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:39,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 11:53:39,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:39,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-26 11:53:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:39,279 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-26 11:53:39,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:39,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060967771] [2023-11-26 11:53:39,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060967771] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:53:39,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464605840] [2023-11-26 11:53:39,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:39,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:39,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:39,281 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:39,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-11-26 11:53:39,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:39,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:53:39,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:39,408 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 11:53:39,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:39,529 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 11:53:39,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464605840] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:53:39,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:53:39,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2023-11-26 11:53:39,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059799748] [2023-11-26 11:53:39,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:39,530 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-26 11:53:39,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:39,531 INFO L85 PathProgramCache]: Analyzing trace with hash -815837104, now seen corresponding path program 1 times [2023-11-26 11:53:39,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:39,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807030919] [2023-11-26 11:53:39,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:39,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:39,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:53:39,534 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 11:53:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:53:39,537 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 11:53:39,729 INFO L210 LassoAnalysis]: Preferences: [2023-11-26 11:53:39,729 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-26 11:53:39,729 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-26 11:53:39,729 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-26 11:53:39,729 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-26 11:53:39,730 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:39,730 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-26 11:53:39,730 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-26 11:53:39,730 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-2.c_Iteration8_Loop [2023-11-26 11:53:39,730 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-26 11:53:39,730 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-26 11:53:39,731 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:39,736 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:39,738 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:39,741 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:39,744 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:39,746 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:39,749 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:39,751 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:39,754 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:39,825 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-26 11:53:39,826 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-26 11:53:39,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:39,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:39,831 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:39,832 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-26 11:53:39,833 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 11:53:39,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (64)] Waiting until timeout for monitored process [2023-11-26 11:53:39,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (64)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:39,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:39,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:39,859 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:39,863 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-26 11:53:39,863 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 11:53:39,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (65)] Waiting until timeout for monitored process [2023-11-26 11:53:39,901 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-26 11:53:39,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (65)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:39,905 INFO L210 LassoAnalysis]: Preferences: [2023-11-26 11:53:39,905 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-26 11:53:39,905 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-26 11:53:39,905 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-26 11:53:39,905 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-26 11:53:39,905 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:39,905 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-26 11:53:39,905 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-26 11:53:39,905 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-2.c_Iteration8_Loop [2023-11-26 11:53:39,905 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-26 11:53:39,905 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-26 11:53:39,906 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:39,911 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:39,913 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:39,916 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:39,918 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:39,920 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:39,923 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:39,925 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:39,927 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:39,974 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-26 11:53:39,974 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-26 11:53:39,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:39,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:39,976 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:39,987 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-26 11:53:39,999 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-26 11:53:40,000 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-26 11:53:40,000 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-26 11:53:40,000 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-26 11:53:40,000 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-26 11:53:40,001 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-26 11:53:40,001 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-26 11:53:40,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (66)] Waiting until timeout for monitored process [2023-11-26 11:53:40,018 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-26 11:53:40,022 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-26 11:53:40,022 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-26 11:53:40,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:40,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:40,026 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:40,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (67)] Waiting until timeout for monitored process [2023-11-26 11:53:40,029 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-26 11:53:40,029 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-26 11:53:40,029 INFO L513 LassoAnalysis]: Proved termination. [2023-11-26 11:53:40,029 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2023-11-26 11:53:40,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (66)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:40,034 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-26 11:53:40,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:40,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:40,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-26 11:53:40,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:40,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:40,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-26 11:53:40,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:40,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:40,436 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 8 loop predicates [2023-11-26 11:53:40,436 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 271 states and 298 transitions. cyclomatic complexity: 35 Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-26 11:53:40,798 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 271 states and 298 transitions. cyclomatic complexity: 35. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Result 422 states and 463 transitions. Complement of second has 40 states. [2023-11-26 11:53:40,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2023-11-26 11:53:40,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-26 11:53:40,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 50 transitions. [2023-11-26 11:53:40,808 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 50 transitions. Stem has 38 letters. Loop has 14 letters. [2023-11-26 11:53:40,809 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-26 11:53:40,809 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-26 11:53:40,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:40,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:40,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-26 11:53:40,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:41,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:41,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-26 11:53:41,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:41,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:41,247 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 8 loop predicates [2023-11-26 11:53:41,248 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 271 states and 298 transitions. cyclomatic complexity: 35 Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-26 11:53:41,495 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 271 states and 298 transitions. cyclomatic complexity: 35. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Result 344 states and 375 transitions. Complement of second has 26 states. [2023-11-26 11:53:41,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2023-11-26 11:53:41,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-26 11:53:41,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 31 transitions. [2023-11-26 11:53:41,497 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 31 transitions. Stem has 38 letters. Loop has 14 letters. [2023-11-26 11:53:41,497 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-26 11:53:41,497 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-26 11:53:41,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:41,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:41,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-26 11:53:41,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:41,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (67)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:41,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:41,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-26 11:53:41,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:41,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:41,918 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 8 loop predicates [2023-11-26 11:53:41,918 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 271 states and 298 transitions. cyclomatic complexity: 35 Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-26 11:53:42,280 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 271 states and 298 transitions. cyclomatic complexity: 35. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Result 1102 states and 1208 transitions. Complement of second has 102 states. [2023-11-26 11:53:42,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2023-11-26 11:53:42,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-26 11:53:42,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 61 transitions. [2023-11-26 11:53:42,282 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 61 transitions. Stem has 38 letters. Loop has 14 letters. [2023-11-26 11:53:42,283 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-26 11:53:42,283 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 61 transitions. Stem has 52 letters. Loop has 14 letters. [2023-11-26 11:53:42,284 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-26 11:53:42,284 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 61 transitions. Stem has 38 letters. Loop has 28 letters. [2023-11-26 11:53:42,285 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-26 11:53:42,285 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1102 states and 1208 transitions. [2023-11-26 11:53:42,295 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 162 [2023-11-26 11:53:42,300 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1102 states to 538 states and 595 transitions. [2023-11-26 11:53:42,301 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 252 [2023-11-26 11:53:42,301 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 270 [2023-11-26 11:53:42,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 538 states and 595 transitions. [2023-11-26 11:53:42,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-26 11:53:42,302 INFO L218 hiAutomatonCegarLoop]: Abstraction has 538 states and 595 transitions. [2023-11-26 11:53:42,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states and 595 transitions. [2023-11-26 11:53:42,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 419. [2023-11-26 11:53:42,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 281 states have (on average 1.092526690391459) internal successors, (307), 301 states have internal predecessors, (307), 82 states have call successors, (87), 70 states have call predecessors, (87), 56 states have return successors, (62), 47 states have call predecessors, (62), 61 states have call successors, (62) [2023-11-26 11:53:42,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 456 transitions. [2023-11-26 11:53:42,315 INFO L240 hiAutomatonCegarLoop]: Abstraction has 419 states and 456 transitions. [2023-11-26 11:53:42,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:42,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 11:53:42,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:53:42,316 INFO L87 Difference]: Start difference. First operand 419 states and 456 transitions. Second operand has 13 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-26 11:53:42,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:42,443 INFO L93 Difference]: Finished difference Result 229 states and 241 transitions. [2023-11-26 11:53:42,443 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 229 states and 241 transitions. [2023-11-26 11:53:42,449 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 20 [2023-11-26 11:53:42,450 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 229 states to 83 states and 86 transitions. [2023-11-26 11:53:42,450 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 35 [2023-11-26 11:53:42,450 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 43 [2023-11-26 11:53:42,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 86 transitions. [2023-11-26 11:53:42,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-26 11:53:42,451 INFO L218 hiAutomatonCegarLoop]: Abstraction has 83 states and 86 transitions. [2023-11-26 11:53:42,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states and 86 transitions. [2023-11-26 11:53:42,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 66. [2023-11-26 11:53:42,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 47 states have internal predecessors, (48), 13 states have call successors, (13), 12 states have call predecessors, (13), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-26 11:53:42,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2023-11-26 11:53:42,453 INFO L240 hiAutomatonCegarLoop]: Abstraction has 66 states and 68 transitions. [2023-11-26 11:53:42,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 11:53:42,455 INFO L428 stractBuchiCegarLoop]: Abstraction has 66 states and 68 transitions. [2023-11-26 11:53:42,455 INFO L335 stractBuchiCegarLoop]: ======== Iteration 9 ============ [2023-11-26 11:53:42,455 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 66 states and 68 transitions. [2023-11-26 11:53:42,456 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 20 [2023-11-26 11:53:42,456 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-26 11:53:42,456 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-26 11:53:42,457 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:42,457 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2023-11-26 11:53:42,458 INFO L748 eck$LassoCheckResult]: Stem: 17104#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(18, 2);call #Ultimate.allocInit(12, 3); 17091#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 4; 17092#L39 call main_#t~ret8#1 := fibo1(main_~x~0#1);< 17105#$Ultimate##0 ~n := #in~n; 17120#L10 assume !(~n < 1); 17117#L12 assume !(1 == ~n); 17083#L15 call #t~ret4 := fibo2(~n - 1);< 17113#$Ultimate##0 ~n := #in~n; 17111#L20 assume !(~n < 1); 17109#L22 assume !(1 == ~n); 17087#L25 call #t~ret6 := fibo1(~n - 1);< 17086#$Ultimate##0 ~n := #in~n; 17088#L10 assume !(~n < 1); 17095#L12 assume !(1 == ~n); 17076#L15 call #t~ret4 := fibo2(~n - 1);< 17075#$Ultimate##0 ~n := #in~n; 17077#L20 assume !(~n < 1); 17103#L22 assume 1 == ~n;#res := 1; 17122#fibo2FINAL assume true; 17119#fibo2EXIT >#52#return; 17115#L15-1 call #t~ret5 := fibo2(~n - 2);< 17116#$Ultimate##0 ~n := #in~n; 17121#L20 assume ~n < 1;#res := 0; 17118#fibo2FINAL assume true; 17114#fibo2EXIT >#54#return; 17106#L15-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 17107#fibo1FINAL assume true; 17108#fibo1EXIT >#48#return; 17081#L25-1 call #t~ret7 := fibo1(~n - 2);< 17084#$Ultimate##0 ~n := #in~n; 17112#L10 assume !(~n < 1); 17110#L12 assume 1 == ~n;#res := 1; 17080#fibo1FINAL assume true; 17082#fibo1EXIT >#50#return; 17085#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 17093#fibo2FINAL assume true; 17099#fibo2EXIT >#52#return; 17072#L15-1 [2023-11-26 11:53:42,458 INFO L750 eck$LassoCheckResult]: Loop: 17072#L15-1 call #t~ret5 := fibo2(~n - 2);< 17078#$Ultimate##0 ~n := #in~n; 17079#L20 assume !(~n < 1); 17071#L22 assume !(1 == ~n); 17074#L25 call #t~ret6 := fibo1(~n - 1);< 17089#$Ultimate##0 ~n := #in~n; 17090#L10 assume !(~n < 1); 17096#L12 assume !(1 == ~n); 17097#L15 call #t~ret4 := fibo2(~n - 1);< 17102#$Ultimate##0 ~n := #in~n; 17125#L20 assume !(~n < 1); 17132#L22 assume !(1 == ~n); 17094#L25 call #t~ret6 := fibo1(~n - 1);< 17131#$Ultimate##0 ~n := #in~n; 17130#L10 assume !(~n < 1); 17128#L12 assume !(1 == ~n); 17069#L15 call #t~ret4 := fibo2(~n - 1);< 17124#$Ultimate##0 ~n := #in~n; 17123#L20 assume !(~n < 1); 17068#L22 assume 1 == ~n;#res := 1; 17070#fibo2FINAL assume true; 17133#fibo2EXIT >#52#return; 17072#L15-1 [2023-11-26 11:53:42,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:42,458 INFO L85 PathProgramCache]: Analyzing trace with hash -562711824, now seen corresponding path program 2 times [2023-11-26 11:53:42,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:42,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811190108] [2023-11-26 11:53:42,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:42,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:42,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:53:42,467 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 11:53:42,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:53:42,480 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 11:53:42,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:42,482 INFO L85 PathProgramCache]: Analyzing trace with hash 878078665, now seen corresponding path program 2 times [2023-11-26 11:53:42,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:42,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533694193] [2023-11-26 11:53:42,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:42,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:42,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:53:42,487 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 11:53:42,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:53:42,492 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 11:53:42,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:42,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1575530616, now seen corresponding path program 3 times [2023-11-26 11:53:42,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:42,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375890737] [2023-11-26 11:53:42,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:42,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:42,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:42,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-26 11:53:42,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:42,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 11:53:42,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:42,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 11:53:42,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:42,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 11:53:42,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:42,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-26 11:53:42,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:42,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-26 11:53:42,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:42,623 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 48 proven. 13 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-26 11:53:42,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:42,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375890737] [2023-11-26 11:53:42,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375890737] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:53:42,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905019334] [2023-11-26 11:53:42,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:53:42,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:42,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:42,627 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:42,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-11-26 11:53:42,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-26 11:53:42,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:53:42,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 11:53:42,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:42,811 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 60 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-26 11:53:42,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 60 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-26 11:53:43,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905019334] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:53:43,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:53:43,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 24 [2023-11-26 11:53:43,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720417520] [2023-11-26 11:53:43,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:43,425 INFO L210 LassoAnalysis]: Preferences: [2023-11-26 11:53:43,426 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-26 11:53:43,426 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-26 11:53:43,426 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-26 11:53:43,426 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-26 11:53:43,426 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:43,426 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-26 11:53:43,426 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-26 11:53:43,426 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-2.c_Iteration9_Loop [2023-11-26 11:53:43,426 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-26 11:53:43,426 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-26 11:53:43,427 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:43,432 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:43,434 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:43,436 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:43,438 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:43,441 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:43,444 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:43,446 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:43,449 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:43,499 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-26 11:53:43,500 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-26 11:53:43,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:43,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:43,507 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:43,515 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-26 11:53:43,516 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 11:53:43,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (69)] Waiting until timeout for monitored process [2023-11-26 11:53:43,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (69)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:43,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:43,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:43,551 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:43,555 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-26 11:53:43,555 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-26 11:53:43,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (70)] Waiting until timeout for monitored process [2023-11-26 11:53:43,582 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-26 11:53:43,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (70)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:43,585 INFO L210 LassoAnalysis]: Preferences: [2023-11-26 11:53:43,586 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-26 11:53:43,586 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-26 11:53:43,586 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-26 11:53:43,586 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-26 11:53:43,586 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:43,586 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-26 11:53:43,586 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-26 11:53:43,586 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_4-2.c_Iteration9_Loop [2023-11-26 11:53:43,586 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-26 11:53:43,586 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-26 11:53:43,587 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:43,595 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:43,598 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:43,600 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:43,602 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:43,604 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:43,606 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:43,608 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:43,610 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-26 11:53:43,663 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-26 11:53:43,663 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-26 11:53:43,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:43,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:43,664 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:43,671 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 [2023-11-26 11:53:43,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (71)] Waiting until timeout for monitored process [2023-11-26 11:53:43,682 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-26 11:53:43,682 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-26 11:53:43,683 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-26 11:53:43,683 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-26 11:53:43,683 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-26 11:53:43,684 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-26 11:53:43,684 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-26 11:53:43,693 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-26 11:53:43,697 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-26 11:53:43,697 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-26 11:53:43,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-26 11:53:43,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:43,702 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:43,707 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-26 11:53:43,707 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-26 11:53:43,707 INFO L513 LassoAnalysis]: Proved termination. [2023-11-26 11:53:43,707 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2023-11-26 11:53:43,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (72)] Waiting until timeout for monitored process [2023-11-26 11:53:43,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (71)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:43,712 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-26 11:53:43,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:43,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:43,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 11:53:43,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:44,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:44,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-26 11:53:44,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:44,258 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:44,258 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 12 loop predicates [2023-11-26 11:53:44,258 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 66 states and 68 transitions. cyclomatic complexity: 3 Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 8 states have internal predecessors, (34), 7 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-26 11:53:44,374 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 66 states and 68 transitions. cyclomatic complexity: 3. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 8 states have internal predecessors, (34), 7 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Result 73 states and 75 transitions. Complement of second has 11 states. [2023-11-26 11:53:44,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2023-11-26 11:53:44,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 8 states have internal predecessors, (34), 7 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-26 11:53:44,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2023-11-26 11:53:44,377 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 37 letters. Loop has 22 letters. [2023-11-26 11:53:44,377 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-26 11:53:44,378 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-26 11:53:44,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:44,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 11:53:44,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:44,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:44,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-26 11:53:44,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:44,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (72)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:44,973 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:44,973 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 12 loop predicates [2023-11-26 11:53:44,973 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 66 states and 68 transitions. cyclomatic complexity: 3 Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 8 states have internal predecessors, (34), 7 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-26 11:53:45,106 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 66 states and 68 transitions. cyclomatic complexity: 3. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 8 states have internal predecessors, (34), 7 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Result 73 states and 75 transitions. Complement of second has 11 states. [2023-11-26 11:53:45,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2023-11-26 11:53:45,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 8 states have internal predecessors, (34), 7 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-26 11:53:45,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2023-11-26 11:53:45,107 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 37 letters. Loop has 22 letters. [2023-11-26 11:53:45,108 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-26 11:53:45,108 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-26 11:53:45,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:45,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:45,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 11:53:45,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:45,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:45,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-26 11:53:45,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:45,657 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:45,658 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 12 loop predicates [2023-11-26 11:53:45,658 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 66 states and 68 transitions. cyclomatic complexity: 3 Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 8 states have internal predecessors, (34), 7 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-26 11:53:46,004 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 66 states and 68 transitions. cyclomatic complexity: 3. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 8 states have internal predecessors, (34), 7 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Result 192 states and 200 transitions. Complement of second has 91 states. [2023-11-26 11:53:46,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2023-11-26 11:53:46,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 8 states have internal predecessors, (34), 7 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-26 11:53:46,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 53 transitions. [2023-11-26 11:53:46,007 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 53 transitions. Stem has 37 letters. Loop has 22 letters. [2023-11-26 11:53:46,008 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-26 11:53:46,008 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-26 11:53:46,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:46,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:46,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 11:53:46,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:46,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:46,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-26 11:53:46,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:46,567 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 12 loop predicates [2023-11-26 11:53:46,567 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 66 states and 68 transitions. cyclomatic complexity: 3 Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 8 states have internal predecessors, (34), 7 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-26 11:53:47,117 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 66 states and 68 transitions. cyclomatic complexity: 3. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 8 states have internal predecessors, (34), 7 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Result 107 states and 112 transitions. Complement of second has 35 states. [2023-11-26 11:53:47,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 14 states 2 stem states 11 non-accepting loop states 1 accepting loop states [2023-11-26 11:53:47,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 8 states have internal predecessors, (34), 7 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-26 11:53:47,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 51 transitions. [2023-11-26 11:53:47,119 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 51 transitions. Stem has 37 letters. Loop has 22 letters. [2023-11-26 11:53:47,120 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-26 11:53:47,120 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 51 transitions. Stem has 59 letters. Loop has 22 letters. [2023-11-26 11:53:47,120 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-26 11:53:47,120 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 51 transitions. Stem has 37 letters. Loop has 44 letters. [2023-11-26 11:53:47,121 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-26 11:53:47,121 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 107 states and 112 transitions. [2023-11-26 11:53:47,129 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-11-26 11:53:47,130 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 107 states to 0 states and 0 transitions. [2023-11-26 11:53:47,130 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2023-11-26 11:53:47,130 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2023-11-26 11:53:47,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2023-11-26 11:53:47,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:47,131 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-26 11:53:47,131 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-26 11:53:47,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:47,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 11:53:47,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2023-11-26 11:53:47,133 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand has 24 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 16 states have internal predecessors, (54), 12 states have call successors, (20), 10 states have call predecessors, (20), 2 states have return successors, (9), 4 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-26 11:53:47,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:47,133 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2023-11-26 11:53:47,133 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2023-11-26 11:53:47,134 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-11-26 11:53:47,134 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2023-11-26 11:53:47,134 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2023-11-26 11:53:47,134 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2023-11-26 11:53:47,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2023-11-26 11:53:47,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:47,134 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-26 11:53:47,134 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-26 11:53:47,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:53:47,135 INFO L428 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-26 11:53:47,135 INFO L335 stractBuchiCegarLoop]: ======== Iteration 10 ============ [2023-11-26 11:53:47,135 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2023-11-26 11:53:47,135 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-11-26 11:53:47,136 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2023-11-26 11:53:47,144 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 26.11 11:53:47 BoogieIcfgContainer [2023-11-26 11:53:47,145 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2023-11-26 11:53:47,145 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-26 11:53:47,145 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-26 11:53:47,146 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-26 11:53:47,146 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:53:24" (3/4) ... [2023-11-26 11:53:47,148 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-26 11:53:47,149 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-26 11:53:47,150 INFO L158 Benchmark]: Toolchain (without parser) took 23089.41ms. Allocated memory was 169.9MB in the beginning and 308.3MB in the end (delta: 138.4MB). Free memory was 138.2MB in the beginning and 259.4MB in the end (delta: -121.2MB). Peak memory consumption was 18.7MB. Max. memory is 16.1GB. [2023-11-26 11:53:47,150 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 117.4MB. Free memory is still 72.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 11:53:47,151 INFO L158 Benchmark]: CACSL2BoogieTranslator took 227.03ms. Allocated memory is still 169.9MB. Free memory was 137.8MB in the beginning and 127.7MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-26 11:53:47,151 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.51ms. Allocated memory is still 169.9MB. Free memory was 127.7MB in the beginning and 126.1MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 11:53:47,152 INFO L158 Benchmark]: Boogie Preprocessor took 45.10ms. Allocated memory is still 169.9MB. Free memory was 126.1MB in the beginning and 124.3MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 11:53:47,153 INFO L158 Benchmark]: RCFGBuilder took 419.22ms. Allocated memory is still 169.9MB. Free memory was 124.3MB in the beginning and 114.2MB in the end (delta: 10.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-26 11:53:47,153 INFO L158 Benchmark]: BuchiAutomizer took 22352.76ms. Allocated memory was 169.9MB in the beginning and 308.3MB in the end (delta: 138.4MB). Free memory was 114.2MB in the beginning and 259.4MB in the end (delta: -145.2MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 11:53:47,153 INFO L158 Benchmark]: Witness Printer took 4.18ms. Allocated memory is still 308.3MB. Free memory is still 259.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 11:53:47,155 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 117.4MB. Free memory is still 72.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 227.03ms. Allocated memory is still 169.9MB. Free memory was 137.8MB in the beginning and 127.7MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.51ms. Allocated memory is still 169.9MB. Free memory was 127.7MB in the beginning and 126.1MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 45.10ms. Allocated memory is still 169.9MB. Free memory was 126.1MB in the beginning and 124.3MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 419.22ms. Allocated memory is still 169.9MB. Free memory was 124.3MB in the beginning and 114.2MB in the end (delta: 10.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * BuchiAutomizer took 22352.76ms. Allocated memory was 169.9MB in the beginning and 308.3MB in the end (delta: 138.4MB). Free memory was 114.2MB in the beginning and 259.4MB in the end (delta: -145.2MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 4.18ms. Allocated memory is still 308.3MB. Free memory is still 259.4MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 14 terminating modules (8 trivial, 3 deterministic, 3 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 7 locations. One deterministic module has affine ranking function n and consists of 12 locations. One deterministic module has affine ranking function n and consists of 13 locations. One nondeterministic module has affine ranking function \old(n) and consists of 8 locations. One nondeterministic module has affine ranking function n and consists of 12 locations. One nondeterministic module has affine ranking function n and consists of 14 locations. 8 modules have a trivial ranking function, the largest among these consists of 24 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 22.2s and 10 iterations. TraceHistogramMax:8. Analysis of lassos took 10.3s. Construction of modules took 2.0s. Büchi inclusion checks took 9.4s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 12. Automata minimization 0.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 516 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 [3, 0, 2, 1, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 9/33 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 959 SdHoareTripleChecker+Valid, 2.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 928 mSDsluCounter, 1503 SdHoareTripleChecker+Invalid, 2.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1041 mSDsCounter, 443 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2477 IncrementalHoareTripleChecker+Invalid, 2920 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 443 mSolverCounterUnsat, 462 mSDtfsCounter, 2477 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT1 conc0 concLT1 SILN0 SILU0 SILI2 SILT4 lasso0 LassoPreprocessingBenchmarks: Lassos: inital15 mio100 ax100 hnf100 lsp71 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq192 hnf90 smp82 dnf100 smp100 tf113 neg100 sie103 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 46ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 22 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 6 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.1s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2023-11-26 11:53:47,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:47,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2023-11-26 11:53:47,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:47,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-11-26 11:53:47,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-11-26 11:53:48,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-11-26 11:53:48,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-26 11:53:48,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:48,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facb1d85-3f99-4abd-865b-9c7f9b6b8b0d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE