./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_7-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 9bd2c7ff 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_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_7-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu --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 17c70baee0bc6a4a26b6403fb6f46125ad9d7f8a7127109634f2327c61aaf5cb --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:43:56,853 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:43:56,977 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Termination-32bit-Automizer_Default.epf [2023-11-19 07:43:56,985 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:43:56,985 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:43:57,030 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:43:57,033 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:43:57,034 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:43:57,035 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:43:57,040 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:43:57,041 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:43:57,041 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2023-11-19 07:43:57,042 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2023-11-19 07:43:57,043 INFO L153 SettingsManager]: * Use old map elimination=false [2023-11-19 07:43:57,044 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2023-11-19 07:43:57,044 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2023-11-19 07:43:57,045 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2023-11-19 07:43:57,046 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:43:57,046 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2023-11-19 07:43:57,046 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:43:57,047 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:43:57,047 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:43:57,048 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:43:57,048 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2023-11-19 07:43:57,049 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2023-11-19 07:43:57,049 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2023-11-19 07:43:57,050 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:43:57,050 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:43:57,050 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:43:57,051 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2023-11-19 07:43:57,052 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:43:57,061 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:43:57,061 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:43:57,062 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:43:57,062 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:43:57,063 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2023-11-19 07:43:57,063 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_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 17c70baee0bc6a4a26b6403fb6f46125ad9d7f8a7127109634f2327c61aaf5cb [2023-11-19 07:43:57,373 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:43:57,411 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:43:57,414 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:43:57,416 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:43:57,417 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:43:57,418 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/recursive-simple/fibo_7-1.c [2023-11-19 07:44:00,686 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:44:00,899 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:44:00,900 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/sv-benchmarks/c/recursive-simple/fibo_7-1.c [2023-11-19 07:44:00,908 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/data/fe8329199/adae3ceb82af4d21910400912dd39ca7/FLAG6d099f461 [2023-11-19 07:44:00,932 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/data/fe8329199/adae3ceb82af4d21910400912dd39ca7 [2023-11-19 07:44:00,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:44:00,937 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:44:00,938 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:44:00,939 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:44:00,945 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:44:00,946 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:44:00" (1/1) ... [2023-11-19 07:44:00,948 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65c0df72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:00, skipping insertion in model container [2023-11-19 07:44:00,948 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:44:00" (1/1) ... [2023-11-19 07:44:00,972 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:44:01,200 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:44:01,223 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:44:01,247 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:44:01,267 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:44:01,268 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:01 WrapperNode [2023-11-19 07:44:01,268 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:44:01,271 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:44:01,271 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:44:01,272 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:44:01,282 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:01" (1/1) ... [2023-11-19 07:44:01,293 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:01" (1/1) ... [2023-11-19 07:44:01,315 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 20 [2023-11-19 07:44:01,316 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:44:01,317 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:44:01,318 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:44:01,318 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:44:01,332 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:01" (1/1) ... [2023-11-19 07:44:01,332 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:01" (1/1) ... [2023-11-19 07:44:01,334 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:01" (1/1) ... [2023-11-19 07:44:01,336 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:01" (1/1) ... [2023-11-19 07:44:01,341 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:01" (1/1) ... [2023-11-19 07:44:01,343 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:01" (1/1) ... [2023-11-19 07:44:01,345 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:01" (1/1) ... [2023-11-19 07:44:01,346 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:01" (1/1) ... [2023-11-19 07:44:01,353 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:44:01,355 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:44:01,355 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:44:01,356 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:44:01,357 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:01" (1/1) ... [2023-11-19 07:44:01,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:44:01,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:01,399 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:44:01,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2023-11-19 07:44:01,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:44:01,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:44:01,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:44:01,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:44:01,456 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2023-11-19 07:44:01,457 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2023-11-19 07:44:01,541 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:44:01,544 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:44:01,656 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:44:01,665 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:44:01,666 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 07:44:01,669 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:44:01 BoogieIcfgContainer [2023-11-19 07:44:01,669 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:44:01,671 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2023-11-19 07:44:01,671 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2023-11-19 07:44:01,676 INFO L274 PluginConnector]: BuchiAutomizer initialized [2023-11-19 07:44:01,677 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-19 07:44:01,678 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.11 07:44:00" (1/3) ... [2023-11-19 07:44:01,679 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2a395950 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.11 07:44:01, skipping insertion in model container [2023-11-19 07:44:01,679 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-19 07:44:01,680 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:01" (2/3) ... [2023-11-19 07:44:01,680 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2a395950 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.11 07:44:01, skipping insertion in model container [2023-11-19 07:44:01,680 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-19 07:44:01,681 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:44:01" (3/3) ... [2023-11-19 07:44:01,683 INFO L332 chiAutomizerObserver]: Analyzing ICFG fibo_7-1.c [2023-11-19 07:44:01,780 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2023-11-19 07:44:01,780 INFO L304 stractBuchiCegarLoop]: Hoare is false [2023-11-19 07:44:01,780 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2023-11-19 07:44:01,781 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2023-11-19 07:44:01,781 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2023-11-19 07:44:01,781 INFO L308 stractBuchiCegarLoop]: Difference is false [2023-11-19 07:44:01,781 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2023-11-19 07:44:01,782 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2023-11-19 07:44:01,787 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:44:01,833 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-19 07:44:01,834 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:44:01,835 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:44:01,843 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-11-19 07:44:01,843 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2023-11-19 07:44:01,843 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2023-11-19 07:44:01,844 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:44:01,849 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-19 07:44:01,849 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:44:01,849 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:44:01,850 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-11-19 07:44:01,850 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2023-11-19 07:44:01,863 INFO L748 eck$LassoCheckResult]: Stem: 17#$Ultimate##0true assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(11, 2);call #Ultimate.allocInit(12, 3); 9#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 7; 4#L27true call main_#t~ret6#1 := fibo(main_~x~0#1);< 11#$Ultimate##0true [2023-11-19 07:44:01,864 INFO L750 eck$LassoCheckResult]: Loop: 11#$Ultimate##0true ~n := #in~n; 5#L8true assume !(~n < 1); 7#L10true assume !(1 == ~n); 13#L13true call #t~ret4 := fibo(~n - 1);< 11#$Ultimate##0true [2023-11-19 07:44:01,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:01,870 INFO L85 PathProgramCache]: Analyzing trace with hash 29885, now seen corresponding path program 1 times [2023-11-19 07:44:01,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:01,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425121739] [2023-11-19 07:44:01,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:01,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:02,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:44:02,001 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:44:02,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:44:02,057 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:44:02,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:02,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1512524, now seen corresponding path program 1 times [2023-11-19 07:44:02,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:02,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269598604] [2023-11-19 07:44:02,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:02,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:02,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:44:02,087 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:44:02,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:44:02,104 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:44:02,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:02,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1830210312, now seen corresponding path program 1 times [2023-11-19 07:44:02,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:02,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094270852] [2023-11-19 07:44:02,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:02,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:02,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:44:02,134 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:44:02,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:44:02,162 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:44:02,371 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:44:02,372 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:44:02,373 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:44:02,373 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:44:02,373 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 07:44:02,373 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:44:02,374 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:44:02,374 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:44:02,374 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration1_Loop [2023-11-19 07:44:02,374 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:44:02,375 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:44:02,391 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:44:02,402 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:44:02,406 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:44:02,410 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:44:02,422 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:44:02,502 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:44:02,503 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 07:44:02,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:44:02,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:02,512 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:44:02,521 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:44:02,521 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:44:02,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2023-11-19 07:44:02,551 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:44:02,551 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret5=0} Honda state: {fibo_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:44:02,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:02,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:44:02,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:02,572 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:44:02,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2023-11-19 07:44:02,586 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:44:02,586 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:44:02,629 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:44:02,629 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:44:02,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:02,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:44:02,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:02,667 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:44:02,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2023-11-19 07:44:02,674 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:44:02,674 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:44:02,691 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:44:02,691 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:44:02,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:02,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:44:02,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:02,708 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:44:02,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2023-11-19 07:44:02,712 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:44:02,712 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:44:02,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:02,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:44:02,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:02,754 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:44:02,759 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 07:44:02,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2023-11-19 07:44:02,759 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:44:02,883 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-19 07:44:02,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Ended with exit code 0 [2023-11-19 07:44:02,889 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:44:02,889 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:44:02,890 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:44:02,890 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:44:02,890 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-19 07:44:02,890 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:44:02,890 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:44:02,890 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:44:02,891 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration1_Loop [2023-11-19 07:44:02,891 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:44:02,891 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:44:02,893 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:44:02,898 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:44:02,903 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:44:02,909 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:44:02,920 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:44:02,996 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:44:03,003 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-19 07:44:03,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:44:03,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:03,008 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:44:03,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2023-11-19 07:44:03,012 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 [2023-11-19 07:44:03,025 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:44:03,025 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:44:03,026 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:44:03,026 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:44:03,026 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:44:03,029 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:44:03,029 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:44:03,053 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:44:03,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:03,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:44:03,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:03,067 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:44:03,071 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 [2023-11-19 07:44:03,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2023-11-19 07:44:03,082 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:44:03,082 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:44:03,082 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:44:03,082 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:44:03,083 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:44:03,083 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:44:03,083 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:44:03,091 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:44:03,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:03,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:44:03,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:03,105 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:44:03,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2023-11-19 07:44:03,108 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 [2023-11-19 07:44:03,118 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:44:03,118 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:44:03,118 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:44:03,118 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:44:03,118 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:44:03,119 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:44:03,119 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:44:03,121 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:44:03,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:03,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:44:03,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:03,136 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:44:03,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2023-11-19 07:44:03,138 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 [2023-11-19 07:44:03,148 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:44:03,148 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:44:03,149 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:44:03,149 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:44:03,149 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:44:03,150 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:44:03,150 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:44:03,158 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-19 07:44:03,163 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-19 07:44:03,163 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-19 07:44:03,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:44:03,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:03,201 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:44:03,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2023-11-19 07:44:03,203 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-19 07:44:03,203 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-19 07:44:03,203 INFO L513 LassoAnalysis]: Proved termination. [2023-11-19 07:44:03,204 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2023-11-19 07:44:03,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:03,219 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-19 07:44:03,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:03,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:03,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:44:03,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:03,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:44:03,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:03,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:44:03,405 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2023-11-19 07:44:03,408 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:03,558 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3). Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 49 states and 61 transitions. Complement of second has 12 states. [2023-11-19 07:44:03,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2023-11-19 07:44:03,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:03,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2023-11-19 07:44:03,570 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2023-11-19 07:44:03,572 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:44:03,572 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2023-11-19 07:44:03,572 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:44:03,572 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2023-11-19 07:44:03,573 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:44:03,573 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 49 states and 61 transitions. [2023-11-19 07:44:03,579 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-19 07:44:03,586 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 49 states to 25 states and 34 transitions. [2023-11-19 07:44:03,587 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2023-11-19 07:44:03,587 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2023-11-19 07:44:03,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2023-11-19 07:44:03,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:44:03,588 INFO L218 hiAutomatonCegarLoop]: Abstraction has 25 states and 34 transitions. [2023-11-19 07:44:03,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2023-11-19 07:44:03,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2023-11-19 07:44:03,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Ended with exit code 0 [2023-11-19 07:44:03,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-19 07:44:03,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2023-11-19 07:44:03,654 INFO L240 hiAutomatonCegarLoop]: Abstraction has 20 states and 26 transitions. [2023-11-19 07:44:03,655 INFO L428 stractBuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2023-11-19 07:44:03,655 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2023-11-19 07:44:03,655 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2023-11-19 07:44:03,659 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-19 07:44:03,659 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:44:03,683 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:44:03,685 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:03,685 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:03,686 INFO L748 eck$LassoCheckResult]: Stem: 138#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(11, 2);call #Ultimate.allocInit(12, 3); 139#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 7; 124#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 123#$Ultimate##0 ~n := #in~n; 125#L8 assume !(~n < 1); 137#L10 assume !(1 == ~n); 127#L13 call #t~ret4 := fibo(~n - 1);< 126#$Ultimate##0 ~n := #in~n; 128#L8 assume ~n < 1;#res := 0; 134#fiboFINAL assume true; 135#fiboEXIT >#35#return; 130#L13-1 [2023-11-19 07:44:03,686 INFO L750 eck$LassoCheckResult]: Loop: 130#L13-1 call #t~ret5 := fibo(~n - 2);< 131#$Ultimate##0 ~n := #in~n; 141#L8 assume !(~n < 1); 142#L10 assume !(1 == ~n); 129#L13 call #t~ret4 := fibo(~n - 1);< 131#$Ultimate##0 ~n := #in~n; 141#L8 assume ~n < 1;#res := 0; 133#fiboFINAL assume true; 140#fiboEXIT >#35#return; 130#L13-1 [2023-11-19 07:44:03,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:03,689 INFO L85 PathProgramCache]: Analyzing trace with hash 523436175, now seen corresponding path program 1 times [2023-11-19 07:44:03,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:03,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765407082] [2023-11-19 07:44:03,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:03,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:03,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-19 07:44:03,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:03,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:44:03,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:03,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765407082] [2023-11-19 07:44:03,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765407082] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:03,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:03,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:44:03,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443658240] [2023-11-19 07:44:03,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:03,904 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-19 07:44:03,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:03,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1950983701, now seen corresponding path program 1 times [2023-11-19 07:44:03,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:03,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442280337] [2023-11-19 07:44:03,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:03,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:03,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:03,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:44:03,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:03,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:44:03,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:03,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442280337] [2023-11-19 07:44:03,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442280337] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:03,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:03,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:44:03,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806029551] [2023-11-19 07:44:03,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:03,980 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-11-19 07:44:03,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:03,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:44:03,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:44:03,985 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. cyclomatic complexity: 8 Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 07:44:04,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:04,100 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2023-11-19 07:44:04,100 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2023-11-19 07:44:04,107 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-19 07:44:04,115 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2023-11-19 07:44:04,116 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2023-11-19 07:44:04,117 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2023-11-19 07:44:04,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2023-11-19 07:44:04,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:44:04,118 INFO L218 hiAutomatonCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-11-19 07:44:04,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2023-11-19 07:44:04,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-19 07:44:04,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-19 07:44:04,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2023-11-19 07:44:04,122 INFO L240 hiAutomatonCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-11-19 07:44:04,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:44:04,123 INFO L428 stractBuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-11-19 07:44:04,124 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2023-11-19 07:44:04,124 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2023-11-19 07:44:04,125 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-19 07:44:04,125 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:44:04,125 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:44:04,126 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:04,126 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:04,126 INFO L748 eck$LassoCheckResult]: Stem: 209#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(11, 2);call #Ultimate.allocInit(12, 3); 210#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 7; 197#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 196#$Ultimate##0 ~n := #in~n; 198#L8 assume !(~n < 1); 212#L10 assume !(1 == ~n); 200#L13 call #t~ret4 := fibo(~n - 1);< 199#$Ultimate##0 ~n := #in~n; 201#L8 assume !(~n < 1); 211#L10 assume 1 == ~n;#res := 1; 213#fiboFINAL assume true; 216#fiboEXIT >#35#return; 203#L13-1 [2023-11-19 07:44:04,126 INFO L750 eck$LassoCheckResult]: Loop: 203#L13-1 call #t~ret5 := fibo(~n - 2);< 206#$Ultimate##0 ~n := #in~n; 219#L8 assume !(~n < 1); 217#L10 assume !(1 == ~n); 204#L13 call #t~ret4 := fibo(~n - 1);< 206#$Ultimate##0 ~n := #in~n; 219#L8 assume !(~n < 1); 217#L10 assume 1 == ~n;#res := 1; 218#fiboFINAL assume true; 214#fiboEXIT >#35#return; 203#L13-1 [2023-11-19 07:44:04,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:04,127 INFO L85 PathProgramCache]: Analyzing trace with hash -953322862, now seen corresponding path program 1 times [2023-11-19 07:44:04,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:04,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029351571] [2023-11-19 07:44:04,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:04,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:04,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:04,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-19 07:44:04,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:04,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:44:04,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:04,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029351571] [2023-11-19 07:44:04,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029351571] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:04,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544777216] [2023-11-19 07:44:04,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:04,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:04,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:04,290 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:04,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:44:04,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:04,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:44:04,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:04,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:44:04,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:04,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:44:04,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544777216] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:04,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:44:04,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-11-19 07:44:04,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346998511] [2023-11-19 07:44:04,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:04,541 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-19 07:44:04,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:04,542 INFO L85 PathProgramCache]: Analyzing trace with hash 350977484, now seen corresponding path program 1 times [2023-11-19 07:44:04,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:04,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128872170] [2023-11-19 07:44:04,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:04,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:44:04,549 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:44:04,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:44:04,555 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:44:04,678 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:44:04,679 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:44:04,679 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:44:04,679 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:44:04,679 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 07:44:04,679 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:44:04,679 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:44:04,680 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:44:04,680 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration3_Loop [2023-11-19 07:44:04,680 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:44:04,680 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:44:04,681 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:44:04,684 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:44:04,687 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:44:04,693 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:44:04,696 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:44:04,735 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:44:04,735 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 07:44:04,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:44:04,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:04,737 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:44:04,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2023-11-19 07:44:04,739 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:44:04,740 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:44:04,762 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:44:04,762 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#in~n=2} Honda state: {fibo_#in~n=2} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:44:04,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:04,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:44:04,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:04,787 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:44:04,802 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:44:04,802 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:44:04,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2023-11-19 07:44:04,832 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:44:04,833 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:44:04,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:04,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:44:04,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:04,858 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:44:04,862 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:44:04,862 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:44:04,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2023-11-19 07:44:04,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:04,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:44:04,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:04,894 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:44:04,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2023-11-19 07:44:04,896 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 07:44:04,896 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:44:04,918 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-19 07:44:04,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:04,942 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:44:04,942 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:44:04,943 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:44:04,943 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:44:04,943 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-19 07:44:04,943 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:44:04,943 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:44:04,943 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:44:04,943 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration3_Loop [2023-11-19 07:44:04,943 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:44:04,943 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:44:04,944 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:44:04,948 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:44:04,951 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:44:04,954 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:44:04,959 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:44:04,997 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:44:04,997 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-19 07:44:04,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:44:04,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:04,998 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:44:05,004 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:44:05,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2023-11-19 07:44:05,017 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:44:05,018 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:44:05,018 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:44:05,018 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:44:05,018 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:44:05,019 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:44:05,019 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:44:05,036 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:44:05,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:05,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:44:05,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:05,058 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:44:05,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2023-11-19 07:44:05,061 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 [2023-11-19 07:44:05,071 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:44:05,071 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:44:05,071 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:44:05,071 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:44:05,071 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:44:05,072 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:44:05,072 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:44:05,081 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:44:05,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:05,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:44:05,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:05,114 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:44:05,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2023-11-19 07:44:05,121 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 [2023-11-19 07:44:05,134 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:44:05,135 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:44:05,135 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:44:05,135 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:44:05,135 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:44:05,136 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:44:05,136 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:44:05,145 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:44:05,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:05,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:44:05,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:05,169 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:44:05,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2023-11-19 07:44:05,181 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 [2023-11-19 07:44:05,193 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:44:05,194 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:44:05,194 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:44:05,194 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:44:05,194 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:44:05,195 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:44:05,196 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:44:05,205 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-19 07:44:05,208 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2023-11-19 07:44:05,208 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-11-19 07:44:05,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:44:05,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:05,210 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:44:05,217 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-19 07:44:05,217 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-19 07:44:05,217 INFO L513 LassoAnalysis]: Proved termination. [2023-11-19 07:44:05,217 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2023-11-19 07:44:05,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2023-11-19 07:44:05,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:05,243 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-19 07:44:05,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:05,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:05,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:44:05,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:05,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:05,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:44:05,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:05,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:05,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:44:05,553 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2023-11-19 07:44:05,553 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:44:05,785 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Result 135 states and 183 transitions. Complement of second has 36 states. [2023-11-19 07:44:05,786 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 [2023-11-19 07:44:05,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:44:05,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2023-11-19 07:44:05,788 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 10 letters. [2023-11-19 07:44:05,789 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:44:05,789 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 22 letters. Loop has 10 letters. [2023-11-19 07:44:05,789 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:44:05,790 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 20 letters. [2023-11-19 07:44:05,790 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:44:05,791 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2023-11-19 07:44:05,797 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2023-11-19 07:44:05,803 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 108 states and 152 transitions. [2023-11-19 07:44:05,803 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2023-11-19 07:44:05,804 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2023-11-19 07:44:05,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 152 transitions. [2023-11-19 07:44:05,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:44:05,804 INFO L218 hiAutomatonCegarLoop]: Abstraction has 108 states and 152 transitions. [2023-11-19 07:44:05,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 152 transitions. [2023-11-19 07:44:05,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2023-11-19 07:44:05,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 64 states have internal predecessors, (71), 21 states have call successors, (22), 11 states have call predecessors, (22), 15 states have return successors, (33), 18 states have call predecessors, (33), 19 states have call successors, (33) [2023-11-19 07:44:05,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2023-11-19 07:44:05,820 INFO L240 hiAutomatonCegarLoop]: Abstraction has 94 states and 126 transitions. [2023-11-19 07:44:05,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:05,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:44:05,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:44:05,821 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:44:05,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:05,959 INFO L93 Difference]: Finished difference Result 123 states and 165 transitions. [2023-11-19 07:44:05,959 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 123 states and 165 transitions. [2023-11-19 07:44:05,964 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2023-11-19 07:44:05,969 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 123 states to 118 states and 160 transitions. [2023-11-19 07:44:05,969 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2023-11-19 07:44:05,969 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2023-11-19 07:44:05,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 118 states and 160 transitions. [2023-11-19 07:44:05,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:44:05,970 INFO L218 hiAutomatonCegarLoop]: Abstraction has 118 states and 160 transitions. [2023-11-19 07:44:05,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states and 160 transitions. [2023-11-19 07:44:05,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 106. [2023-11-19 07:44:05,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 66 states have (on average 1.196969696969697) internal successors, (79), 72 states have internal predecessors, (79), 24 states have call successors, (25), 13 states have call predecessors, (25), 16 states have return successors, (37), 20 states have call predecessors, (37), 22 states have call successors, (37) [2023-11-19 07:44:05,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 141 transitions. [2023-11-19 07:44:05,985 INFO L240 hiAutomatonCegarLoop]: Abstraction has 106 states and 141 transitions. [2023-11-19 07:44:05,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:44:05,986 INFO L428 stractBuchiCegarLoop]: Abstraction has 106 states and 141 transitions. [2023-11-19 07:44:05,986 INFO L335 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2023-11-19 07:44:05,986 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 106 states and 141 transitions. [2023-11-19 07:44:05,989 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2023-11-19 07:44:05,989 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:44:05,989 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:44:05,991 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:05,991 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2023-11-19 07:44:05,992 INFO L748 eck$LassoCheckResult]: Stem: 820#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(11, 2);call #Ultimate.allocInit(12, 3); 821#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 7; 805#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 806#$Ultimate##0 ~n := #in~n; 824#L8 assume !(~n < 1); 825#L10 assume !(1 == ~n); 793#L13 call #t~ret4 := fibo(~n - 1);< 792#$Ultimate##0 ~n := #in~n; 794#L8 assume !(~n < 1); 831#L10 assume !(1 == ~n); 803#L13 call #t~ret4 := fibo(~n - 1);< 804#$Ultimate##0 ~n := #in~n; 853#L8 assume !(~n < 1); 851#L10 assume !(1 == ~n); 846#L13 call #t~ret4 := fibo(~n - 1);< 804#$Ultimate##0 ~n := #in~n; 853#L8 assume !(~n < 1); 851#L10 assume !(1 == ~n); 846#L13 call #t~ret4 := fibo(~n - 1);< 804#$Ultimate##0 ~n := #in~n; 854#L8 assume !(~n < 1); 852#L10 assume 1 == ~n;#res := 1; 850#fiboFINAL assume true; 849#fiboEXIT >#35#return; 796#L13-1 call #t~ret5 := fibo(~n - 2);< 848#$Ultimate##0 ~n := #in~n; 822#L8 assume ~n < 1;#res := 0; 823#fiboFINAL assume true; 890#fiboEXIT >#37#return; 889#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 887#fiboFINAL assume true; 879#fiboEXIT >#35#return; 829#L13-1 [2023-11-19 07:44:05,992 INFO L750 eck$LassoCheckResult]: Loop: 829#L13-1 call #t~ret5 := fibo(~n - 2);< 802#$Ultimate##0 ~n := #in~n; 884#L8 assume !(~n < 1); 826#L10 assume !(1 == ~n); 827#L13 call #t~ret4 := fibo(~n - 1);< 802#$Ultimate##0 ~n := #in~n; 884#L8 assume !(~n < 1); 826#L10 assume !(1 == ~n); 827#L13 call #t~ret4 := fibo(~n - 1);< 802#$Ultimate##0 ~n := #in~n; 884#L8 assume !(~n < 1); 826#L10 assume 1 == ~n;#res := 1; 830#fiboFINAL assume true; 876#fiboEXIT >#35#return; 829#L13-1 call #t~ret5 := fibo(~n - 2);< 802#$Ultimate##0 ~n := #in~n; 884#L8 assume !(~n < 1); 826#L10 assume !(1 == ~n); 827#L13 call #t~ret4 := fibo(~n - 1);< 802#$Ultimate##0 ~n := #in~n; 884#L8 assume !(~n < 1); 826#L10 assume 1 == ~n;#res := 1; 830#fiboFINAL assume true; 876#fiboEXIT >#35#return; 829#L13-1 call #t~ret5 := fibo(~n - 2);< 802#$Ultimate##0 ~n := #in~n; 884#L8 assume ~n < 1;#res := 0; 885#fiboFINAL assume true; 883#fiboEXIT >#37#return; 878#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 886#fiboFINAL assume true; 880#fiboEXIT >#37#return; 878#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 886#fiboFINAL assume true; 880#fiboEXIT >#35#return; 829#L13-1 [2023-11-19 07:44:05,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:05,993 INFO L85 PathProgramCache]: Analyzing trace with hash 870102534, now seen corresponding path program 1 times [2023-11-19 07:44:05,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:05,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815358695] [2023-11-19 07:44:05,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:05,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:06,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:06,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-19 07:44:06,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:06,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:44:06,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:06,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-19 07:44:06,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:06,265 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 07:44:06,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:06,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815358695] [2023-11-19 07:44:06,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815358695] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:06,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662800999] [2023-11-19 07:44:06,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:06,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:06,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:06,269 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:06,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-19 07:44:06,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:06,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:44:06,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:06,405 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 07:44:06,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:06,672 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:44:06,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662800999] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:06,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:44:06,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 18 [2023-11-19 07:44:06,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857915701] [2023-11-19 07:44:06,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:06,674 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-19 07:44:06,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:06,675 INFO L85 PathProgramCache]: Analyzing trace with hash 2033249087, now seen corresponding path program 1 times [2023-11-19 07:44:06,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:06,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780151370] [2023-11-19 07:44:06,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:06,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:06,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:06,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:44:06,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:06,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:44:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:06,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-19 07:44:06,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:06,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:44:06,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:06,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-19 07:44:06,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:06,883 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-19 07:44:06,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:06,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780151370] [2023-11-19 07:44:06,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780151370] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:06,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022951910] [2023-11-19 07:44:06,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:06,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:06,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:06,885 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:06,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-19 07:44:06,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:06,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:44:06,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:06,993 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-19 07:44:06,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:07,179 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-19 07:44:07,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022951910] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:07,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:44:07,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-19 07:44:07,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377301598] [2023-11-19 07:44:07,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:07,181 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-11-19 07:44:07,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:07,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 07:44:07,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:44:07,183 INFO L87 Difference]: Start difference. First operand 106 states and 141 transitions. cyclomatic complexity: 40 Second operand has 19 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 11 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-19 07:44:07,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:07,513 INFO L93 Difference]: Finished difference Result 146 states and 193 transitions. [2023-11-19 07:44:07,513 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 146 states and 193 transitions. [2023-11-19 07:44:07,523 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2023-11-19 07:44:07,533 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 146 states to 139 states and 186 transitions. [2023-11-19 07:44:07,533 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 94 [2023-11-19 07:44:07,535 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 94 [2023-11-19 07:44:07,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 139 states and 186 transitions. [2023-11-19 07:44:07,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:44:07,536 INFO L218 hiAutomatonCegarLoop]: Abstraction has 139 states and 186 transitions. [2023-11-19 07:44:07,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states and 186 transitions. [2023-11-19 07:44:07,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2023-11-19 07:44:07,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 86 states have (on average 1.1744186046511629) internal successors, (101), 92 states have internal predecessors, (101), 33 states have call successors, (34), 17 states have call predecessors, (34), 20 states have return successors, (51), 29 states have call predecessors, (51), 30 states have call successors, (51) [2023-11-19 07:44:07,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 186 transitions. [2023-11-19 07:44:07,566 INFO L240 hiAutomatonCegarLoop]: Abstraction has 139 states and 186 transitions. [2023-11-19 07:44:07,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:44:07,569 INFO L428 stractBuchiCegarLoop]: Abstraction has 139 states and 186 transitions. [2023-11-19 07:44:07,569 INFO L335 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2023-11-19 07:44:07,570 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 139 states and 186 transitions. [2023-11-19 07:44:07,575 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2023-11-19 07:44:07,575 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:44:07,575 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:44:07,578 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [8, 7, 6, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:07,579 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2023-11-19 07:44:07,579 INFO L748 eck$LassoCheckResult]: Stem: 1589#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(11, 2);call #Ultimate.allocInit(12, 3); 1590#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 7; 1581#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 1582#$Ultimate##0 ~n := #in~n; 1587#L8 assume !(~n < 1); 1588#L10 assume !(1 == ~n); 1569#L13 call #t~ret4 := fibo(~n - 1);< 1568#$Ultimate##0 ~n := #in~n; 1570#L8 assume !(~n < 1); 1633#L10 assume !(1 == ~n); 1629#L13 call #t~ret4 := fibo(~n - 1);< 1632#$Ultimate##0 ~n := #in~n; 1631#L8 assume !(~n < 1); 1630#L10 assume !(1 == ~n); 1625#L13 call #t~ret4 := fibo(~n - 1);< 1628#$Ultimate##0 ~n := #in~n; 1627#L8 assume !(~n < 1); 1626#L10 assume !(1 == ~n); 1614#L13 call #t~ret4 := fibo(~n - 1);< 1619#$Ultimate##0 ~n := #in~n; 1623#L8 assume !(~n < 1); 1621#L10 assume !(1 == ~n); 1615#L13 call #t~ret4 := fibo(~n - 1);< 1619#$Ultimate##0 ~n := #in~n; 1623#L8 assume !(~n < 1); 1621#L10 assume !(1 == ~n); 1615#L13 call #t~ret4 := fibo(~n - 1);< 1619#$Ultimate##0 ~n := #in~n; 1624#L8 assume !(~n < 1); 1622#L10 assume 1 == ~n;#res := 1; 1620#fiboFINAL assume true; 1618#fiboEXIT >#35#return; 1594#L13-1 call #t~ret5 := fibo(~n - 2);< 1616#$Ultimate##0 ~n := #in~n; 1688#L8 assume ~n < 1;#res := 0; 1686#fiboFINAL assume true; 1685#fiboEXIT >#37#return; 1684#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1680#fiboFINAL assume true; 1672#fiboEXIT >#35#return; 1635#L13-1 [2023-11-19 07:44:07,579 INFO L750 eck$LassoCheckResult]: Loop: 1635#L13-1 call #t~ret5 := fibo(~n - 2);< 1580#$Ultimate##0 ~n := #in~n; 1640#L8 assume !(~n < 1); 1694#L10 assume !(1 == ~n); 1639#L13 call #t~ret4 := fibo(~n - 1);< 1580#$Ultimate##0 ~n := #in~n; 1640#L8 assume !(~n < 1); 1694#L10 assume !(1 == ~n); 1639#L13 call #t~ret4 := fibo(~n - 1);< 1580#$Ultimate##0 ~n := #in~n; 1640#L8 assume !(~n < 1); 1694#L10 assume 1 == ~n;#res := 1; 1693#fiboFINAL assume true; 1662#fiboEXIT >#35#return; 1664#L13-1 call #t~ret5 := fibo(~n - 2);< 1676#$Ultimate##0 ~n := #in~n; 1699#L8 assume ~n < 1;#res := 0; 1692#fiboFINAL assume true; 1681#fiboEXIT >#37#return; 1667#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1679#fiboFINAL assume true; 1670#fiboEXIT >#35#return; 1635#L13-1 [2023-11-19 07:44:07,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:07,580 INFO L85 PathProgramCache]: Analyzing trace with hash 2090813104, now seen corresponding path program 2 times [2023-11-19 07:44:07,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:07,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150196319] [2023-11-19 07:44:07,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:07,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:07,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:44:07,596 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:44:07,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:44:07,624 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:44:07,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:07,628 INFO L85 PathProgramCache]: Analyzing trace with hash -2000232554, now seen corresponding path program 2 times [2023-11-19 07:44:07,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:07,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169160717] [2023-11-19 07:44:07,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:07,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:07,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:44:07,637 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:44:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:44:07,643 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:44:07,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:07,643 INFO L85 PathProgramCache]: Analyzing trace with hash 2079680773, now seen corresponding path program 3 times [2023-11-19 07:44:07,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:07,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957113188] [2023-11-19 07:44:07,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:07,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:07,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:07,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-19 07:44:07,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:07,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:44:07,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:07,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-19 07:44:07,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:07,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-19 07:44:07,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:07,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:44:07,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:07,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-19 07:44:07,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:07,935 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 70 proven. 100 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-19 07:44:07,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:07,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957113188] [2023-11-19 07:44:07,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957113188] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:07,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957557902] [2023-11-19 07:44:07,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:44:07,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:07,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:07,938 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:07,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-19 07:44:07,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-11-19 07:44:08,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:44:08,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:44:08,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:08,162 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 87 proven. 47 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-19 07:44:08,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:08,568 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 87 proven. 49 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2023-11-19 07:44:08,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957557902] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:08,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:44:08,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 12] total 27 [2023-11-19 07:44:08,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133191321] [2023-11-19 07:44:08,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:08,857 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:44:08,858 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:44:08,858 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:44:08,858 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:44:08,858 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 07:44:08,858 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:44:08,858 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:44:08,858 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:44:08,859 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration5_Loop [2023-11-19 07:44:08,859 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:44:08,859 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:44:08,861 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:44:08,863 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:44:08,873 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:44:08,876 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:44:08,940 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:44:08,941 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 07:44:08,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:44:08,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:08,944 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:44:08,950 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:44:08,950 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:44:08,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2023-11-19 07:44:08,977 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:44:08,977 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret5=0} Honda state: {fibo_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:44:09,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:09,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:44:09,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:09,006 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:44:09,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2023-11-19 07:44:09,023 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:44:09,023 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:44:09,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Ended with exit code 0 [2023-11-19 07:44:09,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:44:09,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:09,080 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:44:09,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2023-11-19 07:44:09,082 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 07:44:09,082 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:44:09,540 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-19 07:44:09,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:09,544 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:44:09,544 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:44:09,544 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:44:09,544 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:44:09,544 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-19 07:44:09,544 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:44:09,545 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:44:09,545 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:44:09,545 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration5_Loop [2023-11-19 07:44:09,545 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:44:09,545 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:44:09,546 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:44:09,567 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:44:09,570 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:44:09,573 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:44:09,639 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:44:09,639 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-19 07:44:09,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:44:09,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:09,640 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:44:09,643 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 [2023-11-19 07:44:09,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2023-11-19 07:44:09,656 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:44:09,656 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:44:09,656 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:44:09,657 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:44:09,657 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:44:09,660 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:44:09,660 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:44:09,684 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-19 07:44:09,688 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-19 07:44:09,688 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-19 07:44:09,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:44:09,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:09,694 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:44:09,696 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-19 07:44:09,696 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-19 07:44:09,696 INFO L513 LassoAnalysis]: Proved termination. [2023-11-19 07:44:09,696 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2023-11-19 07:44:09,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2023-11-19 07:44:09,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:09,715 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-19 07:44:09,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:09,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:09,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 07:44:09,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:10,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:10,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 07:44:10,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:44:10,180 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2023-11-19 07:44:10,181 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 139 states and 186 transitions. cyclomatic complexity: 53 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 07:44:10,439 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 139 states and 186 transitions. cyclomatic complexity: 53. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 272 states and 374 transitions. Complement of second has 45 states. [2023-11-19 07:44:10,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2023-11-19 07:44:10,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 07:44:10,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 41 transitions. [2023-11-19 07:44:10,443 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 40 letters. Loop has 22 letters. [2023-11-19 07:44:10,443 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:44:10,444 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-19 07:44:10,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:10,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:10,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 07:44:10,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:10,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:10,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:10,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 07:44:10,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:10,928 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:44:10,929 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 7 loop predicates [2023-11-19 07:44:10,929 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 139 states and 186 transitions. cyclomatic complexity: 53 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 07:44:11,111 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 139 states and 186 transitions. cyclomatic complexity: 53. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 333 states and 447 transitions. Complement of second has 25 states. [2023-11-19 07:44:11,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2023-11-19 07:44:11,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 07:44:11,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2023-11-19 07:44:11,115 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 40 letters. Loop has 22 letters. [2023-11-19 07:44:11,116 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:44:11,116 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-19 07:44:11,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:11,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:11,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 07:44:11,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:11,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 07:44:11,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:11,627 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:44:11,628 INFO L141 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2023-11-19 07:44:11,628 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 139 states and 186 transitions. cyclomatic complexity: 53 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 07:44:11,959 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 139 states and 186 transitions. cyclomatic complexity: 53. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 1179 states and 1649 transitions. Complement of second has 138 states. [2023-11-19 07:44:11,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2023-11-19 07:44:11,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 07:44:11,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 46 transitions. [2023-11-19 07:44:11,961 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 40 letters. Loop has 22 letters. [2023-11-19 07:44:11,964 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:44:11,964 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 62 letters. Loop has 22 letters. [2023-11-19 07:44:11,966 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:44:11,966 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 40 letters. Loop has 44 letters. [2023-11-19 07:44:11,970 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:44:11,970 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1179 states and 1649 transitions. [2023-11-19 07:44:11,996 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 58 [2023-11-19 07:44:12,019 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1179 states to 679 states and 1031 transitions. [2023-11-19 07:44:12,019 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 271 [2023-11-19 07:44:12,021 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 302 [2023-11-19 07:44:12,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 679 states and 1031 transitions. [2023-11-19 07:44:12,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:44:12,022 INFO L218 hiAutomatonCegarLoop]: Abstraction has 679 states and 1031 transitions. [2023-11-19 07:44:12,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states and 1031 transitions. [2023-11-19 07:44:12,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 521. [2023-11-19 07:44:12,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 317 states have (on average 1.1892744479495267) internal successors, (377), 340 states have internal predecessors, (377), 121 states have call successors, (135), 62 states have call predecessors, (135), 83 states have return successors, (236), 118 states have call predecessors, (236), 115 states have call successors, (236) [2023-11-19 07:44:12,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 748 transitions. [2023-11-19 07:44:12,074 INFO L240 hiAutomatonCegarLoop]: Abstraction has 521 states and 748 transitions. [2023-11-19 07:44:12,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:12,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-19 07:44:12,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2023-11-19 07:44:12,076 INFO L87 Difference]: Start difference. First operand 521 states and 748 transitions. Second operand has 27 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 15 states have call successors, (21), 8 states have call predecessors, (21), 6 states have return successors, (15), 9 states have call predecessors, (15), 10 states have call successors, (15) [2023-11-19 07:44:12,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:12,723 INFO L93 Difference]: Finished difference Result 319 states and 372 transitions. [2023-11-19 07:44:12,723 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 319 states and 372 transitions. [2023-11-19 07:44:12,727 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-11-19 07:44:12,728 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 319 states to 0 states and 0 transitions. [2023-11-19 07:44:12,728 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2023-11-19 07:44:12,728 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2023-11-19 07:44:12,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2023-11-19 07:44:12,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:44:12,728 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-19 07:44:12,728 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-19 07:44:12,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-19 07:44:12,729 INFO L428 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-19 07:44:12,729 INFO L335 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2023-11-19 07:44:12,730 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2023-11-19 07:44:12,730 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-11-19 07:44:12,730 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2023-11-19 07:44:12,737 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.11 07:44:12 BoogieIcfgContainer [2023-11-19 07:44:12,738 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2023-11-19 07:44:12,738 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-19 07:44:12,738 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-19 07:44:12,739 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-19 07:44:12,739 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:44:01" (3/4) ... [2023-11-19 07:44:12,741 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-19 07:44:12,742 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-19 07:44:12,743 INFO L158 Benchmark]: Toolchain (without parser) took 11806.19ms. Allocated memory was 113.2MB in the beginning and 176.2MB in the end (delta: 62.9MB). Free memory was 68.5MB in the beginning and 65.7MB in the end (delta: 2.8MB). Peak memory consumption was 67.5MB. Max. memory is 16.1GB. [2023-11-19 07:44:12,743 INFO L158 Benchmark]: CDTParser took 0.74ms. Allocated memory is still 113.2MB. Free memory is still 82.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:44:12,743 INFO L158 Benchmark]: CACSL2BoogieTranslator took 330.28ms. Allocated memory is still 113.2MB. Free memory was 68.5MB in the beginning and 58.4MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-19 07:44:12,744 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.17ms. Allocated memory is still 113.2MB. Free memory was 58.4MB in the beginning and 57.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 07:44:12,744 INFO L158 Benchmark]: Boogie Preprocessor took 36.73ms. Allocated memory is still 113.2MB. Free memory was 57.0MB in the beginning and 56.0MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:44:12,744 INFO L158 Benchmark]: RCFGBuilder took 314.53ms. Allocated memory is still 113.2MB. Free memory was 56.0MB in the beginning and 47.2MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-19 07:44:12,745 INFO L158 Benchmark]: BuchiAutomizer took 11066.88ms. Allocated memory was 113.2MB in the beginning and 176.2MB in the end (delta: 62.9MB). Free memory was 46.9MB in the beginning and 66.7MB in the end (delta: -19.9MB). Peak memory consumption was 44.4MB. Max. memory is 16.1GB. [2023-11-19 07:44:12,745 INFO L158 Benchmark]: Witness Printer took 4.03ms. Allocated memory is still 176.2MB. Free memory was 66.7MB in the beginning and 65.7MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:44:12,747 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.74ms. Allocated memory is still 113.2MB. Free memory is still 82.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 330.28ms. Allocated memory is still 113.2MB. Free memory was 68.5MB in the beginning and 58.4MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.17ms. Allocated memory is still 113.2MB. Free memory was 58.4MB in the beginning and 57.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.73ms. Allocated memory is still 113.2MB. Free memory was 57.0MB in the beginning and 56.0MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 314.53ms. Allocated memory is still 113.2MB. Free memory was 56.0MB in the beginning and 47.2MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 11066.88ms. Allocated memory was 113.2MB in the beginning and 176.2MB in the end (delta: 62.9MB). Free memory was 46.9MB in the beginning and 66.7MB in the end (delta: -19.9MB). Peak memory consumption was 44.4MB. Max. memory is 16.1GB. * Witness Printer took 4.03ms. Allocated memory is still 176.2MB. Free memory was 66.7MB in the beginning and 65.7MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 7 terminating modules (4 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 9 locations. One nondeterministic module has affine ranking function n and consists of 10 locations. 4 modules have a trivial ranking function, the largest among these consists of 27 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 10.9s and 6 iterations. TraceHistogramMax:8. Analysis of lassos took 6.1s. Construction of modules took 0.9s. Büchi inclusion checks took 3.5s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 6. Automata minimization 0.2s AutomataMinimizationTime, 6 MinimizatonAttempts, 189 StatesRemovedByMinimization, 4 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 8/26 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 448 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 432 mSDsluCounter, 437 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 299 mSDsCounter, 306 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1084 IncrementalHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 306 mSolverCounterUnsat, 138 mSDtfsCounter, 1084 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT1 SILN0 SILU0 SILI2 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf100 lsp81 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq180 hnf92 smp80 dnf100 smp100 tf111 neg100 sie106 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 47ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 6 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.0s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2023-11-19 07:44:12,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:12,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-19 07:44:13,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-19 07:44:13,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:13,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f375736e-399e-4363-a82a-51410ac9545f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE