./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive/Fibonacci04.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_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/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_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive/Fibonacci04.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/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_39dac0a6-d01f-4a0b-b566-50138be3449b/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 8d19306ce3d42a6a85ce0e73aaa2bade9eaab24620b40f9180d62be222dc7b30 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:41:22,526 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:41:22,677 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Termination-32bit-Automizer_Default.epf [2023-11-19 07:41:22,683 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:41:22,685 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:41:22,727 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:41:22,729 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:41:22,730 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:41:22,731 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:41:22,738 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:41:22,738 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:41:22,739 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2023-11-19 07:41:22,739 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2023-11-19 07:41:22,741 INFO L153 SettingsManager]: * Use old map elimination=false [2023-11-19 07:41:22,742 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2023-11-19 07:41:22,743 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2023-11-19 07:41:22,743 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2023-11-19 07:41:22,744 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:41:22,745 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2023-11-19 07:41:22,745 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:41:22,746 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:41:22,747 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:41:22,747 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:41:22,747 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2023-11-19 07:41:22,748 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2023-11-19 07:41:22,748 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2023-11-19 07:41:22,749 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:41:22,749 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:41:22,750 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:41:22,750 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2023-11-19 07:41:22,752 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:41:22,752 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:41:22,752 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:41:22,753 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:41:22,753 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:41:22,754 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2023-11-19 07:41:22,754 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_39dac0a6-d01f-4a0b-b566-50138be3449b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d19306ce3d42a6a85ce0e73aaa2bade9eaab24620b40f9180d62be222dc7b30 [2023-11-19 07:41:23,157 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:41:23,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:41:23,196 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:41:23,198 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:41:23,200 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:41:23,202 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/recursive/Fibonacci04.c [2023-11-19 07:41:26,738 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:41:27,010 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:41:27,011 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/sv-benchmarks/c/recursive/Fibonacci04.c [2023-11-19 07:41:27,021 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/data/a4d5dea6b/0811e9dc967a40389e0fc30c4cd83113/FLAGfeee5c66e [2023-11-19 07:41:27,041 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/data/a4d5dea6b/0811e9dc967a40389e0fc30c4cd83113 [2023-11-19 07:41:27,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:41:27,052 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:41:27,056 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:41:27,057 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:41:27,064 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:41:27,065 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:41:27" (1/1) ... [2023-11-19 07:41:27,066 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@156cce4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:27, skipping insertion in model container [2023-11-19 07:41:27,067 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:41:27" (1/1) ... [2023-11-19 07:41:27,096 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:41:27,360 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:41:27,378 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:41:27,391 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:41:27,408 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:41:27,409 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:27 WrapperNode [2023-11-19 07:41:27,409 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:41:27,410 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:41:27,410 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:41:27,410 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:41:27,421 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:27" (1/1) ... [2023-11-19 07:41:27,429 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:27" (1/1) ... [2023-11-19 07:41:27,450 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 22 [2023-11-19 07:41:27,450 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:41:27,451 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:41:27,451 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:41:27,451 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:41:27,460 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:27" (1/1) ... [2023-11-19 07:41:27,460 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:27" (1/1) ... [2023-11-19 07:41:27,461 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:27" (1/1) ... [2023-11-19 07:41:27,462 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:27" (1/1) ... [2023-11-19 07:41:27,465 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:27" (1/1) ... [2023-11-19 07:41:27,467 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:27" (1/1) ... [2023-11-19 07:41:27,468 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:27" (1/1) ... [2023-11-19 07:41:27,469 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:27" (1/1) ... [2023-11-19 07:41:27,471 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:41:27,472 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:41:27,473 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:41:27,473 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:41:27,474 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:27" (1/1) ... [2023-11-19 07:41:27,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:27,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:27,519 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:27,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2023-11-19 07:41:27,559 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2023-11-19 07:41:27,559 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2023-11-19 07:41:27,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:41:27,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:41:27,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:41:27,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:41:27,640 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:41:27,642 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:41:27,767 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:41:27,782 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:41:27,782 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 07:41:27,787 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:41:27 BoogieIcfgContainer [2023-11-19 07:41:27,787 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:41:27,789 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2023-11-19 07:41:27,789 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2023-11-19 07:41:27,795 INFO L274 PluginConnector]: BuchiAutomizer initialized [2023-11-19 07:41:27,796 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-19 07:41:27,796 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.11 07:41:27" (1/3) ... [2023-11-19 07:41:27,798 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@78fe3b3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.11 07:41:27, skipping insertion in model container [2023-11-19 07:41:27,798 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-19 07:41:27,799 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:27" (2/3) ... [2023-11-19 07:41:27,801 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@78fe3b3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.11 07:41:27, skipping insertion in model container [2023-11-19 07:41:27,803 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-19 07:41:27,804 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:41:27" (3/3) ... [2023-11-19 07:41:27,805 INFO L332 chiAutomizerObserver]: Analyzing ICFG Fibonacci04.c [2023-11-19 07:41:27,895 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2023-11-19 07:41:27,895 INFO L304 stractBuchiCegarLoop]: Hoare is false [2023-11-19 07:41:27,895 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2023-11-19 07:41:27,895 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2023-11-19 07:41:27,895 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2023-11-19 07:41:27,896 INFO L308 stractBuchiCegarLoop]: Difference is false [2023-11-19 07:41:27,896 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2023-11-19 07:41:27,896 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2023-11-19 07:41:27,900 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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 07:41:27,924 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-19 07:41:27,925 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:41:27,925 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:41:27,931 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-11-19 07:41:27,931 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2023-11-19 07:41:27,931 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2023-11-19 07:41:27,932 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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 07:41:27,935 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-19 07:41:27,935 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:41:27,935 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:41:27,936 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-11-19 07:41:27,936 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2023-11-19 07:41:27,944 INFO L748 eck$LassoCheckResult]: Stem: 14#$Ultimate##0true assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 7#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet6#1, main_#t~ret7#1, main_~x~0#1, main_~result~0#1;havoc main_#t~nondet6#1;main_~x~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1; 6#L31true call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 10#$Ultimate##0true [2023-11-19 07:41:27,945 INFO L750 eck$LassoCheckResult]: Loop: 10#$Ultimate##0true ~n := #in~n; 16#L19true assume !(~n < 1); 5#L21true assume !(1 == ~n); 13#L24true call #t~ret4 := fibonacci(~n - 1);< 10#$Ultimate##0true [2023-11-19 07:41:27,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:27,952 INFO L85 PathProgramCache]: Analyzing trace with hash 42783, now seen corresponding path program 1 times [2023-11-19 07:41:27,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:27,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302603263] [2023-11-19 07:41:27,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:27,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:28,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:41:28,086 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:41:28,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:41:28,130 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:41:28,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:28,133 INFO L85 PathProgramCache]: Analyzing trace with hash 927643, now seen corresponding path program 1 times [2023-11-19 07:41:28,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:28,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353110474] [2023-11-19 07:41:28,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:28,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:28,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:41:28,158 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:41:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:41:28,171 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:41:28,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:28,176 INFO L85 PathProgramCache]: Analyzing trace with hash 856297401, now seen corresponding path program 1 times [2023-11-19 07:41:28,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:28,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308311226] [2023-11-19 07:41:28,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:28,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:28,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:41:28,207 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:41:28,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:41:28,216 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:41:28,384 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:41:28,385 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:41:28,385 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:41:28,385 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:41:28,386 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 07:41:28,386 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:28,386 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:41:28,386 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:41:28,386 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci04.c_Iteration1_Loop [2023-11-19 07:41:28,387 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:41:28,387 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:41:28,403 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 07:41:28,414 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 07:41:28,419 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 07:41:28,425 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 07:41:28,439 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 07:41:28,510 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:41:28,511 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 07:41:28,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:28,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:28,516 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:28,528 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:41:28,528 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:41:28,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2023-11-19 07:41:28,551 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:41:28,551 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:41:28,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Ended with exit code 0 [2023-11-19 07:41:28,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:28,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:28,566 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:28,569 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:41:28,569 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:41:28,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2023-11-19 07:41:28,591 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:41:28,591 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret5=0} Honda state: {fibonacci_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:41:28,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:28,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:28,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:28,626 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:28,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2023-11-19 07:41:28,632 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:41:28,632 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:41:28,655 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:41:28,655 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_~n=0} Honda state: {fibonacci_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:41:28,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:28,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:28,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:28,674 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:28,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2023-11-19 07:41:28,676 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:41:28,676 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:41:28,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Ended with exit code 0 [2023-11-19 07:41:28,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:28,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:28,706 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:28,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2023-11-19 07:41:28,710 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 07:41:28,710 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:41:28,803 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-19 07:41:28,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:28,808 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:41:28,808 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:41:28,808 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:41:28,808 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:41:28,808 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-19 07:41:28,809 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:28,809 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:41:28,809 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:41:28,809 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci04.c_Iteration1_Loop [2023-11-19 07:41:28,809 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:41:28,809 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:41:28,811 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 07:41:28,814 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 07:41:28,817 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 07:41:28,820 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 07:41:28,830 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 07:41:28,877 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:41:28,882 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-19 07:41:28,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:28,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:28,885 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:28,898 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 07:41:28,911 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:41:28,911 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:41:28,912 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:41:28,912 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:41:28,912 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:41:28,914 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:41:28,914 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:41:28,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2023-11-19 07:41:28,930 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:41:28,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:28,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:28,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:28,961 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:28,970 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 07:41:28,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2023-11-19 07:41:28,984 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:41:28,984 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:41:28,984 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:41:28,984 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:41:28,985 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:41:28,986 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:41:28,986 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:41:28,996 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:41:29,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:29,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:29,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:29,022 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:29,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2023-11-19 07:41:29,027 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 07:41:29,040 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:41:29,040 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:41:29,040 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:41:29,040 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:41:29,040 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:41:29,041 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:41:29,042 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:41:29,054 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:41:29,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:29,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:29,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:29,081 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:29,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2023-11-19 07:41:29,088 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 07:41:29,098 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:41:29,098 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:41:29,099 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:41:29,099 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:41:29,099 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:41:29,100 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:41:29,100 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:41:29,112 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-19 07:41:29,117 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-19 07:41:29,117 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-19 07:41:29,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:29,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:29,146 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:29,148 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-19 07:41:29,149 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-19 07:41:29,149 INFO L513 LassoAnalysis]: Proved termination. [2023-11-19 07:41:29,149 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2023-11-19 07:41:29,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2023-11-19 07:41:29,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:29,171 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-19 07:41:29,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:29,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:29,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:41:29,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:29,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:41:29,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:29,365 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 07:41:29,410 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 07:41:29,415 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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 07:41:29,557 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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 48 states and 60 transitions. Complement of second has 12 states. [2023-11-19 07:41:29,559 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 07:41:29,565 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 07:41:29,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2023-11-19 07:41:29,568 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2023-11-19 07:41:29,570 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:41:29,570 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2023-11-19 07:41:29,570 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:41:29,571 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2023-11-19 07:41:29,571 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:41:29,572 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 60 transitions. [2023-11-19 07:41:29,577 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-19 07:41:29,585 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 25 states and 34 transitions. [2023-11-19 07:41:29,586 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2023-11-19 07:41:29,587 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2023-11-19 07:41:29,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2023-11-19 07:41:29,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:41:29,588 INFO L218 hiAutomatonCegarLoop]: Abstraction has 25 states and 34 transitions. [2023-11-19 07:41:29,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2023-11-19 07:41:29,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2023-11-19 07:41:29,623 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 07:41:29,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2023-11-19 07:41:29,625 INFO L240 hiAutomatonCegarLoop]: Abstraction has 20 states and 26 transitions. [2023-11-19 07:41:29,626 INFO L428 stractBuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2023-11-19 07:41:29,626 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2023-11-19 07:41:29,626 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2023-11-19 07:41:29,627 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-19 07:41:29,627 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:41:29,628 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:41:29,629 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:29,629 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:29,630 INFO L748 eck$LassoCheckResult]: Stem: 130#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 131#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet6#1, main_#t~ret7#1, main_~x~0#1, main_~result~0#1;havoc main_#t~nondet6#1;main_~x~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1; 123#L31 call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 135#$Ultimate##0 ~n := #in~n; 137#L19 assume !(~n < 1); 134#L21 assume !(1 == ~n); 122#L24 call #t~ret4 := fibonacci(~n - 1);< 128#$Ultimate##0 ~n := #in~n; 136#L19 assume ~n < 1;#res := 0; 133#fibonacciFINAL assume true; 129#fibonacciEXIT >#31#return; 125#L24-1 [2023-11-19 07:41:29,630 INFO L750 eck$LassoCheckResult]: Loop: 125#L24-1 call #t~ret5 := fibonacci(~n - 2);< 127#$Ultimate##0 ~n := #in~n; 140#L19 assume !(~n < 1); 139#L21 assume !(1 == ~n); 124#L24 call #t~ret4 := fibonacci(~n - 1);< 127#$Ultimate##0 ~n := #in~n; 140#L19 assume ~n < 1;#res := 0; 126#fibonacciFINAL assume true; 138#fibonacciEXIT >#31#return; 125#L24-1 [2023-11-19 07:41:29,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:29,631 INFO L85 PathProgramCache]: Analyzing trace with hash 2073663503, now seen corresponding path program 1 times [2023-11-19 07:41:29,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:29,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764464051] [2023-11-19 07:41:29,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:29,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:29,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:29,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-19 07:41:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:29,807 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 07:41:29,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:29,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764464051] [2023-11-19 07:41:29,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764464051] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:29,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:29,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:41:29,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95657141] [2023-11-19 07:41:29,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:29,812 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-19 07:41:29,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:29,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1606275375, now seen corresponding path program 1 times [2023-11-19 07:41:29,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:29,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988153169] [2023-11-19 07:41:29,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:29,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:29,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:29,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:41:29,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:29,927 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 07:41:29,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:29,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988153169] [2023-11-19 07:41:29,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988153169] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:29,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:29,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:41:29,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887243999] [2023-11-19 07:41:29,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:29,929 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-11-19 07:41:29,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:29,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:41:29,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:41:29,935 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 07:41:30,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:30,023 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2023-11-19 07:41:30,023 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2023-11-19 07:41:30,026 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-19 07:41:30,028 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2023-11-19 07:41:30,028 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2023-11-19 07:41:30,028 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2023-11-19 07:41:30,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2023-11-19 07:41:30,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:41:30,029 INFO L218 hiAutomatonCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-11-19 07:41:30,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2023-11-19 07:41:30,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-19 07:41:30,033 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 07:41:30,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2023-11-19 07:41:30,035 INFO L240 hiAutomatonCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-11-19 07:41:30,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:41:30,037 INFO L428 stractBuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-11-19 07:41:30,037 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2023-11-19 07:41:30,037 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2023-11-19 07:41:30,038 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-19 07:41:30,038 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:41:30,039 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:41:30,040 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:30,040 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2023-11-19 07:41:30,041 INFO L748 eck$LassoCheckResult]: Stem: 203#$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(14, 2);call #Ultimate.allocInit(12, 3); 204#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet6#1, main_#t~ret7#1, main_~x~0#1, main_~result~0#1;havoc main_#t~nondet6#1;main_~x~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1; 195#L31 call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 208#$Ultimate##0 ~n := #in~n; 210#L19 assume !(~n < 1); 207#L21 assume !(1 == ~n); 196#L24 call #t~ret4 := fibonacci(~n - 1);< 201#$Ultimate##0 ~n := #in~n; 209#L19 assume !(~n < 1); 205#L21 assume 1 == ~n;#res := 1; 206#fibonacciFINAL assume true; 202#fibonacciEXIT >#31#return; 198#L24-1 [2023-11-19 07:41:30,041 INFO L750 eck$LassoCheckResult]: Loop: 198#L24-1 call #t~ret5 := fibonacci(~n - 2);< 200#$Ultimate##0 ~n := #in~n; 215#L19 assume !(~n < 1); 213#L21 assume !(1 == ~n); 197#L24 call #t~ret4 := fibonacci(~n - 1);< 200#$Ultimate##0 ~n := #in~n; 215#L19 assume !(~n < 1); 213#L21 assume !(1 == ~n); 197#L24 call #t~ret4 := fibonacci(~n - 1);< 200#$Ultimate##0 ~n := #in~n; 215#L19 assume !(~n < 1); 213#L21 assume 1 == ~n;#res := 1; 214#fibonacciFINAL assume true; 217#fibonacciEXIT >#31#return; 198#L24-1 call #t~ret5 := fibonacci(~n - 2);< 200#$Ultimate##0 ~n := #in~n; 215#L19 assume ~n < 1;#res := 0; 216#fibonacciFINAL assume true; 212#fibonacciEXIT >#33#return; 194#L24-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 199#fibonacciFINAL assume true; 211#fibonacciEXIT >#31#return; 198#L24-1 [2023-11-19 07:41:30,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:30,042 INFO L85 PathProgramCache]: Analyzing trace with hash -140916419, now seen corresponding path program 1 times [2023-11-19 07:41:30,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:30,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73908423] [2023-11-19 07:41:30,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:30,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:30,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:41:30,054 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:41:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:41:30,067 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:41:30,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:30,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1749360471, now seen corresponding path program 1 times [2023-11-19 07:41:30,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:30,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370990506] [2023-11-19 07:41:30,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:30,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:30,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:41:30,083 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:41:30,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:30,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:41:30,142 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:41:30,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:30,143 INFO L85 PathProgramCache]: Analyzing trace with hash 998757605, now seen corresponding path program 1 times [2023-11-19 07:41:30,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:30,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467770235] [2023-11-19 07:41:30,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:30,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:30,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:30,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-19 07:41:30,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:30,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-19 07:41:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:30,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:41:30,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:30,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-19 07:41:30,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-19 07:41:30,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:30,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467770235] [2023-11-19 07:41:30,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467770235] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:30,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820539303] [2023-11-19 07:41:30,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:30,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:30,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:30,373 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:30,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:41:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:30,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:41:30,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:30,499 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-19 07:41:30,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:30,676 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-19 07:41:30,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820539303] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:30,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:30,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2023-11-19 07:41:30,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431525111] [2023-11-19 07:41:30,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:31,122 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:41:31,122 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:41:31,123 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:41:31,123 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:41:31,123 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 07:41:31,123 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:31,123 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:41:31,123 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:41:31,123 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci04.c_Iteration3_Loop [2023-11-19 07:41:31,123 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:41:31,124 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:41:31,126 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 07:41:31,143 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 07:41:31,146 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 07:41:31,155 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 07:41:31,242 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:41:31,243 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 07:41:31,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:31,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:31,244 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:31,248 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:41:31,248 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:41:31,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2023-11-19 07:41:31,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:31,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:31,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:31,307 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:31,318 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 07:41:31,319 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:41:31,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2023-11-19 07:41:31,741 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-19 07:41:31,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:31,751 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:41:31,751 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:41:31,751 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:41:31,751 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:41:31,752 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-19 07:41:31,752 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:31,752 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:41:31,752 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:41:31,752 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci04.c_Iteration3_Loop [2023-11-19 07:41:31,752 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:41:31,752 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:41:31,753 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 07:41:31,759 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 07:41:31,761 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 07:41:31,764 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 07:41:31,835 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:41:31,835 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-19 07:41:31,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:31,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:31,836 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:31,846 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 07:41:31,858 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:41:31,858 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:41:31,858 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:41:31,859 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:41:31,859 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:41:31,859 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:41:31,860 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:41:31,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2023-11-19 07:41:31,872 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:41:31,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:31,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:31,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:31,899 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:31,907 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 07:41:31,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2023-11-19 07:41:31,921 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:41:31,921 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:41:31,921 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:41:31,921 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:41:31,921 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:41:31,922 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:41:31,922 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:41:31,936 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:41:31,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:31,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:31,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:31,961 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:31,968 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 07:41:31,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2023-11-19 07:41:31,980 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:41:31,980 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:41:31,981 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:41:31,981 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:41:31,981 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:41:31,982 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:41:31,982 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:41:31,992 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:41:32,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:32,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:32,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:32,014 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:32,017 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 07:41:32,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2023-11-19 07:41:32,030 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:41:32,030 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:41:32,030 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:41:32,030 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:41:32,030 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:41:32,032 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:41:32,032 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:41:32,042 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-19 07:41:32,049 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-19 07:41:32,049 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-19 07:41:32,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:32,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:32,057 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:32,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2023-11-19 07:41:32,069 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-19 07:41:32,069 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-19 07:41:32,069 INFO L513 LassoAnalysis]: Proved termination. [2023-11-19 07:41:32,069 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2023-11-19 07:41:32,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:32,092 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-19 07:41:32,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:32,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:32,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:41:32,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:32,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:32,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 07:41:32,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:32,484 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 07:41:32,485 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 07:41:32,486 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 07:41:32,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:32,870 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Result 159 states and 215 transitions. Complement of second has 48 states. [2023-11-19 07:41:32,871 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 07:41:32,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 07:41:32,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 41 transitions. [2023-11-19 07:41:32,875 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 12 letters. Loop has 22 letters. [2023-11-19 07:41:32,877 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:41:32,877 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 34 letters. Loop has 22 letters. [2023-11-19 07:41:32,880 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:41:32,880 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 12 letters. Loop has 44 letters. [2023-11-19 07:41:32,886 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:41:32,887 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 159 states and 215 transitions. [2023-11-19 07:41:32,896 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2023-11-19 07:41:32,903 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 159 states to 128 states and 180 transitions. [2023-11-19 07:41:32,904 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 74 [2023-11-19 07:41:32,905 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 79 [2023-11-19 07:41:32,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 128 states and 180 transitions. [2023-11-19 07:41:32,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:41:32,906 INFO L218 hiAutomatonCegarLoop]: Abstraction has 128 states and 180 transitions. [2023-11-19 07:41:32,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states and 180 transitions. [2023-11-19 07:41:32,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 106. [2023-11-19 07:41:32,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 70 states have internal predecessors, (81), 25 states have call successors, (26), 13 states have call predecessors, (26), 15 states have return successors, (33), 22 states have call predecessors, (33), 23 states have call successors, (33) [2023-11-19 07:41:32,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 140 transitions. [2023-11-19 07:41:32,933 INFO L240 hiAutomatonCegarLoop]: Abstraction has 106 states and 140 transitions. [2023-11-19 07:41:32,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:32,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:41:32,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:41:32,934 INFO L87 Difference]: Start difference. First operand 106 states and 140 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 07:41:33,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:33,032 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2023-11-19 07:41:33,032 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 44 states and 57 transitions. [2023-11-19 07:41:33,042 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-19 07:41:33,046 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 44 states to 41 states and 53 transitions. [2023-11-19 07:41:33,046 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 34 [2023-11-19 07:41:33,048 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 34 [2023-11-19 07:41:33,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 53 transitions. [2023-11-19 07:41:33,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:41:33,049 INFO L218 hiAutomatonCegarLoop]: Abstraction has 41 states and 53 transitions. [2023-11-19 07:41:33,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states and 53 transitions. [2023-11-19 07:41:33,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2023-11-19 07:41:33,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.12) internal successors, (28), 27 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-19 07:41:33,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2023-11-19 07:41:33,062 INFO L240 hiAutomatonCegarLoop]: Abstraction has 38 states and 47 transitions. [2023-11-19 07:41:33,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:41:33,063 INFO L428 stractBuchiCegarLoop]: Abstraction has 38 states and 47 transitions. [2023-11-19 07:41:33,064 INFO L335 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2023-11-19 07:41:33,064 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 38 states and 47 transitions. [2023-11-19 07:41:33,065 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-19 07:41:33,065 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:41:33,066 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:41:33,068 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:33,068 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2023-11-19 07:41:33,069 INFO L748 eck$LassoCheckResult]: Stem: 963#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 964#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet6#1, main_#t~ret7#1, main_~x~0#1, main_~result~0#1;havoc main_#t~nondet6#1;main_~x~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1; 953#L31 call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 968#$Ultimate##0 ~n := #in~n; 971#L19 assume !(~n < 1); 967#L21 assume !(1 == ~n); 955#L24 call #t~ret4 := fibonacci(~n - 1);< 960#$Ultimate##0 ~n := #in~n; 973#L19 assume !(~n < 1); 988#L21 assume !(1 == ~n); 954#L24 call #t~ret4 := fibonacci(~n - 1);< 960#$Ultimate##0 ~n := #in~n; 974#L19 assume !(~n < 1); 965#L21 assume 1 == ~n;#res := 1; 966#fibonacciFINAL assume true; 986#fibonacciEXIT >#31#return; 983#L24-1 call #t~ret5 := fibonacci(~n - 2);< 984#$Ultimate##0 ~n := #in~n; 987#L19 assume ~n < 1;#res := 0; 985#fibonacciFINAL assume true; 982#fibonacciEXIT >#33#return; 981#L24-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 980#fibonacciFINAL assume true; 979#fibonacciEXIT >#31#return; 957#L24-1 [2023-11-19 07:41:33,069 INFO L750 eck$LassoCheckResult]: Loop: 957#L24-1 call #t~ret5 := fibonacci(~n - 2);< 959#$Ultimate##0 ~n := #in~n; 978#L19 assume !(~n < 1); 976#L21 assume !(1 == ~n); 956#L24 call #t~ret4 := fibonacci(~n - 1);< 959#$Ultimate##0 ~n := #in~n; 978#L19 assume !(~n < 1); 976#L21 assume !(1 == ~n); 956#L24 call #t~ret4 := fibonacci(~n - 1);< 959#$Ultimate##0 ~n := #in~n; 978#L19 assume !(~n < 1); 976#L21 assume 1 == ~n;#res := 1; 977#fibonacciFINAL assume true; 989#fibonacciEXIT >#31#return; 962#L24-1 call #t~ret5 := fibonacci(~n - 2);< 972#$Ultimate##0 ~n := #in~n; 969#L19 assume ~n < 1;#res := 0; 970#fibonacciFINAL assume true; 961#fibonacciEXIT >#33#return; 952#L24-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 958#fibonacciFINAL assume true; 975#fibonacciEXIT >#31#return; 957#L24-1 [2023-11-19 07:41:33,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:33,070 INFO L85 PathProgramCache]: Analyzing trace with hash 62997961, now seen corresponding path program 2 times [2023-11-19 07:41:33,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:33,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546029766] [2023-11-19 07:41:33,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:33,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:33,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:41:33,082 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:41:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:41:33,095 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:41:33,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:33,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1749360471, now seen corresponding path program 2 times [2023-11-19 07:41:33,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:33,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947637446] [2023-11-19 07:41:33,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:33,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:33,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:41:33,106 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:41:33,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:41:33,115 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:41:33,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:33,116 INFO L85 PathProgramCache]: Analyzing trace with hash 969547889, now seen corresponding path program 3 times [2023-11-19 07:41:33,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:33,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784129141] [2023-11-19 07:41:33,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:33,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:33,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:33,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-19 07:41:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:33,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:41:33,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:33,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-19 07:41:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:33,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-19 07:41:33,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:33,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:41:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:33,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-19 07:41:33,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:33,331 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 16 proven. 46 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-19 07:41:33,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:33,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784129141] [2023-11-19 07:41:33,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784129141] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:33,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277360626] [2023-11-19 07:41:33,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:41:33,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:33,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:33,335 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:33,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-19 07:41:33,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-19 07:41:33,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:41:33,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:41:33,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 35 proven. 47 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-19 07:41:33,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:34,000 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-19 07:41:34,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277360626] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:34,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:34,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 12] total 21 [2023-11-19 07:41:34,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538670387] [2023-11-19 07:41:34,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:34,364 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:41:34,364 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:41:34,365 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:41:34,365 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:41:34,365 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 07:41:34,365 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:34,365 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:41:34,365 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:41:34,365 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci04.c_Iteration4_Loop [2023-11-19 07:41:34,365 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:41:34,365 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:41:34,366 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 07:41:34,383 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 07:41:34,386 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 07:41:34,389 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 07:41:34,469 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:41:34,469 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 07:41:34,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:34,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:34,473 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:34,488 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:41:34,488 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:41:34,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2023-11-19 07:41:34,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:34,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:34,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:34,548 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:34,550 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 07:41:34,551 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:41:34,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2023-11-19 07:41:34,877 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-19 07:41:34,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:34,881 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:41:34,881 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:41:34,881 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:41:34,881 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:41:34,882 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-19 07:41:34,882 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:34,882 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:41:34,882 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:41:34,882 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci04.c_Iteration4_Loop [2023-11-19 07:41:34,882 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:41:34,882 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:41:34,883 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 07:41:34,900 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 07:41:34,903 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 07:41:34,906 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:41:34,987 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:41:34,987 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-19 07:41:34,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:34,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:34,988 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:34,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2023-11-19 07:41:34,990 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 07:41:35,000 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:41:35,000 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:41:35,000 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:41:35,000 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:41:35,001 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:41:35,002 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:41:35,002 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:41:35,011 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-19 07:41:35,015 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-19 07:41:35,015 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-19 07:41:35,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:35,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:35,021 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:35,025 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-19 07:41:35,025 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-19 07:41:35,025 INFO L513 LassoAnalysis]: Proved termination. [2023-11-19 07:41:35,026 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2023-11-19 07:41:35,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2023-11-19 07:41:35,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:35,049 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-19 07:41:35,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:35,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:41:35,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:35,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:35,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 07:41:35,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:35,601 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 07:41:35,602 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 07:41:35,602 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 38 states and 47 transitions. cyclomatic complexity: 11 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, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 07:41:35,727 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 38 states and 47 transitions. cyclomatic complexity: 11. 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, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 45 states and 54 transitions. Complement of second has 11 states. [2023-11-19 07:41:35,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2023-11-19 07:41:35,731 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, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 07:41:35,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 17 transitions. [2023-11-19 07:41:35,732 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 24 letters. Loop has 22 letters. [2023-11-19 07:41:35,733 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:41:35,733 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-19 07:41:35,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:35,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:35,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:41:35,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:36,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:36,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 07:41:36,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:36,234 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 07:41:36,236 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 07:41:36,236 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 38 states and 47 transitions. cyclomatic complexity: 11 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, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 07:41:36,346 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 38 states and 47 transitions. cyclomatic complexity: 11. 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, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 45 states and 54 transitions. Complement of second has 11 states. [2023-11-19 07:41:36,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2023-11-19 07:41:36,349 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, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 07:41:36,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 17 transitions. [2023-11-19 07:41:36,349 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 24 letters. Loop has 22 letters. [2023-11-19 07:41:36,349 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:41:36,349 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-19 07:41:36,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:36,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:36,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:41:36,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:36,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:36,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 07:41:36,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:36,801 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 07:41:36,803 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 07:41:36,804 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 38 states and 47 transitions. cyclomatic complexity: 11 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, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 07:41:37,151 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 38 states and 47 transitions. cyclomatic complexity: 11. 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, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 344 states and 443 transitions. Complement of second has 125 states. [2023-11-19 07:41:37,154 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 07:41:37,158 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, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 07:41:37,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 46 transitions. [2023-11-19 07:41:37,159 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 24 letters. Loop has 22 letters. [2023-11-19 07:41:37,163 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:41:37,163 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 46 letters. Loop has 22 letters. [2023-11-19 07:41:37,164 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:41:37,164 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 24 letters. Loop has 44 letters. [2023-11-19 07:41:37,168 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:41:37,168 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 344 states and 443 transitions. [2023-11-19 07:41:37,200 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2023-11-19 07:41:37,209 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 344 states to 219 states and 296 transitions. [2023-11-19 07:41:37,210 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 98 [2023-11-19 07:41:37,211 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 115 [2023-11-19 07:41:37,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 219 states and 296 transitions. [2023-11-19 07:41:37,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:41:37,212 INFO L218 hiAutomatonCegarLoop]: Abstraction has 219 states and 296 transitions. [2023-11-19 07:41:37,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states and 296 transitions. [2023-11-19 07:41:37,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 171. [2023-11-19 07:41:37,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 106 states have (on average 1.1415094339622642) internal successors, (121), 111 states have internal predecessors, (121), 38 states have call successors, (42), 23 states have call predecessors, (42), 27 states have return successors, (59), 36 states have call predecessors, (59), 36 states have call successors, (59) [2023-11-19 07:41:37,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 222 transitions. [2023-11-19 07:41:37,237 INFO L240 hiAutomatonCegarLoop]: Abstraction has 171 states and 222 transitions. [2023-11-19 07:41:37,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:37,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 07:41:37,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-11-19 07:41:37,239 INFO L87 Difference]: Start difference. First operand 171 states and 222 transitions. Second operand has 21 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 18 states have internal predecessors, (49), 13 states have call successors, (17), 3 states have call predecessors, (17), 7 states have return successors, (16), 10 states have call predecessors, (16), 11 states have call successors, (16) [2023-11-19 07:41:37,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:37,587 INFO L93 Difference]: Finished difference Result 348 states and 502 transitions. [2023-11-19 07:41:37,588 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 348 states and 502 transitions. [2023-11-19 07:41:37,595 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2023-11-19 07:41:37,605 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 348 states to 338 states and 489 transitions. [2023-11-19 07:41:37,606 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 172 [2023-11-19 07:41:37,607 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 192 [2023-11-19 07:41:37,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 338 states and 489 transitions. [2023-11-19 07:41:37,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:41:37,607 INFO L218 hiAutomatonCegarLoop]: Abstraction has 338 states and 489 transitions. [2023-11-19 07:41:37,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states and 489 transitions. [2023-11-19 07:41:37,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 273. [2023-11-19 07:41:37,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 170 states have (on average 1.1294117647058823) internal successors, (192), 173 states have internal predecessors, (192), 60 states have call successors, (72), 36 states have call predecessors, (72), 43 states have return successors, (136), 63 states have call predecessors, (136), 58 states have call successors, (136) [2023-11-19 07:41:37,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 400 transitions. [2023-11-19 07:41:37,635 INFO L240 hiAutomatonCegarLoop]: Abstraction has 273 states and 400 transitions. [2023-11-19 07:41:37,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 07:41:37,636 INFO L428 stractBuchiCegarLoop]: Abstraction has 273 states and 400 transitions. [2023-11-19 07:41:37,636 INFO L335 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2023-11-19 07:41:37,637 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 273 states and 400 transitions. [2023-11-19 07:41:37,640 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2023-11-19 07:41:37,640 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:41:37,640 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:41:37,643 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [13, 11, 9, 8, 8, 5, 5, 4, 4, 3, 2, 1, 1, 1] [2023-11-19 07:41:37,643 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2023-11-19 07:41:37,643 INFO L748 eck$LassoCheckResult]: Stem: 2939#$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(14, 2);call #Ultimate.allocInit(12, 3); 2940#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet6#1, main_#t~ret7#1, main_~x~0#1, main_~result~0#1;havoc main_#t~nondet6#1;main_~x~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1; 2947#L31 call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 2948#$Ultimate##0 ~n := #in~n; 2994#L19 assume !(~n < 1); 2992#L21 assume !(1 == ~n); 2985#L24 call #t~ret4 := fibonacci(~n - 1);< 2987#$Ultimate##0 ~n := #in~n; 2993#L19 assume !(~n < 1); 2991#L21 assume !(1 == ~n); 2984#L24 call #t~ret4 := fibonacci(~n - 1);< 2987#$Ultimate##0 ~n := #in~n; 2993#L19 assume !(~n < 1); 2991#L21 assume !(1 == ~n); 2984#L24 call #t~ret4 := fibonacci(~n - 1);< 2987#$Ultimate##0 ~n := #in~n; 2993#L19 assume !(~n < 1); 2991#L21 assume !(1 == ~n); 2984#L24 call #t~ret4 := fibonacci(~n - 1);< 2987#$Ultimate##0 ~n := #in~n; 2993#L19 assume !(~n < 1); 2991#L21 assume !(1 == ~n); 2984#L24 call #t~ret4 := fibonacci(~n - 1);< 2987#$Ultimate##0 ~n := #in~n; 2995#L19 assume !(~n < 1); 3058#L21 assume 1 == ~n;#res := 1; 3054#fibonacciFINAL assume true; 3040#fibonacciEXIT >#31#return; 3036#L24-1 call #t~ret5 := fibonacci(~n - 2);< 3037#$Ultimate##0 ~n := #in~n; 3053#L19 assume ~n < 1;#res := 0; 3039#fibonacciFINAL assume true; 3035#fibonacciEXIT >#33#return; 3032#L24-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 3031#fibonacciFINAL assume true; 3030#fibonacciEXIT >#31#return; 3024#L24-1 call #t~ret5 := fibonacci(~n - 2);< 3027#$Ultimate##0 ~n := #in~n; 3096#L19 assume !(~n < 1); 3084#L21 assume 1 == ~n;#res := 1; 3081#fibonacciFINAL assume true; 3023#fibonacciEXIT >#33#return; 3017#L24-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 3015#fibonacciFINAL assume true; 3000#fibonacciEXIT >#31#return; 2997#L24-1 call #t~ret5 := fibonacci(~n - 2);< 3001#$Ultimate##0 ~n := #in~n; 3088#L19 assume !(~n < 1); 3086#L21 assume !(1 == ~n); 3087#L24 call #t~ret4 := fibonacci(~n - 1);< 3191#$Ultimate##0 ~n := #in~n; 3146#L19 assume !(~n < 1); 3147#L21 assume 1 == ~n;#res := 1; 3192#fibonacciFINAL assume true; 3189#fibonacciEXIT >#31#return; 3019#L24-1 call #t~ret5 := fibonacci(~n - 2);< 3022#$Ultimate##0 ~n := #in~n; 3095#L19 assume ~n < 1;#res := 0; 3080#fibonacciFINAL assume true; 3018#fibonacciEXIT >#33#return; 3021#L24-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 3013#fibonacciFINAL assume true; 2996#fibonacciEXIT >#33#return; 2986#L24-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 2989#fibonacciFINAL assume true; 2983#fibonacciEXIT >#31#return; 2979#L24-1 call #t~ret5 := fibonacci(~n - 2);< 2978#$Ultimate##0 ~n := #in~n; 3089#L19 assume !(~n < 1); 3085#L21 assume !(1 == ~n); 2951#L24 call #t~ret4 := fibonacci(~n - 1);< 3190#$Ultimate##0 ~n := #in~n; 2949#L19 assume !(~n < 1); 2952#L21 assume !(1 == ~n); 3157#L24 call #t~ret4 := fibonacci(~n - 1);< 3159#$Ultimate##0 [2023-11-19 07:41:37,644 INFO L750 eck$LassoCheckResult]: Loop: 3159#$Ultimate##0 ~n := #in~n; 3169#L19 assume !(~n < 1); 3166#L21 assume !(1 == ~n); 3158#L24 call #t~ret4 := fibonacci(~n - 1);< 3159#$Ultimate##0 [2023-11-19 07:41:37,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:37,644 INFO L85 PathProgramCache]: Analyzing trace with hash -427722619, now seen corresponding path program 4 times [2023-11-19 07:41:37,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:37,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150384688] [2023-11-19 07:41:37,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:37,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:37,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:41:37,663 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:41:37,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:41:37,684 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:41:37,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:37,685 INFO L85 PathProgramCache]: Analyzing trace with hash 927643, now seen corresponding path program 2 times [2023-11-19 07:41:37,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:37,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142084271] [2023-11-19 07:41:37,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:37,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:37,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:41:37,688 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:41:37,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:41:37,690 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:41:37,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:37,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1616363039, now seen corresponding path program 5 times [2023-11-19 07:41:37,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:37,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383223610] [2023-11-19 07:41:37,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:37,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:37,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:37,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-19 07:41:37,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:37,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:41:37,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:38,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:41:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:38,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:41:38,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:38,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-19 07:41:38,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:38,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-19 07:41:38,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:38,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-19 07:41:38,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:38,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:41:38,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:38,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-19 07:41:38,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:38,102 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 133 proven. 115 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-11-19 07:41:38,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:38,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383223610] [2023-11-19 07:41:38,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383223610] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:38,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497619330] [2023-11-19 07:41:38,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:41:38,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:38,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:38,105 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:38,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-19 07:41:38,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-11-19 07:41:38,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:41:38,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 07:41:38,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:38,280 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 133 proven. 115 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-11-19 07:41:38,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 133 proven. 130 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2023-11-19 07:41:38,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497619330] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:38,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:38,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 15] total 20 [2023-11-19 07:41:38,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115290644] [2023-11-19 07:41:38,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:38,992 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:41:38,993 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:41:38,993 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:41:38,993 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:41:38,993 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 07:41:38,993 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:38,993 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:41:38,993 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:41:38,994 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci04.c_Iteration5_Loop [2023-11-19 07:41:38,994 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:41:38,994 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:41:38,995 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 07:41:38,998 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 07:41:39,000 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 07:41:39,007 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 07:41:39,010 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 07:41:39,049 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:41:39,049 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 07:41:39,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:39,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:39,053 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:39,059 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:41:39,059 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:41:39,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2023-11-19 07:41:39,085 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:41:39,085 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret4=0} Honda state: {fibonacci_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:41:39,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:39,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:39,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:39,110 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:39,113 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:41:39,113 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:41:39,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2023-11-19 07:41:39,145 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:41:39,145 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:41:39,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:39,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:39,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:39,168 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:39,173 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:41:39,173 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:41:39,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2023-11-19 07:41:39,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:39,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:39,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:39,225 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:39,228 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 07:41:39,228 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:41:39,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2023-11-19 07:41:39,287 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-19 07:41:39,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:39,295 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:41:39,296 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:41:39,296 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:41:39,296 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:41:39,296 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-19 07:41:39,296 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:39,296 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:41:39,296 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:41:39,296 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci04.c_Iteration5_Loop [2023-11-19 07:41:39,296 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:41:39,296 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:41:39,297 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 07:41:39,309 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 07:41:39,311 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 07:41:39,319 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:41:39,321 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:41:39,354 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:41:39,358 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-19 07:41:39,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:39,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:39,362 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:39,365 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 07:41:39,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2023-11-19 07:41:39,377 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:41:39,377 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:41:39,378 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:41:39,378 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:41:39,378 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:41:39,379 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:41:39,379 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:41:39,401 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:41:39,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:39,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:39,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:39,421 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:39,425 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 07:41:39,437 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:41:39,437 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:41:39,438 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:41:39,438 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:41:39,438 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:41:39,438 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:41:39,438 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:41:39,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2023-11-19 07:41:39,448 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:41:39,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:39,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:39,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:39,468 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:39,470 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 07:41:39,483 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:41:39,483 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:41:39,483 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:41:39,483 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:41:39,483 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:41:39,484 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:41:39,484 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:41:39,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2023-11-19 07:41:39,493 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-19 07:41:39,495 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2023-11-19 07:41:39,496 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-11-19 07:41:39,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:39,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:39,502 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:39,505 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-19 07:41:39,505 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-19 07:41:39,505 INFO L513 LassoAnalysis]: Proved termination. [2023-11-19 07:41:39,506 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2023-11-19 07:41:39,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2023-11-19 07:41:39,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:39,531 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-19 07:41:39,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:39,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:39,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-19 07:41:39,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:40,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:41:40,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:40,231 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 07:41:40,232 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2023-11-19 07:41:40,232 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 273 states and 400 transitions. cyclomatic complexity: 131 Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:41:40,303 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 273 states and 400 transitions. cyclomatic complexity: 131. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 295 states and 426 transitions. Complement of second has 13 states. [2023-11-19 07:41:40,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2023-11-19 07:41:40,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:41:40,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2023-11-19 07:41:40,305 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 75 letters. Loop has 4 letters. [2023-11-19 07:41:40,305 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:41:40,305 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-19 07:41:40,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:40,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:40,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-19 07:41:40,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:40,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:40,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:40,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:41:40,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:41,027 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 07:41:41,028 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2023-11-19 07:41:41,028 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 273 states and 400 transitions. cyclomatic complexity: 131 Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:41:41,099 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 273 states and 400 transitions. cyclomatic complexity: 131. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 295 states and 426 transitions. Complement of second has 13 states. [2023-11-19 07:41:41,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2023-11-19 07:41:41,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:41:41,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2023-11-19 07:41:41,101 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 75 letters. Loop has 4 letters. [2023-11-19 07:41:41,101 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:41:41,101 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-19 07:41:41,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:41,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:41,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-19 07:41:41,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:41,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:41:41,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:41,894 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 07:41:41,894 INFO L141 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2023-11-19 07:41:41,895 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 273 states and 400 transitions. cyclomatic complexity: 131 Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:41:41,977 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 273 states and 400 transitions. cyclomatic complexity: 131. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 348 states and 483 transitions. Complement of second has 14 states. [2023-11-19 07:41:41,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2023-11-19 07:41:41,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:41:41,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2023-11-19 07:41:41,979 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 75 letters. Loop has 4 letters. [2023-11-19 07:41:41,980 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:41:41,980 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 79 letters. Loop has 4 letters. [2023-11-19 07:41:41,980 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:41:41,980 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 75 letters. Loop has 8 letters. [2023-11-19 07:41:41,981 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:41:41,981 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 348 states and 483 transitions. [2023-11-19 07:41:41,989 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2023-11-19 07:41:41,998 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 348 states to 287 states and 416 transitions. [2023-11-19 07:41:41,998 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 137 [2023-11-19 07:41:42,000 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 142 [2023-11-19 07:41:42,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 287 states and 416 transitions. [2023-11-19 07:41:42,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:41:42,001 INFO L218 hiAutomatonCegarLoop]: Abstraction has 287 states and 416 transitions. [2023-11-19 07:41:42,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states and 416 transitions. [2023-11-19 07:41:42,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 279. [2023-11-19 07:41:42,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 175 states have (on average 1.1257142857142857) internal successors, (197), 178 states have internal predecessors, (197), 61 states have call successors, (73), 37 states have call predecessors, (73), 43 states have return successors, (138), 63 states have call predecessors, (138), 59 states have call successors, (138) [2023-11-19 07:41:42,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 408 transitions. [2023-11-19 07:41:42,034 INFO L240 hiAutomatonCegarLoop]: Abstraction has 279 states and 408 transitions. [2023-11-19 07:41:42,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:42,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:41:42,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:41:42,035 INFO L87 Difference]: Start difference. First operand 279 states and 408 transitions. Second operand has 20 states, 15 states have (on average 3.0) internal successors, (45), 16 states have internal predecessors, (45), 16 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2023-11-19 07:41:42,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:42,250 INFO L93 Difference]: Finished difference Result 495 states and 760 transitions. [2023-11-19 07:41:42,250 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 495 states and 760 transitions. [2023-11-19 07:41:42,260 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2023-11-19 07:41:42,270 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 495 states to 490 states and 753 transitions. [2023-11-19 07:41:42,270 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 255 [2023-11-19 07:41:42,271 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 262 [2023-11-19 07:41:42,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 490 states and 753 transitions. [2023-11-19 07:41:42,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:41:42,272 INFO L218 hiAutomatonCegarLoop]: Abstraction has 490 states and 753 transitions. [2023-11-19 07:41:42,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states and 753 transitions. [2023-11-19 07:41:42,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 370. [2023-11-19 07:41:42,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 231 states have (on average 1.147186147186147) internal successors, (265), 232 states have internal predecessors, (265), 83 states have call successors, (99), 49 states have call predecessors, (99), 56 states have return successors, (218), 88 states have call predecessors, (218), 81 states have call successors, (218) [2023-11-19 07:41:42,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 582 transitions. [2023-11-19 07:41:42,296 INFO L240 hiAutomatonCegarLoop]: Abstraction has 370 states and 582 transitions. [2023-11-19 07:41:42,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:41:42,298 INFO L428 stractBuchiCegarLoop]: Abstraction has 370 states and 582 transitions. [2023-11-19 07:41:42,298 INFO L335 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2023-11-19 07:41:42,298 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 370 states and 582 transitions. [2023-11-19 07:41:42,302 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2023-11-19 07:41:42,302 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:41:42,302 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:41:42,305 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [19, 16, 15, 11, 10, 8, 8, 7, 7, 5, 3, 1, 1, 1] [2023-11-19 07:41:42,305 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2023-11-19 07:41:42,306 INFO L748 eck$LassoCheckResult]: Stem: 6350#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 6351#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet6#1, main_#t~ret7#1, main_~x~0#1, main_~result~0#1;havoc main_#t~nondet6#1;main_~x~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1; 6358#L31 call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 6359#$Ultimate##0 ~n := #in~n; 6441#L19 assume !(~n < 1); 6439#L21 assume !(1 == ~n); 6403#L24 call #t~ret4 := fibonacci(~n - 1);< 6437#$Ultimate##0 ~n := #in~n; 6432#L19 assume !(~n < 1); 6427#L21 assume !(1 == ~n); 6404#L24 call #t~ret4 := fibonacci(~n - 1);< 6410#$Ultimate##0 ~n := #in~n; 6482#L19 assume !(~n < 1); 6480#L21 assume !(1 == ~n); 6405#L24 call #t~ret4 := fibonacci(~n - 1);< 6410#$Ultimate##0 ~n := #in~n; 6482#L19 assume !(~n < 1); 6480#L21 assume !(1 == ~n); 6405#L24 call #t~ret4 := fibonacci(~n - 1);< 6410#$Ultimate##0 ~n := #in~n; 6482#L19 assume !(~n < 1); 6480#L21 assume !(1 == ~n); 6405#L24 call #t~ret4 := fibonacci(~n - 1);< 6410#$Ultimate##0 ~n := #in~n; 6484#L19 assume !(~n < 1); 6563#L21 assume 1 == ~n;#res := 1; 6562#fibonacciFINAL assume true; 6559#fibonacciEXIT >#31#return; 6555#L24-1 call #t~ret5 := fibonacci(~n - 2);< 6556#$Ultimate##0 ~n := #in~n; 6561#L19 assume ~n < 1;#res := 0; 6558#fibonacciFINAL assume true; 6554#fibonacciEXIT >#33#return; 6548#L24-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 6518#fibonacciFINAL assume true; 6514#fibonacciEXIT >#31#return; 6445#L24-1 call #t~ret5 := fibonacci(~n - 2);< 6448#$Ultimate##0 ~n := #in~n; 6513#L19 assume !(~n < 1); 6495#L21 assume 1 == ~n;#res := 1; 6383#fibonacciFINAL assume true; 6444#fibonacciEXIT >#33#return; 6443#L24-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 6442#fibonacciFINAL assume true; 6425#fibonacciEXIT >#31#return; 6417#L24-1 call #t~ret5 := fibonacci(~n - 2);< 6420#$Ultimate##0 ~n := #in~n; 6497#L19 assume !(~n < 1); 6496#L21 assume !(1 == ~n); 6434#L24 call #t~ret4 := fibonacci(~n - 1);< 6617#$Ultimate##0 ~n := #in~n; 6615#L19 assume !(~n < 1); 6440#L21 assume 1 == ~n;#res := 1; 6438#fibonacciFINAL assume true; 6433#fibonacciEXIT >#31#return; 6376#L24-1 call #t~ret5 := fibonacci(~n - 2);< 6372#$Ultimate##0 ~n := #in~n; 6375#L19 assume ~n < 1;#res := 0; 6450#fibonacciFINAL assume true; 6428#fibonacciEXIT >#33#return; 6426#L24-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 6423#fibonacciFINAL assume true; 6416#fibonacciEXIT >#33#return; 6414#L24-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 6412#fibonacciFINAL assume true; 6408#fibonacciEXIT >#31#return; 6382#L24-1 call #t~ret5 := fibonacci(~n - 2);< 6389#$Ultimate##0 ~n := #in~n; 6390#L19 assume !(~n < 1); 6381#L21 assume !(1 == ~n); 6384#L24 call #t~ret4 := fibonacci(~n - 1);< 6571#$Ultimate##0 ~n := #in~n; 6576#L19 assume !(~n < 1); 6574#L21 assume !(1 == ~n); 6529#L24 call #t~ret4 := fibonacci(~n - 1);< 6533#$Ultimate##0 ~n := #in~n; 6536#L19 assume !(~n < 1); 6534#L21 assume 1 == ~n;#res := 1; 6532#fibonacciFINAL assume true; 6528#fibonacciEXIT >#31#return; 6522#L24-1 call #t~ret5 := fibonacci(~n - 2);< 6526#$Ultimate##0 ~n := #in~n; 6531#L19 assume ~n < 1;#res := 0; 6527#fibonacciFINAL assume true; 6519#fibonacciEXIT >#33#return; 6524#L24-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 6572#fibonacciFINAL assume true; 6569#fibonacciEXIT >#31#return; 6447#L24-1 call #t~ret5 := fibonacci(~n - 2);< 6449#$Ultimate##0 ~n := #in~n; 6506#L19 assume !(~n < 1); 6452#L21 assume 1 == ~n;#res := 1; 6451#fibonacciFINAL assume true; 6446#fibonacciEXIT >#33#return; 6443#L24-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 6442#fibonacciFINAL assume true; 6425#fibonacciEXIT >#33#return; 6409#L24-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 6498#fibonacciFINAL assume true; 6415#fibonacciEXIT >#31#return; 6391#L24-1 call #t~ret5 := fibonacci(~n - 2);< 6392#$Ultimate##0 ~n := #in~n; 6402#L19 assume !(~n < 1); 6399#L21 assume !(1 == ~n); 6343#L24 call #t~ret4 := fibonacci(~n - 1);< 6623#$Ultimate##0 ~n := #in~n; 6364#L19 assume !(~n < 1); 6365#L21 assume !(1 == ~n); 6341#L24 call #t~ret4 := fibonacci(~n - 1);< 6344#$Ultimate##0 ~n := #in~n; 6379#L19 assume !(~n < 1); 6649#L21 assume !(1 == ~n); 6353#L24 [2023-11-19 07:41:42,306 INFO L750 eck$LassoCheckResult]: Loop: 6353#L24 call #t~ret4 := fibonacci(~n - 1);< 6344#$Ultimate##0 ~n := #in~n; 6379#L19 assume !(~n < 1); 6649#L21 assume !(1 == ~n); 6353#L24 [2023-11-19 07:41:42,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:42,306 INFO L85 PathProgramCache]: Analyzing trace with hash -315610179, now seen corresponding path program 6 times [2023-11-19 07:41:42,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:42,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368166333] [2023-11-19 07:41:42,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:42,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:42,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:41:42,326 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:41:42,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:41:42,348 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:41:42,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:42,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1817383, now seen corresponding path program 3 times [2023-11-19 07:41:42,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:42,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542862178] [2023-11-19 07:41:42,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:42,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:42,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:41:42,352 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:41:42,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:41:42,354 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:41:42,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:42,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1033349347, now seen corresponding path program 7 times [2023-11-19 07:41:42,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:42,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381389909] [2023-11-19 07:41:42,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:42,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:42,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:42,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-19 07:41:42,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:42,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:41:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:42,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:41:42,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:42,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:41:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:42,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:41:42,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:42,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-19 07:41:42,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:42,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-19 07:41:42,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:42,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-19 07:41:42,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:42,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:41:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:42,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-19 07:41:42,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:42,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-19 07:41:42,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:42,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:41:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:42,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:41:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:43,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-19 07:41:43,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:43,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-19 07:41:43,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:43,008 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 231 proven. 268 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-11-19 07:41:43,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:43,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381389909] [2023-11-19 07:41:43,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381389909] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:43,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945566090] [2023-11-19 07:41:43,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 07:41:43,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:43,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:43,011 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:43,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-19 07:41:43,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:43,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 07:41:43,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:43,220 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 231 proven. 268 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-11-19 07:41:43,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:44,265 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 231 proven. 294 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-11-19 07:41:44,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945566090] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:44,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:44,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 17] total 23 [2023-11-19 07:41:44,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737549849] [2023-11-19 07:41:44,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:44,329 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:41:44,329 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:41:44,329 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:41:44,329 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:41:44,329 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 07:41:44,329 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:44,329 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:41:44,330 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:41:44,330 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci04.c_Iteration6_Loop [2023-11-19 07:41:44,330 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:41:44,330 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:41:44,331 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 07:41:44,333 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:41:44,335 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:41:44,337 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:41:44,393 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:41:44,394 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 07:41:44,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:44,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:44,397 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:44,402 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:41:44,402 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:41:44,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2023-11-19 07:41:44,425 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:41:44,425 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret4=0} Honda state: {fibonacci_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:41:44,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:44,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:44,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:44,449 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:44,457 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:41:44,457 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:41:44,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2023-11-19 07:41:44,478 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:41:44,478 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret5=0} Honda state: {fibonacci_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:41:44,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:44,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:44,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:44,493 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:44,496 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:41:44,496 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:41:44,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2023-11-19 07:41:44,508 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:41:44,508 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:41:44,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:44,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:44,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:44,523 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:44,525 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:41:44,525 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:41:44,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2023-11-19 07:41:44,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:44,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:44,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:44,558 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:44,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2023-11-19 07:41:44,559 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 07:41:44,559 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:41:46,327 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-19 07:41:46,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:46,330 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:41:46,331 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:41:46,331 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:41:46,331 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:41:46,331 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-19 07:41:46,331 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:46,331 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:41:46,331 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:41:46,331 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci04.c_Iteration6_Loop [2023-11-19 07:41:46,331 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:41:46,331 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:41:46,332 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:41:46,338 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:41:46,341 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:41:46,344 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 07:41:46,387 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:41:46,387 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-19 07:41:46,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:46,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:46,389 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:46,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2023-11-19 07:41:46,394 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 07:41:46,404 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:41:46,404 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:41:46,404 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:41:46,404 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:41:46,404 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:41:46,405 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:41:46,405 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:41:46,432 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:41:46,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:46,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:46,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:46,459 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:46,465 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:41:46,477 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:41:46,478 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:41:46,478 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:41:46,478 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:41:46,478 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:41:46,478 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:41:46,478 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:41:46,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2023-11-19 07:41:46,489 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:41:46,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:46,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:46,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:46,513 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:46,516 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 07:41:46,528 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:41:46,528 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:41:46,528 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:41:46,528 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:41:46,528 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:41:46,529 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:41:46,529 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:41:46,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2023-11-19 07:41:46,539 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:41:46,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:46,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:46,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:46,564 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:46,566 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 07:41:46,578 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:41:46,578 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:41:46,579 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:41:46,579 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:41:46,579 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:41:46,580 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:41:46,580 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:41:46,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2023-11-19 07:41:46,596 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-19 07:41:46,610 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-19 07:41:46,610 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-19 07:41:46,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:41:46,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:46,617 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:46,619 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-19 07:41:46,619 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-19 07:41:46,619 INFO L513 LassoAnalysis]: Proved termination. [2023-11-19 07:41:46,619 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2023-11-19 07:41:46,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Waiting until timeout for monitored process [2023-11-19 07:41:46,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:46,646 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-19 07:41:46,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:46,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:46,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-19 07:41:46,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:46,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:47,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:41:47,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:47,772 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 07:41:47,772 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2023-11-19 07:41:47,773 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 370 states and 582 transitions. cyclomatic complexity: 216 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:41:47,847 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 370 states and 582 transitions. cyclomatic complexity: 216. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 379 states and 592 transitions. Complement of second has 18 states. [2023-11-19 07:41:47,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2023-11-19 07:41:47,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:41:47,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2023-11-19 07:41:47,849 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 112 letters. Loop has 4 letters. [2023-11-19 07:41:47,849 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:41:47,849 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-19 07:41:47,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:47,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:48,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-19 07:41:48,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:48,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:48,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:41:48,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:48,939 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 07:41:48,939 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2023-11-19 07:41:48,940 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 370 states and 582 transitions. cyclomatic complexity: 216 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:41:49,029 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 370 states and 582 transitions. cyclomatic complexity: 216. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 385 states and 598 transitions. Complement of second has 17 states. [2023-11-19 07:41:49,029 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 07:41:49,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:41:49,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2023-11-19 07:41:49,031 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 112 letters. Loop has 4 letters. [2023-11-19 07:41:49,031 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:41:49,031 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-19 07:41:49,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:49,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:49,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-19 07:41:49,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:50,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:50,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:41:50,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:50,189 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 07:41:50,189 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 4 loop predicates [2023-11-19 07:41:50,190 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 370 states and 582 transitions. cyclomatic complexity: 216 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:41:50,274 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 370 states and 582 transitions. cyclomatic complexity: 216. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 450 states and 690 transitions. Complement of second has 27 states. [2023-11-19 07:41:50,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2023-11-19 07:41:50,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:41:50,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2023-11-19 07:41:50,276 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 112 letters. Loop has 4 letters. [2023-11-19 07:41:50,276 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:41:50,277 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 116 letters. Loop has 4 letters. [2023-11-19 07:41:50,277 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:41:50,277 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 112 letters. Loop has 8 letters. [2023-11-19 07:41:50,278 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:41:50,278 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 450 states and 690 transitions. [2023-11-19 07:41:50,287 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2023-11-19 07:41:50,294 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 450 states to 370 states and 582 transitions. [2023-11-19 07:41:50,295 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 160 [2023-11-19 07:41:50,295 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 182 [2023-11-19 07:41:50,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 370 states and 582 transitions. [2023-11-19 07:41:50,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:41:50,297 INFO L218 hiAutomatonCegarLoop]: Abstraction has 370 states and 582 transitions. [2023-11-19 07:41:50,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states and 582 transitions. [2023-11-19 07:41:50,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 370. [2023-11-19 07:41:50,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 231 states have (on average 1.147186147186147) internal successors, (265), 232 states have internal predecessors, (265), 83 states have call successors, (99), 49 states have call predecessors, (99), 56 states have return successors, (218), 88 states have call predecessors, (218), 81 states have call successors, (218) [2023-11-19 07:41:50,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 582 transitions. [2023-11-19 07:41:50,315 INFO L240 hiAutomatonCegarLoop]: Abstraction has 370 states and 582 transitions. [2023-11-19 07:41:50,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:50,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-19 07:41:50,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2023-11-19 07:41:50,317 INFO L87 Difference]: Start difference. First operand 370 states and 582 transitions. Second operand has 24 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 19 states have call successors, (21), 5 states have call predecessors, (21), 6 states have return successors, (23), 10 states have call predecessors, (23), 15 states have call successors, (23) [2023-11-19 07:41:50,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:50,578 INFO L93 Difference]: Finished difference Result 554 states and 872 transitions. [2023-11-19 07:41:50,579 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 554 states and 872 transitions. [2023-11-19 07:41:50,589 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-11-19 07:41:50,589 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 554 states to 0 states and 0 transitions. [2023-11-19 07:41:50,589 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2023-11-19 07:41:50,589 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2023-11-19 07:41:50,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2023-11-19 07:41:50,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:50,590 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-19 07:41:50,590 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-19 07:41:50,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:41:50,591 INFO L428 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-19 07:41:50,591 INFO L335 stractBuchiCegarLoop]: ======== Iteration 7 ============ [2023-11-19 07:41:50,591 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2023-11-19 07:41:50,591 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-11-19 07:41:50,591 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2023-11-19 07:41:50,599 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.11 07:41:50 BoogieIcfgContainer [2023-11-19 07:41:50,599 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2023-11-19 07:41:50,599 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-19 07:41:50,599 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-19 07:41:50,600 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-19 07:41:50,600 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:41:27" (3/4) ... [2023-11-19 07:41:50,606 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-19 07:41:50,607 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-19 07:41:50,608 INFO L158 Benchmark]: Toolchain (without parser) took 23555.94ms. Allocated memory was 174.1MB in the beginning and 308.3MB in the end (delta: 134.2MB). Free memory was 134.9MB in the beginning and 169.7MB in the end (delta: -34.7MB). Peak memory consumption was 100.1MB. Max. memory is 16.1GB. [2023-11-19 07:41:50,608 INFO L158 Benchmark]: CDTParser took 0.72ms. Allocated memory is still 111.1MB. Free memory is still 81.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:41:50,609 INFO L158 Benchmark]: CACSL2BoogieTranslator took 353.42ms. Allocated memory is still 174.1MB. Free memory was 134.9MB in the beginning and 143.6MB in the end (delta: -8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-19 07:41:50,609 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.16ms. Allocated memory is still 174.1MB. Free memory was 143.6MB in the beginning and 141.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 07:41:50,610 INFO L158 Benchmark]: Boogie Preprocessor took 20.32ms. Allocated memory is still 174.1MB. Free memory was 141.5MB in the beginning and 140.6MB in the end (delta: 828.8kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:41:50,610 INFO L158 Benchmark]: RCFGBuilder took 315.30ms. Allocated memory is still 174.1MB. Free memory was 140.6MB in the beginning and 131.0MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-19 07:41:50,610 INFO L158 Benchmark]: BuchiAutomizer took 22810.26ms. Allocated memory was 174.1MB in the beginning and 308.3MB in the end (delta: 134.2MB). Free memory was 131.0MB in the beginning and 169.7MB in the end (delta: -38.7MB). Peak memory consumption was 97.4MB. Max. memory is 16.1GB. [2023-11-19 07:41:50,611 INFO L158 Benchmark]: Witness Printer took 8.14ms. Allocated memory is still 308.3MB. Free memory is still 169.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:41:50,613 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.72ms. Allocated memory is still 111.1MB. Free memory is still 81.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 353.42ms. Allocated memory is still 174.1MB. Free memory was 134.9MB in the beginning and 143.6MB in the end (delta: -8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.16ms. Allocated memory is still 174.1MB. Free memory was 143.6MB in the beginning and 141.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.32ms. Allocated memory is still 174.1MB. Free memory was 141.5MB in the beginning and 140.6MB in the end (delta: 828.8kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 315.30ms. Allocated memory is still 174.1MB. Free memory was 140.6MB in the beginning and 131.0MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * BuchiAutomizer took 22810.26ms. Allocated memory was 174.1MB in the beginning and 308.3MB in the end (delta: 134.2MB). Free memory was 131.0MB in the beginning and 169.7MB in the end (delta: -38.7MB). Peak memory consumption was 97.4MB. Max. memory is 16.1GB. * Witness Printer took 8.14ms. Allocated memory is still 308.3MB. Free memory is still 169.7MB. 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 10 terminating modules (5 trivial, 2 deterministic, 3 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 10 locations. One nondeterministic module has affine ranking function n and consists of 10 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. 5 modules have a trivial ranking function, the largest among these consists of 24 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 22.7s and 7 iterations. TraceHistogramMax:19. Analysis of lassos took 11.8s. Construction of modules took 1.0s. Büchi inclusion checks took 9.5s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 9. Automata minimization 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 271 StatesRemovedByMinimization, 7 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, 3, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 16/46 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 547 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 500 mSDsluCounter, 454 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 267 mSDsCounter, 393 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 843 IncrementalHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 393 mSolverCounterUnsat, 187 mSDtfsCounter, 843 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT4 SILN0 SILU0 SILI1 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital19 mio100 ax100 hnf100 lsp95 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq175 hnf95 smp64 dnf100 smp100 tf110 neg100 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 46ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 8 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 3.2s 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 07:41:50,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:50,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:51,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-19 07:41:51,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:51,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39dac0a6-d01f-4a0b-b566-50138be3449b/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