./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-numeric/Fibonacci01-2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-numeric/Fibonacci01-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ --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 64bit --witnessprinter.graph.data.programhash 14cfbc3a2ba2bfe3a03d4d1ebff24b0baf1851f06dbbd2468b59e09322e4ce16 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:29:15,543 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:29:15,622 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Termination-64bit-Automizer_Default.epf [2023-11-23 22:29:15,628 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:29:15,629 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:29:15,672 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:29:15,672 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:29:15,673 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:29:15,674 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:29:15,679 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:29:15,681 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:29:15,681 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:29:15,682 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:29:15,684 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2023-11-23 22:29:15,684 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2023-11-23 22:29:15,685 INFO L153 SettingsManager]: * Use old map elimination=false [2023-11-23 22:29:15,685 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2023-11-23 22:29:15,686 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2023-11-23 22:29:15,686 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2023-11-23 22:29:15,687 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:29:15,687 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2023-11-23 22:29:15,687 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:29:15,688 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:29:15,688 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2023-11-23 22:29:15,689 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2023-11-23 22:29:15,689 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2023-11-23 22:29:15,689 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 22:29:15,690 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:29:15,690 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2023-11-23 22:29:15,691 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:29:15,692 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:29:15,692 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:29:15,692 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:29:15,693 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:29:15,693 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2023-11-23 22:29:15,693 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_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14cfbc3a2ba2bfe3a03d4d1ebff24b0baf1851f06dbbd2468b59e09322e4ce16 [2023-11-23 22:29:16,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:29:16,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:29:16,036 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:29:16,038 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:29:16,039 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:29:16,040 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/termination-numeric/Fibonacci01-2.c [2023-11-23 22:29:19,122 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:29:19,336 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:29:19,336 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/sv-benchmarks/c/termination-numeric/Fibonacci01-2.c [2023-11-23 22:29:19,344 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/data/8e0d9a639/a0e615b1386645ee91bd2f61c1f6a8f8/FLAG2cf7f9e41 [2023-11-23 22:29:19,360 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/data/8e0d9a639/a0e615b1386645ee91bd2f61c1f6a8f8 [2023-11-23 22:29:19,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:29:19,364 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:29:19,366 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:29:19,367 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:29:19,372 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:29:19,373 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:29:19" (1/1) ... [2023-11-23 22:29:19,374 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a2e6abe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:19, skipping insertion in model container [2023-11-23 22:29:19,375 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:29:19" (1/1) ... [2023-11-23 22:29:19,396 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:29:19,575 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:29:19,589 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:29:19,605 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:29:19,617 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:29:19,617 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:19 WrapperNode [2023-11-23 22:29:19,618 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:29:19,619 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:29:19,619 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:29:19,619 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:29:19,627 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:19" (1/1) ... [2023-11-23 22:29:19,634 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:19" (1/1) ... [2023-11-23 22:29:19,651 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 25 [2023-11-23 22:29:19,652 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:29:19,653 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:29:19,653 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:29:19,653 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:29:19,664 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:19" (1/1) ... [2023-11-23 22:29:19,664 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:19" (1/1) ... [2023-11-23 22:29:19,666 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:19" (1/1) ... [2023-11-23 22:29:19,675 INFO L189 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-23 22:29:19,675 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:19" (1/1) ... [2023-11-23 22:29:19,675 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:19" (1/1) ... [2023-11-23 22:29:19,678 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:19" (1/1) ... [2023-11-23 22:29:19,680 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:19" (1/1) ... [2023-11-23 22:29:19,681 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:19" (1/1) ... [2023-11-23 22:29:19,682 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:19" (1/1) ... [2023-11-23 22:29:19,683 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:29:19,684 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:29:19,684 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:29:19,684 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:29:19,685 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:19" (1/1) ... [2023-11-23 22:29:19,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:19,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:19,720 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:19,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2023-11-23 22:29:19,750 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2023-11-23 22:29:19,751 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2023-11-23 22:29:19,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:29:19,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:29:19,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:29:19,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:29:19,811 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:29:19,813 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:29:19,915 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:29:19,925 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:29:19,926 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 22:29:19,927 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:29:19 BoogieIcfgContainer [2023-11-23 22:29:19,928 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:29:19,929 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2023-11-23 22:29:19,929 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2023-11-23 22:29:19,934 INFO L274 PluginConnector]: BuchiAutomizer initialized [2023-11-23 22:29:19,934 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-23 22:29:19,935 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 23.11 10:29:19" (1/3) ... [2023-11-23 22:29:19,936 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@56472c2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 23.11 10:29:19, skipping insertion in model container [2023-11-23 22:29:19,936 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-23 22:29:19,936 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:19" (2/3) ... [2023-11-23 22:29:19,937 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@56472c2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 23.11 10:29:19, skipping insertion in model container [2023-11-23 22:29:19,937 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-23 22:29:19,937 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:29:19" (3/3) ... [2023-11-23 22:29:19,939 INFO L332 chiAutomizerObserver]: Analyzing ICFG Fibonacci01-2.c [2023-11-23 22:29:19,991 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2023-11-23 22:29:19,991 INFO L304 stractBuchiCegarLoop]: Hoare is false [2023-11-23 22:29:19,991 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2023-11-23 22:29:19,992 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2023-11-23 22:29:19,992 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2023-11-23 22:29:19,992 INFO L308 stractBuchiCegarLoop]: Difference is false [2023-11-23 22:29:19,992 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2023-11-23 22:29:19,992 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2023-11-23 22:29:19,996 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 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) [2023-11-23 22:29:20,018 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-23 22:29:20,018 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-23 22:29:20,019 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-23 22:29:20,024 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2023-11-23 22:29:20,024 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2023-11-23 22:29:20,025 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2023-11-23 22:29:20,025 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 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) [2023-11-23 22:29:20,027 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-23 22:29:20,028 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-23 22:29:20,028 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-23 22:29:20,028 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2023-11-23 22:29:20,029 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2023-11-23 22:29:20,036 INFO L748 eck$LassoCheckResult]: Stem: 16#$Ultimate##0true assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(16, 2);call #Ultimate.allocInit(12, 3); 10#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet6#1, main_#t~ret7#1, main_~x~0#1, main_~result~0#1;havoc main_#t~nondet6#1;main_~x~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1; 7#L29true assume !(main_~x~0#1 < 1); 9#L31true call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 13#$Ultimate##0true [2023-11-23 22:29:20,036 INFO L750 eck$LassoCheckResult]: Loop: 13#$Ultimate##0true ~n := #in~n; 4#L17true assume !(~n < 1); 18#L19true assume !(1 == ~n); 15#L22true call #t~ret4 := fibonacci(~n - 1);< 13#$Ultimate##0true [2023-11-23 22:29:20,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:20,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1325878, now seen corresponding path program 1 times [2023-11-23 22:29:20,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:20,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107448503] [2023-11-23 22:29:20,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:20,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:20,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:29:20,152 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 22:29:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:29:20,180 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-23 22:29:20,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:20,183 INFO L85 PathProgramCache]: Analyzing trace with hash 927648, now seen corresponding path program 1 times [2023-11-23 22:29:20,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:20,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393371430] [2023-11-23 22:29:20,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:20,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:20,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:29:20,192 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 22:29:20,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:29:20,198 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-23 22:29:20,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:20,203 INFO L85 PathProgramCache]: Analyzing trace with hash 410501205, now seen corresponding path program 1 times [2023-11-23 22:29:20,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:20,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900382879] [2023-11-23 22:29:20,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:20,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:20,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:29:20,228 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 22:29:20,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:29:20,257 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-23 22:29:20,454 INFO L210 LassoAnalysis]: Preferences: [2023-11-23 22:29:20,455 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-23 22:29:20,455 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-23 22:29:20,455 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-23 22:29:20,455 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-23 22:29:20,456 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:20,456 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-23 22:29:20,456 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-23 22:29:20,456 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci01-2.c_Iteration1_Loop [2023-11-23 22:29:20,456 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-23 22:29:20,456 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-23 22:29:20,475 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:20,487 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:20,494 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:20,500 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:20,523 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:20,602 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-23 22:29:20,604 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-23 22:29:20,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:20,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:20,609 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:20,616 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-23 22:29:20,617 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:29:20,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2023-11-23 22:29:20,652 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-23 22:29:20,652 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-23 22:29:20,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:20,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:20,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:20,687 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:20,694 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-23 22:29:20,695 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:29:20,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2023-11-23 22:29:20,721 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-23 22:29:20,721 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret5=0} Honda state: {fibonacci_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-23 22:29:20,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:20,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:20,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:20,746 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:20,753 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-23 22:29:20,754 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:29:20,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2023-11-23 22:29:20,781 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-23 22:29:20,781 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_~n=0} Honda state: {fibonacci_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-23 22:29:20,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:20,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:20,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:20,806 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:20,813 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-23 22:29:20,813 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:29:20,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2023-11-23 22:29:20,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:20,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:20,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:20,865 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:20,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2023-11-23 22:29:20,873 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-23 22:29:20,873 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:29:20,958 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-23 22:29:20,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:20,966 INFO L210 LassoAnalysis]: Preferences: [2023-11-23 22:29:20,967 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-23 22:29:20,967 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-23 22:29:20,967 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-23 22:29:20,967 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-23 22:29:20,967 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:20,967 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-23 22:29:20,967 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-23 22:29:20,968 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci01-2.c_Iteration1_Loop [2023-11-23 22:29:20,968 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-23 22:29:20,968 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-23 22:29:20,970 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:20,973 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:20,976 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:20,979 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:20,988 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:21,035 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-23 22:29:21,040 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-23 22:29:21,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:21,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:21,043 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:21,050 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 [2023-11-23 22:29:21,063 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-23 22:29:21,063 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-23 22:29:21,063 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-23 22:29:21,064 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-23 22:29:21,064 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-23 22:29:21,068 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-23 22:29:21,069 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-23 22:29:21,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2023-11-23 22:29:21,074 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-23 22:29:21,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:21,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:21,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:21,101 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:21,114 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 [2023-11-23 22:29:21,127 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-23 22:29:21,127 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-23 22:29:21,127 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-23 22:29:21,127 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-23 22:29:21,127 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-23 22:29:21,132 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-23 22:29:21,132 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-23 22:29:21,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2023-11-23 22:29:21,144 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-23 22:29:21,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:21,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:21,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:21,175 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:21,182 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 [2023-11-23 22:29:21,194 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-23 22:29:21,195 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-23 22:29:21,195 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-23 22:29:21,195 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-23 22:29:21,195 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-23 22:29:21,196 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-23 22:29:21,196 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-23 22:29:21,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2023-11-23 22:29:21,199 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-23 22:29:21,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:21,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:21,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:21,222 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:21,230 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 [2023-11-23 22:29:21,242 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-23 22:29:21,243 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-23 22:29:21,243 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-23 22:29:21,243 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-23 22:29:21,243 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-23 22:29:21,244 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-23 22:29:21,244 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-23 22:29:21,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2023-11-23 22:29:21,260 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-23 22:29:21,274 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-23 22:29:21,274 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-23 22:29:21,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:21,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:21,310 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:21,316 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-23 22:29:21,316 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-23 22:29:21,317 INFO L513 LassoAnalysis]: Proved termination. [2023-11-23 22:29:21,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2023-11-23 22:29:21,317 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2023-11-23 22:29:21,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:21,344 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-23 22:29:21,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:21,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:21,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 22:29:21,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:21,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:21,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:29:21,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:21,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:29:21,557 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 [2023-11-23 22:29:21,559 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 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 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2023-11-23 22:29:21,670 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 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 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 52 states and 64 transitions. Complement of second has 12 states. [2023-11-23 22:29:21,673 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 [2023-11-23 22:29:21,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2023-11-23 22:29:21,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2023-11-23 22:29:21,681 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 4 letters. Loop has 4 letters. [2023-11-23 22:29:21,683 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:29:21,683 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 8 letters. Loop has 4 letters. [2023-11-23 22:29:21,684 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:29:21,684 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 4 letters. Loop has 8 letters. [2023-11-23 22:29:21,684 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:29:21,685 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 52 states and 64 transitions. [2023-11-23 22:29:21,690 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-23 22:29:21,698 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 52 states to 26 states and 35 transitions. [2023-11-23 22:29:21,699 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 18 [2023-11-23 22:29:21,699 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2023-11-23 22:29:21,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 35 transitions. [2023-11-23 22:29:21,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-23 22:29:21,701 INFO L218 hiAutomatonCegarLoop]: Abstraction has 26 states and 35 transitions. [2023-11-23 22:29:21,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states and 35 transitions. [2023-11-23 22:29:21,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2023-11-23 22:29:21,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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) [2023-11-23 22:29:21,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2023-11-23 22:29:21,747 INFO L240 hiAutomatonCegarLoop]: Abstraction has 21 states and 27 transitions. [2023-11-23 22:29:21,747 INFO L428 stractBuchiCegarLoop]: Abstraction has 21 states and 27 transitions. [2023-11-23 22:29:21,747 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2023-11-23 22:29:21,748 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states and 27 transitions. [2023-11-23 22:29:21,749 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-23 22:29:21,749 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-23 22:29:21,749 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-23 22:29:21,750 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:29:21,750 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:29:21,750 INFO L748 eck$LassoCheckResult]: Stem: 141#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(16, 2);call #Ultimate.allocInit(12, 3); 142#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet6#1, main_#t~ret7#1, main_~x~0#1, main_~result~0#1;havoc main_#t~nondet6#1;main_~x~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1; 143#L29 assume !(main_~x~0#1 < 1); 130#L31 call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 146#$Ultimate##0 ~n := #in~n; 137#L17 assume !(~n < 1); 138#L19 assume !(1 == ~n); 131#L22 call #t~ret4 := fibonacci(~n - 1);< 139#$Ultimate##0 ~n := #in~n; 134#L17 assume ~n < 1;#res := 0; 135#fibonacciFINAL assume true; 140#fibonacciEXIT >#36#return; 129#L22-1 [2023-11-23 22:29:21,750 INFO L750 eck$LassoCheckResult]: Loop: 129#L22-1 call #t~ret5 := fibonacci(~n - 2);< 133#$Ultimate##0 ~n := #in~n; 149#L17 assume !(~n < 1); 148#L19 assume !(1 == ~n); 132#L22 call #t~ret4 := fibonacci(~n - 1);< 133#$Ultimate##0 ~n := #in~n; 149#L17 assume ~n < 1;#res := 0; 145#fibonacciFINAL assume true; 147#fibonacciEXIT >#36#return; 129#L22-1 [2023-11-23 22:29:21,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:21,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1689937232, now seen corresponding path program 1 times [2023-11-23 22:29:21,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:21,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147607573] [2023-11-23 22:29:21,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:21,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:21,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:21,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:21,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-23 22:29:21,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:21,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:29:21,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:29:21,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147607573] [2023-11-23 22:29:21,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147607573] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:29:21,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:29:21,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:29:21,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764649435] [2023-11-23 22:29:21,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:29:21,935 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-23 22:29:21,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:21,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1163555262, now seen corresponding path program 1 times [2023-11-23 22:29:21,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:21,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951531078] [2023-11-23 22:29:21,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:21,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:21,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:22,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-23 22:29:22,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:29:22,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:29:22,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951531078] [2023-11-23 22:29:22,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951531078] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:29:22,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:29:22,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:29:22,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533454487] [2023-11-23 22:29:22,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:29:22,065 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-11-23 22:29:22,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:29:22,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:29:22,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:29:22,069 INFO L87 Difference]: Start difference. First operand 21 states and 27 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) [2023-11-23 22:29:22,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:29:22,143 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2023-11-23 22:29:22,143 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 33 transitions. [2023-11-23 22:29:22,145 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-23 22:29:22,147 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 25 states and 31 transitions. [2023-11-23 22:29:22,147 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 21 [2023-11-23 22:29:22,147 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2023-11-23 22:29:22,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 31 transitions. [2023-11-23 22:29:22,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-23 22:29:22,148 INFO L218 hiAutomatonCegarLoop]: Abstraction has 25 states and 31 transitions. [2023-11-23 22:29:22,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 31 transitions. [2023-11-23 22:29:22,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-23 22:29:22,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 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) [2023-11-23 22:29:22,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2023-11-23 22:29:22,152 INFO L240 hiAutomatonCegarLoop]: Abstraction has 25 states and 31 transitions. [2023-11-23 22:29:22,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:29:22,154 INFO L428 stractBuchiCegarLoop]: Abstraction has 25 states and 31 transitions. [2023-11-23 22:29:22,154 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2023-11-23 22:29:22,154 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 25 states and 31 transitions. [2023-11-23 22:29:22,155 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-23 22:29:22,155 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-23 22:29:22,156 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-23 22:29:22,157 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:29:22,157 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2023-11-23 22:29:22,157 INFO L748 eck$LassoCheckResult]: Stem: 216#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(16, 2);call #Ultimate.allocInit(12, 3); 217#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; 218#L29 assume !(main_~x~0#1 < 1); 205#L31 call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 220#$Ultimate##0 ~n := #in~n; 211#L17 assume !(~n < 1); 212#L19 assume !(1 == ~n); 206#L22 call #t~ret4 := fibonacci(~n - 1);< 213#$Ultimate##0 ~n := #in~n; 209#L17 assume !(~n < 1); 210#L19 assume 1 == ~n;#res := 1; 221#fibonacciFINAL assume true; 225#fibonacciEXIT >#36#return; 204#L22-1 [2023-11-23 22:29:22,157 INFO L750 eck$LassoCheckResult]: Loop: 204#L22-1 call #t~ret5 := fibonacci(~n - 2);< 208#$Ultimate##0 ~n := #in~n; 227#L17 assume !(~n < 1); 226#L19 assume !(1 == ~n); 207#L22 call #t~ret4 := fibonacci(~n - 1);< 208#$Ultimate##0 ~n := #in~n; 227#L17 assume !(~n < 1); 226#L19 assume !(1 == ~n); 207#L22 call #t~ret4 := fibonacci(~n - 1);< 208#$Ultimate##0 ~n := #in~n; 227#L17 assume !(~n < 1); 226#L19 assume 1 == ~n;#res := 1; 222#fibonacciFINAL assume true; 223#fibonacciEXIT >#36#return; 204#L22-1 call #t~ret5 := fibonacci(~n - 2);< 208#$Ultimate##0 ~n := #in~n; 227#L17 assume ~n < 1;#res := 0; 228#fibonacciFINAL assume true; 214#fibonacciEXIT >#38#return; 215#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 219#fibonacciFINAL assume true; 224#fibonacciEXIT >#36#return; 204#L22-1 [2023-11-23 22:29:22,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:22,158 INFO L85 PathProgramCache]: Analyzing trace with hash -848422362, now seen corresponding path program 1 times [2023-11-23 22:29:22,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:22,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398697819] [2023-11-23 22:29:22,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:22,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:29:22,171 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 22:29:22,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:29:22,192 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-23 22:29:22,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:22,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1698967994, now seen corresponding path program 1 times [2023-11-23 22:29:22,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:22,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518893320] [2023-11-23 22:29:22,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:22,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:22,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:29:22,219 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 22:29:22,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:29:22,242 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-23 22:29:22,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:22,242 INFO L85 PathProgramCache]: Analyzing trace with hash 250475039, now seen corresponding path program 1 times [2023-11-23 22:29:22,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:22,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69172748] [2023-11-23 22:29:22,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:22,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:22,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:22,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-23 22:29:22,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:22,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-23 22:29:22,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:22,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:29:22,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:22,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 22:29:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-23 22:29:22,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:29:22,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69172748] [2023-11-23 22:29:22,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69172748] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:29:22,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795142787] [2023-11-23 22:29:22,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:22,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:22,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:22,493 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:29:22,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 22:29:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:22,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:29:22,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:22,585 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-23 22:29:22,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:29:22,683 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-23 22:29:22,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795142787] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:29:22,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:29:22,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2023-11-23 22:29:22,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208595463] [2023-11-23 22:29:22,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:29:23,051 INFO L210 LassoAnalysis]: Preferences: [2023-11-23 22:29:23,051 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-23 22:29:23,051 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-23 22:29:23,051 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-23 22:29:23,051 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-23 22:29:23,051 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:23,052 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-23 22:29:23,052 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-23 22:29:23,052 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci01-2.c_Iteration3_Loop [2023-11-23 22:29:23,052 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-23 22:29:23,052 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-23 22:29:23,053 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:23,077 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:23,080 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:23,083 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:23,154 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-23 22:29:23,154 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-23 22:29:23,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:23,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:23,155 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:23,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2023-11-23 22:29:23,177 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-23 22:29:23,177 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:29:23,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:23,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:23,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:23,221 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:23,224 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-23 22:29:23,224 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:29:23,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2023-11-23 22:29:23,561 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-23 22:29:23,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:23,565 INFO L210 LassoAnalysis]: Preferences: [2023-11-23 22:29:23,565 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-23 22:29:23,565 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-23 22:29:23,565 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-23 22:29:23,565 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-23 22:29:23,566 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:23,566 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-23 22:29:23,566 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-23 22:29:23,566 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci01-2.c_Iteration3_Loop [2023-11-23 22:29:23,566 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-23 22:29:23,566 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-23 22:29:23,567 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:23,582 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:23,585 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:23,593 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:23,678 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-23 22:29:23,678 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-23 22:29:23,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:23,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:23,680 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:23,684 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 [2023-11-23 22:29:23,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2023-11-23 22:29:23,695 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-23 22:29:23,695 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-23 22:29:23,696 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-23 22:29:23,696 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-23 22:29:23,696 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-23 22:29:23,697 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-23 22:29:23,697 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-23 22:29:23,698 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-23 22:29:23,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:23,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:23,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:23,712 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:23,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2023-11-23 22:29:23,715 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 [2023-11-23 22:29:23,727 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-23 22:29:23,727 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-23 22:29:23,727 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-23 22:29:23,728 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-23 22:29:23,728 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-23 22:29:23,728 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-23 22:29:23,729 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-23 22:29:23,752 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-23 22:29:23,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:23,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:23,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:23,773 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:23,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2023-11-23 22:29:23,777 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 [2023-11-23 22:29:23,789 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-23 22:29:23,790 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-23 22:29:23,790 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-23 22:29:23,790 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-23 22:29:23,790 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-23 22:29:23,792 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-23 22:29:23,792 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-23 22:29:23,801 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-23 22:29:23,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:23,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:23,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:23,827 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:23,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2023-11-23 22:29:23,837 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 [2023-11-23 22:29:23,850 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-23 22:29:23,850 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-23 22:29:23,850 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-23 22:29:23,850 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-23 22:29:23,851 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-23 22:29:23,853 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-23 22:29:23,853 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-23 22:29:23,864 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-23 22:29:23,904 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-23 22:29:23,904 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-23 22:29:23,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:23,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:23,907 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:23,911 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-23 22:29:23,911 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-23 22:29:23,911 INFO L513 LassoAnalysis]: Proved termination. [2023-11-23 22:29:23,911 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2023-11-23 22:29:23,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2023-11-23 22:29:23,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:23,935 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-23 22:29:23,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:23,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:29:23,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:24,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:24,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 22:29:24,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:24,308 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 22:29:24,309 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 [2023-11-23 22:29:24,310 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 31 transitions. cyclomatic complexity: 8 Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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) [2023-11-23 22:29:24,655 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 25 states and 31 transitions. cyclomatic complexity: 8. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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 160 states and 216 transitions. Complement of second has 48 states. [2023-11-23 22:29:24,656 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 [2023-11-23 22:29:24,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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) [2023-11-23 22:29:24,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 42 transitions. [2023-11-23 22:29:24,661 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 42 transitions. Stem has 13 letters. Loop has 22 letters. [2023-11-23 22:29:24,662 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:29:24,663 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 42 transitions. Stem has 35 letters. Loop has 22 letters. [2023-11-23 22:29:24,665 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:29:24,665 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 42 transitions. Stem has 13 letters. Loop has 44 letters. [2023-11-23 22:29:24,671 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:29:24,671 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 160 states and 216 transitions. [2023-11-23 22:29:24,688 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2023-11-23 22:29:24,694 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 160 states to 129 states and 181 transitions. [2023-11-23 22:29:24,694 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 75 [2023-11-23 22:29:24,695 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 80 [2023-11-23 22:29:24,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 129 states and 181 transitions. [2023-11-23 22:29:24,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-23 22:29:24,695 INFO L218 hiAutomatonCegarLoop]: Abstraction has 129 states and 181 transitions. [2023-11-23 22:29:24,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states and 181 transitions. [2023-11-23 22:29:24,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 107. [2023-11-23 22:29:24,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 71 states have internal predecessors, (82), 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) [2023-11-23 22:29:24,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 141 transitions. [2023-11-23 22:29:24,725 INFO L240 hiAutomatonCegarLoop]: Abstraction has 107 states and 141 transitions. [2023-11-23 22:29:24,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:29:24,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 22:29:24,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:29:24,726 INFO L87 Difference]: Start difference. First operand 107 states and 141 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 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) [2023-11-23 22:29:24,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:29:24,811 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2023-11-23 22:29:24,811 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 45 states and 58 transitions. [2023-11-23 22:29:24,816 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-23 22:29:24,822 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 45 states to 42 states and 54 transitions. [2023-11-23 22:29:24,822 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 35 [2023-11-23 22:29:24,824 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 35 [2023-11-23 22:29:24,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 54 transitions. [2023-11-23 22:29:24,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-23 22:29:24,826 INFO L218 hiAutomatonCegarLoop]: Abstraction has 42 states and 54 transitions. [2023-11-23 22:29:24,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states and 54 transitions. [2023-11-23 22:29:24,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2023-11-23 22:29:24,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 28 states have internal predecessors, (29), 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) [2023-11-23 22:29:24,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2023-11-23 22:29:24,840 INFO L240 hiAutomatonCegarLoop]: Abstraction has 39 states and 48 transitions. [2023-11-23 22:29:24,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:29:24,842 INFO L428 stractBuchiCegarLoop]: Abstraction has 39 states and 48 transitions. [2023-11-23 22:29:24,842 INFO L335 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2023-11-23 22:29:24,842 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 39 states and 48 transitions. [2023-11-23 22:29:24,845 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-23 22:29:24,845 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-23 22:29:24,845 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-23 22:29:24,851 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:29:24,851 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2023-11-23 22:29:24,851 INFO L748 eck$LassoCheckResult]: Stem: 989#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(16, 2);call #Ultimate.allocInit(12, 3); 990#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet6#1, main_#t~ret7#1, main_~x~0#1, main_~result~0#1;havoc main_#t~nondet6#1;main_~x~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1; 991#L29 assume !(main_~x~0#1 < 1); 981#L31 call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 994#$Ultimate##0 ~n := #in~n; 985#L17 assume !(~n < 1); 986#L19 assume !(1 == ~n); 980#L22 call #t~ret4 := fibonacci(~n - 1);< 982#$Ultimate##0 ~n := #in~n; 999#L17 assume !(~n < 1); 1012#L19 assume !(1 == ~n); 992#L22 call #t~ret4 := fibonacci(~n - 1);< 982#$Ultimate##0 ~n := #in~n; 998#L17 assume !(~n < 1); 995#L19 assume 1 == ~n;#res := 1; 996#fibonacciFINAL assume true; 1010#fibonacciEXIT >#36#return; 1007#L22-1 call #t~ret5 := fibonacci(~n - 2);< 1008#$Ultimate##0 ~n := #in~n; 1011#L17 assume ~n < 1;#res := 0; 1009#fibonacciFINAL assume true; 1006#fibonacciEXIT >#38#return; 1005#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1004#fibonacciFINAL assume true; 1003#fibonacciEXIT >#36#return; 977#L22-1 [2023-11-23 22:29:24,852 INFO L750 eck$LassoCheckResult]: Loop: 977#L22-1 call #t~ret5 := fibonacci(~n - 2);< 979#$Ultimate##0 ~n := #in~n; 1002#L17 assume !(~n < 1); 1000#L19 assume !(1 == ~n); 976#L22 call #t~ret4 := fibonacci(~n - 1);< 979#$Ultimate##0 ~n := #in~n; 1002#L17 assume !(~n < 1); 1000#L19 assume !(1 == ~n); 976#L22 call #t~ret4 := fibonacci(~n - 1);< 979#$Ultimate##0 ~n := #in~n; 1002#L17 assume !(~n < 1); 1000#L19 assume 1 == ~n;#res := 1; 1001#fibonacciFINAL assume true; 1013#fibonacciEXIT >#36#return; 975#L22-1 call #t~ret5 := fibonacci(~n - 2);< 978#$Ultimate##0 ~n := #in~n; 983#L17 assume ~n < 1;#res := 0; 984#fibonacciFINAL assume true; 987#fibonacciEXIT >#38#return; 988#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 993#fibonacciFINAL assume true; 997#fibonacciEXIT >#36#return; 977#L22-1 [2023-11-23 22:29:24,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:24,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1885512200, now seen corresponding path program 2 times [2023-11-23 22:29:24,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:24,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290037047] [2023-11-23 22:29:24,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:24,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:24,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:29:24,873 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 22:29:24,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:29:24,892 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-23 22:29:24,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:24,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1698967994, now seen corresponding path program 2 times [2023-11-23 22:29:24,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:24,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143788564] [2023-11-23 22:29:24,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:24,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:24,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:29:24,910 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 22:29:24,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:29:24,928 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-23 22:29:24,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:24,931 INFO L85 PathProgramCache]: Analyzing trace with hash -360938367, now seen corresponding path program 3 times [2023-11-23 22:29:24,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:24,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448887921] [2023-11-23 22:29:24,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:24,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:24,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:25,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-23 22:29:25,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:25,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:29:25,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:25,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 22:29:25,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:25,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-23 22:29:25,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:25,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:29:25,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:25,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 22:29:25,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:25,164 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 16 proven. 46 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-23 22:29:25,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:29:25,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448887921] [2023-11-23 22:29:25,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448887921] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:29:25,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724608798] [2023-11-23 22:29:25,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 22:29:25,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:25,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:25,167 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:29:25,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-23 22:29:25,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-23 22:29:25,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:29:25,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 22:29:25,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:25,337 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 35 proven. 47 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-23 22:29:25,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:29:25,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-23 22:29:25,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724608798] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:29:25,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:29:25,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 12] total 21 [2023-11-23 22:29:25,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502522055] [2023-11-23 22:29:25,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:29:26,110 INFO L210 LassoAnalysis]: Preferences: [2023-11-23 22:29:26,110 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-23 22:29:26,110 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-23 22:29:26,110 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-23 22:29:26,110 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-23 22:29:26,111 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:26,111 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-23 22:29:26,111 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-23 22:29:26,111 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci01-2.c_Iteration4_Loop [2023-11-23 22:29:26,111 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-23 22:29:26,111 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-23 22:29:26,112 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:26,126 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:26,128 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:26,133 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:26,205 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-23 22:29:26,205 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-23 22:29:26,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:26,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:26,209 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:26,214 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-23 22:29:26,214 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:29:26,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2023-11-23 22:29:26,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:26,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:26,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:26,259 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:26,268 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-23 22:29:26,268 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:29:26,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2023-11-23 22:29:26,638 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-23 22:29:26,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:26,642 INFO L210 LassoAnalysis]: Preferences: [2023-11-23 22:29:26,643 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-23 22:29:26,643 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-23 22:29:26,643 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-23 22:29:26,643 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-23 22:29:26,643 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:26,643 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-23 22:29:26,643 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-23 22:29:26,643 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci01-2.c_Iteration4_Loop [2023-11-23 22:29:26,643 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-23 22:29:26,643 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-23 22:29:26,644 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:26,658 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:26,662 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:26,665 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:26,739 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-23 22:29:26,739 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-23 22:29:26,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:26,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:26,740 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:26,749 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 [2023-11-23 22:29:26,762 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-23 22:29:26,762 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-23 22:29:26,762 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-23 22:29:26,762 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-23 22:29:26,762 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-23 22:29:26,764 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-23 22:29:26,764 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-23 22:29:26,773 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-23 22:29:26,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2023-11-23 22:29:26,777 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-23 22:29:26,777 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-23 22:29:26,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:26,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:26,780 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:26,781 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-23 22:29:26,781 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-23 22:29:26,782 INFO L513 LassoAnalysis]: Proved termination. [2023-11-23 22:29:26,782 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2023-11-23 22:29:26,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2023-11-23 22:29:26,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:26,806 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-23 22:29:26,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:26,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:26,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 22:29:26,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:27,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:27,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 22:29:27,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:27,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:27,344 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 22:29:27,345 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 [2023-11-23 22:29:27,345 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11 Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 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) [2023-11-23 22:29:27,467 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 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 46 states and 55 transitions. Complement of second has 11 states. [2023-11-23 22:29:27,467 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 [2023-11-23 22:29:27,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 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) [2023-11-23 22:29:27,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 18 transitions. [2023-11-23 22:29:27,471 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 18 transitions. Stem has 25 letters. Loop has 22 letters. [2023-11-23 22:29:27,472 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:29:27,472 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-23 22:29:27,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:27,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:27,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 22:29:27,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:27,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:27,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 22:29:27,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:27,897 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 22:29:27,899 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 [2023-11-23 22:29:27,901 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11 Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 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) [2023-11-23 22:29:28,026 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 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 46 states and 55 transitions. Complement of second has 11 states. [2023-11-23 22:29:28,027 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 [2023-11-23 22:29:28,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 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) [2023-11-23 22:29:28,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 18 transitions. [2023-11-23 22:29:28,030 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 18 transitions. Stem has 25 letters. Loop has 22 letters. [2023-11-23 22:29:28,030 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:29:28,030 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-23 22:29:28,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:28,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:28,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 22:29:28,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:28,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:28,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 22:29:28,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:28,439 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 22:29:28,440 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 [2023-11-23 22:29:28,440 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11 Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 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) [2023-11-23 22:29:28,757 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 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 345 states and 444 transitions. Complement of second has 125 states. [2023-11-23 22:29:28,761 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 [2023-11-23 22:29:28,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 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) [2023-11-23 22:29:28,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 47 transitions. [2023-11-23 22:29:28,763 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 47 transitions. Stem has 25 letters. Loop has 22 letters. [2023-11-23 22:29:28,765 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:29:28,766 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 47 transitions. Stem has 47 letters. Loop has 22 letters. [2023-11-23 22:29:28,767 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:29:28,767 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 47 transitions. Stem has 25 letters. Loop has 44 letters. [2023-11-23 22:29:28,771 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:29:28,775 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 345 states and 444 transitions. [2023-11-23 22:29:28,786 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2023-11-23 22:29:28,801 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 345 states to 220 states and 297 transitions. [2023-11-23 22:29:28,801 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 99 [2023-11-23 22:29:28,802 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 116 [2023-11-23 22:29:28,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 220 states and 297 transitions. [2023-11-23 22:29:28,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-23 22:29:28,804 INFO L218 hiAutomatonCegarLoop]: Abstraction has 220 states and 297 transitions. [2023-11-23 22:29:28,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states and 297 transitions. [2023-11-23 22:29:28,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 172. [2023-11-23 22:29:28,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 107 states have (on average 1.1401869158878504) internal successors, (122), 112 states have internal predecessors, (122), 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) [2023-11-23 22:29:28,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 223 transitions. [2023-11-23 22:29:28,839 INFO L240 hiAutomatonCegarLoop]: Abstraction has 172 states and 223 transitions. [2023-11-23 22:29:28,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:29:28,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-23 22:29:28,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-11-23 22:29:28,841 INFO L87 Difference]: Start difference. First operand 172 states and 223 transitions. Second operand has 21 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 18 states have internal predecessors, (50), 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) [2023-11-23 22:29:29,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:29:29,162 INFO L93 Difference]: Finished difference Result 349 states and 503 transitions. [2023-11-23 22:29:29,162 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 349 states and 503 transitions. [2023-11-23 22:29:29,168 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2023-11-23 22:29:29,176 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 349 states to 339 states and 490 transitions. [2023-11-23 22:29:29,176 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 173 [2023-11-23 22:29:29,177 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 193 [2023-11-23 22:29:29,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 339 states and 490 transitions. [2023-11-23 22:29:29,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-23 22:29:29,177 INFO L218 hiAutomatonCegarLoop]: Abstraction has 339 states and 490 transitions. [2023-11-23 22:29:29,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states and 490 transitions. [2023-11-23 22:29:29,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 274. [2023-11-23 22:29:29,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 171 states have (on average 1.128654970760234) internal successors, (193), 174 states have internal predecessors, (193), 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) [2023-11-23 22:29:29,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 401 transitions. [2023-11-23 22:29:29,206 INFO L240 hiAutomatonCegarLoop]: Abstraction has 274 states and 401 transitions. [2023-11-23 22:29:29,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-23 22:29:29,207 INFO L428 stractBuchiCegarLoop]: Abstraction has 274 states and 401 transitions. [2023-11-23 22:29:29,208 INFO L335 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2023-11-23 22:29:29,208 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 274 states and 401 transitions. [2023-11-23 22:29:29,210 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2023-11-23 22:29:29,211 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-23 22:29:29,211 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-23 22:29:29,213 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [12, 10, 9, 7, 7, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1] [2023-11-23 22:29:29,213 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2023-11-23 22:29:29,213 INFO L748 eck$LassoCheckResult]: Stem: 2992#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(16, 2);call #Ultimate.allocInit(12, 3); 2993#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; 2994#L29 assume !(main_~x~0#1 < 1); 2995#L31 call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 2999#$Ultimate##0 ~n := #in~n; 3035#L17 assume !(~n < 1); 3033#L19 assume !(1 == ~n); 3025#L22 call #t~ret4 := fibonacci(~n - 1);< 3028#$Ultimate##0 ~n := #in~n; 3034#L17 assume !(~n < 1); 3032#L19 assume !(1 == ~n); 3026#L22 call #t~ret4 := fibonacci(~n - 1);< 3028#$Ultimate##0 ~n := #in~n; 3034#L17 assume !(~n < 1); 3032#L19 assume !(1 == ~n); 3026#L22 call #t~ret4 := fibonacci(~n - 1);< 3028#$Ultimate##0 ~n := #in~n; 3034#L17 assume !(~n < 1); 3032#L19 assume !(1 == ~n); 3026#L22 call #t~ret4 := fibonacci(~n - 1);< 3028#$Ultimate##0 ~n := #in~n; 3036#L17 assume !(~n < 1); 3135#L19 assume 1 == ~n;#res := 1; 3134#fibonacciFINAL assume true; 3131#fibonacciEXIT >#36#return; 3126#L22-1 call #t~ret5 := fibonacci(~n - 2);< 3128#$Ultimate##0 ~n := #in~n; 3132#L17 assume ~n < 1;#res := 0; 3129#fibonacciFINAL assume true; 3125#fibonacciEXIT >#38#return; 3123#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 3122#fibonacciFINAL assume true; 3121#fibonacciEXIT >#36#return; 3065#L22-1 call #t~ret5 := fibonacci(~n - 2);< 3067#$Ultimate##0 ~n := #in~n; 3118#L17 assume !(~n < 1); 3114#L19 assume 1 == ~n;#res := 1; 3013#fibonacciFINAL assume true; 3064#fibonacciEXIT >#38#return; 3060#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 3052#fibonacciFINAL assume true; 3041#fibonacciEXIT >#36#return; 3040#L22-1 call #t~ret5 := fibonacci(~n - 2);< 3043#$Ultimate##0 ~n := #in~n; 3119#L17 assume !(~n < 1); 3115#L19 assume !(1 == ~n); 3116#L22 call #t~ret4 := fibonacci(~n - 1);< 3236#$Ultimate##0 ~n := #in~n; 3170#L17 assume !(~n < 1); 3171#L19 assume 1 == ~n;#res := 1; 3237#fibonacciFINAL assume true; 3234#fibonacciEXIT >#36#return; 3056#L22-1 call #t~ret5 := fibonacci(~n - 2);< 3059#$Ultimate##0 ~n := #in~n; 3124#L17 assume ~n < 1;#res := 0; 3069#fibonacciFINAL assume true; 3055#fibonacciEXIT >#38#return; 3058#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 3051#fibonacciFINAL assume true; 3039#fibonacciEXIT >#38#return; 3027#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 3030#fibonacciFINAL assume true; 3024#fibonacciEXIT >#36#return; 3012#L22-1 call #t~ret5 := fibonacci(~n - 2);< 3020#$Ultimate##0 ~n := #in~n; 3016#L17 assume !(~n < 1); 3010#L19 assume !(1 == ~n); 3015#L22 call #t~ret4 := fibonacci(~n - 1);< 3235#$Ultimate##0 ~n := #in~n; 3211#L17 assume !(~n < 1); 3212#L19 assume !(1 == ~n); 3194#L22 call #t~ret4 := fibonacci(~n - 1);< 3197#$Ultimate##0 [2023-11-23 22:29:29,214 INFO L750 eck$LassoCheckResult]: Loop: 3197#$Ultimate##0 ~n := #in~n; 3209#L17 assume !(~n < 1); 3207#L19 assume !(1 == ~n); 3192#L22 call #t~ret4 := fibonacci(~n - 1);< 3197#$Ultimate##0 [2023-11-23 22:29:29,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:29,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1406603621, now seen corresponding path program 4 times [2023-11-23 22:29:29,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:29,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756731999] [2023-11-23 22:29:29,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:29,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:29,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:29:29,231 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 22:29:29,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:29:29,249 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-23 22:29:29,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:29,250 INFO L85 PathProgramCache]: Analyzing trace with hash 927648, now seen corresponding path program 2 times [2023-11-23 22:29:29,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:29,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230325733] [2023-11-23 22:29:29,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:29,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:29,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:29:29,253 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 22:29:29,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:29:29,256 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-23 22:29:29,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:29,256 INFO L85 PathProgramCache]: Analyzing trace with hash 2055878970, now seen corresponding path program 5 times [2023-11-23 22:29:29,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:29,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290054455] [2023-11-23 22:29:29,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:29,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:29,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:29,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-23 22:29:29,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:29,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:29:29,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:29,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:29:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:29,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:29:29,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:29,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 22:29:29,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:29,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-23 22:29:29,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:29,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 22:29:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:29,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:29:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:29,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 22:29:29,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:29,687 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 110 proven. 115 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-11-23 22:29:29,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:29:29,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290054455] [2023-11-23 22:29:29,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290054455] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:29:29,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845786861] [2023-11-23 22:29:29,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 22:29:29,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:29,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:29,689 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:29:29,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-23 22:29:29,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-11-23 22:29:29,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:29:29,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 22:29:29,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:29,849 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 110 proven. 115 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-11-23 22:29:29,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:29:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 110 proven. 130 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-11-23 22:29:30,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845786861] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:29:30,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:29:30,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 15] total 20 [2023-11-23 22:29:30,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082544450] [2023-11-23 22:29:30,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:29:30,553 INFO L210 LassoAnalysis]: Preferences: [2023-11-23 22:29:30,553 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-23 22:29:30,553 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-23 22:29:30,553 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-23 22:29:30,553 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-23 22:29:30,553 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:30,553 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-23 22:29:30,553 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-23 22:29:30,554 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci01-2.c_Iteration5_Loop [2023-11-23 22:29:30,554 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-23 22:29:30,554 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-23 22:29:30,555 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:30,557 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:30,560 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:30,567 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:30,570 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:30,604 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-23 22:29:30,604 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-23 22:29:30,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:30,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:30,605 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:30,609 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-23 22:29:30,610 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:29:30,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2023-11-23 22:29:30,632 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-23 22:29:30,632 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret4=0} Honda state: {fibonacci_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-23 22:29:30,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:30,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:30,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:30,658 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:30,677 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-23 22:29:30,677 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:29:30,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2023-11-23 22:29:30,698 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-23 22:29:30,698 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-23 22:29:30,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:30,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:30,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:30,724 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:30,726 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-23 22:29:30,726 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:29:30,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2023-11-23 22:29:30,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:30,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:30,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:30,772 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:30,777 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-23 22:29:30,777 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:29:30,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2023-11-23 22:29:30,823 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-23 22:29:30,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Ended with exit code 0 [2023-11-23 22:29:30,826 INFO L210 LassoAnalysis]: Preferences: [2023-11-23 22:29:30,826 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-23 22:29:30,826 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-23 22:29:30,826 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-23 22:29:30,826 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-23 22:29:30,826 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:30,826 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-23 22:29:30,827 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-23 22:29:30,827 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci01-2.c_Iteration5_Loop [2023-11-23 22:29:30,827 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-23 22:29:30,827 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-23 22:29:30,828 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:30,842 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:30,845 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:30,852 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:30,855 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:30,892 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-23 22:29:30,892 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-23 22:29:30,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:30,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:30,905 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:30,913 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 [2023-11-23 22:29:30,925 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-23 22:29:30,925 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-23 22:29:30,925 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-23 22:29:30,925 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-23 22:29:30,926 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-23 22:29:30,926 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-23 22:29:30,926 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-23 22:29:30,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2023-11-23 22:29:30,940 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-23 22:29:30,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:30,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:30,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:30,965 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:30,967 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 [2023-11-23 22:29:30,979 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-23 22:29:30,980 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-23 22:29:30,980 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-23 22:29:30,980 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-23 22:29:30,980 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-23 22:29:30,981 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-23 22:29:30,981 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-23 22:29:30,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2023-11-23 22:29:30,992 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-23 22:29:31,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:31,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:31,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:31,012 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:31,018 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 [2023-11-23 22:29:31,030 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-23 22:29:31,031 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-23 22:29:31,031 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-23 22:29:31,031 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-23 22:29:31,031 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-23 22:29:31,032 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-23 22:29:31,032 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-23 22:29:31,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2023-11-23 22:29:31,052 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-23 22:29:31,055 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2023-11-23 22:29:31,055 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-11-23 22:29:31,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:31,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:31,058 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:31,060 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-23 22:29:31,060 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-23 22:29:31,060 INFO L513 LassoAnalysis]: Proved termination. [2023-11-23 22:29:31,060 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2023-11-23 22:29:31,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2023-11-23 22:29:31,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:31,085 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-23 22:29:31,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:31,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:31,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-23 22:29:31,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:31,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:31,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:31,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:29:31,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:31,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:29:31,873 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 [2023-11-23 22:29:31,873 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 274 states and 401 transitions. cyclomatic complexity: 131 Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-11-23 22:29:31,947 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 274 states and 401 transitions. cyclomatic complexity: 131. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 296 states and 427 transitions. Complement of second has 13 states. [2023-11-23 22:29:31,948 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 [2023-11-23 22:29:31,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-11-23 22:29:31,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 14 transitions. [2023-11-23 22:29:31,950 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 72 letters. Loop has 4 letters. [2023-11-23 22:29:31,950 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:29:31,950 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-23 22:29:31,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:32,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:32,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-23 22:29:32,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:32,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:32,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:29:32,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:32,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:29:32,630 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 [2023-11-23 22:29:32,630 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 274 states and 401 transitions. cyclomatic complexity: 131 Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-11-23 22:29:32,697 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 274 states and 401 transitions. cyclomatic complexity: 131. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 296 states and 427 transitions. Complement of second has 13 states. [2023-11-23 22:29:32,697 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 [2023-11-23 22:29:32,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-11-23 22:29:32,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 14 transitions. [2023-11-23 22:29:32,699 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 72 letters. Loop has 4 letters. [2023-11-23 22:29:32,699 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:29:32,699 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-23 22:29:32,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:32,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:32,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-23 22:29:32,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:33,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:33,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:29:33,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:33,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:29:33,365 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 [2023-11-23 22:29:33,365 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 274 states and 401 transitions. cyclomatic complexity: 131 Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-11-23 22:29:33,447 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 274 states and 401 transitions. cyclomatic complexity: 131. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 349 states and 484 transitions. Complement of second has 14 states. [2023-11-23 22:29:33,448 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 [2023-11-23 22:29:33,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-11-23 22:29:33,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 22 transitions. [2023-11-23 22:29:33,449 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 22 transitions. Stem has 72 letters. Loop has 4 letters. [2023-11-23 22:29:33,450 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:29:33,450 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 22 transitions. Stem has 76 letters. Loop has 4 letters. [2023-11-23 22:29:33,451 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:29:33,452 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 22 transitions. Stem has 72 letters. Loop has 8 letters. [2023-11-23 22:29:33,452 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:29:33,453 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 349 states and 484 transitions. [2023-11-23 22:29:33,460 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2023-11-23 22:29:33,466 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 349 states to 288 states and 417 transitions. [2023-11-23 22:29:33,466 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 138 [2023-11-23 22:29:33,467 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 143 [2023-11-23 22:29:33,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 288 states and 417 transitions. [2023-11-23 22:29:33,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-23 22:29:33,469 INFO L218 hiAutomatonCegarLoop]: Abstraction has 288 states and 417 transitions. [2023-11-23 22:29:33,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states and 417 transitions. [2023-11-23 22:29:33,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 280. [2023-11-23 22:29:33,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 176 states have (on average 1.125) internal successors, (198), 179 states have internal predecessors, (198), 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) [2023-11-23 22:29:33,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 409 transitions. [2023-11-23 22:29:33,494 INFO L240 hiAutomatonCegarLoop]: Abstraction has 280 states and 409 transitions. [2023-11-23 22:29:33,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:29:33,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-23 22:29:33,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2023-11-23 22:29:33,497 INFO L87 Difference]: Start difference. First operand 280 states and 409 transitions. Second operand has 20 states, 15 states have (on average 3.066666666666667) internal successors, (46), 16 states have internal predecessors, (46), 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) [2023-11-23 22:29:33,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:29:33,688 INFO L93 Difference]: Finished difference Result 496 states and 761 transitions. [2023-11-23 22:29:33,688 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 496 states and 761 transitions. [2023-11-23 22:29:33,696 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2023-11-23 22:29:33,707 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 496 states to 491 states and 754 transitions. [2023-11-23 22:29:33,707 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 256 [2023-11-23 22:29:33,708 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 263 [2023-11-23 22:29:33,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 491 states and 754 transitions. [2023-11-23 22:29:33,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-23 22:29:33,709 INFO L218 hiAutomatonCegarLoop]: Abstraction has 491 states and 754 transitions. [2023-11-23 22:29:33,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states and 754 transitions. [2023-11-23 22:29:33,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 371. [2023-11-23 22:29:33,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 232 states have (on average 1.146551724137931) internal successors, (266), 233 states have internal predecessors, (266), 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) [2023-11-23 22:29:33,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 583 transitions. [2023-11-23 22:29:33,733 INFO L240 hiAutomatonCegarLoop]: Abstraction has 371 states and 583 transitions. [2023-11-23 22:29:33,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 22:29:33,735 INFO L428 stractBuchiCegarLoop]: Abstraction has 371 states and 583 transitions. [2023-11-23 22:29:33,735 INFO L335 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2023-11-23 22:29:33,735 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 371 states and 583 transitions. [2023-11-23 22:29:33,739 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2023-11-23 22:29:33,739 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-23 22:29:33,739 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-23 22:29:33,746 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [19, 16, 15, 11, 10, 8, 8, 7, 7, 5, 3, 1, 1, 1, 1] [2023-11-23 22:29:33,746 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2023-11-23 22:29:33,748 INFO L748 eck$LassoCheckResult]: Stem: 6362#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(16, 2);call #Ultimate.allocInit(12, 3); 6363#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; 6364#L29 assume !(main_~x~0#1 < 1); 6365#L31 call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 6370#$Ultimate##0 ~n := #in~n; 6454#L17 assume !(~n < 1); 6453#L19 assume !(1 == ~n); 6408#L22 call #t~ret4 := fibonacci(~n - 1);< 6419#$Ultimate##0 ~n := #in~n; 6442#L17 assume !(~n < 1); 6440#L19 assume !(1 == ~n); 6407#L22 call #t~ret4 := fibonacci(~n - 1);< 6413#$Ultimate##0 ~n := #in~n; 6445#L17 assume !(~n < 1); 6441#L19 assume !(1 == ~n); 6406#L22 call #t~ret4 := fibonacci(~n - 1);< 6413#$Ultimate##0 ~n := #in~n; 6445#L17 assume !(~n < 1); 6441#L19 assume !(1 == ~n); 6406#L22 call #t~ret4 := fibonacci(~n - 1);< 6413#$Ultimate##0 ~n := #in~n; 6445#L17 assume !(~n < 1); 6441#L19 assume !(1 == ~n); 6406#L22 call #t~ret4 := fibonacci(~n - 1);< 6413#$Ultimate##0 ~n := #in~n; 6452#L17 assume !(~n < 1); 6559#L19 assume 1 == ~n;#res := 1; 6558#fibonacciFINAL assume true; 6556#fibonacciEXIT >#36#return; 6553#L22-1 call #t~ret5 := fibonacci(~n - 2);< 6554#$Ultimate##0 ~n := #in~n; 6557#L17 assume ~n < 1;#res := 0; 6555#fibonacciFINAL assume true; 6552#fibonacciEXIT >#38#return; 6548#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 6537#fibonacciFINAL assume true; 6489#fibonacciEXIT >#36#return; 6447#L22-1 call #t~ret5 := fibonacci(~n - 2);< 6450#$Ultimate##0 ~n := #in~n; 6503#L17 assume !(~n < 1); 6491#L19 assume 1 == ~n;#res := 1; 6387#fibonacciFINAL assume true; 6446#fibonacciEXIT >#38#return; 6444#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 6443#fibonacciFINAL assume true; 6439#fibonacciEXIT >#36#return; 6436#L22-1 call #t~ret5 := fibonacci(~n - 2);< 6438#$Ultimate##0 ~n := #in~n; 6493#L17 assume !(~n < 1); 6490#L19 assume !(1 == ~n); 6479#L22 call #t~ret4 := fibonacci(~n - 1);< 6623#$Ultimate##0 ~n := #in~n; 6622#L17 assume !(~n < 1); 6484#L19 assume 1 == ~n;#res := 1; 6483#fibonacciFINAL assume true; 6478#fibonacciEXIT >#36#return; 6381#L22-1 call #t~ret5 := fibonacci(~n - 2);< 6377#$Ultimate##0 ~n := #in~n; 6380#L17 assume ~n < 1;#res := 0; 6487#fibonacciFINAL assume true; 6471#fibonacciEXIT >#38#return; 6474#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 6485#fibonacciFINAL assume true; 6435#fibonacciEXIT >#38#return; 6417#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 6415#fibonacciFINAL assume true; 6411#fibonacciEXIT >#36#return; 6386#L22-1 call #t~ret5 := fibonacci(~n - 2);< 6392#$Ultimate##0 ~n := #in~n; 6393#L17 assume !(~n < 1); 6385#L19 assume !(1 == ~n); 6388#L22 call #t~ret4 := fibonacci(~n - 1);< 6507#$Ultimate##0 ~n := #in~n; 6550#L17 assume !(~n < 1); 6549#L19 assume !(1 == ~n); 6526#L22 call #t~ret4 := fibonacci(~n - 1);< 6527#$Ultimate##0 ~n := #in~n; 6532#L17 assume !(~n < 1); 6530#L19 assume 1 == ~n;#res := 1; 6529#fibonacciFINAL assume true; 6521#fibonacciEXIT >#36#return; 6515#L22-1 call #t~ret5 := fibonacci(~n - 2);< 6518#$Ultimate##0 ~n := #in~n; 6528#L17 assume ~n < 1;#res := 0; 6519#fibonacciFINAL assume true; 6512#fibonacciEXIT >#38#return; 6510#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 6508#fibonacciFINAL assume true; 6505#fibonacciEXIT >#36#return; 6449#L22-1 call #t~ret5 := fibonacci(~n - 2);< 6451#$Ultimate##0 ~n := #in~n; 6604#L17 assume !(~n < 1); 6475#L19 assume 1 == ~n;#res := 1; 6470#fibonacciFINAL assume true; 6448#fibonacciEXIT >#38#return; 6444#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 6443#fibonacciFINAL assume true; 6439#fibonacciEXIT >#38#return; 6412#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 6531#fibonacciFINAL assume true; 6418#fibonacciEXIT >#36#return; 6394#L22-1 call #t~ret5 := fibonacci(~n - 2);< 6395#$Ultimate##0 ~n := #in~n; 6482#L17 assume !(~n < 1); 6402#L19 assume !(1 == ~n); 6354#L22 call #t~ret4 := fibonacci(~n - 1);< 6631#$Ultimate##0 ~n := #in~n; 6625#L17 assume !(~n < 1); 6626#L19 assume !(1 == ~n); 6352#L22 call #t~ret4 := fibonacci(~n - 1);< 6355#$Ultimate##0 ~n := #in~n; 6630#L17 assume !(~n < 1); 6652#L19 assume !(1 == ~n); 6372#L22 [2023-11-23 22:29:33,749 INFO L750 eck$LassoCheckResult]: Loop: 6372#L22 call #t~ret4 := fibonacci(~n - 1);< 6355#$Ultimate##0 ~n := #in~n; 6630#L17 assume !(~n < 1); 6652#L19 assume !(1 == ~n); 6372#L22 [2023-11-23 22:29:33,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:33,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1148192889, now seen corresponding path program 6 times [2023-11-23 22:29:33,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:33,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181744454] [2023-11-23 22:29:33,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:33,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:29:33,771 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 22:29:33,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:29:33,793 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-23 22:29:33,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:33,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1966338, now seen corresponding path program 3 times [2023-11-23 22:29:33,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:33,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610130591] [2023-11-23 22:29:33,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:33,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:33,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:29:33,797 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 22:29:33,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:29:33,800 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-23 22:29:33,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:33,801 INFO L85 PathProgramCache]: Analyzing trace with hash 65342842, now seen corresponding path program 7 times [2023-11-23 22:29:33,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:33,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58981695] [2023-11-23 22:29:33,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:33,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:33,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:34,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-23 22:29:34,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:34,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:29:34,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:34,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:29:34,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:34,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:29:34,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:34,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:29:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:34,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 22:29:34,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:34,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-23 22:29:34,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:34,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 22:29:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:34,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:29:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:34,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 22:29:34,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:34,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-23 22:29:34,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:34,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:29:34,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:34,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:29:34,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:34,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 22:29:34,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:34,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-23 22:29:34,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:34,491 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 231 proven. 268 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-11-23 22:29:34,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:29:34,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58981695] [2023-11-23 22:29:34,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58981695] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:29:34,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017841373] [2023-11-23 22:29:34,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 22:29:34,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:34,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:34,494 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:29:34,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-23 22:29:34,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:34,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-23 22:29:34,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:34,685 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 231 proven. 268 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-11-23 22:29:34,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:29:35,761 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 231 proven. 294 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-11-23 22:29:35,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017841373] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:29:35,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:29:35,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 17] total 23 [2023-11-23 22:29:35,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404471952] [2023-11-23 22:29:35,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:29:35,821 INFO L210 LassoAnalysis]: Preferences: [2023-11-23 22:29:35,821 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-23 22:29:35,822 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-23 22:29:35,822 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-23 22:29:35,822 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-23 22:29:35,822 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:35,822 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-23 22:29:35,822 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-23 22:29:35,822 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci01-2.c_Iteration6_Loop [2023-11-23 22:29:35,823 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-23 22:29:35,823 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-23 22:29:35,823 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:35,826 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:35,828 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:35,830 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:35,894 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-23 22:29:35,894 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-23 22:29:35,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:35,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:35,895 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:35,898 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-23 22:29:35,899 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:29:35,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2023-11-23 22:29:35,922 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-23 22:29:35,922 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret4=0} Honda state: {fibonacci_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-23 22:29:35,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:35,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:35,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:35,947 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:35,950 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-23 22:29:35,950 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:29:35,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2023-11-23 22:29:35,983 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-23 22:29:35,983 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret5=0} Honda state: {fibonacci_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-23 22:29:36,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:36,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:36,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:36,005 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:36,010 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-23 22:29:36,010 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:29:36,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2023-11-23 22:29:36,029 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-23 22:29:36,029 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-23 22:29:36,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:36,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:36,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:36,055 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:36,058 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-23 22:29:36,058 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:29:36,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2023-11-23 22:29:36,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:36,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:36,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:36,113 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:36,117 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-23 22:29:36,117 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-23 22:29:36,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2023-11-23 22:29:38,107 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-23 22:29:38,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Ended with exit code 0 [2023-11-23 22:29:38,112 INFO L210 LassoAnalysis]: Preferences: [2023-11-23 22:29:38,112 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-23 22:29:38,112 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-23 22:29:38,112 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-23 22:29:38,112 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-23 22:29:38,112 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:38,112 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-23 22:29:38,112 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-23 22:29:38,113 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci01-2.c_Iteration6_Loop [2023-11-23 22:29:38,113 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-23 22:29:38,113 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-23 22:29:38,114 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:38,121 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:38,123 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:38,126 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-23 22:29:38,177 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-23 22:29:38,178 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-23 22:29:38,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:38,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:38,179 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:38,197 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 [2023-11-23 22:29:38,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2023-11-23 22:29:38,210 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-23 22:29:38,210 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-23 22:29:38,210 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-23 22:29:38,210 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-23 22:29:38,210 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-23 22:29:38,211 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-23 22:29:38,211 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-23 22:29:38,228 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-23 22:29:38,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:38,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:38,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:38,250 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:38,257 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-23 22:29:38,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2023-11-23 22:29:38,269 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-23 22:29:38,269 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-23 22:29:38,270 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-23 22:29:38,270 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-23 22:29:38,270 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-23 22:29:38,271 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-23 22:29:38,271 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-23 22:29:38,280 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-23 22:29:38,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:38,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:38,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:38,297 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:38,302 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 [2023-11-23 22:29:38,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2023-11-23 22:29:38,313 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-23 22:29:38,313 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-23 22:29:38,313 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-23 22:29:38,313 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-23 22:29:38,313 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-23 22:29:38,314 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-23 22:29:38,314 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-23 22:29:38,316 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-23 22:29:38,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:38,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:38,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:38,329 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:38,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2023-11-23 22:29:38,331 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 [2023-11-23 22:29:38,341 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-23 22:29:38,341 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-23 22:29:38,341 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-23 22:29:38,342 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-23 22:29:38,342 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-23 22:29:38,343 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-23 22:29:38,343 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-23 22:29:38,346 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-23 22:29:38,350 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-23 22:29:38,350 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-23 22:29:38,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-23 22:29:38,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:38,352 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:38,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Waiting until timeout for monitored process [2023-11-23 22:29:38,353 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-23 22:29:38,353 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-23 22:29:38,353 INFO L513 LassoAnalysis]: Proved termination. [2023-11-23 22:29:38,353 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2023-11-23 22:29:38,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:38,368 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-23 22:29:38,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:38,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:38,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-23 22:29:38,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:39,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:39,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:29:39,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:39,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:29:39,516 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 [2023-11-23 22:29:39,517 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 371 states and 583 transitions. cyclomatic complexity: 216 Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2023-11-23 22:29:39,591 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 371 states and 583 transitions. cyclomatic complexity: 216. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 380 states and 593 transitions. Complement of second has 18 states. [2023-11-23 22:29:39,592 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 [2023-11-23 22:29:39,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2023-11-23 22:29:39,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 14 transitions. [2023-11-23 22:29:39,593 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 14 transitions. Stem has 113 letters. Loop has 4 letters. [2023-11-23 22:29:39,593 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:29:39,594 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-23 22:29:39,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:39,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:39,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-23 22:29:39,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:40,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:40,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:29:40,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:40,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:29:40,747 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 [2023-11-23 22:29:40,748 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 371 states and 583 transitions. cyclomatic complexity: 216 Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2023-11-23 22:29:40,852 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 371 states and 583 transitions. cyclomatic complexity: 216. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 386 states and 599 transitions. Complement of second has 17 states. [2023-11-23 22:29:40,853 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 [2023-11-23 22:29:40,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2023-11-23 22:29:40,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 17 transitions. [2023-11-23 22:29:40,854 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 17 transitions. Stem has 113 letters. Loop has 4 letters. [2023-11-23 22:29:40,854 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:29:40,855 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-23 22:29:40,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:41,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:41,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-23 22:29:41,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:41,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:29:41,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:41,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:29:41,997 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 [2023-11-23 22:29:41,997 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 371 states and 583 transitions. cyclomatic complexity: 216 Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2023-11-23 22:29:42,085 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 371 states and 583 transitions. cyclomatic complexity: 216. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 451 states and 691 transitions. Complement of second has 27 states. [2023-11-23 22:29:42,086 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 [2023-11-23 22:29:42,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2023-11-23 22:29:42,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 23 transitions. [2023-11-23 22:29:42,087 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 23 transitions. Stem has 113 letters. Loop has 4 letters. [2023-11-23 22:29:42,087 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:29:42,087 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 23 transitions. Stem has 117 letters. Loop has 4 letters. [2023-11-23 22:29:42,088 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:29:42,088 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 23 transitions. Stem has 113 letters. Loop has 8 letters. [2023-11-23 22:29:42,088 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-23 22:29:42,089 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 451 states and 691 transitions. [2023-11-23 22:29:42,096 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2023-11-23 22:29:42,103 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 451 states to 371 states and 583 transitions. [2023-11-23 22:29:42,103 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 161 [2023-11-23 22:29:42,104 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 183 [2023-11-23 22:29:42,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 371 states and 583 transitions. [2023-11-23 22:29:42,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-23 22:29:42,109 INFO L218 hiAutomatonCegarLoop]: Abstraction has 371 states and 583 transitions. [2023-11-23 22:29:42,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states and 583 transitions. [2023-11-23 22:29:42,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2023-11-23 22:29:42,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 232 states have (on average 1.146551724137931) internal successors, (266), 233 states have internal predecessors, (266), 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) [2023-11-23 22:29:42,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 583 transitions. [2023-11-23 22:29:42,129 INFO L240 hiAutomatonCegarLoop]: Abstraction has 371 states and 583 transitions. [2023-11-23 22:29:42,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:29:42,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-23 22:29:42,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2023-11-23 22:29:42,130 INFO L87 Difference]: Start difference. First operand 371 states and 583 transitions. Second operand has 24 states, 18 states have (on average 3.0) internal successors, (54), 19 states have internal predecessors, (54), 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) [2023-11-23 22:29:42,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:29:42,408 INFO L93 Difference]: Finished difference Result 555 states and 873 transitions. [2023-11-23 22:29:42,408 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 555 states and 873 transitions. [2023-11-23 22:29:42,418 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-11-23 22:29:42,418 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 555 states to 0 states and 0 transitions. [2023-11-23 22:29:42,419 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2023-11-23 22:29:42,419 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2023-11-23 22:29:42,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2023-11-23 22:29:42,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:29:42,419 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-23 22:29:42,419 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-23 22:29:42,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 22:29:42,420 INFO L428 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-23 22:29:42,420 INFO L335 stractBuchiCegarLoop]: ======== Iteration 7 ============ [2023-11-23 22:29:42,421 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2023-11-23 22:29:42,421 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-11-23 22:29:42,421 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2023-11-23 22:29:42,429 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 23.11 10:29:42 BoogieIcfgContainer [2023-11-23 22:29:42,429 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2023-11-23 22:29:42,430 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-23 22:29:42,430 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-23 22:29:42,430 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-23 22:29:42,431 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:29:19" (3/4) ... [2023-11-23 22:29:42,433 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-23 22:29:42,434 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-23 22:29:42,435 INFO L158 Benchmark]: Toolchain (without parser) took 23070.67ms. Allocated memory was 151.0MB in the beginning and 264.2MB in the end (delta: 113.2MB). Free memory was 113.9MB in the beginning and 163.8MB in the end (delta: -49.9MB). Peak memory consumption was 63.9MB. Max. memory is 16.1GB. [2023-11-23 22:29:42,435 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 119.5MB. Free memory is still 87.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 22:29:42,436 INFO L158 Benchmark]: CACSL2BoogieTranslator took 251.79ms. Allocated memory is still 151.0MB. Free memory was 113.9MB in the beginning and 115.7MB in the end (delta: -1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 22:29:42,436 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.24ms. Allocated memory is still 151.0MB. Free memory was 115.7MB in the beginning and 114.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 22:29:42,436 INFO L158 Benchmark]: Boogie Preprocessor took 30.84ms. Allocated memory is still 151.0MB. Free memory was 114.0MB in the beginning and 112.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 22:29:42,437 INFO L158 Benchmark]: RCFGBuilder took 243.75ms. Allocated memory is still 151.0MB. Free memory was 112.8MB in the beginning and 102.9MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-23 22:29:42,437 INFO L158 Benchmark]: BuchiAutomizer took 22500.30ms. Allocated memory was 151.0MB in the beginning and 264.2MB in the end (delta: 113.2MB). Free memory was 102.9MB in the beginning and 163.8MB in the end (delta: -60.9MB). Peak memory consumption was 53.5MB. Max. memory is 16.1GB. [2023-11-23 22:29:42,438 INFO L158 Benchmark]: Witness Printer took 4.68ms. Allocated memory is still 264.2MB. Free memory was 163.8MB in the beginning and 163.8MB in the end (delta: 2.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 22:29:42,440 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 119.5MB. Free memory is still 87.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 251.79ms. Allocated memory is still 151.0MB. Free memory was 113.9MB in the beginning and 115.7MB in the end (delta: -1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.24ms. Allocated memory is still 151.0MB. Free memory was 115.7MB in the beginning and 114.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.84ms. Allocated memory is still 151.0MB. Free memory was 114.0MB in the beginning and 112.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 243.75ms. Allocated memory is still 151.0MB. Free memory was 112.8MB in the beginning and 102.9MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * BuchiAutomizer took 22500.30ms. Allocated memory was 151.0MB in the beginning and 264.2MB in the end (delta: 113.2MB). Free memory was 102.9MB in the beginning and 163.8MB in the end (delta: -60.9MB). Peak memory consumption was 53.5MB. Max. memory is 16.1GB. * Witness Printer took 4.68ms. Allocated memory is still 264.2MB. Free memory was 163.8MB in the beginning and 163.8MB in the end (delta: 2.0kB). Peak memory consumption was 2.1MB. 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 22.4s and 7 iterations. TraceHistogramMax:19. Analysis of lassos took 11.8s. Construction of modules took 0.9s. Büchi inclusion checks took 9.2s. 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, 636 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 588 mSDsluCounter, 514 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 308 mSDsCounter, 432 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 815 IncrementalHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 432 mSolverCounterUnsat, 206 mSDtfsCounter, 815 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: 32ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 8 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 3.4s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2023-11-23 22:29:42,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:42,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-23 22:29:42,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-23 22:29:43,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-23 22:29:43,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30d8d6db-09b2-4881-bed9-27269ef32960/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE