./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive/Fibonacci02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 9bd2c7ff 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_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive/Fibonacci02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b7261cadd839cd02322bb28945f92ad1bd2170c0a65dd385996b5ff81cbb1de7 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:50:37,545 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:50:37,665 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Termination-32bit-Automizer_Default.epf [2023-11-19 07:50:37,678 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:50:37,679 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:50:37,715 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:50:37,717 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:50:37,717 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:50:37,719 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:50:37,724 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:50:37,725 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:50:37,726 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2023-11-19 07:50:37,726 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2023-11-19 07:50:37,728 INFO L153 SettingsManager]: * Use old map elimination=false [2023-11-19 07:50:37,728 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2023-11-19 07:50:37,729 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2023-11-19 07:50:37,729 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2023-11-19 07:50:37,730 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:50:37,731 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2023-11-19 07:50:37,731 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:50:37,732 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:50:37,732 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:50:37,733 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:50:37,733 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2023-11-19 07:50:37,734 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2023-11-19 07:50:37,734 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2023-11-19 07:50:37,735 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:50:37,735 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:50:37,736 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:50:37,736 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2023-11-19 07:50:37,738 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:50:37,738 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:50:37,738 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:50:37,739 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:50:37,739 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:50:37,740 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2023-11-19 07:50:37,740 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_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b7261cadd839cd02322bb28945f92ad1bd2170c0a65dd385996b5ff81cbb1de7 [2023-11-19 07:50:38,081 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:50:38,117 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:50:38,120 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:50:38,122 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:50:38,123 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:50:38,124 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/recursive/Fibonacci02.c [2023-11-19 07:50:41,365 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:50:41,561 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:50:41,562 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/sv-benchmarks/c/recursive/Fibonacci02.c [2023-11-19 07:50:41,580 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/data/ec82b3800/3a965280ecec4d99a2e21a48dec62a4e/FLAGd7982c062 [2023-11-19 07:50:41,594 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/data/ec82b3800/3a965280ecec4d99a2e21a48dec62a4e [2023-11-19 07:50:41,597 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:50:41,599 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:50:41,601 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:50:41,601 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:50:41,611 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:50:41,612 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:50:41" (1/1) ... [2023-11-19 07:50:41,613 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6531e308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:41, skipping insertion in model container [2023-11-19 07:50:41,614 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:50:41" (1/1) ... [2023-11-19 07:50:41,641 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:50:41,835 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:50:41,855 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:50:41,874 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:50:41,894 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:50:41,895 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:41 WrapperNode [2023-11-19 07:50:41,895 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:50:41,898 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:50:41,898 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:50:41,898 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:50:41,908 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:41" (1/1) ... [2023-11-19 07:50:41,921 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:41" (1/1) ... [2023-11-19 07:50:41,942 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 20 [2023-11-19 07:50:41,943 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:50:41,943 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:50:41,945 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:50:41,945 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:50:41,956 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:41" (1/1) ... [2023-11-19 07:50:41,962 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:41" (1/1) ... [2023-11-19 07:50:41,964 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:41" (1/1) ... [2023-11-19 07:50:41,966 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:41" (1/1) ... [2023-11-19 07:50:41,971 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:41" (1/1) ... [2023-11-19 07:50:41,973 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:41" (1/1) ... [2023-11-19 07:50:41,974 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:41" (1/1) ... [2023-11-19 07:50:41,975 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:41" (1/1) ... [2023-11-19 07:50:41,985 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:50:41,986 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:50:41,987 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:50:41,987 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:50:41,989 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:41" (1/1) ... [2023-11-19 07:50:41,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:50:42,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:42,031 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:42,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2023-11-19 07:50:42,072 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2023-11-19 07:50:42,073 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2023-11-19 07:50:42,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:50:42,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:50:42,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:50:42,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:50:42,147 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:50:42,150 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:50:42,261 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:50:42,270 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:50:42,270 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 07:50:42,274 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:50:42 BoogieIcfgContainer [2023-11-19 07:50:42,274 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:50:42,275 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2023-11-19 07:50:42,275 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2023-11-19 07:50:42,279 INFO L274 PluginConnector]: BuchiAutomizer initialized [2023-11-19 07:50:42,280 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-19 07:50:42,280 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.11 07:50:41" (1/3) ... [2023-11-19 07:50:42,281 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@399ad487 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.11 07:50:42, skipping insertion in model container [2023-11-19 07:50:42,282 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-19 07:50:42,282 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:41" (2/3) ... [2023-11-19 07:50:42,282 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@399ad487 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.11 07:50:42, skipping insertion in model container [2023-11-19 07:50:42,282 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-19 07:50:42,283 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:50:42" (3/3) ... [2023-11-19 07:50:42,284 INFO L332 chiAutomizerObserver]: Analyzing ICFG Fibonacci02.c [2023-11-19 07:50:42,356 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2023-11-19 07:50:42,356 INFO L304 stractBuchiCegarLoop]: Hoare is false [2023-11-19 07:50:42,357 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2023-11-19 07:50:42,357 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2023-11-19 07:50:42,357 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2023-11-19 07:50:42,357 INFO L308 stractBuchiCegarLoop]: Difference is false [2023-11-19 07:50:42,358 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2023-11-19 07:50:42,358 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2023-11-19 07:50:42,363 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:50:42,386 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-19 07:50:42,386 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:50:42,386 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:50:42,392 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-11-19 07:50:42,393 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2023-11-19 07:50:42,393 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2023-11-19 07:50:42,393 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:50:42,396 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-19 07:50:42,397 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:50:42,397 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:50:42,397 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-11-19 07:50:42,398 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2023-11-19 07:50:42,405 INFO L748 eck$LassoCheckResult]: Stem: 17#$Ultimate##0true assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 12#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 9; 8#L29true call main_#t~ret6#1 := fibonacci(main_~x~0#1);< 14#$Ultimate##0true [2023-11-19 07:50:42,405 INFO L750 eck$LassoCheckResult]: Loop: 14#$Ultimate##0true ~n := #in~n; 4#L17true assume !(~n < 1); 18#L19true assume !(1 == ~n); 16#L22true call #t~ret4 := fibonacci(~n - 1);< 14#$Ultimate##0true [2023-11-19 07:50:42,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:42,411 INFO L85 PathProgramCache]: Analyzing trace with hash 42783, now seen corresponding path program 1 times [2023-11-19 07:50:42,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:42,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580981319] [2023-11-19 07:50:42,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:42,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:50:42,535 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:50:42,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:50:42,569 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:50:42,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:42,578 INFO L85 PathProgramCache]: Analyzing trace with hash 927643, now seen corresponding path program 1 times [2023-11-19 07:50:42,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:42,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676589905] [2023-11-19 07:50:42,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:42,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:42,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:50:42,627 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:50:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:50:42,635 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:50:42,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:42,637 INFO L85 PathProgramCache]: Analyzing trace with hash 856297401, now seen corresponding path program 1 times [2023-11-19 07:50:42,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:42,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15618827] [2023-11-19 07:50:42,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:42,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:42,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:50:42,651 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:50:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:50:42,698 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:50:42,869 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:50:42,869 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:50:42,869 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:50:42,869 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:50:42,870 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 07:50:42,870 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:50:42,870 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:50:42,870 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:50:42,870 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration1_Loop [2023-11-19 07:50:42,870 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:50:42,871 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:50:42,885 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:50:42,906 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:50:42,910 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:50:42,914 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:50:42,927 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:50:42,995 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:50:42,996 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 07:50:42,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:50:42,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:43,001 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:43,009 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:50:43,009 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:50:43,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2023-11-19 07:50:43,037 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:50:43,037 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:50:43,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:43,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:50:43,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:43,076 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:43,084 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:50:43,085 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:50:43,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2023-11-19 07:50:43,111 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:50:43,111 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret5=0} Honda state: {fibonacci_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:50:43,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:43,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:50:43,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:43,138 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:43,146 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:50:43,146 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:50:43,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2023-11-19 07:50:43,163 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:50:43,163 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_~n=0} Honda state: {fibonacci_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:50:43,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:43,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:50:43,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:43,183 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:43,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2023-11-19 07:50:43,188 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:50:43,188 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:50:43,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:43,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:50:43,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:43,214 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:43,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2023-11-19 07:50:43,217 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 07:50:43,217 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:50:43,300 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-19 07:50:43,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:43,304 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:50:43,304 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:50:43,304 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:50:43,304 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:50:43,304 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-19 07:50:43,304 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:50:43,304 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:50:43,304 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:50:43,305 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration1_Loop [2023-11-19 07:50:43,305 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:50:43,305 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:50:43,306 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:50:43,310 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:50:43,313 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:50:43,316 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:50:43,326 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:50:43,376 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:50:43,380 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-19 07:50:43,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:50:43,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:43,383 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:43,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2023-11-19 07:50:43,393 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:50:43,405 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:50:43,406 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:50:43,406 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:50:43,406 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:50:43,407 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:50:43,409 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:50:43,409 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:50:43,424 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:50:43,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:43,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:50:43,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:43,450 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:43,457 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:50:43,469 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:50:43,469 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:50:43,470 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:50:43,470 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:50:43,470 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:50:43,471 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:50:43,471 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:50:43,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2023-11-19 07:50:43,495 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:50:43,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:43,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:50:43,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:43,519 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:43,533 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:50:43,545 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:50:43,546 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:50:43,546 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:50:43,546 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:50:43,546 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:50:43,547 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:50:43,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2023-11-19 07:50:43,547 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:50:43,557 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:50:43,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:43,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:50:43,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:43,583 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:43,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2023-11-19 07:50:43,595 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:50:43,605 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:50:43,606 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:50:43,606 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:50:43,606 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:50:43,606 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:50:43,607 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:50:43,607 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:50:43,617 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-19 07:50:43,625 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-19 07:50:43,625 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-19 07:50:43,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:50:43,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:43,656 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:43,664 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-19 07:50:43,664 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-19 07:50:43,664 INFO L513 LassoAnalysis]: Proved termination. [2023-11-19 07:50:43,665 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2023-11-19 07:50:43,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2023-11-19 07:50:43,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Ended with exit code 0 [2023-11-19 07:50:43,692 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-19 07:50:43,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:43,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:43,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:50:43,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:43,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:50:43,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:43,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:43,917 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2023-11-19 07:50:43,921 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:44,076 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3). Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 48 states and 60 transitions. Complement of second has 12 states. [2023-11-19 07:50:44,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2023-11-19 07:50:44,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:44,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2023-11-19 07:50:44,088 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2023-11-19 07:50:44,089 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:50:44,089 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2023-11-19 07:50:44,090 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:50:44,090 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2023-11-19 07:50:44,090 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:50:44,091 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 60 transitions. [2023-11-19 07:50:44,096 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-19 07:50:44,104 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 25 states and 34 transitions. [2023-11-19 07:50:44,105 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2023-11-19 07:50:44,106 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2023-11-19 07:50:44,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2023-11-19 07:50:44,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:50:44,107 INFO L218 hiAutomatonCegarLoop]: Abstraction has 25 states and 34 transitions. [2023-11-19 07:50:44,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2023-11-19 07:50:44,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2023-11-19 07:50:44,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-19 07:50:44,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2023-11-19 07:50:44,142 INFO L240 hiAutomatonCegarLoop]: Abstraction has 20 states and 26 transitions. [2023-11-19 07:50:44,142 INFO L428 stractBuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2023-11-19 07:50:44,143 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2023-11-19 07:50:44,143 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2023-11-19 07:50:44,144 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-19 07:50:44,144 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:50:44,144 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:50:44,145 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:44,145 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:44,146 INFO L748 eck$LassoCheckResult]: Stem: 133#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 134#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 9; 123#L29 call main_#t~ret6#1 := fibonacci(main_~x~0#1);< 135#$Ultimate##0 ~n := #in~n; 129#L17 assume !(~n < 1); 130#L19 assume !(1 == ~n); 122#L22 call #t~ret4 := fibonacci(~n - 1);< 131#$Ultimate##0 ~n := #in~n; 126#L17 assume ~n < 1;#res := 0; 127#fibonacciFINAL assume true; 132#fibonacciEXIT >#31#return; 121#L22-1 [2023-11-19 07:50:44,146 INFO L750 eck$LassoCheckResult]: Loop: 121#L22-1 call #t~ret5 := fibonacci(~n - 2);< 125#$Ultimate##0 ~n := #in~n; 140#L17 assume !(~n < 1); 139#L19 assume !(1 == ~n); 124#L22 call #t~ret4 := fibonacci(~n - 1);< 125#$Ultimate##0 ~n := #in~n; 140#L17 assume ~n < 1;#res := 0; 137#fibonacciFINAL assume true; 138#fibonacciEXIT >#31#return; 121#L22-1 [2023-11-19 07:50:44,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:44,147 INFO L85 PathProgramCache]: Analyzing trace with hash 2073663503, now seen corresponding path program 1 times [2023-11-19 07:50:44,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:44,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022074311] [2023-11-19 07:50:44,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:44,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:44,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:44,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-19 07:50:44,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:44,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:50:44,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:44,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022074311] [2023-11-19 07:50:44,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022074311] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:44,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:44,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:50:44,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244284638] [2023-11-19 07:50:44,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:44,296 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-19 07:50:44,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:44,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1606275375, now seen corresponding path program 1 times [2023-11-19 07:50:44,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:44,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644351366] [2023-11-19 07:50:44,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:44,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:44,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:50:44,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:44,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:50:44,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:44,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644351366] [2023-11-19 07:50:44,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644351366] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:44,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:44,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:50:44,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107062913] [2023-11-19 07:50:44,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:44,386 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-11-19 07:50:44,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:44,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:50:44,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:50:44,391 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. cyclomatic complexity: 8 Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 07:50:44,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:44,476 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2023-11-19 07:50:44,476 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2023-11-19 07:50:44,478 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-19 07:50:44,479 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2023-11-19 07:50:44,479 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2023-11-19 07:50:44,480 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2023-11-19 07:50:44,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2023-11-19 07:50:44,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:50:44,480 INFO L218 hiAutomatonCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-11-19 07:50:44,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2023-11-19 07:50:44,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-19 07:50:44,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-19 07:50:44,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2023-11-19 07:50:44,484 INFO L240 hiAutomatonCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-11-19 07:50:44,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:50:44,488 INFO L428 stractBuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-11-19 07:50:44,488 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2023-11-19 07:50:44,488 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2023-11-19 07:50:44,492 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-19 07:50:44,492 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:50:44,492 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:50:44,493 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:44,493 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:44,493 INFO L748 eck$LassoCheckResult]: Stem: 207#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 208#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 9; 195#L29 call main_#t~ret6#1 := fibonacci(main_~x~0#1);< 209#$Ultimate##0 ~n := #in~n; 202#L17 assume !(~n < 1); 203#L19 assume !(1 == ~n); 196#L22 call #t~ret4 := fibonacci(~n - 1);< 204#$Ultimate##0 ~n := #in~n; 212#L17 assume !(~n < 1); 217#L19 assume 1 == ~n;#res := 1; 216#fibonacciFINAL assume true; 215#fibonacciEXIT >#31#return; 194#L22-1 [2023-11-19 07:50:44,493 INFO L750 eck$LassoCheckResult]: Loop: 194#L22-1 call #t~ret5 := fibonacci(~n - 2);< 198#$Ultimate##0 ~n := #in~n; 199#L17 assume !(~n < 1); 201#L19 assume !(1 == ~n); 197#L22 call #t~ret4 := fibonacci(~n - 1);< 198#$Ultimate##0 ~n := #in~n; 199#L17 assume !(~n < 1); 201#L19 assume 1 == ~n;#res := 1; 211#fibonacciFINAL assume true; 213#fibonacciEXIT >#31#return; 194#L22-1 [2023-11-19 07:50:44,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:44,494 INFO L85 PathProgramCache]: Analyzing trace with hash -140916419, now seen corresponding path program 1 times [2023-11-19 07:50:44,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:44,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899320253] [2023-11-19 07:50:44,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:44,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:44,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:44,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-19 07:50:44,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:44,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:44,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:44,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899320253] [2023-11-19 07:50:44,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899320253] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:44,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313243225] [2023-11-19 07:50:44,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:44,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:44,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:44,672 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:44,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Ended with exit code 0 [2023-11-19 07:50:44,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:50:44,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:44,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:50:44,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:44,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:44,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:44,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:44,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313243225] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:44,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:44,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-11-19 07:50:44,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78821848] [2023-11-19 07:50:44,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:44,960 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-19 07:50:44,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:44,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1745046499, now seen corresponding path program 1 times [2023-11-19 07:50:44,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:44,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638285716] [2023-11-19 07:50:44,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:44,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:50:44,987 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:50:44,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:50:44,994 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:50:45,158 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:50:45,158 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:50:45,159 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:50:45,159 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:50:45,159 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 07:50:45,159 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:50:45,159 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:50:45,159 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:50:45,159 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration3_Loop [2023-11-19 07:50:45,160 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:50:45,160 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:50:45,161 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:50:45,168 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:50:45,170 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:50:45,173 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:50:45,177 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:50:45,226 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:50:45,226 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 07:50:45,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:50:45,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:45,228 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:45,232 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:50:45,232 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:50:45,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2023-11-19 07:50:45,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:45,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:50:45,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:45,279 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:45,293 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 07:50:45,293 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:50:45,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2023-11-19 07:50:45,323 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-19 07:50:45,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:45,347 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:50:45,348 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:50:45,348 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:50:45,348 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:50:45,348 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-19 07:50:45,348 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:50:45,348 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:50:45,348 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:50:45,348 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration3_Loop [2023-11-19 07:50:45,348 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:50:45,349 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:50:45,350 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:50:45,360 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:50:45,364 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:50:45,366 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:50:45,370 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:50:45,422 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:50:45,424 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-19 07:50:45,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:50:45,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:45,425 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:45,433 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:50:45,445 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:50:45,446 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:50:45,446 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:50:45,446 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:50:45,446 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:50:45,448 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:50:45,448 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:50:45,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2023-11-19 07:50:45,459 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-19 07:50:45,462 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-19 07:50:45,463 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-19 07:50:45,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:50:45,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:45,465 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:45,471 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-19 07:50:45,471 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-19 07:50:45,471 INFO L513 LassoAnalysis]: Proved termination. [2023-11-19 07:50:45,472 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2023-11-19 07:50:45,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2023-11-19 07:50:45,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:45,496 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-19 07:50:45,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:45,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:50:45,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:45,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:45,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:50:45,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:45,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:45,742 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2023-11-19 07:50:45,742 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:50:45,986 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Result 135 states and 183 transitions. Complement of second has 36 states. [2023-11-19 07:50:45,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2023-11-19 07:50:45,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:50:45,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2023-11-19 07:50:45,989 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 10 letters. [2023-11-19 07:50:45,990 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:50:45,990 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 22 letters. Loop has 10 letters. [2023-11-19 07:50:45,990 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:50:45,990 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 20 letters. [2023-11-19 07:50:45,992 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:50:45,992 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2023-11-19 07:50:45,999 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2023-11-19 07:50:46,005 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 108 states and 152 transitions. [2023-11-19 07:50:46,005 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2023-11-19 07:50:46,006 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2023-11-19 07:50:46,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 152 transitions. [2023-11-19 07:50:46,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:50:46,007 INFO L218 hiAutomatonCegarLoop]: Abstraction has 108 states and 152 transitions. [2023-11-19 07:50:46,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 152 transitions. [2023-11-19 07:50:46,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2023-11-19 07:50:46,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 64 states have internal predecessors, (71), 21 states have call successors, (22), 11 states have call predecessors, (22), 15 states have return successors, (33), 18 states have call predecessors, (33), 19 states have call successors, (33) [2023-11-19 07:50:46,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2023-11-19 07:50:46,024 INFO L240 hiAutomatonCegarLoop]: Abstraction has 94 states and 126 transitions. [2023-11-19 07:50:46,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:46,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:50:46,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:50:46,025 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:50:46,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:46,182 INFO L93 Difference]: Finished difference Result 123 states and 165 transitions. [2023-11-19 07:50:46,182 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 123 states and 165 transitions. [2023-11-19 07:50:46,201 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2023-11-19 07:50:46,210 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 123 states to 118 states and 160 transitions. [2023-11-19 07:50:46,210 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2023-11-19 07:50:46,211 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2023-11-19 07:50:46,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 118 states and 160 transitions. [2023-11-19 07:50:46,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:50:46,212 INFO L218 hiAutomatonCegarLoop]: Abstraction has 118 states and 160 transitions. [2023-11-19 07:50:46,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states and 160 transitions. [2023-11-19 07:50:46,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 106. [2023-11-19 07:50:46,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 66 states have (on average 1.196969696969697) internal successors, (79), 72 states have internal predecessors, (79), 24 states have call successors, (25), 13 states have call predecessors, (25), 16 states have return successors, (37), 20 states have call predecessors, (37), 22 states have call successors, (37) [2023-11-19 07:50:46,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 141 transitions. [2023-11-19 07:50:46,241 INFO L240 hiAutomatonCegarLoop]: Abstraction has 106 states and 141 transitions. [2023-11-19 07:50:46,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:50:46,243 INFO L428 stractBuchiCegarLoop]: Abstraction has 106 states and 141 transitions. [2023-11-19 07:50:46,243 INFO L335 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2023-11-19 07:50:46,243 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 106 states and 141 transitions. [2023-11-19 07:50:46,245 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2023-11-19 07:50:46,249 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:50:46,249 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:50:46,252 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:46,252 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2023-11-19 07:50:46,252 INFO L748 eck$LassoCheckResult]: Stem: 808#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 809#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 9; 788#L29 call main_#t~ret6#1 := fibonacci(main_~x~0#1);< 810#$Ultimate##0 ~n := #in~n; 853#L17 assume !(~n < 1); 852#L19 assume !(1 == ~n); 798#L22 call #t~ret4 := fibonacci(~n - 1);< 802#$Ultimate##0 ~n := #in~n; 797#L17 assume !(~n < 1); 799#L19 assume !(1 == ~n); 819#L22 call #t~ret4 := fibonacci(~n - 1);< 845#$Ultimate##0 ~n := #in~n; 848#L17 assume !(~n < 1); 847#L19 assume !(1 == ~n); 840#L22 call #t~ret4 := fibonacci(~n - 1);< 845#$Ultimate##0 ~n := #in~n; 848#L17 assume !(~n < 1); 847#L19 assume !(1 == ~n); 840#L22 call #t~ret4 := fibonacci(~n - 1);< 845#$Ultimate##0 ~n := #in~n; 849#L17 assume !(~n < 1); 851#L19 assume 1 == ~n;#res := 1; 850#fibonacciFINAL assume true; 844#fibonacciEXIT >#31#return; 791#L22-1 call #t~ret5 := fibonacci(~n - 2);< 841#$Ultimate##0 ~n := #in~n; 891#L17 assume ~n < 1;#res := 0; 890#fibonacciFINAL assume true; 889#fibonacciEXIT >#33#return; 888#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 886#fibonacciFINAL assume true; 879#fibonacciEXIT >#31#return; 815#L22-1 [2023-11-19 07:50:46,253 INFO L750 eck$LassoCheckResult]: Loop: 815#L22-1 call #t~ret5 := fibonacci(~n - 2);< 801#$Ultimate##0 ~n := #in~n; 885#L17 assume !(~n < 1); 814#L19 assume !(1 == ~n); 817#L22 call #t~ret4 := fibonacci(~n - 1);< 801#$Ultimate##0 ~n := #in~n; 885#L17 assume !(~n < 1); 814#L19 assume !(1 == ~n); 817#L22 call #t~ret4 := fibonacci(~n - 1);< 801#$Ultimate##0 ~n := #in~n; 885#L17 assume !(~n < 1); 814#L19 assume 1 == ~n;#res := 1; 818#fibonacciFINAL assume true; 875#fibonacciEXIT >#31#return; 815#L22-1 call #t~ret5 := fibonacci(~n - 2);< 801#$Ultimate##0 ~n := #in~n; 885#L17 assume !(~n < 1); 814#L19 assume !(1 == ~n); 817#L22 call #t~ret4 := fibonacci(~n - 1);< 801#$Ultimate##0 ~n := #in~n; 885#L17 assume !(~n < 1); 814#L19 assume 1 == ~n;#res := 1; 818#fibonacciFINAL assume true; 875#fibonacciEXIT >#31#return; 815#L22-1 call #t~ret5 := fibonacci(~n - 2);< 801#$Ultimate##0 ~n := #in~n; 885#L17 assume ~n < 1;#res := 0; 884#fibonacciFINAL assume true; 883#fibonacciEXIT >#33#return; 876#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 882#fibonacciFINAL assume true; 880#fibonacciEXIT >#33#return; 876#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 882#fibonacciFINAL assume true; 880#fibonacciEXIT >#31#return; 815#L22-1 [2023-11-19 07:50:46,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:46,253 INFO L85 PathProgramCache]: Analyzing trace with hash 3324437, now seen corresponding path program 1 times [2023-11-19 07:50:46,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:46,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677492363] [2023-11-19 07:50:46,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:46,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:46,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:46,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-19 07:50:46,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:46,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:50:46,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:46,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-19 07:50:46,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:46,525 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 07:50:46,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:46,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677492363] [2023-11-19 07:50:46,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677492363] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:46,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801070321] [2023-11-19 07:50:46,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:46,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:46,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:46,528 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:46,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-19 07:50:46,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:46,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:50:46,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:46,644 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 07:50:46,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:46,928 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:50:46,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801070321] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:46,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:46,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 22 [2023-11-19 07:50:46,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180567314] [2023-11-19 07:50:46,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:46,930 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-11-19 07:50:46,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:46,930 INFO L85 PathProgramCache]: Analyzing trace with hash -929430729, now seen corresponding path program 1 times [2023-11-19 07:50:46,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:46,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511386075] [2023-11-19 07:50:46,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:46,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:46,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:46,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:50:47,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:47,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:50:47,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:47,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-19 07:50:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:47,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:50:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:47,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-19 07:50:47,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:47,127 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-19 07:50:47,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:47,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511386075] [2023-11-19 07:50:47,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511386075] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:47,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608924739] [2023-11-19 07:50:47,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:47,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:47,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:47,130 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:47,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-19 07:50:47,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:47,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:50:47,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:47,230 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-19 07:50:47,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:47,411 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-19 07:50:47,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608924739] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:47,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:47,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-19 07:50:47,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503002138] [2023-11-19 07:50:47,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:47,415 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-11-19 07:50:47,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:47,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-19 07:50:47,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2023-11-19 07:50:47,419 INFO L87 Difference]: Start difference. First operand 106 states and 141 transitions. cyclomatic complexity: 40 Second operand has 23 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 15 states have internal predecessors, (41), 13 states have call successors, (13), 7 states have call predecessors, (13), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-19 07:50:47,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:47,838 INFO L93 Difference]: Finished difference Result 174 states and 225 transitions. [2023-11-19 07:50:47,838 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 174 states and 225 transitions. [2023-11-19 07:50:47,846 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2023-11-19 07:50:47,860 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 174 states to 163 states and 214 transitions. [2023-11-19 07:50:47,860 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 110 [2023-11-19 07:50:47,862 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 110 [2023-11-19 07:50:47,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 163 states and 214 transitions. [2023-11-19 07:50:47,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:50:47,869 INFO L218 hiAutomatonCegarLoop]: Abstraction has 163 states and 214 transitions. [2023-11-19 07:50:47,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states and 214 transitions. [2023-11-19 07:50:47,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2023-11-19 07:50:47,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 102 states have (on average 1.1470588235294117) internal successors, (117), 108 states have internal predecessors, (117), 39 states have call successors, (40), 21 states have call predecessors, (40), 22 states have return successors, (57), 33 states have call predecessors, (57), 36 states have call successors, (57) [2023-11-19 07:50:47,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 214 transitions. [2023-11-19 07:50:47,901 INFO L240 hiAutomatonCegarLoop]: Abstraction has 163 states and 214 transitions. [2023-11-19 07:50:47,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 07:50:47,903 INFO L428 stractBuchiCegarLoop]: Abstraction has 163 states and 214 transitions. [2023-11-19 07:50:47,903 INFO L335 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2023-11-19 07:50:47,903 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 163 states and 214 transitions. [2023-11-19 07:50:47,905 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2023-11-19 07:50:47,906 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 07:50:47,906 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 07:50:47,908 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [10, 9, 8, 8, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:47,908 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2023-11-19 07:50:47,908 INFO L748 eck$LassoCheckResult]: Stem: 1620#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 1621#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 9; 1601#L29 call main_#t~ret6#1 := fibonacci(main_~x~0#1);< 1622#$Ultimate##0 ~n := #in~n; 1610#L17 assume !(~n < 1); 1611#L19 assume !(1 == ~n); 1614#L22 call #t~ret4 := fibonacci(~n - 1);< 1615#$Ultimate##0 ~n := #in~n; 1635#L17 assume !(~n < 1); 1678#L19 assume !(1 == ~n); 1674#L22 call #t~ret4 := fibonacci(~n - 1);< 1677#$Ultimate##0 ~n := #in~n; 1676#L17 assume !(~n < 1); 1675#L19 assume !(1 == ~n); 1670#L22 call #t~ret4 := fibonacci(~n - 1);< 1673#$Ultimate##0 ~n := #in~n; 1672#L17 assume !(~n < 1); 1671#L19 assume !(1 == ~n); 1666#L22 call #t~ret4 := fibonacci(~n - 1);< 1669#$Ultimate##0 ~n := #in~n; 1668#L17 assume !(~n < 1); 1667#L19 assume !(1 == ~n); 1662#L22 call #t~ret4 := fibonacci(~n - 1);< 1665#$Ultimate##0 ~n := #in~n; 1664#L17 assume !(~n < 1); 1663#L19 assume !(1 == ~n); 1652#L22 call #t~ret4 := fibonacci(~n - 1);< 1656#$Ultimate##0 ~n := #in~n; 1660#L17 assume !(~n < 1); 1658#L19 assume !(1 == ~n); 1653#L22 call #t~ret4 := fibonacci(~n - 1);< 1656#$Ultimate##0 ~n := #in~n; 1660#L17 assume !(~n < 1); 1658#L19 assume !(1 == ~n); 1653#L22 call #t~ret4 := fibonacci(~n - 1);< 1656#$Ultimate##0 ~n := #in~n; 1661#L17 assume !(~n < 1); 1659#L19 assume 1 == ~n;#res := 1; 1657#fibonacciFINAL assume true; 1655#fibonacciEXIT >#31#return; 1604#L22-1 call #t~ret5 := fibonacci(~n - 2);< 1654#$Ultimate##0 ~n := #in~n; 1741#L17 assume ~n < 1;#res := 0; 1740#fibonacciFINAL assume true; 1737#fibonacciEXIT >#33#return; 1736#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1735#fibonacciFINAL assume true; 1719#fibonacciEXIT >#31#return; 1707#L22-1 [2023-11-19 07:50:47,909 INFO L750 eck$LassoCheckResult]: Loop: 1707#L22-1 call #t~ret5 := fibonacci(~n - 2);< 1727#$Ultimate##0 ~n := #in~n; 1747#L17 assume !(~n < 1); 1746#L19 assume !(1 == ~n); 1711#L22 call #t~ret4 := fibonacci(~n - 1);< 1727#$Ultimate##0 ~n := #in~n; 1747#L17 assume !(~n < 1); 1746#L19 assume !(1 == ~n); 1711#L22 call #t~ret4 := fibonacci(~n - 1);< 1727#$Ultimate##0 ~n := #in~n; 1747#L17 assume !(~n < 1); 1746#L19 assume 1 == ~n;#res := 1; 1743#fibonacciFINAL assume true; 1704#fibonacciEXIT >#31#return; 1710#L22-1 call #t~ret5 := fibonacci(~n - 2);< 1729#$Ultimate##0 ~n := #in~n; 1744#L17 assume ~n < 1;#res := 0; 1745#fibonacciFINAL assume true; 1752#fibonacciEXIT >#33#return; 1713#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1749#fibonacciFINAL assume true; 1720#fibonacciEXIT >#31#return; 1707#L22-1 [2023-11-19 07:50:47,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:47,909 INFO L85 PathProgramCache]: Analyzing trace with hash -407339347, now seen corresponding path program 2 times [2023-11-19 07:50:47,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:47,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778876163] [2023-11-19 07:50:47,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:47,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:47,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:50:47,923 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:50:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:50:47,937 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:50:47,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:47,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1749360471, now seen corresponding path program 2 times [2023-11-19 07:50:47,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:47,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796119900] [2023-11-19 07:50:47,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:47,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:47,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:50:47,944 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:50:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:50:47,949 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:50:47,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:47,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1472997803, now seen corresponding path program 3 times [2023-11-19 07:50:47,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:47,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894513192] [2023-11-19 07:50:47,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:47,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:47,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:48,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-19 07:50:48,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:48,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:50:48,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:48,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-19 07:50:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:48,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-19 07:50:48,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:48,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:50:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:48,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-19 07:50:48,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:48,299 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 122 proven. 136 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-19 07:50:48,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:48,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894513192] [2023-11-19 07:50:48,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894513192] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:48,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30615736] [2023-11-19 07:50:48,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:50:48,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:48,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:48,303 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:48,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-19 07:50:48,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-11-19 07:50:48,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:50:48,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:50:48,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:48,523 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 113 proven. 47 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2023-11-19 07:50:48,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 113 proven. 49 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-11-19 07:50:48,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30615736] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:48,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:48,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 12] total 31 [2023-11-19 07:50:48,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651355203] [2023-11-19 07:50:48,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:49,227 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:50:49,227 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:50:49,228 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:50:49,228 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:50:49,228 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-11-19 07:50:49,228 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:50:49,228 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:50:49,228 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:50:49,229 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration5_Loop [2023-11-19 07:50:49,229 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:50:49,229 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:50:49,230 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:50:49,234 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:50:49,237 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:50:49,241 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:50:49,244 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:50:49,289 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:50:49,289 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-11-19 07:50:49,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:50:49,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:49,293 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:49,300 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:50:49,301 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:50:49,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2023-11-19 07:50:49,323 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:50:49,323 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret4=1} Honda state: {fibonacci_#t~ret4=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:50:49,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:49,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:50:49,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:49,346 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:49,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2023-11-19 07:50:49,348 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:50:49,348 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:50:49,361 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:50:49,361 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#in~n=3} Honda state: {fibonacci_#in~n=3} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:50:49,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:49,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:50:49,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:49,379 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:49,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2023-11-19 07:50:49,381 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:50:49,381 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:50:49,393 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:50:49,394 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:50:49,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:49,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:50:49,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:49,409 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:49,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2023-11-19 07:50:49,410 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:50:49,410 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:50:49,422 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-11-19 07:50:49,423 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret5=0} Honda state: {fibonacci_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-11-19 07:50:49,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:49,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:50:49,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:49,438 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:49,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2023-11-19 07:50:49,441 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-11-19 07:50:49,441 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:50:49,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:49,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:50:49,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:49,468 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:49,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2023-11-19 07:50:49,470 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-11-19 07:50:49,470 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-11-19 07:50:49,503 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-11-19 07:50:49,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:49,527 INFO L210 LassoAnalysis]: Preferences: [2023-11-19 07:50:49,527 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-11-19 07:50:49,528 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-11-19 07:50:49,528 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-11-19 07:50:49,528 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-11-19 07:50:49,528 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:50:49,528 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-11-19 07:50:49,528 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-11-19 07:50:49,528 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration5_Loop [2023-11-19 07:50:49,528 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-11-19 07:50:49,528 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-11-19 07:50:49,529 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:50:49,533 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:50:49,536 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:50:49,538 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:50:49,543 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-11-19 07:50:49,587 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-11-19 07:50:49,587 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-11-19 07:50:49,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:50:49,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:49,588 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:49,597 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:50:49,610 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:50:49,610 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:50:49,610 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:50:49,610 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:50:49,610 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:50:49,611 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:50:49,612 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:50:49,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2023-11-19 07:50:49,639 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:50:49,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:49,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:50:49,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:49,664 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:49,668 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:50:49,681 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:50:49,681 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:50:49,681 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:50:49,681 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:50:49,681 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:50:49,682 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:50:49,682 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:50:49,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2023-11-19 07:50:49,695 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:50:49,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:49,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:50:49,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:49,716 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:49,720 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:50:49,732 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:50:49,732 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:50:49,732 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:50:49,732 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:50:49,733 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:50:49,733 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:50:49,733 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:50:49,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2023-11-19 07:50:49,747 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-11-19 07:50:49,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:49,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:50:49,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:49,772 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:49,775 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-11-19 07:50:49,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2023-11-19 07:50:49,787 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-11-19 07:50:49,788 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-11-19 07:50:49,788 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-11-19 07:50:49,788 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-11-19 07:50:49,788 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-11-19 07:50:49,789 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-11-19 07:50:49,789 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-11-19 07:50:49,798 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-11-19 07:50:49,802 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-11-19 07:50:49,802 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-11-19 07:50:49,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 07:50:49,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:49,804 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:49,806 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-11-19 07:50:49,806 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-11-19 07:50:49,806 INFO L513 LassoAnalysis]: Proved termination. [2023-11-19 07:50:49,806 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2023-11-19 07:50:49,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2023-11-19 07:50:49,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Ended with exit code 0 [2023-11-19 07:50:49,826 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-11-19 07:50:49,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:49,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:49,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-19 07:50:49,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:50,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:50,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 07:50:50,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:50,357 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:50:50,358 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2023-11-19 07:50:50,359 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 163 states and 214 transitions. cyclomatic complexity: 57 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 07:50:50,652 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 163 states and 214 transitions. cyclomatic complexity: 57. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 296 states and 402 transitions. Complement of second has 45 states. [2023-11-19 07:50:50,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2023-11-19 07:50:50,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 07:50:50,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 41 transitions. [2023-11-19 07:50:50,661 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 48 letters. Loop has 22 letters. [2023-11-19 07:50:50,662 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:50:50,662 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-19 07:50:50,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:50,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:50,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:50,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-19 07:50:50,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:50,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:50,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 07:50:51,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:51,164 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:50:51,165 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 7 loop predicates [2023-11-19 07:50:51,166 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 163 states and 214 transitions. cyclomatic complexity: 57 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 07:50:51,336 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 163 states and 214 transitions. cyclomatic complexity: 57. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 357 states and 475 transitions. Complement of second has 25 states. [2023-11-19 07:50:51,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2023-11-19 07:50:51,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 07:50:51,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2023-11-19 07:50:51,342 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 48 letters. Loop has 22 letters. [2023-11-19 07:50:51,343 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:50:51,343 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-11-19 07:50:51,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:51,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:51,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-19 07:50:51,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:51,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:51,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 07:50:51,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:51,803 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:50:51,804 INFO L141 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2023-11-19 07:50:51,804 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 163 states and 214 transitions. cyclomatic complexity: 57 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 07:50:52,139 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 163 states and 214 transitions. cyclomatic complexity: 57. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 1307 states and 1827 transitions. Complement of second has 138 states. [2023-11-19 07:50:52,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2023-11-19 07:50:52,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 07:50:52,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 46 transitions. [2023-11-19 07:50:52,141 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 48 letters. Loop has 22 letters. [2023-11-19 07:50:52,143 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:50:52,144 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 70 letters. Loop has 22 letters. [2023-11-19 07:50:52,145 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:50:52,145 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 48 letters. Loop has 44 letters. [2023-11-19 07:50:52,148 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-11-19 07:50:52,148 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1307 states and 1827 transitions. [2023-11-19 07:50:52,175 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 58 [2023-11-19 07:50:52,195 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1307 states to 789 states and 1177 transitions. [2023-11-19 07:50:52,195 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 305 [2023-11-19 07:50:52,196 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 344 [2023-11-19 07:50:52,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 789 states and 1177 transitions. [2023-11-19 07:50:52,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-11-19 07:50:52,197 INFO L218 hiAutomatonCegarLoop]: Abstraction has 789 states and 1177 transitions. [2023-11-19 07:50:52,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states and 1177 transitions. [2023-11-19 07:50:52,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 637. [2023-11-19 07:50:52,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 388 states have (on average 1.1623711340206186) internal successors, (451), 413 states have internal predecessors, (451), 153 states have call successors, (167), 77 states have call predecessors, (167), 96 states have return successors, (281), 146 states have call predecessors, (281), 142 states have call successors, (281) [2023-11-19 07:50:52,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 899 transitions. [2023-11-19 07:50:52,248 INFO L240 hiAutomatonCegarLoop]: Abstraction has 637 states and 899 transitions. [2023-11-19 07:50:52,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:52,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-19 07:50:52,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2023-11-19 07:50:52,250 INFO L87 Difference]: Start difference. First operand 637 states and 899 transitions. Second operand has 31 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 24 states have internal predecessors, (66), 17 states have call successors, (23), 10 states have call predecessors, (23), 6 states have return successors, (15), 9 states have call predecessors, (15), 10 states have call successors, (15) [2023-11-19 07:50:53,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:53,172 INFO L93 Difference]: Finished difference Result 533 states and 626 transitions. [2023-11-19 07:50:53,172 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 533 states and 626 transitions. [2023-11-19 07:50:53,180 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-11-19 07:50:53,181 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 533 states to 0 states and 0 transitions. [2023-11-19 07:50:53,181 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2023-11-19 07:50:53,181 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2023-11-19 07:50:53,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2023-11-19 07:50:53,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:53,181 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-19 07:50:53,181 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-19 07:50:53,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-19 07:50:53,182 INFO L428 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-19 07:50:53,182 INFO L335 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2023-11-19 07:50:53,183 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2023-11-19 07:50:53,183 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-11-19 07:50:53,183 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2023-11-19 07:50:53,200 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.11 07:50:53 BoogieIcfgContainer [2023-11-19 07:50:53,200 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2023-11-19 07:50:53,200 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-19 07:50:53,201 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-19 07:50:53,201 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-19 07:50:53,201 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:50:42" (3/4) ... [2023-11-19 07:50:53,203 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-19 07:50:53,205 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-19 07:50:53,205 INFO L158 Benchmark]: Toolchain (without parser) took 11606.61ms. Allocated memory was 125.8MB in the beginning and 199.2MB in the end (delta: 73.4MB). Free memory was 79.7MB in the beginning and 78.9MB in the end (delta: 749.9kB). Peak memory consumption was 76.0MB. Max. memory is 16.1GB. [2023-11-19 07:50:53,206 INFO L158 Benchmark]: CDTParser took 0.73ms. Allocated memory is still 125.8MB. Free memory was 95.6MB in the beginning and 95.5MB in the end (delta: 81.7kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:50:53,207 INFO L158 Benchmark]: CACSL2BoogieTranslator took 294.94ms. Allocated memory is still 125.8MB. Free memory was 79.4MB in the beginning and 69.6MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-19 07:50:53,207 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.06ms. Allocated memory is still 125.8MB. Free memory was 69.6MB in the beginning and 68.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 07:50:53,207 INFO L158 Benchmark]: Boogie Preprocessor took 41.52ms. Allocated memory is still 125.8MB. Free memory was 68.0MB in the beginning and 67.3MB in the end (delta: 685.7kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:50:53,208 INFO L158 Benchmark]: RCFGBuilder took 287.85ms. Allocated memory is still 125.8MB. Free memory was 67.0MB in the beginning and 58.1MB in the end (delta: 8.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-19 07:50:53,208 INFO L158 Benchmark]: BuchiAutomizer took 10924.71ms. Allocated memory was 125.8MB in the beginning and 199.2MB in the end (delta: 73.4MB). Free memory was 57.8MB in the beginning and 78.9MB in the end (delta: -21.1MB). Peak memory consumption was 52.9MB. Max. memory is 16.1GB. [2023-11-19 07:50:53,208 INFO L158 Benchmark]: Witness Printer took 4.51ms. Allocated memory is still 199.2MB. Free memory is still 78.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:50:53,211 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.73ms. Allocated memory is still 125.8MB. Free memory was 95.6MB in the beginning and 95.5MB in the end (delta: 81.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 294.94ms. Allocated memory is still 125.8MB. Free memory was 79.4MB in the beginning and 69.6MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.06ms. Allocated memory is still 125.8MB. Free memory was 69.6MB in the beginning and 68.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 41.52ms. Allocated memory is still 125.8MB. Free memory was 68.0MB in the beginning and 67.3MB in the end (delta: 685.7kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 287.85ms. Allocated memory is still 125.8MB. Free memory was 67.0MB in the beginning and 58.1MB in the end (delta: 8.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * BuchiAutomizer took 10924.71ms. Allocated memory was 125.8MB in the beginning and 199.2MB in the end (delta: 73.4MB). Free memory was 57.8MB in the beginning and 78.9MB in the end (delta: -21.1MB). Peak memory consumption was 52.9MB. Max. memory is 16.1GB. * Witness Printer took 4.51ms. Allocated memory is still 199.2MB. Free memory is still 78.9MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 7 terminating modules (4 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 9 locations. One nondeterministic module has affine ranking function n and consists of 10 locations. 4 modules have a trivial ranking function, the largest among these consists of 31 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 10.8s and 6 iterations. TraceHistogramMax:10. Analysis of lassos took 5.6s. Construction of modules took 1.0s. Büchi inclusion checks took 3.8s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 6. Automata minimization 0.2s AutomataMinimizationTime, 6 MinimizatonAttempts, 183 StatesRemovedByMinimization, 4 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 8/26 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 583 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 567 mSDsluCounter, 442 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 296 mSDsCounter, 396 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1125 IncrementalHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 396 mSolverCounterUnsat, 146 mSDtfsCounter, 1125 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT1 SILN0 SILU0 SILI2 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital14 mio100 ax100 hnf100 lsp71 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq190 hnf90 smp88 dnf100 smp100 tf113 neg100 sie103 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 42ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 7 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.4s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2023-11-19 07:50:53,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:53,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-19 07:50:53,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-19 07:50:53,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-19 07:50:54,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee81d80-2853-4b49-bf13-109bf6c6090c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE