./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_2-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032a1656-6b14-49db-ab09-f3c25d378923/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032a1656-6b14-49db-ab09-f3c25d378923/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032a1656-6b14-49db-ab09-f3c25d378923/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032a1656-6b14-49db-ab09-f3c25d378923/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_2-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032a1656-6b14-49db-ab09-f3c25d378923/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032a1656-6b14-49db-ab09-f3c25d378923/bin/uautomizer-ZXIjhQolGL --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2c47a69833f1a958e38c27482b535b2d176258e52297f9899a8926a996c05520 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:52:12,583 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:52:12,586 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:52:12,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:52:12,644 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:52:12,651 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:52:12,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:52:12,657 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:52:12,659 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:52:12,661 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:52:12,663 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:52:12,665 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:52:12,665 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:52:12,667 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:52:12,669 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:52:12,671 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:52:12,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:52:12,680 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:52:12,683 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:52:12,686 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:52:12,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:52:12,697 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:52:12,699 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:52:12,705 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:52:12,710 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:52:12,714 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:52:12,714 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:52:12,716 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:52:12,718 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:52:12,720 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:52:12,721 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:52:12,723 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:52:12,725 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:52:12,727 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:52:12,729 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:52:12,729 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:52:12,730 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:52:12,731 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:52:12,731 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:52:12,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:52:12,733 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:52:12,734 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032a1656-6b14-49db-ab09-f3c25d378923/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 04:52:12,792 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:52:12,793 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:52:12,793 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:52:12,794 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:52:12,794 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:52:12,795 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:52:12,796 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:52:12,796 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:52:12,796 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:52:12,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:52:12,797 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:52:12,797 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:52:12,797 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:52:12,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:52:12,798 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 04:52:12,798 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:52:12,799 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 04:52:12,799 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:52:12,799 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 04:52:12,800 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:52:12,800 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 04:52:12,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:52:12,800 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:52:12,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:52:12,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:52:12,801 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:52:12,802 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:52:12,802 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 04:52:12,802 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:52:12,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:52:12,803 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 04:52:12,803 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 04:52:12,803 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 04:52:12,804 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:52:12,804 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_032a1656-6b14-49db-ab09-f3c25d378923/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032a1656-6b14-49db-ab09-f3c25d378923/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2c47a69833f1a958e38c27482b535b2d176258e52297f9899a8926a996c05520 [2021-11-19 04:52:13,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:52:13,147 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:52:13,151 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:52:13,152 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:52:13,153 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:52:13,155 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032a1656-6b14-49db-ab09-f3c25d378923/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/recursive-simple/fibo_2calls_2-1.c [2021-11-19 04:52:13,241 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032a1656-6b14-49db-ab09-f3c25d378923/bin/uautomizer-ZXIjhQolGL/data/1f202762f/cbe9341e932d45798000ad10d0d3d55c/FLAGdc4d96862 [2021-11-19 04:52:13,834 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:52:13,835 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032a1656-6b14-49db-ab09-f3c25d378923/sv-benchmarks/c/recursive-simple/fibo_2calls_2-1.c [2021-11-19 04:52:13,848 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032a1656-6b14-49db-ab09-f3c25d378923/bin/uautomizer-ZXIjhQolGL/data/1f202762f/cbe9341e932d45798000ad10d0d3d55c/FLAGdc4d96862 [2021-11-19 04:52:14,160 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032a1656-6b14-49db-ab09-f3c25d378923/bin/uautomizer-ZXIjhQolGL/data/1f202762f/cbe9341e932d45798000ad10d0d3d55c [2021-11-19 04:52:14,163 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:52:14,165 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 04:52:14,167 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:52:14,167 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:52:14,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:52:14,172 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:52:14" (1/1) ... [2021-11-19 04:52:14,173 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44bcff97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:14, skipping insertion in model container [2021-11-19 04:52:14,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:52:14" (1/1) ... [2021-11-19 04:52:14,191 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:52:14,211 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:52:14,463 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032a1656-6b14-49db-ab09-f3c25d378923/sv-benchmarks/c/recursive-simple/fibo_2calls_2-1.c[946,959] [2021-11-19 04:52:14,467 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:52:14,477 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:52:14,495 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032a1656-6b14-49db-ab09-f3c25d378923/sv-benchmarks/c/recursive-simple/fibo_2calls_2-1.c[946,959] [2021-11-19 04:52:14,496 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:52:14,513 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:52:14,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:14 WrapperNode [2021-11-19 04:52:14,514 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:52:14,516 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 04:52:14,516 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 04:52:14,516 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 04:52:14,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:14" (1/1) ... [2021-11-19 04:52:14,532 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:14" (1/1) ... [2021-11-19 04:52:14,554 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2021-11-19 04:52:14,554 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 04:52:14,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:52:14,556 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:52:14,556 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:52:14,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:14" (1/1) ... [2021-11-19 04:52:14,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:14" (1/1) ... [2021-11-19 04:52:14,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:14" (1/1) ... [2021-11-19 04:52:14,569 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:14" (1/1) ... [2021-11-19 04:52:14,573 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:14" (1/1) ... [2021-11-19 04:52:14,576 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:14" (1/1) ... [2021-11-19 04:52:14,577 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:14" (1/1) ... [2021-11-19 04:52:14,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:52:14,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:52:14,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:52:14,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:52:14,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:14" (1/1) ... [2021-11-19 04:52:14,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:52:14,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032a1656-6b14-49db-ab09-f3c25d378923/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:52:14,629 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032a1656-6b14-49db-ab09-f3c25d378923/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:52:14,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032a1656-6b14-49db-ab09-f3c25d378923/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:52:14,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:52:14,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:52:14,685 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2021-11-19 04:52:14,685 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2021-11-19 04:52:14,686 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2021-11-19 04:52:14,686 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2021-11-19 04:52:14,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:52:14,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:52:14,761 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:52:14,763 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:52:14,892 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:52:14,900 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:52:14,901 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 04:52:14,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:52:14 BoogieIcfgContainer [2021-11-19 04:52:14,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:52:14,906 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:52:14,906 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:52:14,911 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:52:14,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:52:14" (1/3) ... [2021-11-19 04:52:14,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2298d21c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:52:14, skipping insertion in model container [2021-11-19 04:52:14,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:14" (2/3) ... [2021-11-19 04:52:14,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2298d21c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:52:14, skipping insertion in model container [2021-11-19 04:52:14,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:52:14" (3/3) ... [2021-11-19 04:52:14,916 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-1.c [2021-11-19 04:52:14,923 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:52:14,923 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 04:52:14,987 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:52:14,997 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 04:52:14,997 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 04:52:15,020 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-19 04:52:15,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-19 04:52:15,027 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:15,028 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:15,029 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:15,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:15,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2021-11-19 04:52:15,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:15,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366924252] [2021-11-19 04:52:15,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:15,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:15,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:15,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:52:15,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:15,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:52:15,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:15,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366924252] [2021-11-19 04:52:15,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366924252] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:15,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:15,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:52:15,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727734044] [2021-11-19 04:52:15,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:15,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:52:15,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:15,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:52:15,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:52:15,404 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:52:15,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:15,504 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-11-19 04:52:15,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:52:15,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-19 04:52:15,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:15,517 INFO L225 Difference]: With dead ends: 39 [2021-11-19 04:52:15,517 INFO L226 Difference]: Without dead ends: 27 [2021-11-19 04:52:15,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:52:15,526 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 15 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:15,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 89 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:52:15,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-19 04:52:15,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-19 04:52:15,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-19 04:52:15,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-11-19 04:52:15,606 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2021-11-19 04:52:15,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:15,607 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-11-19 04:52:15,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:52:15,608 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-11-19 04:52:15,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-19 04:52:15,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:15,611 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:15,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:52:15,614 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:15,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:15,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2021-11-19 04:52:15,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:15,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6299769] [2021-11-19 04:52:15,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:15,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:15,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:15,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:52:15,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:15,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:52:15,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:15,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6299769] [2021-11-19 04:52:15,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6299769] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:15,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:15,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:52:15,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008581418] [2021-11-19 04:52:15,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:15,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:52:15,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:15,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:52:15,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:52:15,782 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:52:15,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:15,876 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2021-11-19 04:52:15,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:52:15,878 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-19 04:52:15,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:15,882 INFO L225 Difference]: With dead ends: 33 [2021-11-19 04:52:15,882 INFO L226 Difference]: Without dead ends: 29 [2021-11-19 04:52:15,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:52:15,888 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:15,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 77 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:52:15,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-19 04:52:15,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-11-19 04:52:15,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-19 04:52:15,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-11-19 04:52:15,915 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2021-11-19 04:52:15,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:15,916 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-11-19 04:52:15,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:52:15,919 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-11-19 04:52:15,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-19 04:52:15,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:15,922 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:15,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 04:52:15,924 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:15,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:15,926 INFO L85 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2021-11-19 04:52:15,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:15,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59207701] [2021-11-19 04:52:15,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:15,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:15,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:16,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:52:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:16,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:16,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:16,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:52:16,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:16,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:52:16,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:16,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59207701] [2021-11-19 04:52:16,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59207701] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:52:16,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862621467] [2021-11-19 04:52:16,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:16,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:16,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032a1656-6b14-49db-ab09-f3c25d378923/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:52:16,180 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032a1656-6b14-49db-ab09-f3c25d378923/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:52:16,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032a1656-6b14-49db-ab09-f3c25d378923/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 04:52:16,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:16,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 04:52:16,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:52:16,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:52:16,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:52:16,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:52:16,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862621467] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:52:16,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:52:16,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-11-19 04:52:16,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235115662] [2021-11-19 04:52:16,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:52:16,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 04:52:16,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:16,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 04:52:16,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:52:16,886 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 13 states, 10 states have (on average 3.1) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-19 04:52:17,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:17,063 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2021-11-19 04:52:17,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 04:52:17,064 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.1) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 7 states have call successors, (7) Word has length 23 [2021-11-19 04:52:17,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:17,066 INFO L225 Difference]: With dead ends: 55 [2021-11-19 04:52:17,066 INFO L226 Difference]: Without dead ends: 31 [2021-11-19 04:52:17,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-11-19 04:52:17,069 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 34 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:17,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 121 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:52:17,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-19 04:52:17,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-11-19 04:52:17,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-19 04:52:17,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-11-19 04:52:17,078 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2021-11-19 04:52:17,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:17,079 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-11-19 04:52:17,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.1) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-19 04:52:17,080 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-11-19 04:52:17,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 04:52:17,081 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:17,082 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:17,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032a1656-6b14-49db-ab09-f3c25d378923/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 04:52:17,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032a1656-6b14-49db-ab09-f3c25d378923/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:17,296 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:17,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:17,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2021-11-19 04:52:17,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:17,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286395298] [2021-11-19 04:52:17,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:17,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:17,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 04:52:17,318 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 04:52:17,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 04:52:17,350 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-19 04:52:17,350 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-19 04:52:17,351 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-19 04:52:17,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 04:52:17,357 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-11-19 04:52:17,362 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-19 04:52:17,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 04:52:17 BoogieIcfgContainer [2021-11-19 04:52:17,407 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-19 04:52:17,408 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-19 04:52:17,408 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-19 04:52:17,408 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-19 04:52:17,409 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:52:14" (3/4) ... [2021-11-19 04:52:17,411 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-19 04:52:17,462 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032a1656-6b14-49db-ab09-f3c25d378923/bin/uautomizer-ZXIjhQolGL/witness.graphml [2021-11-19 04:52:17,462 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-19 04:52:17,463 INFO L158 Benchmark]: Toolchain (without parser) took 3298.06ms. Allocated memory was 81.8MB in the beginning and 119.5MB in the end (delta: 37.7MB). Free memory was 44.5MB in the beginning and 64.6MB in the end (delta: -20.0MB). Peak memory consumption was 14.8MB. Max. memory is 16.1GB. [2021-11-19 04:52:17,464 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 81.8MB. Free memory is still 60.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 04:52:17,464 INFO L158 Benchmark]: CACSL2BoogieTranslator took 347.86ms. Allocated memory was 81.8MB in the beginning and 119.5MB in the end (delta: 37.7MB). Free memory was 44.4MB in the beginning and 96.7MB in the end (delta: -52.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-19 04:52:17,465 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.88ms. Allocated memory is still 119.5MB. Free memory was 96.7MB in the beginning and 95.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 04:52:17,465 INFO L158 Benchmark]: Boogie Preprocessor took 24.40ms. Allocated memory is still 119.5MB. Free memory was 95.4MB in the beginning and 94.5MB in the end (delta: 857.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 04:52:17,465 INFO L158 Benchmark]: RCFGBuilder took 322.65ms. Allocated memory is still 119.5MB. Free memory was 94.2MB in the beginning and 85.1MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-19 04:52:17,466 INFO L158 Benchmark]: TraceAbstraction took 2501.32ms. Allocated memory is still 119.5MB. Free memory was 84.7MB in the beginning and 66.6MB in the end (delta: 18.1MB). Peak memory consumption was 17.2MB. Max. memory is 16.1GB. [2021-11-19 04:52:17,466 INFO L158 Benchmark]: Witness Printer took 54.45ms. Allocated memory is still 119.5MB. Free memory was 66.6MB in the beginning and 64.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 04:52:17,469 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 81.8MB. Free memory is still 60.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 347.86ms. Allocated memory was 81.8MB in the beginning and 119.5MB in the end (delta: 37.7MB). Free memory was 44.4MB in the beginning and 96.7MB in the end (delta: -52.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.88ms. Allocated memory is still 119.5MB. Free memory was 96.7MB in the beginning and 95.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.40ms. Allocated memory is still 119.5MB. Free memory was 95.4MB in the beginning and 94.5MB in the end (delta: 857.7kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 322.65ms. Allocated memory is still 119.5MB. Free memory was 94.2MB in the beginning and 85.1MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 2501.32ms. Allocated memory is still 119.5MB. Free memory was 84.7MB in the beginning and 66.6MB in the end (delta: 18.1MB). Peak memory consumption was 17.2MB. Max. memory is 16.1GB. * Witness Printer took 54.45ms. Allocated memory is still 119.5MB. Free memory was 66.6MB in the beginning and 64.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 41]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L38] int x = 2; VAL [x=2] [L39] CALL, EXPR fibo1(x) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L39] RET, EXPR fibo1(x) VAL [fibo1(x)=1, x=2] [L39] int result = fibo1(x); [L40] COND TRUE result == 1 VAL [result=1, x=2] [L41] reach_error() VAL [result=1, x=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.4s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 70 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 59 mSDsluCounter, 287 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 215 mSDsCounter, 16 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 191 IncrementalHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 16 mSolverCounterUnsat, 72 mSDtfsCounter, 191 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=0, InterpolantAutomatonStates: 20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 91 NumberOfCodeBlocks, 91 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 85 ConstructedInterpolants, 0 QuantifiedInterpolants, 179 SizeOfPredicates, 2 NumberOfNonLiveVariables, 75 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 3/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-19 04:52:17,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_032a1656-6b14-49db-ab09-f3c25d378923/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE