./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_5e1947d0-e711-4905-a03e-9610cc23064a/bin/ukojak/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_5e1947d0-e711-4905-a03e-9610cc23064a/bin/ukojak/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5e1947d0-e711-4905-a03e-9610cc23064a/bin/ukojak/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5e1947d0-e711-4905-a03e-9610cc23064a/bin/ukojak/config/KojakReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_5e1947d0-e711-4905-a03e-9610cc23064a/bin/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5e1947d0-e711-4905-a03e-9610cc23064a/bin/ukojak --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 Kojak --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 23bbff91fb2bcbd238fb97db06c7d4983c05a850 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 04:41:05,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 04:41:05,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 04:41:05,356 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 04:41:05,357 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 04:41:05,362 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 04:41:05,365 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 04:41:05,376 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 04:41:05,379 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 04:41:05,385 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 04:41:05,386 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 04:41:05,389 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 04:41:05,389 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 04:41:05,394 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 04:41:05,396 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 04:41:05,398 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 04:41:05,399 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 04:41:05,404 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 04:41:05,410 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 04:41:05,419 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 04:41:05,422 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 04:41:05,424 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 04:41:05,427 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 04:41:05,428 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 04:41:05,439 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 04:41:05,440 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 04:41:05,440 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 04:41:05,443 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 04:41:05,443 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 04:41:05,445 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 04:41:05,445 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 04:41:05,447 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 04:41:05,449 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 04:41:05,450 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 04:41:05,452 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 04:41:05,452 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 04:41:05,453 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 04:41:05,454 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 04:41:05,454 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 04:41:05,455 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 04:41:05,456 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 04:41:05,459 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5e1947d0-e711-4905-a03e-9610cc23064a/bin/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf [2020-11-28 04:41:05,502 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 04:41:05,502 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 04:41:05,504 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 04:41:05,504 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2020-11-28 04:41:05,505 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 04:41:05,505 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 04:41:05,506 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 04:41:05,506 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 04:41:05,506 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 04:41:05,507 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 04:41:05,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 04:41:05,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 04:41:05,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 04:41:05,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 04:41:05,509 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 04:41:05,509 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 04:41:05,509 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 04:41:05,509 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 04:41:05,510 INFO L136 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2020-11-28 04:41:05,510 INFO L138 SettingsManager]: * Timeout in seconds=1000000 [2020-11-28 04:41:05,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 04:41:05,511 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 04:41:05,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2020-11-28 04:41:05,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 04:41:05,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 04:41:05,512 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 04:41:05,512 INFO L138 SettingsManager]: * Trace refinement strategy=PENGUIN [2020-11-28 04:41:05,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 04:41:05,512 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 04:41:05,513 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-vcloud-master/worker/run_dir_5e1947d0-e711-4905-a03e-9610cc23064a/bin/ukojak/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_5e1947d0-e711-4905-a03e-9610cc23064a/bin/ukojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23bbff91fb2bcbd238fb97db06c7d4983c05a850 [2020-11-28 04:41:05,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 04:41:05,841 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 04:41:05,845 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 04:41:05,847 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 04:41:05,848 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 04:41:05,849 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5e1947d0-e711-4905-a03e-9610cc23064a/bin/ukojak/../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c [2020-11-28 04:41:05,947 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5e1947d0-e711-4905-a03e-9610cc23064a/bin/ukojak/data/02871f25f/f0cc1d467b04424cbd7c11ae136f65fb/FLAGcc2346c1d [2020-11-28 04:41:06,423 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 04:41:06,425 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5e1947d0-e711-4905-a03e-9610cc23064a/sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c [2020-11-28 04:41:06,436 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5e1947d0-e711-4905-a03e-9610cc23064a/bin/ukojak/data/02871f25f/f0cc1d467b04424cbd7c11ae136f65fb/FLAGcc2346c1d [2020-11-28 04:41:06,778 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5e1947d0-e711-4905-a03e-9610cc23064a/bin/ukojak/data/02871f25f/f0cc1d467b04424cbd7c11ae136f65fb [2020-11-28 04:41:06,781 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 04:41:06,785 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 04:41:06,791 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 04:41:06,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 04:41:06,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 04:41:06,797 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:41:06" (1/1) ... [2020-11-28 04:41:06,799 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b13a3a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:41:06, skipping insertion in model container [2020-11-28 04:41:06,800 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:41:06" (1/1) ... [2020-11-28 04:41:06,808 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 04:41:06,827 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 04:41:06,999 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 04:41:07,010 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 04:41:07,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 04:41:07,044 INFO L208 MainTranslator]: Completed translation [2020-11-28 04:41:07,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:41:07 WrapperNode [2020-11-28 04:41:07,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 04:41:07,046 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 04:41:07,046 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 04:41:07,047 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 04:41:07,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:41:07" (1/1) ... [2020-11-28 04:41:07,064 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:41:07" (1/1) ... [2020-11-28 04:41:07,083 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 04:41:07,084 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 04:41:07,084 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 04:41:07,084 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 04:41:07,094 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:41:07" (1/1) ... [2020-11-28 04:41:07,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:41:07" (1/1) ... [2020-11-28 04:41:07,096 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:41:07" (1/1) ... [2020-11-28 04:41:07,097 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:41:07" (1/1) ... [2020-11-28 04:41:07,101 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:41:07" (1/1) ... [2020-11-28 04:41:07,103 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:41:07" (1/1) ... [2020-11-28 04:41:07,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:41:07" (1/1) ... [2020-11-28 04:41:07,107 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 04:41:07,108 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 04:41:07,108 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 04:41:07,108 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 04:41:07,109 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:41:07" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5e1947d0-e711-4905-a03e-9610cc23064a/bin/ukojak/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2020-11-28 04:41:07,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 04:41:07,195 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-11-28 04:41:07,195 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-11-28 04:41:07,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 04:41:07,196 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-11-28 04:41:07,196 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-11-28 04:41:07,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 04:41:07,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 04:41:07,624 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 04:41:07,624 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-28 04:41:07,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:41:07 BoogieIcfgContainer [2020-11-28 04:41:07,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 04:41:07,628 INFO L113 PluginConnector]: ------------------------CodeCheck---------------------------- [2020-11-28 04:41:07,628 INFO L271 PluginConnector]: Initializing CodeCheck... [2020-11-28 04:41:07,641 INFO L275 PluginConnector]: CodeCheck initialized [2020-11-28 04:41:07,641 INFO L185 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:41:07" (1/1) ... [2020-11-28 04:41:07,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 04:41:07,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:41:07,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 26 states and 33 transitions. [2020-11-28 04:41:07,703 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2020-11-28 04:41:07,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 04:41:07,707 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:41:07,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 04:41:07,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 04:41:08,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:41:08,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 30 states and 39 transitions. [2020-11-28 04:41:08,050 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2020-11-28 04:41:08,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 04:41:08,051 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:41:08,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 04:41:08,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 04:41:08,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:41:08,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 34 states and 46 transitions. [2020-11-28 04:41:08,531 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2020-11-28 04:41:08,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-28 04:41:08,533 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:41:08,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 04:41:08,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 04:41:08,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:41:08,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 36 states and 50 transitions. [2020-11-28 04:41:08,917 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 50 transitions. [2020-11-28 04:41:08,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-28 04:41:08,919 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:41:08,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 04:41:09,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 04:41:10,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:41:10,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 43 states and 66 transitions. [2020-11-28 04:41:10,018 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 66 transitions. [2020-11-28 04:41:10,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-28 04:41:10,021 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:41:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 04:41:10,321 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-28 04:41:10,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:41:10,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 45 states and 69 transitions. [2020-11-28 04:41:10,976 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 69 transitions. [2020-11-28 04:41:10,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-28 04:41:10,978 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:41:11,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 04:41:11,326 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-28 04:41:12,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:41:12,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 45 states and 66 transitions. [2020-11-28 04:41:12,381 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 66 transitions. [2020-11-28 04:41:12,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-28 04:41:12,383 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:41:12,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 04:41:12,725 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-28 04:41:14,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:41:14,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 57 states and 102 transitions. [2020-11-28 04:41:14,179 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 102 transitions. [2020-11-28 04:41:14,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-11-28 04:41:14,183 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:41:14,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 04:41:14,222 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-11-28 04:41:14,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:41:14,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 57 states and 101 transitions. [2020-11-28 04:41:14,568 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 101 transitions. [2020-11-28 04:41:14,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-28 04:41:14,571 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:41:14,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 04:41:15,123 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-28 04:41:17,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:41:17,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 60 states and 107 transitions. [2020-11-28 04:41:17,195 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 107 transitions. [2020-11-28 04:41:17,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-28 04:41:17,204 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:41:17,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 04:41:17,440 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-11-28 04:41:19,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:41:19,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 72 states and 144 transitions. [2020-11-28 04:41:19,365 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 144 transitions. [2020-11-28 04:41:19,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-11-28 04:41:19,370 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:41:19,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 04:41:19,440 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 98 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-11-28 04:41:19,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:41:19,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 74 states and 148 transitions. [2020-11-28 04:41:19,924 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 148 transitions. [2020-11-28 04:41:19,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-11-28 04:41:19,932 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:41:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 04:41:20,565 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 97 proven. 116 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2020-11-28 04:41:23,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:41:23,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 79 states and 148 transitions. [2020-11-28 04:41:23,587 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 148 transitions. [2020-11-28 04:41:23,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-28 04:41:23,590 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:41:23,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 04:41:23,687 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-11-28 04:41:24,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:41:24,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 79 states and 147 transitions. [2020-11-28 04:41:24,146 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 147 transitions. [2020-11-28 04:41:24,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-11-28 04:41:24,149 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:41:24,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 04:41:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 100 proven. 30 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2020-11-28 04:41:24,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:41:24,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 79 states and 145 transitions. [2020-11-28 04:41:24,923 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 145 transitions. [2020-11-28 04:41:24,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-11-28 04:41:24,926 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:41:24,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 04:41:24,945 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 04:41:24,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 04:41:24,964 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 04:41:25,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 04:41:25,059 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 04:41:25,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 04:41:25,089 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 04:41:25,125 WARN L483 CodeCheckObserver]: This program is UNSAFE, Check terminated with 15 iterations. [2020-11-28 04:41:25,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 28.11 04:41:25 ImpRootNode [2020-11-28 04:41:25,213 INFO L132 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2020-11-28 04:41:25,213 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 04:41:25,213 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 04:41:25,214 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 04:41:25,214 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:41:07" (3/4) ... [2020-11-28 04:41:25,216 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 04:41:25,442 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_5e1947d0-e711-4905-a03e-9610cc23064a/bin/ukojak/witness.graphml [2020-11-28 04:41:25,442 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 04:41:25,445 INFO L168 Benchmark]: Toolchain (without parser) took 18658.92 ms. Allocated memory was 86.0 MB in the beginning and 293.6 MB in the end (delta: 207.6 MB). Free memory was 53.1 MB in the beginning and 151.5 MB in the end (delta: -98.3 MB). Peak memory consumption was 110.3 MB. Max. memory is 16.1 GB. [2020-11-28 04:41:25,445 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 86.0 MB. Free memory was 57.5 MB in the beginning and 57.5 MB in the end (delta: 28.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 04:41:25,447 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.11 ms. Allocated memory was 86.0 MB in the beginning and 115.3 MB in the end (delta: 29.4 MB). Free memory was 52.9 MB in the beginning and 92.4 MB in the end (delta: -39.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 04:41:25,447 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.15 ms. Allocated memory is still 115.3 MB. Free memory was 92.4 MB in the beginning and 91.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 04:41:25,448 INFO L168 Benchmark]: Boogie Preprocessor took 23.19 ms. Allocated memory is still 115.3 MB. Free memory was 91.0 MB in the beginning and 90.4 MB in the end (delta: 589.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 04:41:25,449 INFO L168 Benchmark]: RCFGBuilder took 519.26 ms. Allocated memory is still 115.3 MB. Free memory was 90.4 MB in the beginning and 75.1 MB in the end (delta: 15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-28 04:41:25,450 INFO L168 Benchmark]: CodeCheck took 17584.93 ms. Allocated memory was 115.3 MB in the beginning and 293.6 MB in the end (delta: 178.3 MB). Free memory was 75.1 MB in the beginning and 156.7 MB in the end (delta: -81.6 MB). Peak memory consumption was 98.5 MB. Max. memory is 16.1 GB. [2020-11-28 04:41:25,450 INFO L168 Benchmark]: Witness Printer took 229.25 ms. Allocated memory is still 293.6 MB. Free memory was 156.7 MB in the beginning and 151.5 MB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-28 04:41:25,463 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck: - StatisticsResult: Ultimate CodeCheck benchmark data CFG has 3 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 17.4s, OverallIterations: 15, TraceHistogramMax: 0, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 249164 SDtfs, 91308 SDslu, 116216 SDs, 0 SdLazy, 547758 SolverSat, 184734 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6942 GetRequests, 6575 SyntacticMatches, 155 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17437 ImplicationChecksByTransitivity, 14.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, traceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 929 NumberOfCodeBlocks, 929 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 810 ConstructedInterpolants, 0 QuantifiedInterpolants, 117560 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 1462/1809 InterpolantCoveringCapability, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L38] int x = 5; [L39] CALL, EXPR fibo1(x) VAL [\old(n)=5] [L10] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L12] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L20] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L22] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L10] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L12] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0, n=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L15] CALL, EXPR fibo2(n-2) 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-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L25] CALL, EXPR fibo1(n-2) 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); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=5, fibo2(n-1)=3, n=5] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-1) 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); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L15] return fibo2(n-1) + fibo2(n-2); [L39] RET, EXPR fibo1(x) [L39] int result = fibo1(x); [L40] COND TRUE result == 5 [L4] __assert_fail("0", "fibo_2calls_5-2.c", 4, "reach_error") * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 86.0 MB. Free memory was 57.5 MB in the beginning and 57.5 MB in the end (delta: 28.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 254.11 ms. Allocated memory was 86.0 MB in the beginning and 115.3 MB in the end (delta: 29.4 MB). Free memory was 52.9 MB in the beginning and 92.4 MB in the end (delta: -39.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.15 ms. Allocated memory is still 115.3 MB. Free memory was 92.4 MB in the beginning and 91.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.19 ms. Allocated memory is still 115.3 MB. Free memory was 91.0 MB in the beginning and 90.4 MB in the end (delta: 589.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 519.26 ms. Allocated memory is still 115.3 MB. Free memory was 90.4 MB in the beginning and 75.1 MB in the end (delta: 15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * CodeCheck took 17584.93 ms. Allocated memory was 115.3 MB in the beginning and 293.6 MB in the end (delta: 178.3 MB). Free memory was 75.1 MB in the beginning and 156.7 MB in the end (delta: -81.6 MB). Peak memory consumption was 98.5 MB. Max. memory is 16.1 GB. * Witness Printer took 229.25 ms. Allocated memory is still 293.6 MB. Free memory was 156.7 MB in the beginning and 151.5 MB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...