./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_2_false-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_c05f04c2-4ac3-455b-9bc4-3cc46355bdc4/bin-2019/ukojak/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_c05f04c2-4ac3-455b-9bc4-3cc46355bdc4/bin-2019/ukojak/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_c05f04c2-4ac3-455b-9bc4-3cc46355bdc4/bin-2019/ukojak/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_c05f04c2-4ac3-455b-9bc4-3cc46355bdc4/bin-2019/ukojak/config/KojakReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_2_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_c05f04c2-4ac3-455b-9bc4-3cc46355bdc4/bin-2019/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_c05f04c2-4ac3-455b-9bc4-3cc46355bdc4/bin-2019/ukojak --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Kojak --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0d7907681604b1ce9d21af31806cc60e045b313d ........................................................................................................................................................................................................................................................... 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 0.1.23-5842f4b [2018-11-18 17:29:03,355 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 17:29:03,356 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 17:29:03,363 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 17:29:03,363 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 17:29:03,364 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 17:29:03,365 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 17:29:03,366 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 17:29:03,367 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 17:29:03,368 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 17:29:03,369 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 17:29:03,369 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 17:29:03,369 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 17:29:03,370 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 17:29:03,371 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 17:29:03,372 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 17:29:03,372 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 17:29:03,374 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 17:29:03,375 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 17:29:03,376 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 17:29:03,377 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 17:29:03,378 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 17:29:03,380 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 17:29:03,380 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 17:29:03,380 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 17:29:03,381 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 17:29:03,381 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 17:29:03,382 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 17:29:03,382 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 17:29:03,384 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 17:29:03,384 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 17:29:03,385 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 17:29:03,385 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 17:29:03,385 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 17:29:03,386 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 17:29:03,386 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 17:29:03,386 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_c05f04c2-4ac3-455b-9bc4-3cc46355bdc4/bin-2019/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf [2018-11-18 17:29:03,397 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 17:29:03,397 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 17:29:03,397 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 17:29:03,398 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-18 17:29:03,398 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 17:29:03,398 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 17:29:03,398 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 17:29:03,398 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 17:29:03,399 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 17:29:03,399 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 17:29:03,399 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 17:29:03,399 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 17:29:03,400 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 17:29:03,400 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 17:29:03,400 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 17:29:03,400 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 17:29:03,400 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 17:29:03,400 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 17:29:03,400 INFO L131 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2018-11-18 17:29:03,401 INFO L133 SettingsManager]: * Timeout in seconds=1000000 [2018-11-18 17:29:03,401 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 17:29:03,401 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 17:29:03,401 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2018-11-18 17:29:03,401 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 17:29:03,401 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 17:29:03,402 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 17:29:03,402 INFO L133 SettingsManager]: * Trace refinement strategy=PENGUIN [2018-11-18 17:29:03,402 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 17:29:03,402 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 17:29:03,402 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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/working_dir_c05f04c2-4ac3-455b-9bc4-3cc46355bdc4/bin-2019/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(__VERIFIER_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 -> 0d7907681604b1ce9d21af31806cc60e045b313d [2018-11-18 17:29:03,427 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 17:29:03,435 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 17:29:03,438 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 17:29:03,439 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 17:29:03,439 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 17:29:03,440 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_c05f04c2-4ac3-455b-9bc4-3cc46355bdc4/bin-2019/ukojak/../../sv-benchmarks/c/recursive-simple/fibo_2calls_2_false-unreach-call_true-termination.c [2018-11-18 17:29:03,482 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c05f04c2-4ac3-455b-9bc4-3cc46355bdc4/bin-2019/ukojak/data/2ca36b248/8de2e5974ee846d0aa347db5dde6faad/FLAGa6d2d49bc [2018-11-18 17:29:03,866 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 17:29:03,867 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_c05f04c2-4ac3-455b-9bc4-3cc46355bdc4/sv-benchmarks/c/recursive-simple/fibo_2calls_2_false-unreach-call_true-termination.c [2018-11-18 17:29:03,870 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c05f04c2-4ac3-455b-9bc4-3cc46355bdc4/bin-2019/ukojak/data/2ca36b248/8de2e5974ee846d0aa347db5dde6faad/FLAGa6d2d49bc [2018-11-18 17:29:03,878 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_c05f04c2-4ac3-455b-9bc4-3cc46355bdc4/bin-2019/ukojak/data/2ca36b248/8de2e5974ee846d0aa347db5dde6faad [2018-11-18 17:29:03,880 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 17:29:03,881 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 17:29:03,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 17:29:03,881 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 17:29:03,883 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 17:29:03,884 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 05:29:03" (1/1) ... [2018-11-18 17:29:03,885 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64c0c63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:29:03, skipping insertion in model container [2018-11-18 17:29:03,885 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 05:29:03" (1/1) ... [2018-11-18 17:29:03,890 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 17:29:03,899 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 17:29:03,998 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 17:29:04,001 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 17:29:04,011 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 17:29:04,019 INFO L195 MainTranslator]: Completed translation [2018-11-18 17:29:04,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:29:04 WrapperNode [2018-11-18 17:29:04,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 17:29:04,020 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 17:29:04,020 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 17:29:04,020 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 17:29:04,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:29:04" (1/1) ... [2018-11-18 17:29:04,028 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:29:04" (1/1) ... [2018-11-18 17:29:04,038 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 17:29:04,038 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 17:29:04,038 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 17:29:04,039 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 17:29:04,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:29:04" (1/1) ... [2018-11-18 17:29:04,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:29:04" (1/1) ... [2018-11-18 17:29:04,044 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:29:04" (1/1) ... [2018-11-18 17:29:04,045 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:29:04" (1/1) ... [2018-11-18 17:29:04,046 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:29:04" (1/1) ... [2018-11-18 17:29:04,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:29:04" (1/1) ... [2018-11-18 17:29:04,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:29:04" (1/1) ... [2018-11-18 17:29:04,049 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 17:29:04,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 17:29:04,049 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 17:29:04,049 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 17:29:04,050 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:29:04" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c05f04c2-4ac3-455b-9bc4-3cc46355bdc4/bin-2019/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 [2018-11-18 17:29:04,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 17:29:04,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 17:29:04,126 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2018-11-18 17:29:04,126 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2018-11-18 17:29:04,126 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2018-11-18 17:29:04,126 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2018-11-18 17:29:04,251 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 17:29:04,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 05:29:04 BoogieIcfgContainer [2018-11-18 17:29:04,252 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 17:29:04,252 INFO L113 PluginConnector]: ------------------------CodeCheck---------------------------- [2018-11-18 17:29:04,252 INFO L271 PluginConnector]: Initializing CodeCheck... [2018-11-18 17:29:04,259 INFO L276 PluginConnector]: CodeCheck initialized [2018-11-18 17:29:04,260 INFO L185 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 05:29:04" (1/1) ... [2018-11-18 17:29:04,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:29:04,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-11-18 17:29:04,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 26 states and 33 transitions. [2018-11-18 17:29:04,306 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2018-11-18 17:29:04,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-18 17:29:04,311 INFO L427 CodeCheckObserver]: Error Path is FOUND. [2018-11-18 17:29:04,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:29:04,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 17:29:04,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-11-18 17:29:04,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 28 states and 37 transitions. [2018-11-18 17:29:04,513 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2018-11-18 17:29:04,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-18 17:29:04,513 INFO L427 CodeCheckObserver]: Error Path is FOUND. [2018-11-18 17:29:04,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:29:04,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 17:29:04,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-11-18 17:29:04,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 30 states and 41 transitions. [2018-11-18 17:29:04,623 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2018-11-18 17:29:04,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-18 17:29:04,624 INFO L427 CodeCheckObserver]: Error Path is FOUND. [2018-11-18 17:29:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:29:04,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 17:29:04,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-11-18 17:29:04,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 32 states and 45 transitions. [2018-11-18 17:29:04,872 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 45 transitions. [2018-11-18 17:29:04,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-18 17:29:04,873 INFO L427 CodeCheckObserver]: Error Path is FOUND. [2018-11-18 17:29:04,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 17:29:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 17:29:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 17:29:04,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 17:29:04,933 WARN L493 CodeCheckObserver]: This program is UNSAFE, Check terminated with 4 iterations. [2018-11-18 17:29:04,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 18.11 05:29:04 ImpRootNode [2018-11-18 17:29:04,952 INFO L132 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2018-11-18 17:29:04,952 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 17:29:04,952 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 17:29:04,953 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 17:29:04,953 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 05:29:04" (3/4) ... [2018-11-18 17:29:04,955 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-18 17:29:04,985 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_c05f04c2-4ac3-455b-9bc4-3cc46355bdc4/bin-2019/ukojak/witness.graphml [2018-11-18 17:29:04,985 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 17:29:04,985 INFO L168 Benchmark]: Toolchain (without parser) took 1105.14 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.5 MB). Free memory was 958.2 MB in the beginning and 1.0 GB in the end (delta: -68.4 MB). Peak memory consumption was 62.1 MB. Max. memory is 11.5 GB. [2018-11-18 17:29:04,987 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 17:29:04,987 INFO L168 Benchmark]: CACSL2BoogieTranslator took 138.73 ms. Allocated memory is still 1.0 GB. Free memory was 958.2 MB in the beginning and 947.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 17:29:04,988 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.09 ms. Allocated memory is still 1.0 GB. Free memory was 947.4 MB in the beginning and 944.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 17:29:04,988 INFO L168 Benchmark]: Boogie Preprocessor took 10.68 ms. Allocated memory is still 1.0 GB. Free memory is still 944.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 17:29:04,988 INFO L168 Benchmark]: RCFGBuilder took 202.66 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.5 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -171.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 11.5 GB. [2018-11-18 17:29:04,989 INFO L168 Benchmark]: CodeCheck took 699.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 89.6 MB). Peak memory consumption was 89.6 MB. Max. memory is 11.5 GB. [2018-11-18 17:29:04,989 INFO L168 Benchmark]: Witness Printer took 32.48 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 17:29:04,992 INFO L336 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, 29 locations, 1 error locations. UNSAFE Result, 0.6s OverallTime, 4 OverallIterations, 0 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 70 SDtfs, 32 SDslu, 60 SDs, 0 SdLazy, 174 SolverSat, 50 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 329 GetRequests, 304 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, traceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 64 NumberOfCodeBlocks, 64 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 38 ConstructedInterpolants, 0 QuantifiedInterpolants, 950 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 1/4 InterpolantCoveringCapability, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 2; [L37] CALL, EXPR fibo1(x) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L13] EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] RET return 0; VAL [\old(n)=0, \result=0, n=0] [L13] EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] RET return fibo2(n-1) + fibo2(n-2); [L37] EXPR fibo1(x) [L37] int result = fibo1(x); [L38] COND TRUE result == 1 [L39] __VERIFIER_error() * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 138.73 ms. Allocated memory is still 1.0 GB. Free memory was 958.2 MB in the beginning and 947.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 18.09 ms. Allocated memory is still 1.0 GB. Free memory was 947.4 MB in the beginning and 944.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.68 ms. Allocated memory is still 1.0 GB. Free memory is still 944.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 202.66 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.5 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -171.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 11.5 GB. * CodeCheck took 699.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 89.6 MB). Peak memory consumption was 89.6 MB. Max. memory is 11.5 GB. * Witness Printer took 32.48 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...