./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 a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_e2035aa4-cd09-45de-8aab-b57d1955760e/bin/ukojak/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_e2035aa4-cd09-45de-8aab-b57d1955760e/bin/ukojak/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e2035aa4-cd09-45de-8aab-b57d1955760e/bin/ukojak/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e2035aa4-cd09-45de-8aab-b57d1955760e/bin/ukojak/config/KojakReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_2-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_e2035aa4-cd09-45de-8aab-b57d1955760e/bin/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e2035aa4-cd09-45de-8aab-b57d1955760e/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 266436f0336fa87343e9fe2aac074f47fa1a621a ................................................................................................................................................................................................................................................................. 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 04:42:57,200 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 04:42:57,202 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 04:42:57,275 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 04:42:57,276 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 04:42:57,277 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 04:42:57,279 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 04:42:57,283 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 04:42:57,288 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 04:42:57,293 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 04:42:57,301 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 04:42:57,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 04:42:57,305 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 04:42:57,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 04:42:57,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 04:42:57,316 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 04:42:57,317 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 04:42:57,319 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 04:42:57,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 04:42:57,331 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 04:42:57,333 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 04:42:57,334 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 04:42:57,337 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 04:42:57,338 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 04:42:57,348 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 04:42:57,348 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 04:42:57,348 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 04:42:57,349 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 04:42:57,350 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 04:42:57,351 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 04:42:57,351 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 04:42:57,352 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 04:42:57,353 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 04:42:57,354 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 04:42:57,355 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 04:42:57,356 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 04:42:57,356 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 04:42:57,357 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 04:42:57,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 04:42:57,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 04:42:57,365 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 04:42:57,367 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e2035aa4-cd09-45de-8aab-b57d1955760e/bin/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf [2020-11-28 04:42:57,407 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 04:42:57,407 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 04:42:57,408 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 04:42:57,409 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2020-11-28 04:42:57,409 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 04:42:57,409 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 04:42:57,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 04:42:57,410 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 04:42:57,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 04:42:57,410 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 04:42:57,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 04:42:57,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 04:42:57,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 04:42:57,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 04:42:57,412 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 04:42:57,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 04:42:57,412 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 04:42:57,412 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 04:42:57,412 INFO L136 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2020-11-28 04:42:57,413 INFO L138 SettingsManager]: * Timeout in seconds=1000000 [2020-11-28 04:42:57,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 04:42:57,413 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 04:42:57,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2020-11-28 04:42:57,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 04:42:57,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 04:42:57,414 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 04:42:57,414 INFO L138 SettingsManager]: * Trace refinement strategy=PENGUIN [2020-11-28 04:42:57,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 04:42:57,414 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 04:42:57,416 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_e2035aa4-cd09-45de-8aab-b57d1955760e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_e2035aa4-cd09-45de-8aab-b57d1955760e/bin/ukojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 266436f0336fa87343e9fe2aac074f47fa1a621a [2020-11-28 04:42:57,732 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 04:42:57,757 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 04:42:57,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 04:42:57,761 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 04:42:57,761 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 04:42:57,762 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e2035aa4-cd09-45de-8aab-b57d1955760e/bin/ukojak/../../sv-benchmarks/c/recursive-simple/fibo_2calls_2-1.c [2020-11-28 04:42:57,840 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e2035aa4-cd09-45de-8aab-b57d1955760e/bin/ukojak/data/3804ee63a/4f85e421eb6448fc864fbb477b7638a9/FLAGc38fe9e5c [2020-11-28 04:42:58,341 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 04:42:58,342 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e2035aa4-cd09-45de-8aab-b57d1955760e/sv-benchmarks/c/recursive-simple/fibo_2calls_2-1.c [2020-11-28 04:42:58,353 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e2035aa4-cd09-45de-8aab-b57d1955760e/bin/ukojak/data/3804ee63a/4f85e421eb6448fc864fbb477b7638a9/FLAGc38fe9e5c [2020-11-28 04:42:58,695 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e2035aa4-cd09-45de-8aab-b57d1955760e/bin/ukojak/data/3804ee63a/4f85e421eb6448fc864fbb477b7638a9 [2020-11-28 04:42:58,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 04:42:58,699 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 04:42:58,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 04:42:58,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 04:42:58,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 04:42:58,705 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:42:58" (1/1) ... [2020-11-28 04:42:58,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5eb91f4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:42:58, skipping insertion in model container [2020-11-28 04:42:58,708 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:42:58" (1/1) ... [2020-11-28 04:42:58,715 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 04:42:58,728 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 04:42:58,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 04:42:58,928 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 04:42:58,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 04:42:58,971 INFO L208 MainTranslator]: Completed translation [2020-11-28 04:42:58,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:42:58 WrapperNode [2020-11-28 04:42:58,973 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 04:42:58,974 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 04:42:58,975 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 04:42:58,975 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 04:42:58,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:42:58" (1/1) ... [2020-11-28 04:42:58,988 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:42:58" (1/1) ... [2020-11-28 04:42:59,004 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 04:42:59,005 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 04:42:59,005 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 04:42:59,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 04:42:59,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:42:58" (1/1) ... [2020-11-28 04:42:59,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:42:58" (1/1) ... [2020-11-28 04:42:59,013 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:42:58" (1/1) ... [2020-11-28 04:42:59,014 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:42:58" (1/1) ... [2020-11-28 04:42:59,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:42:58" (1/1) ... [2020-11-28 04:42:59,019 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:42:58" (1/1) ... [2020-11-28 04:42:59,020 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:42:58" (1/1) ... [2020-11-28 04:42:59,022 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 04:42:59,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 04:42:59,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 04:42:59,023 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 04:42:59,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:42:58" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e2035aa4-cd09-45de-8aab-b57d1955760e/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 04:42:59,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 04:42:59,089 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-11-28 04:42:59,089 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-11-28 04:42:59,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 04:42:59,089 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-11-28 04:42:59,089 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-11-28 04:42:59,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 04:42:59,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 04:42:59,580 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 04:42:59,580 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-28 04:42:59,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:42:59 BoogieIcfgContainer [2020-11-28 04:42:59,582 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 04:42:59,583 INFO L113 PluginConnector]: ------------------------CodeCheck---------------------------- [2020-11-28 04:42:59,584 INFO L271 PluginConnector]: Initializing CodeCheck... [2020-11-28 04:42:59,595 INFO L275 PluginConnector]: CodeCheck initialized [2020-11-28 04:42:59,595 INFO L185 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:42:59" (1/1) ... [2020-11-28 04:42:59,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 04:42:59,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:42:59,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 26 states and 33 transitions. [2020-11-28 04:42:59,660 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2020-11-28 04:42:59,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 04:42:59,665 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:42:59,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 04:42:59,868 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 04:42:59,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:42:59,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 30 states and 39 transitions. [2020-11-28 04:42:59,955 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2020-11-28 04:42:59,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 04:42:59,955 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:42:59,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 04:43:00,063 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 04:43:00,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:43:00,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 32 states and 43 transitions. [2020-11-28 04:43:00,289 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2020-11-28 04:43:00,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-28 04:43:00,291 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:43:00,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 04:43:00,454 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 04:43:00,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:43:00,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 34 states and 47 transitions. [2020-11-28 04:43:00,733 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 47 transitions. [2020-11-28 04:43:00,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-28 04:43:00,735 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:43:00,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 04:43:00,782 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 04:43:00,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 04:43:00,811 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 04:43:00,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 04:43:00,883 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 04:43:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 04:43:00,899 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 04:43:00,933 WARN L483 CodeCheckObserver]: This program is UNSAFE, Check terminated with 4 iterations. [2020-11-28 04:43:00,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 28.11 04:43:00 ImpRootNode [2020-11-28 04:43:00,985 INFO L132 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2020-11-28 04:43:00,986 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 04:43:00,986 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 04:43:00,987 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 04:43:00,987 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:42:59" (3/4) ... [2020-11-28 04:43:00,989 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 04:43:01,079 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_e2035aa4-cd09-45de-8aab-b57d1955760e/bin/ukojak/witness.graphml [2020-11-28 04:43:01,081 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 04:43:01,083 INFO L168 Benchmark]: Toolchain (without parser) took 2382.93 ms. Allocated memory is still 130.0 MB. Free memory was 97.5 MB in the beginning and 47.0 MB in the end (delta: 50.4 MB). Peak memory consumption was 49.3 MB. Max. memory is 16.1 GB. [2020-11-28 04:43:01,087 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 75.5 MB. Free memory was 32.7 MB in the beginning and 32.7 MB in the end (delta: 33.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 04:43:01,088 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.09 ms. Allocated memory is still 130.0 MB. Free memory was 97.2 MB in the beginning and 105.9 MB in the end (delta: -8.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 04:43:01,090 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.66 ms. Allocated memory is still 130.0 MB. Free memory was 105.9 MB in the beginning and 104.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 04:43:01,091 INFO L168 Benchmark]: Boogie Preprocessor took 17.42 ms. Allocated memory is still 130.0 MB. Free memory was 104.5 MB in the beginning and 103.8 MB in the end (delta: 743.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 04:43:01,091 INFO L168 Benchmark]: RCFGBuilder took 559.81 ms. Allocated memory is still 130.0 MB. Free memory was 103.8 MB in the beginning and 89.1 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-28 04:43:01,093 INFO L168 Benchmark]: CodeCheck took 1402.14 ms. Allocated memory is still 130.0 MB. Free memory was 89.1 MB in the beginning and 50.1 MB in the end (delta: 39.0 MB). Peak memory consumption was 41.7 MB. Max. memory is 16.1 GB. [2020-11-28 04:43:01,094 INFO L168 Benchmark]: Witness Printer took 95.09 ms. Allocated memory is still 130.0 MB. Free memory was 49.1 MB in the beginning and 47.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 04:43:01,099 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: 1.3s, OverallIterations: 4, TraceHistogramMax: 0, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 94 SDtfs, 30 SDslu, 36 SDs, 0 SdLazy, 196 SolverSat, 66 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 314 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, traceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s 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 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 = 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) [L39] int result = fibo1(x); [L40] COND TRUE result == 1 [L4] __assert_fail("0", "fibo_2calls_2-1.c", 4, "reach_error") * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 75.5 MB. Free memory was 32.7 MB in the beginning and 32.7 MB in the end (delta: 33.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 272.09 ms. Allocated memory is still 130.0 MB. Free memory was 97.2 MB in the beginning and 105.9 MB in the end (delta: -8.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.66 ms. Allocated memory is still 130.0 MB. Free memory was 105.9 MB in the beginning and 104.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.42 ms. Allocated memory is still 130.0 MB. Free memory was 104.5 MB in the beginning and 103.8 MB in the end (delta: 743.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 559.81 ms. Allocated memory is still 130.0 MB. Free memory was 103.8 MB in the beginning and 89.1 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * CodeCheck took 1402.14 ms. Allocated memory is still 130.0 MB. Free memory was 89.1 MB in the beginning and 50.1 MB in the end (delta: 39.0 MB). Peak memory consumption was 41.7 MB. Max. memory is 16.1 GB. * Witness Printer took 95.09 ms. Allocated memory is still 130.0 MB. Free memory was 49.1 MB in the beginning and 47.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...