./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 cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_49d05676-c0e6-4706-ad9c-05a6ce7df8a3/bin/ukojak/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_49d05676-c0e6-4706-ad9c-05a6ce7df8a3/bin/ukojak/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_49d05676-c0e6-4706-ad9c-05a6ce7df8a3/bin/ukojak/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_49d05676-c0e6-4706-ad9c-05a6ce7df8a3/bin/ukojak/config/KojakReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_2-1.c -s /tmp/vcloud-vcloud-master/worker/working_dir_49d05676-c0e6-4706-ad9c-05a6ce7df8a3/bin/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_49d05676-c0e6-4706-ad9c-05a6ce7df8a3/bin/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 0.1.24-cad4683 [2019-10-22 10:11:54,964 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 10:11:54,966 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 10:11:54,975 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 10:11:54,975 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 10:11:54,981 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 10:11:54,982 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 10:11:54,983 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 10:11:54,984 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 10:11:54,984 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 10:11:54,985 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 10:11:54,986 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 10:11:54,986 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 10:11:54,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 10:11:54,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 10:11:54,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 10:11:54,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 10:11:54,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 10:11:54,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 10:11:54,992 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 10:11:54,993 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 10:11:54,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 10:11:54,995 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 10:11:54,996 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 10:11:55,001 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 10:11:55,004 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 10:11:55,005 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 10:11:55,006 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 10:11:55,006 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 10:11:55,007 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 10:11:55,007 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 10:11:55,007 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 10:11:55,010 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 10:11:55,010 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 10:11:55,011 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 10:11:55,011 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 10:11:55,012 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 10:11:55,012 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 10:11:55,012 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 10:11:55,013 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 10:11:55,014 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 10:11:55,014 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_49d05676-c0e6-4706-ad9c-05a6ce7df8a3/bin/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf [2019-10-22 10:11:55,030 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 10:11:55,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 10:11:55,033 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 10:11:55,034 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2019-10-22 10:11:55,034 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 10:11:55,034 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 10:11:55,034 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 10:11:55,035 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 10:11:55,035 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 10:11:55,035 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 10:11:55,035 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 10:11:55,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 10:11:55,036 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 10:11:55,036 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 10:11:55,036 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 10:11:55,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 10:11:55,036 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 10:11:55,036 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 10:11:55,036 INFO L136 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2019-10-22 10:11:55,037 INFO L138 SettingsManager]: * Timeout in seconds=1000000 [2019-10-22 10:11:55,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 10:11:55,037 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 10:11:55,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2019-10-22 10:11:55,037 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 10:11:55,037 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 10:11:55,038 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 10:11:55,038 INFO L138 SettingsManager]: * Trace refinement strategy=PENGUIN [2019-10-22 10:11:55,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 10:11:55,038 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 10:11:55,038 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_49d05676-c0e6-4706-ad9c-05a6ce7df8a3/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(__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 [2019-10-22 10:11:55,069 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 10:11:55,081 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 10:11:55,087 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 10:11:55,089 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 10:11:55,089 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 10:11:55,090 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_49d05676-c0e6-4706-ad9c-05a6ce7df8a3/bin/ukojak/../../sv-benchmarks/c/recursive-simple/fibo_2calls_2-1.c [2019-10-22 10:11:55,141 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_49d05676-c0e6-4706-ad9c-05a6ce7df8a3/bin/ukojak/data/87bb86a59/81f5b176a6f14ed8be71cf71170899af/FLAGc48ce426f [2019-10-22 10:11:55,524 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 10:11:55,525 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_49d05676-c0e6-4706-ad9c-05a6ce7df8a3/sv-benchmarks/c/recursive-simple/fibo_2calls_2-1.c [2019-10-22 10:11:55,531 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_49d05676-c0e6-4706-ad9c-05a6ce7df8a3/bin/ukojak/data/87bb86a59/81f5b176a6f14ed8be71cf71170899af/FLAGc48ce426f [2019-10-22 10:11:55,932 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_49d05676-c0e6-4706-ad9c-05a6ce7df8a3/bin/ukojak/data/87bb86a59/81f5b176a6f14ed8be71cf71170899af [2019-10-22 10:11:55,935 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 10:11:55,936 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 10:11:55,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 10:11:55,937 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 10:11:55,941 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 10:11:55,942 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 10:11:55" (1/1) ... [2019-10-22 10:11:55,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f2fc858 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:11:55, skipping insertion in model container [2019-10-22 10:11:55,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 10:11:55" (1/1) ... [2019-10-22 10:11:55,951 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 10:11:55,966 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 10:11:56,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 10:11:56,083 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 10:11:56,149 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 10:11:56,162 INFO L192 MainTranslator]: Completed translation [2019-10-22 10:11:56,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:11:56 WrapperNode [2019-10-22 10:11:56,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 10:11:56,163 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 10:11:56,164 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 10:11:56,164 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 10:11:56,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:11:56" (1/1) ... [2019-10-22 10:11:56,176 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:11:56" (1/1) ... [2019-10-22 10:11:56,191 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 10:11:56,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 10:11:56,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 10:11:56,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 10:11:56,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:11:56" (1/1) ... [2019-10-22 10:11:56,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:11:56" (1/1) ... [2019-10-22 10:11:56,199 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:11:56" (1/1) ... [2019-10-22 10:11:56,199 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:11:56" (1/1) ... [2019-10-22 10:11:56,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:11:56" (1/1) ... [2019-10-22 10:11:56,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:11:56" (1/1) ... [2019-10-22 10:11:56,203 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:11:56" (1/1) ... [2019-10-22 10:11:56,204 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 10:11:56,205 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 10:11:56,205 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 10:11:56,205 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 10:11:56,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:11:56" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_49d05676-c0e6-4706-ad9c-05a6ce7df8a3/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 [2019-10-22 10:11:56,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 10:11:56,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 10:11:56,268 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2019-10-22 10:11:56,268 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2019-10-22 10:11:56,268 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2019-10-22 10:11:56,268 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2019-10-22 10:11:56,411 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 10:11:56,412 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 10:11:56,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:11:56 BoogieIcfgContainer [2019-10-22 10:11:56,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 10:11:56,413 INFO L113 PluginConnector]: ------------------------CodeCheck---------------------------- [2019-10-22 10:11:56,413 INFO L271 PluginConnector]: Initializing CodeCheck... [2019-10-22 10:11:56,423 INFO L275 PluginConnector]: CodeCheck initialized [2019-10-22 10:11:56,423 INFO L185 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:11:56" (1/1) ... [2019-10-22 10:11:56,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 10:11:56,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2019-10-22 10:11:56,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 26 states and 33 transitions. [2019-10-22 10:11:56,467 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-10-22 10:11:56,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 10:11:56,471 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2019-10-22 10:11:56,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 10:11:56,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 10:11:56,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2019-10-22 10:11:56,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 30 states and 41 transitions. [2019-10-22 10:11:56,784 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2019-10-22 10:11:56,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 10:11:56,785 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2019-10-22 10:11:56,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 10:11:56,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 10:11:57,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2019-10-22 10:11:57,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 32 states and 45 transitions. [2019-10-22 10:11:57,020 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 45 transitions. [2019-10-22 10:11:57,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-22 10:11:57,021 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2019-10-22 10:11:57,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 10:11:57,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 10:11:58,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2019-10-22 10:11:58,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 41 states and 65 transitions. [2019-10-22 10:11:58,112 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 65 transitions. [2019-10-22 10:11:58,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-22 10:11:58,120 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2019-10-22 10:11:58,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 10:11:58,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 10:11:58,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2019-10-22 10:11:58,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 46 states and 79 transitions. [2019-10-22 10:11:58,871 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 79 transitions. [2019-10-22 10:11:58,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-22 10:11:58,872 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2019-10-22 10:11:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 10:11:58,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 10:11:58,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 10:11:58,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 10:11:58,930 WARN L489 CodeCheckObserver]: This program is UNSAFE, Check terminated with 5 iterations. [2019-10-22 10:11:58,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 22.10 10:11:58 ImpRootNode [2019-10-22 10:11:58,959 INFO L132 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2019-10-22 10:11:58,960 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 10:11:58,960 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 10:11:58,960 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 10:11:58,960 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:11:56" (3/4) ... [2019-10-22 10:11:58,962 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 10:11:59,020 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_49d05676-c0e6-4706-ad9c-05a6ce7df8a3/bin/ukojak/witness.graphml [2019-10-22 10:11:59,020 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 10:11:59,023 INFO L168 Benchmark]: Toolchain (without parser) took 3085.69 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 229.6 MB). Free memory was 944.5 MB in the beginning and 1.1 GB in the end (delta: -177.1 MB). Peak memory consumption was 52.6 MB. Max. memory is 11.5 GB. [2019-10-22 10:11:59,023 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 962.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 10:11:59,036 INFO L168 Benchmark]: CACSL2BoogieTranslator took 226.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 176.7 MB). Free memory was 944.5 MB in the beginning and 1.2 GB in the end (delta: -225.8 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-10-22 10:11:59,037 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.63 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 10:11:59,037 INFO L168 Benchmark]: Boogie Preprocessor took 13.38 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 11.5 GB. [2019-10-22 10:11:59,038 INFO L168 Benchmark]: RCFGBuilder took 208.08 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 11.5 GB. [2019-10-22 10:11:59,039 INFO L168 Benchmark]: CodeCheck took 2546.14 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 53.0 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.7 MB). Peak memory consumption was 75.6 MB. Max. memory is 11.5 GB. [2019-10-22 10:11:59,040 INFO L168 Benchmark]: Witness Printer took 60.76 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 11.5 GB. [2019-10-22 10:11:59,044 INFO L335 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. Result: UNSAFE, OverallTime: 2.4s, OverallIterations: 5, TraceHistogramMax: 0, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 124 SDtfs, 90 SDslu, 88 SDs, 0 SdLazy, 796 SolverSat, 222 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 609 GetRequests, 534 SyntacticMatches, 14 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, traceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 87 NumberOfCodeBlocks, 87 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 60 ConstructedInterpolants, 0 QuantifiedInterpolants, 2871 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 2/8 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: 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] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, 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] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, 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 962.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 226.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 176.7 MB). Free memory was 944.5 MB in the beginning and 1.2 GB in the end (delta: -225.8 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 27.63 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.38 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 11.5 GB. * RCFGBuilder took 208.08 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 11.5 GB. * CodeCheck took 2546.14 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 53.0 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.7 MB). Peak memory consumption was 75.6 MB. Max. memory is 11.5 GB. * Witness Printer took 60.76 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 11.5 GB. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...