./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 69874e26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_4a9616a1-22de-429c-bb98-2923b4c9dc0e/bin/ukojak/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_4a9616a1-22de-429c-bb98-2923b4c9dc0e/bin/ukojak/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4a9616a1-22de-429c-bb98-2923b4c9dc0e/bin/ukojak/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4a9616a1-22de-429c-bb98-2923b4c9dc0e/bin/ukojak/config/KojakReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_4a9616a1-22de-429c-bb98-2923b4c9dc0e/bin/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4a9616a1-22de-429c-bb98-2923b4c9dc0e/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 92a849e92f30134540f9595cfce3299e46e1c2b1 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 0.2.0-69874e2 [2020-12-01 17:37:54,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 17:37:54,754 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 17:37:54,846 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 17:37:54,881 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 17:37:54,882 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 17:37:54,884 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 17:37:54,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 17:37:54,890 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 17:37:54,892 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 17:37:54,893 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 17:37:54,895 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 17:37:54,896 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 17:37:54,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 17:37:54,900 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 17:37:54,902 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 17:37:54,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 17:37:54,905 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 17:37:54,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 17:37:54,912 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 17:37:54,914 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 17:37:54,917 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 17:37:54,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 17:37:54,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 17:37:54,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 17:37:54,926 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 17:37:54,927 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 17:37:54,928 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 17:37:54,929 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 17:37:54,931 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 17:37:54,931 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 17:37:54,933 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 17:37:54,934 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 17:37:54,935 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 17:37:54,937 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 17:37:54,938 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 17:37:54,939 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 17:37:54,940 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 17:37:54,940 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 17:37:54,942 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 17:37:54,943 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 17:37:54,944 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4a9616a1-22de-429c-bb98-2923b4c9dc0e/bin/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf [2020-12-01 17:37:54,971 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 17:37:54,971 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 17:37:54,972 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-01 17:37:54,972 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2020-12-01 17:37:54,973 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 17:37:54,973 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 17:37:54,974 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 17:37:54,974 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 17:37:54,974 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 17:37:54,974 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 17:37:54,974 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 17:37:54,975 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-01 17:37:54,975 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 17:37:54,975 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-01 17:37:54,975 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 17:37:54,975 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 17:37:54,976 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 17:37:54,976 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-01 17:37:54,976 INFO L136 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2020-12-01 17:37:54,976 INFO L138 SettingsManager]: * Timeout in seconds=1000000 [2020-12-01 17:37:54,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 17:37:54,977 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 17:37:54,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2020-12-01 17:37:54,977 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 17:37:54,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 17:37:54,978 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-01 17:37:54,978 INFO L138 SettingsManager]: * Trace refinement strategy=PENGUIN [2020-12-01 17:37:54,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-01 17:37:54,978 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-01 17:37:54,979 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_4a9616a1-22de-429c-bb98-2923b4c9dc0e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_4a9616a1-22de-429c-bb98-2923b4c9dc0e/bin/ukojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 92a849e92f30134540f9595cfce3299e46e1c2b1 [2020-12-01 17:37:55,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 17:37:55,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 17:37:55,290 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 17:37:55,292 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 17:37:55,293 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 17:37:55,294 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4a9616a1-22de-429c-bb98-2923b4c9dc0e/bin/ukojak/../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-2.c [2020-12-01 17:37:55,389 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4a9616a1-22de-429c-bb98-2923b4c9dc0e/bin/ukojak/data/4d9c017f9/925e129e58114ef8a3989f791c79e388/FLAG2e5badef6 [2020-12-01 17:37:56,001 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 17:37:56,004 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4a9616a1-22de-429c-bb98-2923b4c9dc0e/sv-benchmarks/c/recursive-simple/fibo_2calls_6-2.c [2020-12-01 17:37:56,019 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4a9616a1-22de-429c-bb98-2923b4c9dc0e/bin/ukojak/data/4d9c017f9/925e129e58114ef8a3989f791c79e388/FLAG2e5badef6 [2020-12-01 17:37:56,352 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4a9616a1-22de-429c-bb98-2923b4c9dc0e/bin/ukojak/data/4d9c017f9/925e129e58114ef8a3989f791c79e388 [2020-12-01 17:37:56,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 17:37:56,366 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 17:37:56,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 17:37:56,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 17:37:56,377 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 17:37:56,378 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 05:37:56" (1/1) ... [2020-12-01 17:37:56,381 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39796c5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:37:56, skipping insertion in model container [2020-12-01 17:37:56,381 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 05:37:56" (1/1) ... [2020-12-01 17:37:56,391 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 17:37:56,409 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 17:37:56,646 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 17:37:56,662 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 17:37:56,694 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 17:37:56,719 INFO L208 MainTranslator]: Completed translation [2020-12-01 17:37:56,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:37:56 WrapperNode [2020-12-01 17:37:56,722 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 17:37:56,724 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 17:37:56,724 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 17:37:56,724 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 17:37:56,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:37:56" (1/1) ... [2020-12-01 17:37:56,749 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:37:56" (1/1) ... [2020-12-01 17:37:56,773 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 17:37:56,774 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 17:37:56,775 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 17:37:56,776 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 17:37:56,787 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:37:56" (1/1) ... [2020-12-01 17:37:56,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:37:56" (1/1) ... [2020-12-01 17:37:56,801 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:37:56" (1/1) ... [2020-12-01 17:37:56,802 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:37:56" (1/1) ... [2020-12-01 17:37:56,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:37:56" (1/1) ... [2020-12-01 17:37:56,809 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:37:56" (1/1) ... [2020-12-01 17:37:56,810 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:37:56" (1/1) ... [2020-12-01 17:37:56,812 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 17:37:56,815 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 17:37:56,816 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 17:37:56,816 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 17:37:56,818 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:37:56" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4a9616a1-22de-429c-bb98-2923b4c9dc0e/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 [2020-12-01 17:37:56,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-01 17:37:56,923 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-12-01 17:37:56,923 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-12-01 17:37:56,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 17:37:56,925 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-12-01 17:37:56,925 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-12-01 17:37:56,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 17:37:56,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 17:37:57,369 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 17:37:57,370 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-01 17:37:57,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 05:37:57 BoogieIcfgContainer [2020-12-01 17:37:57,373 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 17:37:57,374 INFO L113 PluginConnector]: ------------------------CodeCheck---------------------------- [2020-12-01 17:37:57,375 INFO L271 PluginConnector]: Initializing CodeCheck... [2020-12-01 17:37:57,389 INFO L275 PluginConnector]: CodeCheck initialized [2020-12-01 17:37:57,389 INFO L185 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 05:37:57" (1/1) ... [2020-12-01 17:37:57,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 17:37:57,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 17:37:57,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 26 states and 33 transitions. [2020-12-01 17:37:57,453 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2020-12-01 17:37:57,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-01 17:37:57,459 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 17:37:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 17:37:57,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 17:37:57,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 17:37:57,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 30 states and 39 transitions. [2020-12-01 17:37:57,844 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2020-12-01 17:37:57,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-01 17:37:57,846 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 17:37:57,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 17:37:57,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 17:37:58,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 17:37:58,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 34 states and 46 transitions. [2020-12-01 17:37:58,209 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2020-12-01 17:37:58,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-01 17:37:58,211 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 17:37:58,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 17:37:58,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 17:37:58,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 17:37:58,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 36 states and 50 transitions. [2020-12-01 17:37:58,629 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 50 transitions. [2020-12-01 17:37:58,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-01 17:37:58,634 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 17:37:58,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 17:37:58,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 17:37:59,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 17:37:59,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 43 states and 66 transitions. [2020-12-01 17:37:59,992 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 66 transitions. [2020-12-01 17:38:00,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-01 17:38:00,004 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 17:38:00,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 17:38:00,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-01 17:38:00,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 17:38:00,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 45 states and 69 transitions. [2020-12-01 17:38:00,944 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 69 transitions. [2020-12-01 17:38:00,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-01 17:38:00,949 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 17:38:01,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 17:38:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-01 17:38:02,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 17:38:02,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 45 states and 66 transitions. [2020-12-01 17:38:02,541 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 66 transitions. [2020-12-01 17:38:02,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-01 17:38:02,545 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 17:38:02,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 17:38:02,904 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-01 17:38:04,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 17:38:04,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 57 states and 95 transitions. [2020-12-01 17:38:04,872 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 95 transitions. [2020-12-01 17:38:04,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-01 17:38:04,875 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 17:38:04,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 17:38:04,928 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-01 17:38:05,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 17:38:05,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 57 states and 94 transitions. [2020-12-01 17:38:05,252 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 94 transitions. [2020-12-01 17:38:05,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-01 17:38:05,255 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 17:38:05,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 17:38:05,877 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-01 17:38:08,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 17:38:08,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 62 states and 104 transitions. [2020-12-01 17:38:08,226 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 104 transitions. [2020-12-01 17:38:08,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-01 17:38:08,228 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 17:38:08,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 17:38:08,487 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 9 proven. 62 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-12-01 17:38:10,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 17:38:10,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 74 states and 132 transitions. [2020-12-01 17:38:10,626 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 132 transitions. [2020-12-01 17:38:10,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-01 17:38:10,630 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 17:38:10,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 17:38:10,773 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 98 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-12-01 17:38:11,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 17:38:11,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 76 states and 134 transitions. [2020-12-01 17:38:11,156 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 134 transitions. [2020-12-01 17:38:11,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-12-01 17:38:11,161 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 17:38:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 17:38:11,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 51 proven. 299 refuted. 0 times theorem prover too weak. 898 trivial. 0 not checked. [2020-12-01 17:38:13,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 17:38:13,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 86 states and 162 transitions. [2020-12-01 17:38:13,506 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 162 transitions. [2020-12-01 17:38:13,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-01 17:38:13,514 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 17:38:13,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 17:38:13,655 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 44 proven. 193 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2020-12-01 17:38:14,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 17:38:14,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 88 states and 164 transitions. [2020-12-01 17:38:14,096 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 164 transitions. [2020-12-01 17:38:14,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-12-01 17:38:14,102 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 17:38:14,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 17:38:14,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 51 proven. 299 refuted. 0 times theorem prover too weak. 898 trivial. 0 not checked. [2020-12-01 17:38:14,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 17:38:14,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 90 states and 166 transitions. [2020-12-01 17:38:14,671 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 166 transitions. [2020-12-01 17:38:14,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-01 17:38:14,676 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 17:38:14,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 17:38:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 100 proven. 23 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2020-12-01 17:38:15,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 17:38:15,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 90 states and 164 transitions. [2020-12-01 17:38:15,257 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 164 transitions. [2020-12-01 17:38:15,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-12-01 17:38:15,266 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 17:38:15,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 17:38:15,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1608 backedges. 248 proven. 103 refuted. 0 times theorem prover too weak. 1257 trivial. 0 not checked. [2020-12-01 17:38:18,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 17:38:18,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 88 states and 137 transitions. [2020-12-01 17:38:18,632 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 137 transitions. [2020-12-01 17:38:18,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-12-01 17:38:18,637 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 17:38:18,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 17:38:19,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 143 proven. 138 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2020-12-01 17:38:20,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 17:38:20,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 93 states and 146 transitions. [2020-12-01 17:38:20,307 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 146 transitions. [2020-12-01 17:38:20,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-12-01 17:38:20,312 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 17:38:20,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 17:38:20,359 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 17:38:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 17:38:20,416 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 17:38:20,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 17:38:20,597 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 17:38:20,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 17:38:20,655 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 17:38:21,791 WARN L483 CodeCheckObserver]: This program is UNSAFE, Check terminated with 18 iterations. [2020-12-01 17:38:21,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 01.12 05:38:21 ImpRootNode [2020-12-01 17:38:21,976 INFO L132 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2020-12-01 17:38:21,977 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 17:38:21,977 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 17:38:21,977 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 17:38:21,978 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 05:37:57" (3/4) ... [2020-12-01 17:38:21,980 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-01 17:38:22,213 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_4a9616a1-22de-429c-bb98-2923b4c9dc0e/bin/ukojak/witness.graphml [2020-12-01 17:38:22,229 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 17:38:22,231 INFO L168 Benchmark]: Toolchain (without parser) took 25864.27 ms. Allocated memory was 125.8 MB in the beginning and 383.8 MB in the end (delta: 257.9 MB). Free memory was 99.4 MB in the beginning and 222.5 MB in the end (delta: -123.1 MB). Peak memory consumption was 134.2 MB. Max. memory is 16.1 GB. [2020-12-01 17:38:22,232 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 88.1 MB. Free memory was 46.3 MB in the beginning and 46.3 MB in the end (delta: 78.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 17:38:22,232 INFO L168 Benchmark]: CACSL2BoogieTranslator took 349.29 ms. Allocated memory is still 125.8 MB. Free memory was 99.1 MB in the beginning and 103.5 MB in the end (delta: -4.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-01 17:38:22,232 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.61 ms. Allocated memory is still 125.8 MB. Free memory was 103.5 MB in the beginning and 102.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 17:38:22,233 INFO L168 Benchmark]: Boogie Preprocessor took 38.24 ms. Allocated memory is still 125.8 MB. Free memory was 102.2 MB in the beginning and 101.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 17:38:22,233 INFO L168 Benchmark]: RCFGBuilder took 558.16 ms. Allocated memory is still 125.8 MB. Free memory was 101.1 MB in the beginning and 86.8 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-01 17:38:22,233 INFO L168 Benchmark]: CodeCheck took 24601.60 ms. Allocated memory was 125.8 MB in the beginning and 383.8 MB in the end (delta: 257.9 MB). Free memory was 86.8 MB in the beginning and 232.9 MB in the end (delta: -146.1 MB). Peak memory consumption was 112.5 MB. Max. memory is 16.1 GB. [2020-12-01 17:38:22,234 INFO L168 Benchmark]: Witness Printer took 252.61 ms. Allocated memory is still 383.8 MB. Free memory was 232.9 MB in the beginning and 222.5 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-01 17:38:22,236 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: 24.3s, OverallIterations: 18, TraceHistogramMax: 0, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1991980 SDtfs, 733540 SDslu, 923672 SDs, 0 SdLazy, 4383508 SolverSat, 1491596 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10952 GetRequests, 10448 SyntacticMatches, 264 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24400 ImplicationChecksByTransitivity, 17.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, traceCheckStatistics: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 1790 NumberOfCodeBlocks, 1790 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 1600 ConstructedInterpolants, 0 QuantifiedInterpolants, 365760 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 2 PerfectInterpolantSequences, 5593/6857 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 = 6; [L39] CALL, EXPR fibo1(x) VAL [\old(n)=6] [L10] COND FALSE !(n < 1) VAL [\old(n)=6, n=6] [L12] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=5] [L20] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L22] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=4] [L10] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L12] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0, n=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=5, fibo1(n-1)=3, n=5] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=3] [L10] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L12] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0, n=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=5, fibo1(n-1)=3, fibo1(n-2)=2, n=5] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=6, fibo2(n-1)=5, n=6] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=4] [L20] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L22] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L10] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L12] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0, n=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=6, fibo2(n-1)=5, fibo2(n-2)=3, n=6] [L15] return fibo2(n-1) + fibo2(n-2); [L39] RET, EXPR fibo1(x) [L39] int result = fibo1(x); [L40] COND TRUE result == 8 [L4] __assert_fail("0", "fibo_2calls_6-2.c", 4, "reach_error") * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 88.1 MB. Free memory was 46.3 MB in the beginning and 46.3 MB in the end (delta: 78.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 349.29 ms. Allocated memory is still 125.8 MB. Free memory was 99.1 MB in the beginning and 103.5 MB in the end (delta: -4.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.61 ms. Allocated memory is still 125.8 MB. Free memory was 103.5 MB in the beginning and 102.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.24 ms. Allocated memory is still 125.8 MB. Free memory was 102.2 MB in the beginning and 101.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 558.16 ms. Allocated memory is still 125.8 MB. Free memory was 101.1 MB in the beginning and 86.8 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * CodeCheck took 24601.60 ms. Allocated memory was 125.8 MB in the beginning and 383.8 MB in the end (delta: 257.9 MB). Free memory was 86.8 MB in the beginning and 232.9 MB in the end (delta: -146.1 MB). Peak memory consumption was 112.5 MB. Max. memory is 16.1 GB. * Witness Printer took 252.61 ms. Allocated memory is still 383.8 MB. Free memory was 232.9 MB in the beginning and 222.5 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...