./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Fibonacci04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b06570fb-b3b2-4cff-9dae-baf242185aea/bin/ukojak-pZX7IvK2PQ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b06570fb-b3b2-4cff-9dae-baf242185aea/bin/ukojak-pZX7IvK2PQ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b06570fb-b3b2-4cff-9dae-baf242185aea/bin/ukojak-pZX7IvK2PQ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b06570fb-b3b2-4cff-9dae-baf242185aea/bin/ukojak-pZX7IvK2PQ/config/KojakReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci04.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b06570fb-b3b2-4cff-9dae-baf242185aea/bin/ukojak-pZX7IvK2PQ/config/svcomp-Reach-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b06570fb-b3b2-4cff-9dae-baf242185aea/bin/ukojak-pZX7IvK2PQ --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 8d19306ce3d42a6a85ce0e73aaa2bade9eaab24620b40f9180d62be222dc7b30 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 16:27:29,026 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 16:27:29,029 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 16:27:29,056 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 16:27:29,058 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 16:27:29,059 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 16:27:29,061 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 16:27:29,062 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 16:27:29,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 16:27:29,065 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 16:27:29,066 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 16:27:29,067 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 16:27:29,067 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 16:27:29,069 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 16:27:29,070 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 16:27:29,078 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 16:27:29,080 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 16:27:29,087 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 16:27:29,089 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 16:27:29,091 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 16:27:29,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 16:27:29,098 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 16:27:29,101 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 16:27:29,102 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 16:27:29,112 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 16:27:29,112 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 16:27:29,113 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 16:27:29,114 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 16:27:29,114 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 16:27:29,115 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 16:27:29,115 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 16:27:29,116 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 16:27:29,117 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 16:27:29,118 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 16:27:29,119 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 16:27:29,119 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 16:27:29,120 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 16:27:29,120 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 16:27:29,121 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 16:27:29,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 16:27:29,125 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 16:27:29,126 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b06570fb-b3b2-4cff-9dae-baf242185aea/bin/ukojak-pZX7IvK2PQ/config/svcomp-Reach-32bit-Kojak_Default.epf [2022-11-20 16:27:29,148 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 16:27:29,148 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 16:27:29,149 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 16:27:29,149 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2022-11-20 16:27:29,150 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 16:27:29,150 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 16:27:29,151 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 16:27:29,151 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 16:27:29,151 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 16:27:29,151 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 16:27:29,152 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 16:27:29,152 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 16:27:29,152 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 16:27:29,152 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 16:27:29,153 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 16:27:29,153 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 16:27:29,153 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 16:27:29,153 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 16:27:29,154 INFO L136 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2022-11-20 16:27:29,154 INFO L138 SettingsManager]: * Timeout in seconds=1000000 [2022-11-20 16:27:29,154 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 16:27:29,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2022-11-20 16:27:29,155 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 16:27:29,155 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 16:27:29,155 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 16:27:29,156 INFO L138 SettingsManager]: * Trace refinement strategy=PENGUIN [2022-11-20 16:27:29,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 16:27:29,156 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 16:27:29,156 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_worker_vcloud-master_on_vcloud-master/run_dir_b06570fb-b3b2-4cff-9dae-baf242185aea/bin/ukojak-pZX7IvK2PQ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b06570fb-b3b2-4cff-9dae-baf242185aea/bin/ukojak-pZX7IvK2PQ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d19306ce3d42a6a85ce0e73aaa2bade9eaab24620b40f9180d62be222dc7b30 [2022-11-20 16:27:29,414 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 16:27:29,451 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 16:27:29,454 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 16:27:29,455 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 16:27:29,456 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 16:27:29,459 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b06570fb-b3b2-4cff-9dae-baf242185aea/bin/ukojak-pZX7IvK2PQ/../../sv-benchmarks/c/recursive/Fibonacci04.c [2022-11-20 16:27:32,690 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 16:27:32,877 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 16:27:32,878 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b06570fb-b3b2-4cff-9dae-baf242185aea/sv-benchmarks/c/recursive/Fibonacci04.c [2022-11-20 16:27:32,884 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b06570fb-b3b2-4cff-9dae-baf242185aea/bin/ukojak-pZX7IvK2PQ/data/b371744ad/bb93e1b235074cb185f6de5db8d9a024/FLAG0fee63eea [2022-11-20 16:27:32,897 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b06570fb-b3b2-4cff-9dae-baf242185aea/bin/ukojak-pZX7IvK2PQ/data/b371744ad/bb93e1b235074cb185f6de5db8d9a024 [2022-11-20 16:27:32,900 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 16:27:32,901 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 16:27:32,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 16:27:32,902 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 16:27:32,906 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 16:27:32,907 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 04:27:32" (1/1) ... [2022-11-20 16:27:32,908 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26a936f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:27:32, skipping insertion in model container [2022-11-20 16:27:32,908 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 04:27:32" (1/1) ... [2022-11-20 16:27:32,915 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 16:27:32,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 16:27:33,081 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b06570fb-b3b2-4cff-9dae-baf242185aea/sv-benchmarks/c/recursive/Fibonacci04.c[780,793] [2022-11-20 16:27:33,085 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 16:27:33,096 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 16:27:33,110 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b06570fb-b3b2-4cff-9dae-baf242185aea/sv-benchmarks/c/recursive/Fibonacci04.c[780,793] [2022-11-20 16:27:33,111 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 16:27:33,124 INFO L208 MainTranslator]: Completed translation [2022-11-20 16:27:33,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:27:33 WrapperNode [2022-11-20 16:27:33,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 16:27:33,126 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 16:27:33,126 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 16:27:33,126 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 16:27:33,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:27:33" (1/1) ... [2022-11-20 16:27:33,140 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:27:33" (1/1) ... [2022-11-20 16:27:33,156 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 23 [2022-11-20 16:27:33,156 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 16:27:33,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 16:27:33,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 16:27:33,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 16:27:33,166 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:27:33" (1/1) ... [2022-11-20 16:27:33,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:27:33" (1/1) ... [2022-11-20 16:27:33,168 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:27:33" (1/1) ... [2022-11-20 16:27:33,169 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:27:33" (1/1) ... [2022-11-20 16:27:33,175 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:27:33" (1/1) ... [2022-11-20 16:27:33,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:27:33" (1/1) ... [2022-11-20 16:27:33,179 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:27:33" (1/1) ... [2022-11-20 16:27:33,180 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:27:33" (1/1) ... [2022-11-20 16:27:33,183 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 16:27:33,184 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 16:27:33,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 16:27:33,185 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 16:27:33,186 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:27:33" (1/1) ... [2022-11-20 16:27:33,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2022-11-20 16:27:33,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b06570fb-b3b2-4cff-9dae-baf242185aea/bin/ukojak-pZX7IvK2PQ/z3 [2022-11-20 16:27:33,228 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b06570fb-b3b2-4cff-9dae-baf242185aea/bin/ukojak-pZX7IvK2PQ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2022-11-20 16:27:33,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b06570fb-b3b2-4cff-9dae-baf242185aea/bin/ukojak-pZX7IvK2PQ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2022-11-20 16:27:33,279 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2022-11-20 16:27:33,279 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2022-11-20 16:27:33,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 16:27:33,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 16:27:33,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 16:27:33,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 16:27:33,349 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 16:27:33,352 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 16:27:33,462 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 16:27:33,479 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 16:27:33,479 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-20 16:27:33,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:27:33 BoogieIcfgContainer [2022-11-20 16:27:33,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 16:27:33,483 INFO L113 PluginConnector]: ------------------------CodeCheck---------------------------- [2022-11-20 16:27:33,483 INFO L271 PluginConnector]: Initializing CodeCheck... [2022-11-20 16:27:33,499 INFO L275 PluginConnector]: CodeCheck initialized [2022-11-20 16:27:33,499 INFO L185 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:27:33" (1/1) ... [2022-11-20 16:27:33,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:27:33,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-11-20 16:27:33,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 17 states and 21 transitions. [2022-11-20 16:27:33,586 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-20 16:27:33,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 16:27:33,591 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-11-20 16:27:33,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:27:33,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:27:33,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 16:27:33,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-11-20 16:27:33,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 21 states and 28 transitions. [2022-11-20 16:27:33,927 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2022-11-20 16:27:33,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 16:27:33,928 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-11-20 16:27:33,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:27:33,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:27:34,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 16:27:34,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-11-20 16:27:34,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 25 states and 35 transitions. [2022-11-20 16:27:34,271 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2022-11-20 16:27:34,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 16:27:34,286 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-11-20 16:27:34,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:27:34,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:27:34,511 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 16:27:34,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-11-20 16:27:34,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 25 states and 34 transitions. [2022-11-20 16:27:34,712 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2022-11-20 16:27:34,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 16:27:34,714 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-11-20 16:27:34,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:27:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:27:34,908 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 16:27:35,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-11-20 16:27:35,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 32 states and 49 transitions. [2022-11-20 16:27:35,305 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 49 transitions. [2022-11-20 16:27:35,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 16:27:35,307 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-11-20 16:27:35,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:27:35,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:27:35,663 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 16:27:36,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-11-20 16:27:36,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 35 states and 56 transitions. [2022-11-20 16:27:36,231 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 56 transitions. [2022-11-20 16:27:36,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 16:27:36,233 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-11-20 16:27:36,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:27:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:27:36,366 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 16:27:36,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-11-20 16:27:36,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 42 states and 74 transitions. [2022-11-20 16:27:36,770 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 74 transitions. [2022-11-20 16:27:36,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 16:27:36,772 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-11-20 16:27:36,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:27:36,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:27:37,031 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 47 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 16:27:37,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-11-20 16:27:37,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 42 states and 73 transitions. [2022-11-20 16:27:37,421 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 73 transitions. [2022-11-20 16:27:37,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-20 16:27:37,423 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-11-20 16:27:37,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:27:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:27:37,633 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-20 16:27:38,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-11-20 16:27:38,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 49 states and 93 transitions. [2022-11-20 16:27:38,082 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 93 transitions. [2022-11-20 16:27:38,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-20 16:27:38,096 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-11-20 16:27:38,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:27:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:27:38,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1403 backedges. 260 proven. 83 refuted. 0 times theorem prover too weak. 1060 trivial. 0 not checked. [2022-11-20 16:27:39,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-11-20 16:27:39,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 51 states and 77 transitions. [2022-11-20 16:27:39,477 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 77 transitions. [2022-11-20 16:27:39,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-20 16:27:39,479 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-11-20 16:27:39,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:27:39,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:27:39,787 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 145 proven. 154 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2022-11-20 16:27:40,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-11-20 16:27:40,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 53 states and 75 transitions. [2022-11-20 16:27:40,186 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 75 transitions. [2022-11-20 16:27:40,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-20 16:27:40,188 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-11-20 16:27:40,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:27:40,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 16:27:40,219 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 16:27:40,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 16:27:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 16:27:40,346 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 16:27:40,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 16:27:40,433 WARN L475 CodeCheckObserver]: This program is UNSAFE, Check terminated with 11 iterations. [2022-11-20 16:27:40,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 20.11 04:27:40 ImpRootNode [2022-11-20 16:27:40,477 INFO L132 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2022-11-20 16:27:40,477 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-20 16:27:40,477 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-20 16:27:40,478 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-20 16:27:40,478 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:27:33" (3/4) ... [2022-11-20 16:27:40,480 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-20 16:27:40,554 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b06570fb-b3b2-4cff-9dae-baf242185aea/bin/ukojak-pZX7IvK2PQ/witness.graphml [2022-11-20 16:27:40,554 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-20 16:27:40,555 INFO L158 Benchmark]: Toolchain (without parser) took 7653.89ms. Allocated memory was 140.5MB in the beginning and 213.9MB in the end (delta: 73.4MB). Free memory was 97.0MB in the beginning and 82.2MB in the end (delta: 14.9MB). Peak memory consumption was 90.4MB. Max. memory is 16.1GB. [2022-11-20 16:27:40,556 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 140.5MB. Free memory is still 81.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 16:27:40,556 INFO L158 Benchmark]: CACSL2BoogieTranslator took 222.86ms. Allocated memory is still 140.5MB. Free memory was 97.0MB in the beginning and 87.1MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 16:27:40,557 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.49ms. Allocated memory is still 140.5MB. Free memory was 87.1MB in the beginning and 85.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 16:27:40,558 INFO L158 Benchmark]: Boogie Preprocessor took 26.58ms. Allocated memory is still 140.5MB. Free memory was 85.5MB in the beginning and 84.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 16:27:40,558 INFO L158 Benchmark]: RCFGBuilder took 297.64ms. Allocated memory is still 140.5MB. Free memory was 84.5MB in the beginning and 74.5MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 16:27:40,559 INFO L158 Benchmark]: CodeCheck took 6994.09ms. Allocated memory was 140.5MB in the beginning and 213.9MB in the end (delta: 73.4MB). Free memory was 74.0MB in the beginning and 85.3MB in the end (delta: -11.3MB). Peak memory consumption was 65.2MB. Max. memory is 16.1GB. [2022-11-20 16:27:40,560 INFO L158 Benchmark]: Witness Printer took 76.97ms. Allocated memory is still 213.9MB. Free memory was 85.3MB in the beginning and 82.2MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 16:27:40,564 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 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.9s, OverallIterations: 11, TraceHistogramMax: 0, PathProgramHistogramMax: 0, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 819 SdHoareTripleChecker+Valid, 3.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 338 mSDsluCounter, 758 SdHoareTripleChecker+Invalid, 2.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 532 mSDsCounter, 510 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1618 IncrementalHoareTripleChecker+Invalid, 2128 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 510 mSolverCounterUnsat, 226 mSDtfsCounter, 1618 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3314 GetRequests, 3173 SyntacticMatches, 27 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6067 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 636 NumberOfCodeBlocks, 636 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 521 ConstructedInterpolants, 0 QuantifiedInterpolants, 1012 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 2178/2572 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: 35]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L30] int x = __VERIFIER_nondet_int(); [L31] CALL, EXPR fibonacci(x) VAL [\old(n)=5] [L19] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L21] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L24] CALL, EXPR fibonacci(n-1) VAL [\old(n)=4] [L19] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L21] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L24] CALL, EXPR fibonacci(n-1) VAL [\old(n)=3] [L19] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L21] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L24] CALL, EXPR fibonacci(n-1) VAL [\old(n)=2] [L19] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L21] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L24] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L19] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L21] COND TRUE n == 1 [L22] return 1; VAL [\old(n)=1, \result=1, n=1] [L24] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L24] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L19] COND TRUE n < 1 [L20] return 0; VAL [\old(n)=0, \result=0, n=0] [L24] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L24] return fibonacci(n-1) + fibonacci(n-2); [L24] RET, EXPR fibonacci(n-1) VAL [\old(n)=3, fibonacci(n-1)=1, n=3] [L24] CALL, EXPR fibonacci(n-2) VAL [\old(n)=1] [L19] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L21] COND TRUE n == 1 [L22] return 1; VAL [\old(n)=1, \result=1, n=1] [L24] RET, EXPR fibonacci(n-2) VAL [\old(n)=3, fibonacci(n-1)=1, fibonacci(n-2)=1, n=3] [L24] return fibonacci(n-1) + fibonacci(n-2); [L24] RET, EXPR fibonacci(n-1) VAL [\old(n)=4, fibonacci(n-1)=2, n=4] [L24] CALL, EXPR fibonacci(n-2) VAL [\old(n)=2] [L19] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L21] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L24] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L19] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L21] COND TRUE n == 1 [L22] return 1; VAL [\old(n)=1, \result=1, n=1] [L24] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L24] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L19] COND TRUE n < 1 [L20] return 0; VAL [\old(n)=0, \result=0, n=0] [L24] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L24] return fibonacci(n-1) + fibonacci(n-2); [L24] RET, EXPR fibonacci(n-2) VAL [\old(n)=4, fibonacci(n-1)=2, fibonacci(n-2)=1, n=4] [L24] return fibonacci(n-1) + fibonacci(n-2); [L24] RET, EXPR fibonacci(n-1) VAL [\old(n)=5, fibonacci(n-1)=3, n=5] [L24] CALL, EXPR fibonacci(n-2) VAL [\old(n)=3] [L19] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L21] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L24] CALL, EXPR fibonacci(n-1) VAL [\old(n)=2] [L19] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L21] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L24] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L19] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L21] COND TRUE n == 1 [L22] return 1; VAL [\old(n)=1, \result=1, n=1] [L24] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L24] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L19] COND TRUE n < 1 [L20] return 0; VAL [\old(n)=0, \result=0, n=0] [L24] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L24] return fibonacci(n-1) + fibonacci(n-2); [L24] RET, EXPR fibonacci(n-1) VAL [\old(n)=3, fibonacci(n-1)=1, n=3] [L24] CALL, EXPR fibonacci(n-2) VAL [\old(n)=1] [L19] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L21] COND TRUE n == 1 [L22] return 1; VAL [\old(n)=1, \result=1, n=1] [L24] RET, EXPR fibonacci(n-2) VAL [\old(n)=3, fibonacci(n-1)=1, fibonacci(n-2)=1, n=3] [L24] return fibonacci(n-1) + fibonacci(n-2); [L24] RET, EXPR fibonacci(n-2) VAL [\old(n)=5, fibonacci(n-1)=3, fibonacci(n-2)=2, n=5] [L24] return fibonacci(n-1) + fibonacci(n-2); [L31] RET, EXPR fibonacci(x) VAL [fibonacci(x)=5, x=5] [L31] int result = fibonacci(x); [L32] COND FALSE !(x != 5 || result == 3) VAL [result=5, x=5] [L35] reach_error() VAL [result=5, x=5] * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 140.5MB. Free memory is still 81.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 222.86ms. Allocated memory is still 140.5MB. Free memory was 97.0MB in the beginning and 87.1MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.49ms. Allocated memory is still 140.5MB. Free memory was 87.1MB in the beginning and 85.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.58ms. Allocated memory is still 140.5MB. Free memory was 85.5MB in the beginning and 84.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 297.64ms. Allocated memory is still 140.5MB. Free memory was 84.5MB in the beginning and 74.5MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * CodeCheck took 6994.09ms. Allocated memory was 140.5MB in the beginning and 213.9MB in the end (delta: 73.4MB). Free memory was 74.0MB in the beginning and 85.3MB in the end (delta: -11.3MB). Peak memory consumption was 65.2MB. Max. memory is 16.1GB. * Witness Printer took 76.97ms. Allocated memory is still 213.9MB. Free memory was 85.3MB in the beginning and 82.2MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. RESULT: Ultimate proved your program to be incorrect! [2022-11-20 16:27:40,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b06570fb-b3b2-4cff-9dae-baf242185aea/bin/ukojak-pZX7IvK2PQ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE