./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 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076152b2-6eb2-4910-a07e-8addb274f2ad/bin/ukojak-rkRKPMF4O4/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076152b2-6eb2-4910-a07e-8addb274f2ad/bin/ukojak-rkRKPMF4O4/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076152b2-6eb2-4910-a07e-8addb274f2ad/bin/ukojak-rkRKPMF4O4/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076152b2-6eb2-4910-a07e-8addb274f2ad/bin/ukojak-rkRKPMF4O4/config/KojakReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci04.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076152b2-6eb2-4910-a07e-8addb274f2ad/bin/ukojak-rkRKPMF4O4/config/svcomp-Reach-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076152b2-6eb2-4910-a07e-8addb274f2ad/bin/ukojak-rkRKPMF4O4 --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-2329fc7 [2022-12-14 18:23:50,509 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 18:23:50,510 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 18:23:50,527 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 18:23:50,527 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 18:23:50,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 18:23:50,529 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 18:23:50,530 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 18:23:50,532 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 18:23:50,533 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 18:23:50,533 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 18:23:50,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 18:23:50,535 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 18:23:50,536 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 18:23:50,537 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 18:23:50,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 18:23:50,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 18:23:50,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 18:23:50,541 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 18:23:50,542 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 18:23:50,544 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 18:23:50,545 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 18:23:50,546 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 18:23:50,547 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 18:23:50,550 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 18:23:50,550 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 18:23:50,550 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 18:23:50,551 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 18:23:50,551 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 18:23:50,552 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 18:23:50,553 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 18:23:50,553 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 18:23:50,554 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 18:23:50,554 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 18:23:50,555 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 18:23:50,555 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 18:23:50,556 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 18:23:50,556 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 18:23:50,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 18:23:50,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 18:23:50,558 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 18:23:50,558 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076152b2-6eb2-4910-a07e-8addb274f2ad/bin/ukojak-rkRKPMF4O4/config/svcomp-Reach-32bit-Kojak_Default.epf [2022-12-14 18:23:50,578 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 18:23:50,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 18:23:50,579 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 18:23:50,585 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2022-12-14 18:23:50,586 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 18:23:50,586 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 18:23:50,586 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 18:23:50,586 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 18:23:50,587 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 18:23:50,587 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 18:23:50,587 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 18:23:50,587 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 18:23:50,587 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 18:23:50,587 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 18:23:50,588 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 18:23:50,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 18:23:50,588 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 18:23:50,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 18:23:50,588 INFO L136 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2022-12-14 18:23:50,589 INFO L138 SettingsManager]: * Timeout in seconds=1000000 [2022-12-14 18:23:50,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 18:23:50,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2022-12-14 18:23:50,589 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 18:23:50,589 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 18:23:50,590 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 18:23:50,590 INFO L138 SettingsManager]: * Trace refinement strategy=PENGUIN [2022-12-14 18:23:50,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 18:23:50,590 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 18:23:50,590 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_076152b2-6eb2-4910-a07e-8addb274f2ad/bin/ukojak-rkRKPMF4O4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076152b2-6eb2-4910-a07e-8addb274f2ad/bin/ukojak-rkRKPMF4O4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d19306ce3d42a6a85ce0e73aaa2bade9eaab24620b40f9180d62be222dc7b30 [2022-12-14 18:23:50,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 18:23:50,809 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 18:23:50,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 18:23:50,812 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 18:23:50,813 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 18:23:50,814 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076152b2-6eb2-4910-a07e-8addb274f2ad/bin/ukojak-rkRKPMF4O4/../../sv-benchmarks/c/recursive/Fibonacci04.c [2022-12-14 18:23:53,392 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 18:23:53,530 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 18:23:53,531 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076152b2-6eb2-4910-a07e-8addb274f2ad/sv-benchmarks/c/recursive/Fibonacci04.c [2022-12-14 18:23:53,535 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076152b2-6eb2-4910-a07e-8addb274f2ad/bin/ukojak-rkRKPMF4O4/data/8ad495096/c27e3fbb5739479c98f257d55e2e4d5f/FLAG64061f774 [2022-12-14 18:23:53,546 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076152b2-6eb2-4910-a07e-8addb274f2ad/bin/ukojak-rkRKPMF4O4/data/8ad495096/c27e3fbb5739479c98f257d55e2e4d5f [2022-12-14 18:23:53,548 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 18:23:53,549 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 18:23:53,550 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 18:23:53,550 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 18:23:53,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 18:23:53,553 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:23:53" (1/1) ... [2022-12-14 18:23:53,553 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bd505b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:23:53, skipping insertion in model container [2022-12-14 18:23:53,553 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:23:53" (1/1) ... [2022-12-14 18:23:53,561 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 18:23:53,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 18:23:53,726 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_076152b2-6eb2-4910-a07e-8addb274f2ad/sv-benchmarks/c/recursive/Fibonacci04.c[780,793] [2022-12-14 18:23:53,730 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 18:23:53,741 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 18:23:53,755 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_076152b2-6eb2-4910-a07e-8addb274f2ad/sv-benchmarks/c/recursive/Fibonacci04.c[780,793] [2022-12-14 18:23:53,756 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 18:23:53,769 INFO L208 MainTranslator]: Completed translation [2022-12-14 18:23:53,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:23:53 WrapperNode [2022-12-14 18:23:53,770 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 18:23:53,771 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 18:23:53,771 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 18:23:53,771 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 18:23:53,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:23:53" (1/1) ... [2022-12-14 18:23:53,784 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:23:53" (1/1) ... [2022-12-14 18:23:53,796 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 23 [2022-12-14 18:23:53,796 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 18:23:53,797 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 18:23:53,797 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 18:23:53,797 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 18:23:53,804 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:23:53" (1/1) ... [2022-12-14 18:23:53,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:23:53" (1/1) ... [2022-12-14 18:23:53,805 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:23:53" (1/1) ... [2022-12-14 18:23:53,805 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:23:53" (1/1) ... [2022-12-14 18:23:53,808 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:23:53" (1/1) ... [2022-12-14 18:23:53,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:23:53" (1/1) ... [2022-12-14 18:23:53,811 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:23:53" (1/1) ... [2022-12-14 18:23:53,812 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:23:53" (1/1) ... [2022-12-14 18:23:53,813 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 18:23:53,814 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 18:23:53,814 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 18:23:53,815 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 18:23:53,815 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:23:53" (1/1) ... [2022-12-14 18:23:53,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2022-12-14 18:23:53,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076152b2-6eb2-4910-a07e-8addb274f2ad/bin/ukojak-rkRKPMF4O4/z3 [2022-12-14 18:23:53,840 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076152b2-6eb2-4910-a07e-8addb274f2ad/bin/ukojak-rkRKPMF4O4/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2022-12-14 18:23:53,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076152b2-6eb2-4910-a07e-8addb274f2ad/bin/ukojak-rkRKPMF4O4/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2022-12-14 18:23:53,872 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2022-12-14 18:23:53,872 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2022-12-14 18:23:53,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 18:23:53,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 18:23:53,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 18:23:53,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 18:23:53,925 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 18:23:53,927 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 18:23:54,001 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 18:23:54,011 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 18:23:54,012 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 18:23:54,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:23:54 BoogieIcfgContainer [2022-12-14 18:23:54,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 18:23:54,015 INFO L113 PluginConnector]: ------------------------CodeCheck---------------------------- [2022-12-14 18:23:54,015 INFO L271 PluginConnector]: Initializing CodeCheck... [2022-12-14 18:23:54,023 INFO L275 PluginConnector]: CodeCheck initialized [2022-12-14 18:23:54,023 INFO L185 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:23:54" (1/1) ... [2022-12-14 18:23:54,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 18:23:54,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-12-14 18:23:54,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 17 states and 21 transitions. [2022-12-14 18:23:54,074 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-12-14 18:23:54,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 18:23:54,078 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-12-14 18:23:54,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 18:23:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 18:23:54,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 18:23:54,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-12-14 18:23:54,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 21 states and 28 transitions. [2022-12-14 18:23:54,328 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2022-12-14 18:23:54,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 18:23:54,329 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-12-14 18:23:54,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 18:23:54,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 18:23:54,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 18:23:54,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-12-14 18:23:54,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 25 states and 35 transitions. [2022-12-14 18:23:54,537 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2022-12-14 18:23:54,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 18:23:54,538 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-12-14 18:23:54,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 18:23:54,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 18:23:54,634 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 18:23:54,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-12-14 18:23:54,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 25 states and 34 transitions. [2022-12-14 18:23:54,737 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2022-12-14 18:23:54,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 18:23:54,738 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-12-14 18:23:54,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 18:23:54,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 18:23:54,821 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 18:23:55,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-12-14 18:23:55,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 32 states and 49 transitions. [2022-12-14 18:23:55,026 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 49 transitions. [2022-12-14 18:23:55,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 18:23:55,028 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-12-14 18:23:55,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 18:23:55,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 18:23:55,188 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 18:23:55,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-12-14 18:23:55,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 35 states and 56 transitions. [2022-12-14 18:23:55,485 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 56 transitions. [2022-12-14 18:23:55,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 18:23:55,486 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-12-14 18:23:55,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 18:23:55,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 18:23:55,563 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 18:23:55,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-12-14 18:23:55,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 42 states and 74 transitions. [2022-12-14 18:23:55,758 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 74 transitions. [2022-12-14 18:23:55,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 18:23:55,760 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-12-14 18:23:55,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 18:23:55,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 18:23:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 47 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 18:23:56,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-12-14 18:23:56,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 42 states and 73 transitions. [2022-12-14 18:23:56,138 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 73 transitions. [2022-12-14 18:23:56,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-14 18:23:56,141 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-12-14 18:23:56,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 18:23:56,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 18:23:56,268 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 127 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-12-14 18:23:56,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-12-14 18:23:56,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 49 states and 93 transitions. [2022-12-14 18:23:56,551 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 93 transitions. [2022-12-14 18:23:56,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-12-14 18:23:56,553 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-12-14 18:23:56,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 18:23:56,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 18:23:56,775 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 145 proven. 154 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2022-12-14 18:23:57,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-12-14 18:23:57,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 53 states and 78 transitions. [2022-12-14 18:23:57,417 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 78 transitions. [2022-12-14 18:23:57,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-12-14 18:23:57,420 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-12-14 18:23:57,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 18:23:57,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 18:23:57,565 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 212 proven. 59 refuted. 0 times theorem prover too weak. 662 trivial. 0 not checked. [2022-12-14 18:23:57,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-12-14 18:23:57,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 53 states and 75 transitions. [2022-12-14 18:23:57,715 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 75 transitions. [2022-12-14 18:23:57,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-12-14 18:23:57,716 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-12-14 18:23:57,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 18:23:57,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 18:23:57,786 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 118 proven. 34 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2022-12-14 18:23:57,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-12-14 18:23:57,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 53 states and 74 transitions. [2022-12-14 18:23:57,939 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 74 transitions. [2022-12-14 18:23:57,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-12-14 18:23:57,941 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-12-14 18:23:57,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 18:23:57,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 18:23:57,957 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 18:23:57,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 18:23:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 18:23:58,031 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 18:23:58,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 18:23:58,068 WARN L475 CodeCheckObserver]: This program is UNSAFE, Check terminated with 12 iterations. [2022-12-14 18:23:58,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 14.12 06:23:58 ImpRootNode [2022-12-14 18:23:58,108 INFO L132 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2022-12-14 18:23:58,109 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 18:23:58,109 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 18:23:58,109 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 18:23:58,109 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:23:54" (3/4) ... [2022-12-14 18:23:58,111 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-14 18:23:58,170 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076152b2-6eb2-4910-a07e-8addb274f2ad/bin/ukojak-rkRKPMF4O4/witness.graphml [2022-12-14 18:23:58,170 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 18:23:58,170 INFO L158 Benchmark]: Toolchain (without parser) took 4621.49ms. Allocated memory was 134.2MB in the beginning and 163.6MB in the end (delta: 29.4MB). Free memory was 91.1MB in the beginning and 84.9MB in the end (delta: 6.2MB). Peak memory consumption was 38.4MB. Max. memory is 16.1GB. [2022-12-14 18:23:58,170 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 134.2MB. Free memory is still 102.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 18:23:58,171 INFO L158 Benchmark]: CACSL2BoogieTranslator took 220.42ms. Allocated memory is still 134.2MB. Free memory was 90.9MB in the beginning and 81.1MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 18:23:58,171 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.69ms. Allocated memory is still 134.2MB. Free memory was 80.9MB in the beginning and 79.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 18:23:58,172 INFO L158 Benchmark]: Boogie Preprocessor took 16.45ms. Allocated memory is still 134.2MB. Free memory was 79.5MB in the beginning and 78.6MB in the end (delta: 913.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 18:23:58,172 INFO L158 Benchmark]: RCFGBuilder took 199.76ms. Allocated memory is still 134.2MB. Free memory was 78.4MB in the beginning and 68.5MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 18:23:58,172 INFO L158 Benchmark]: CodeCheck took 4093.68ms. Allocated memory was 134.2MB in the beginning and 163.6MB in the end (delta: 29.4MB). Free memory was 68.3MB in the beginning and 88.1MB in the end (delta: -19.8MB). Peak memory consumption was 11.2MB. Max. memory is 16.1GB. [2022-12-14 18:23:58,172 INFO L158 Benchmark]: Witness Printer took 61.13ms. Allocated memory is still 163.6MB. Free memory was 88.1MB in the beginning and 84.9MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-12-14 18:23:58,175 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: 4.0s, OverallIterations: 12, TraceHistogramMax: 0, PathProgramHistogramMax: 0, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 977 SdHoareTripleChecker+Valid, 2.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 408 mSDsluCounter, 912 SdHoareTripleChecker+Invalid, 1.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 645 mSDsCounter, 640 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1970 IncrementalHoareTripleChecker+Invalid, 2610 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 640 mSolverCounterUnsat, 267 mSDtfsCounter, 1970 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3797 GetRequests, 3654 SyntacticMatches, 27 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6295 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 713 NumberOfCodeBlocks, 713 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 597 ConstructedInterpolants, 0 QuantifiedInterpolants, 1132 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 2183/2626 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 0.16ms. Allocated memory is still 134.2MB. Free memory is still 102.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 220.42ms. Allocated memory is still 134.2MB. Free memory was 90.9MB in the beginning and 81.1MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.69ms. Allocated memory is still 134.2MB. Free memory was 80.9MB in the beginning and 79.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 16.45ms. Allocated memory is still 134.2MB. Free memory was 79.5MB in the beginning and 78.6MB in the end (delta: 913.0kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 199.76ms. Allocated memory is still 134.2MB. Free memory was 78.4MB in the beginning and 68.5MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * CodeCheck took 4093.68ms. Allocated memory was 134.2MB in the beginning and 163.6MB in the end (delta: 29.4MB). Free memory was 68.3MB in the beginning and 88.1MB in the end (delta: -19.8MB). Peak memory consumption was 11.2MB. Max. memory is 16.1GB. * Witness Printer took 61.13ms. Allocated memory is still 163.6MB. Free memory was 88.1MB in the beginning and 84.9MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. RESULT: Ultimate proved your program to be incorrect! [2022-12-14 18:23:58,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076152b2-6eb2-4910-a07e-8addb274f2ad/bin/ukojak-rkRKPMF4O4/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Forceful destruction successful, 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