./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f2619e6-6fd4-4001-9460-1200622e7510/bin/ukojak-verify-CZk0znPC7b/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f2619e6-6fd4-4001-9460-1200622e7510/bin/ukojak-verify-CZk0znPC7b/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f2619e6-6fd4-4001-9460-1200622e7510/bin/ukojak-verify-CZk0znPC7b/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f2619e6-6fd4-4001-9460-1200622e7510/bin/ukojak-verify-CZk0znPC7b/config/KojakReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f2619e6-6fd4-4001-9460-1200622e7510/bin/ukojak-verify-CZk0znPC7b/config/svcomp-Reach-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f2619e6-6fd4-4001-9460-1200622e7510/bin/ukojak-verify-CZk0znPC7b --witnessprinter.witness.filename witness --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 eb57cc67b4a5d1052a722feccb00a81098424cf4bc0bbd7bfe756405ab740d43 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-06 03:15:01,263 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-06 03:15:01,314 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f2619e6-6fd4-4001-9460-1200622e7510/bin/ukojak-verify-CZk0znPC7b/config/svcomp-Reach-32bit-Kojak_Default.epf [2024-12-06 03:15:01,318 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-06 03:15:01,318 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck.Interpolating solver [2024-12-06 03:15:01,337 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-06 03:15:01,338 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-06 03:15:01,338 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2024-12-06 03:15:01,338 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-06 03:15:01,338 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-06 03:15:01,339 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-06 03:15:01,339 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-12-06 03:15:01,339 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-06 03:15:01,339 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-06 03:15:01,339 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-06 03:15:01,339 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-06 03:15:01,339 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-12-06 03:15:01,339 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-06 03:15:01,339 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-12-06 03:15:01,339 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-06 03:15:01,340 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-12-06 03:15:01,340 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-06 03:15:01,340 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-06 03:15:01,340 INFO L151 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2024-12-06 03:15:01,340 INFO L153 SettingsManager]: * Timeout in seconds=1000000 [2024-12-06 03:15:01,340 INFO L153 SettingsManager]: * Theory for external solver=ALL [2024-12-06 03:15:01,340 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-06 03:15:01,340 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2024-12-06 03:15:01,340 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-06 03:15:01,340 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-06 03:15:01,341 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-12-06 03:15:01,341 INFO L153 SettingsManager]: * Trace refinement strategy=PENGUIN [2024-12-06 03:15:01,341 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-06 03:15:01,341 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f2619e6-6fd4-4001-9460-1200622e7510/bin/ukojak-verify-CZk0znPC7b Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness 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 -> eb57cc67b4a5d1052a722feccb00a81098424cf4bc0bbd7bfe756405ab740d43 [2024-12-06 03:15:01,548 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-06 03:15:01,555 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-06 03:15:01,557 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-06 03:15:01,558 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-06 03:15:01,558 INFO L274 PluginConnector]: CDTParser initialized [2024-12-06 03:15:01,559 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f2619e6-6fd4-4001-9460-1200622e7510/bin/ukojak-verify-CZk0znPC7b/../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c [2024-12-06 03:15:04,155 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f2619e6-6fd4-4001-9460-1200622e7510/bin/ukojak-verify-CZk0znPC7b/data/c63db61a6/01ae3d66d1824c99b00e4afd4d72e2b2/FLAG7f2acb5c9 [2024-12-06 03:15:04,371 INFO L384 CDTParser]: Found 1 translation units. [2024-12-06 03:15:04,372 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f2619e6-6fd4-4001-9460-1200622e7510/sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c [2024-12-06 03:15:04,379 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f2619e6-6fd4-4001-9460-1200622e7510/bin/ukojak-verify-CZk0znPC7b/data/c63db61a6/01ae3d66d1824c99b00e4afd4d72e2b2/FLAG7f2acb5c9 [2024-12-06 03:15:04,393 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f2619e6-6fd4-4001-9460-1200622e7510/bin/ukojak-verify-CZk0znPC7b/data/c63db61a6/01ae3d66d1824c99b00e4afd4d72e2b2 [2024-12-06 03:15:04,395 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-06 03:15:04,397 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-06 03:15:04,398 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-06 03:15:04,398 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-06 03:15:04,403 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-06 03:15:04,403 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 03:15:04" (1/1) ... [2024-12-06 03:15:04,404 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30b166a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 03:15:04, skipping insertion in model container [2024-12-06 03:15:04,404 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 03:15:04" (1/1) ... [2024-12-06 03:15:04,418 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-06 03:15:04,557 WARN L250 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_0f2619e6-6fd4-4001-9460-1200622e7510/sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c[946,959] [2024-12-06 03:15:04,560 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-06 03:15:04,571 INFO L200 MainTranslator]: Completed pre-run [2024-12-06 03:15:04,584 WARN L250 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_0f2619e6-6fd4-4001-9460-1200622e7510/sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c[946,959] [2024-12-06 03:15:04,585 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-06 03:15:04,598 INFO L204 MainTranslator]: Completed translation [2024-12-06 03:15:04,598 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 03:15:04 WrapperNode [2024-12-06 03:15:04,598 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-06 03:15:04,599 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-06 03:15:04,599 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-06 03:15:04,599 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-06 03:15:04,606 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 03:15:04" (1/1) ... [2024-12-06 03:15:04,611 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 03:15:04" (1/1) ... [2024-12-06 03:15:04,624 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2024-12-06 03:15:04,625 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-06 03:15:04,625 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-06 03:15:04,625 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-06 03:15:04,625 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-06 03:15:04,632 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 03:15:04" (1/1) ... [2024-12-06 03:15:04,632 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 03:15:04" (1/1) ... [2024-12-06 03:15:04,633 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 03:15:04" (1/1) ... [2024-12-06 03:15:04,633 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 03:15:04" (1/1) ... [2024-12-06 03:15:04,635 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 03:15:04" (1/1) ... [2024-12-06 03:15:04,636 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 03:15:04" (1/1) ... [2024-12-06 03:15:04,638 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 03:15:04" (1/1) ... [2024-12-06 03:15:04,639 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 03:15:04" (1/1) ... [2024-12-06 03:15:04,639 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 03:15:04" (1/1) ... [2024-12-06 03:15:04,641 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-06 03:15:04,641 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-06 03:15:04,642 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-06 03:15:04,642 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-06 03:15:04,643 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 03:15:04" (1/1) ... [2024-12-06 03:15:04,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2024-12-06 03:15:04,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f2619e6-6fd4-4001-9460-1200622e7510/bin/ukojak-verify-CZk0znPC7b/z3 [2024-12-06 03:15:04,672 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f2619e6-6fd4-4001-9460-1200622e7510/bin/ukojak-verify-CZk0znPC7b/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2024-12-06 03:15:04,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f2619e6-6fd4-4001-9460-1200622e7510/bin/ukojak-verify-CZk0znPC7b/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2024-12-06 03:15:04,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-06 03:15:04,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-12-06 03:15:04,701 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2024-12-06 03:15:04,701 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2024-12-06 03:15:04,701 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2024-12-06 03:15:04,701 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2024-12-06 03:15:04,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-06 03:15:04,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-06 03:15:04,757 INFO L234 CfgBuilder]: Building ICFG [2024-12-06 03:15:04,759 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-06 03:15:04,864 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-12-06 03:15:04,864 INFO L283 CfgBuilder]: Performing block encoding [2024-12-06 03:15:04,881 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-06 03:15:04,881 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2024-12-06 03:15:04,882 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 03:15:04 BoogieIcfgContainer [2024-12-06 03:15:04,882 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-06 03:15:04,882 INFO L112 PluginConnector]: ------------------------CodeCheck---------------------------- [2024-12-06 03:15:04,882 INFO L270 PluginConnector]: Initializing CodeCheck... [2024-12-06 03:15:04,891 INFO L274 PluginConnector]: CodeCheck initialized [2024-12-06 03:15:04,891 INFO L184 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 03:15:04" (1/1) ... [2024-12-06 03:15:04,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-06 03:15:04,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-12-06 03:15:04,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 26 states and 33 transitions. [2024-12-06 03:15:04,947 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2024-12-06 03:15:04,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-12-06 03:15:04,951 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-12-06 03:15:04,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-06 03:15:05,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-06 03:15:05,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-06 03:15:05,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-12-06 03:15:05,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 30 states and 39 transitions. [2024-12-06 03:15:05,196 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2024-12-06 03:15:05,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-12-06 03:15:05,197 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-12-06 03:15:05,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-06 03:15:05,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-06 03:15:05,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-06 03:15:05,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-12-06 03:15:05,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 34 states and 46 transitions. [2024-12-06 03:15:05,459 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2024-12-06 03:15:05,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-12-06 03:15:05,460 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-12-06 03:15:05,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-06 03:15:05,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-06 03:15:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-06 03:15:05,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-12-06 03:15:05,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 36 states and 50 transitions. [2024-12-06 03:15:05,733 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 50 transitions. [2024-12-06 03:15:05,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-12-06 03:15:05,734 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-12-06 03:15:05,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-06 03:15:05,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-06 03:15:05,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-06 03:15:06,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-12-06 03:15:06,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 43 states and 66 transitions. [2024-12-06 03:15:06,416 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 66 transitions. [2024-12-06 03:15:06,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-12-06 03:15:06,417 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-12-06 03:15:06,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-06 03:15:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-06 03:15:06,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-06 03:15:06,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-12-06 03:15:06,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 45 states and 69 transitions. [2024-12-06 03:15:06,921 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 69 transitions. [2024-12-06 03:15:06,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-12-06 03:15:06,922 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-12-06 03:15:06,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-06 03:15:06,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-06 03:15:07,190 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-06 03:15:07,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-12-06 03:15:07,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 45 states and 66 transitions. [2024-12-06 03:15:07,827 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 66 transitions. [2024-12-06 03:15:07,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-12-06 03:15:07,829 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-12-06 03:15:07,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-06 03:15:07,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-06 03:15:08,012 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-06 03:15:09,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-12-06 03:15:09,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 57 states and 95 transitions. [2024-12-06 03:15:09,144 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 95 transitions. [2024-12-06 03:15:09,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-12-06 03:15:09,146 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-12-06 03:15:09,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-06 03:15:09,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-06 03:15:09,221 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-12-06 03:15:09,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-12-06 03:15:09,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 57 states and 94 transitions. [2024-12-06 03:15:09,402 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 94 transitions. [2024-12-06 03:15:09,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-12-06 03:15:09,404 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-12-06 03:15:09,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-06 03:15:09,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-06 03:15:09,781 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-12-06 03:15:11,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-12-06 03:15:11,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 62 states and 104 transitions. [2024-12-06 03:15:11,137 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 104 transitions. [2024-12-06 03:15:11,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-12-06 03:15:11,139 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-12-06 03:15:11,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-06 03:15:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-06 03:15:11,355 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 9 proven. 62 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-12-06 03:15:12,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-12-06 03:15:12,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 74 states and 132 transitions. [2024-12-06 03:15:12,565 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 132 transitions. [2024-12-06 03:15:12,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-12-06 03:15:12,566 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-12-06 03:15:12,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-06 03:15:12,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-06 03:15:12,650 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 54 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-12-06 03:15:12,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-12-06 03:15:12,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 76 states and 134 transitions. [2024-12-06 03:15:12,925 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 134 transitions. [2024-12-06 03:15:12,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-12-06 03:15:12,927 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-12-06 03:15:12,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-06 03:15:12,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-06 03:15:13,392 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 91 proven. 74 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2024-12-06 03:15:14,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-12-06 03:15:14,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 79 states and 125 transitions. [2024-12-06 03:15:14,981 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 125 transitions. [2024-12-06 03:15:14,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-12-06 03:15:14,982 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-12-06 03:15:14,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-06 03:15:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-06 03:15:15,076 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2024-12-06 03:15:15,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-12-06 03:15:15,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 79 states and 124 transitions. [2024-12-06 03:15:15,388 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 124 transitions. [2024-12-06 03:15:15,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-12-06 03:15:15,390 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-12-06 03:15:15,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-06 03:15:15,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-06 03:15:15,629 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 103 proven. 27 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2024-12-06 03:15:15,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-12-06 03:15:15,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 79 states and 122 transitions. [2024-12-06 03:15:15,998 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 122 transitions. [2024-12-06 03:15:15,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-12-06 03:15:15,999 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-12-06 03:15:15,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-06 03:15:16,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-12-06 03:15:16,015 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-12-06 03:15:16,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-12-06 03:15:16,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-12-06 03:15:16,104 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-12-06 03:15:16,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-12-06 03:15:16,157 WARN L473 CodeCheckObserver]: This program is UNSAFE, Check terminated with 15 iterations. [2024-12-06 03:15:16,193 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 06.12 03:15:16 ImpRootNode [2024-12-06 03:15:16,193 INFO L131 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2024-12-06 03:15:16,194 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-12-06 03:15:16,194 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-12-06 03:15:16,194 INFO L274 PluginConnector]: Witness Printer initialized [2024-12-06 03:15:16,195 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 03:15:04" (3/4) ... [2024-12-06 03:15:16,195 INFO L140 WitnessPrinter]: Generating witness for reachability counterexample [2024-12-06 03:15:16,243 INFO L129 tionWitnessGenerator]: Generated YAML witness of length 59. [2024-12-06 03:15:16,310 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f2619e6-6fd4-4001-9460-1200622e7510/bin/ukojak-verify-CZk0znPC7b/witness.graphml [2024-12-06 03:15:16,311 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f2619e6-6fd4-4001-9460-1200622e7510/bin/ukojak-verify-CZk0znPC7b/witness.yml [2024-12-06 03:15:16,311 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-12-06 03:15:16,312 INFO L158 Benchmark]: Toolchain (without parser) took 11914.74ms. Allocated memory was 142.6MB in the beginning and 176.2MB in the end (delta: 33.6MB). Free memory was 116.9MB in the beginning and 129.3MB in the end (delta: -12.4MB). Peak memory consumption was 19.4MB. Max. memory is 16.1GB. [2024-12-06 03:15:16,312 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 142.6MB. Free memory is still 84.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-12-06 03:15:16,312 INFO L158 Benchmark]: CACSL2BoogieTranslator took 200.44ms. Allocated memory is still 142.6MB. Free memory was 116.9MB in the beginning and 106.1MB in the end (delta: 10.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-12-06 03:15:16,313 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.80ms. Allocated memory is still 142.6MB. Free memory was 106.1MB in the beginning and 105.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-06 03:15:16,313 INFO L158 Benchmark]: Boogie Preprocessor took 15.49ms. Allocated memory is still 142.6MB. Free memory was 105.0MB in the beginning and 104.2MB in the end (delta: 816.9kB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-06 03:15:16,313 INFO L158 Benchmark]: RCFGBuilder took 240.26ms. Allocated memory is still 142.6MB. Free memory was 104.2MB in the beginning and 93.3MB in the end (delta: 10.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-12-06 03:15:16,313 INFO L158 Benchmark]: CodeCheck took 11310.88ms. Allocated memory was 142.6MB in the beginning and 176.2MB in the end (delta: 33.6MB). Free memory was 93.3MB in the beginning and 136.0MB in the end (delta: -42.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-06 03:15:16,314 INFO L158 Benchmark]: Witness Printer took 117.28ms. Allocated memory is still 176.2MB. Free memory was 136.0MB in the beginning and 129.3MB in the end (delta: 6.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-12-06 03:15:16,316 INFO L338 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. OverallTime: 11.2s, OverallIterations: 15, TraceHistogramMax: 0, PathProgramHistogramMax: 0, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1700 SdHoareTripleChecker+Valid, 6.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 810 mSDsluCounter, 1686 SdHoareTripleChecker+Invalid, 5.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 893 mSDsCounter, 1484 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5109 IncrementalHoareTripleChecker+Invalid, 6593 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1484 mSolverCounterUnsat, 793 mSDtfsCounter, 5109 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6747 GetRequests, 6373 SyntacticMatches, 162 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18838 ImplicationChecksByTransitivity, 8.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 888 NumberOfCodeBlocks, 888 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 769 ConstructedInterpolants, 0 QuantifiedInterpolants, 1369 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 1198/1479 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, ConComCheckerStatistics: No data available - CounterExampleResult [Line: 41]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L38] int x = 5; VAL [x=5] [L39] CALL, EXPR fibo1(x) VAL [\old(n)=5] [L10] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L12] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L15] CALL, EXPR fibo2(n-1) 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] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, 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] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=3, 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] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=3, n=3] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=4, 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] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, 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] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=4, n=4] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=5, n=5] [L15] CALL, EXPR fibo2(n-2) 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] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, 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] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, 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] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, n=3] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=5, n=5] [L15] return fibo2(n-1) + fibo2(n-2); [L39] RET, EXPR fibo1(x) VAL [x=5] [L39] int result = fibo1(x); [L40] COND TRUE result == 5 VAL [x=5] [L41] reach_error() VAL [x=5] * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 142.6MB. Free memory is still 84.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 200.44ms. Allocated memory is still 142.6MB. Free memory was 116.9MB in the beginning and 106.1MB in the end (delta: 10.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.80ms. Allocated memory is still 142.6MB. Free memory was 106.1MB in the beginning and 105.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 15.49ms. Allocated memory is still 142.6MB. Free memory was 105.0MB in the beginning and 104.2MB in the end (delta: 816.9kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 240.26ms. Allocated memory is still 142.6MB. Free memory was 104.2MB in the beginning and 93.3MB in the end (delta: 10.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * CodeCheck took 11310.88ms. Allocated memory was 142.6MB in the beginning and 176.2MB in the end (delta: 33.6MB). Free memory was 93.3MB in the beginning and 136.0MB in the end (delta: -42.7MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 117.28ms. Allocated memory is still 176.2MB. Free memory was 136.0MB in the beginning and 129.3MB in the end (delta: 6.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. RESULT: Ultimate proved your program to be incorrect! [2024-12-06 03:15:16,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f2619e6-6fd4-4001-9460-1200622e7510/bin/ukojak-verify-CZk0znPC7b/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