./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 69874e26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_330325d9-cd29-4915-a8f2-17628f9b3746/bin/ukojak/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_330325d9-cd29-4915-a8f2-17628f9b3746/bin/ukojak/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_330325d9-cd29-4915-a8f2-17628f9b3746/bin/ukojak/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_330325d9-cd29-4915-a8f2-17628f9b3746/bin/ukojak/config/KojakReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_330325d9-cd29-4915-a8f2-17628f9b3746/bin/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_330325d9-cd29-4915-a8f2-17628f9b3746/bin/ukojak --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Kojak --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f684876205455ff045e7b27eb3c5cbf35fa59fa1 ............................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-69874e2 [2020-12-01 16:29:37,316 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 16:29:37,319 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 16:29:37,386 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 16:29:37,387 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 16:29:37,394 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 16:29:37,397 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 16:29:37,400 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 16:29:37,402 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 16:29:37,406 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 16:29:37,408 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 16:29:37,412 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 16:29:37,413 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 16:29:37,422 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 16:29:37,424 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 16:29:37,428 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 16:29:37,430 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 16:29:37,437 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 16:29:37,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 16:29:37,444 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 16:29:37,452 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 16:29:37,454 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 16:29:37,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 16:29:37,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 16:29:37,466 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 16:29:37,467 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 16:29:37,468 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 16:29:37,471 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 16:29:37,471 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 16:29:37,473 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 16:29:37,474 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 16:29:37,475 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 16:29:37,478 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 16:29:37,480 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 16:29:37,481 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 16:29:37,482 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 16:29:37,483 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 16:29:37,483 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 16:29:37,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 16:29:37,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 16:29:37,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 16:29:37,490 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_330325d9-cd29-4915-a8f2-17628f9b3746/bin/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf [2020-12-01 16:29:37,533 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 16:29:37,534 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 16:29:37,535 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-01 16:29:37,536 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2020-12-01 16:29:37,538 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 16:29:37,538 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 16:29:37,539 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 16:29:37,539 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 16:29:37,539 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 16:29:37,539 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 16:29:37,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 16:29:37,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-01 16:29:37,542 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 16:29:37,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-01 16:29:37,542 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 16:29:37,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 16:29:37,543 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 16:29:37,543 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-01 16:29:37,543 INFO L136 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2020-12-01 16:29:37,543 INFO L138 SettingsManager]: * Timeout in seconds=1000000 [2020-12-01 16:29:37,544 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 16:29:37,544 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 16:29:37,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2020-12-01 16:29:37,545 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 16:29:37,545 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 16:29:37,545 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-01 16:29:37,545 INFO L138 SettingsManager]: * Trace refinement strategy=PENGUIN [2020-12-01 16:29:37,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-01 16:29:37,546 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-01 16:29:37,548 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_330325d9-cd29-4915-a8f2-17628f9b3746/bin/ukojak/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_330325d9-cd29-4915-a8f2-17628f9b3746/bin/ukojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f684876205455ff045e7b27eb3c5cbf35fa59fa1 [2020-12-01 16:29:37,839 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 16:29:37,881 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 16:29:37,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 16:29:37,885 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 16:29:37,887 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 16:29:37,888 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_330325d9-cd29-4915-a8f2-17628f9b3746/bin/ukojak/../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c [2020-12-01 16:29:37,983 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_330325d9-cd29-4915-a8f2-17628f9b3746/bin/ukojak/data/db0b2ed12/d05305de55d845038ead8ff1d1150896/FLAG26f88aca2 [2020-12-01 16:29:38,536 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 16:29:38,537 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_330325d9-cd29-4915-a8f2-17628f9b3746/sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c [2020-12-01 16:29:38,545 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_330325d9-cd29-4915-a8f2-17628f9b3746/bin/ukojak/data/db0b2ed12/d05305de55d845038ead8ff1d1150896/FLAG26f88aca2 [2020-12-01 16:29:38,908 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_330325d9-cd29-4915-a8f2-17628f9b3746/bin/ukojak/data/db0b2ed12/d05305de55d845038ead8ff1d1150896 [2020-12-01 16:29:38,911 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 16:29:38,915 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 16:29:38,921 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 16:29:38,922 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 16:29:38,926 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 16:29:38,928 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 04:29:38" (1/1) ... [2020-12-01 16:29:38,932 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@436685a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:29:38, skipping insertion in model container [2020-12-01 16:29:38,932 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 04:29:38" (1/1) ... [2020-12-01 16:29:38,940 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 16:29:38,955 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 16:29:39,171 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 16:29:39,185 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 16:29:39,223 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 16:29:39,244 INFO L208 MainTranslator]: Completed translation [2020-12-01 16:29:39,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:29:39 WrapperNode [2020-12-01 16:29:39,246 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 16:29:39,249 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 16:29:39,249 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 16:29:39,249 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 16:29:39,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:29:39" (1/1) ... [2020-12-01 16:29:39,271 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:29:39" (1/1) ... [2020-12-01 16:29:39,293 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 16:29:39,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 16:29:39,295 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 16:29:39,295 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 16:29:39,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:29:39" (1/1) ... [2020-12-01 16:29:39,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:29:39" (1/1) ... [2020-12-01 16:29:39,322 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:29:39" (1/1) ... [2020-12-01 16:29:39,322 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:29:39" (1/1) ... [2020-12-01 16:29:39,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:29:39" (1/1) ... [2020-12-01 16:29:39,328 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:29:39" (1/1) ... [2020-12-01 16:29:39,329 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:29:39" (1/1) ... [2020-12-01 16:29:39,331 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 16:29:39,332 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 16:29:39,332 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 16:29:39,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 16:29:39,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:29:39" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_330325d9-cd29-4915-a8f2-17628f9b3746/bin/ukojak/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2020-12-01 16:29:39,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-01 16:29:39,417 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-12-01 16:29:39,418 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-12-01 16:29:39,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 16:29:39,418 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-12-01 16:29:39,418 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-12-01 16:29:39,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 16:29:39,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 16:29:39,708 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 16:29:39,709 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-01 16:29:39,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 04:29:39 BoogieIcfgContainer [2020-12-01 16:29:39,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 16:29:39,713 INFO L113 PluginConnector]: ------------------------CodeCheck---------------------------- [2020-12-01 16:29:39,713 INFO L271 PluginConnector]: Initializing CodeCheck... [2020-12-01 16:29:39,726 INFO L275 PluginConnector]: CodeCheck initialized [2020-12-01 16:29:39,726 INFO L185 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 04:29:39" (1/1) ... [2020-12-01 16:29:39,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 16:29:39,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 16:29:39,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 26 states and 33 transitions. [2020-12-01 16:29:39,784 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2020-12-01 16:29:39,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-01 16:29:39,790 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 16:29:39,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:29:40,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 16:29:40,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 16:29:40,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 30 states and 39 transitions. [2020-12-01 16:29:40,209 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2020-12-01 16:29:40,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-01 16:29:40,210 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 16:29:40,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:29:40,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 16:29:40,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 16:29:40,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 34 states and 46 transitions. [2020-12-01 16:29:40,479 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2020-12-01 16:29:40,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-01 16:29:40,480 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 16:29:40,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:29:40,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 16:29:40,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 16:29:40,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 36 states and 50 transitions. [2020-12-01 16:29:40,802 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 50 transitions. [2020-12-01 16:29:40,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-01 16:29:40,806 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 16:29:40,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:29:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 16:29:41,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 16:29:41,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 43 states and 66 transitions. [2020-12-01 16:29:41,820 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 66 transitions. [2020-12-01 16:29:41,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-01 16:29:41,823 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 16:29:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:29:41,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-01 16:29:42,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 16:29:42,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 45 states and 69 transitions. [2020-12-01 16:29:42,538 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 69 transitions. [2020-12-01 16:29:42,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-01 16:29:42,540 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 16:29:42,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:29:42,903 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-01 16:29:43,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 16:29:43,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 45 states and 66 transitions. [2020-12-01 16:29:43,908 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 66 transitions. [2020-12-01 16:29:43,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-01 16:29:43,910 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 16:29:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:29:44,158 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-01 16:29:45,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 16:29:45,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 57 states and 95 transitions. [2020-12-01 16:29:45,850 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 95 transitions. [2020-12-01 16:29:45,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-01 16:29:45,856 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 16:29:45,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:29:45,923 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-01 16:29:46,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 16:29:46,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 57 states and 94 transitions. [2020-12-01 16:29:46,161 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 94 transitions. [2020-12-01 16:29:46,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-01 16:29:46,163 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 16:29:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:29:46,206 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-01 16:29:46,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 16:29:46,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 57 states and 93 transitions. [2020-12-01 16:29:46,460 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 93 transitions. [2020-12-01 16:29:46,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-01 16:29:46,462 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 16:29:46,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 16:29:46,486 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 16:29:46,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 16:29:46,508 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 16:29:46,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 16:29:46,600 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 16:29:46,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 16:29:46,644 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 16:29:46,965 WARN L483 CodeCheckObserver]: This program is UNSAFE, Check terminated with 10 iterations. [2020-12-01 16:29:47,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 01.12 04:29:47 ImpRootNode [2020-12-01 16:29:47,092 INFO L132 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2020-12-01 16:29:47,093 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 16:29:47,093 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 16:29:47,094 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 16:29:47,094 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 04:29:39" (3/4) ... [2020-12-01 16:29:47,097 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-01 16:29:47,213 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_330325d9-cd29-4915-a8f2-17628f9b3746/bin/ukojak/witness.graphml [2020-12-01 16:29:47,214 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 16:29:47,216 INFO L168 Benchmark]: Toolchain (without parser) took 8299.54 ms. Allocated memory was 79.7 MB in the beginning and 172.0 MB in the end (delta: 92.3 MB). Free memory was 50.7 MB in the beginning and 107.6 MB in the end (delta: -56.9 MB). Peak memory consumption was 34.7 MB. Max. memory is 16.1 GB. [2020-12-01 16:29:47,216 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 79.7 MB. Free memory is still 35.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 16:29:47,217 INFO L168 Benchmark]: CACSL2BoogieTranslator took 325.58 ms. Allocated memory was 79.7 MB in the beginning and 96.5 MB in the end (delta: 16.8 MB). Free memory was 50.4 MB in the beginning and 73.3 MB in the end (delta: -22.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-01 16:29:47,218 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.87 ms. Allocated memory is still 96.5 MB. Free memory was 73.3 MB in the beginning and 72.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 16:29:47,219 INFO L168 Benchmark]: Boogie Preprocessor took 36.85 ms. Allocated memory is still 96.5 MB. Free memory was 72.0 MB in the beginning and 70.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 16:29:47,220 INFO L168 Benchmark]: RCFGBuilder took 379.91 ms. Allocated memory is still 96.5 MB. Free memory was 70.9 MB in the beginning and 56.5 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-01 16:29:47,220 INFO L168 Benchmark]: CodeCheck took 7378.89 ms. Allocated memory was 96.5 MB in the beginning and 172.0 MB in the end (delta: 75.5 MB). Free memory was 56.5 MB in the beginning and 111.8 MB in the end (delta: -55.3 MB). Peak memory consumption was 22.8 MB. Max. memory is 16.1 GB. [2020-12-01 16:29:47,221 INFO L168 Benchmark]: Witness Printer took 121.01 ms. Allocated memory is still 172.0 MB. Free memory was 111.8 MB in the beginning and 107.6 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-01 16:29:47,225 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck: - StatisticsResult: Ultimate CodeCheck benchmark data CFG has 3 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.2s, OverallIterations: 10, TraceHistogramMax: 0, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 7772 SDtfs, 2812 SDslu, 3560 SDs, 0 SdLazy, 16800 SolverSat, 5752 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2631 GetRequests, 2468 SyntacticMatches, 49 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4126 ImplicationChecksByTransitivity, 4.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, traceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 337 NumberOfCodeBlocks, 337 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 264 ConstructedInterpolants, 0 QuantifiedInterpolants, 17428 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 108/149 InterpolantCoveringCapability, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L38] int x = 4; [L39] CALL, EXPR fibo1(x) VAL [\old(n)=4] [L10] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L12] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0, n=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L15] return fibo2(n-1) + fibo2(n-2); [L39] RET, EXPR fibo1(x) [L39] int result = fibo1(x); [L40] COND TRUE result == 3 [L4] __assert_fail("0", "fibo_2calls_4-2.c", 4, "reach_error") * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 79.7 MB. Free memory is still 35.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 325.58 ms. Allocated memory was 79.7 MB in the beginning and 96.5 MB in the end (delta: 16.8 MB). Free memory was 50.4 MB in the beginning and 73.3 MB in the end (delta: -22.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.87 ms. Allocated memory is still 96.5 MB. Free memory was 73.3 MB in the beginning and 72.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.85 ms. Allocated memory is still 96.5 MB. Free memory was 72.0 MB in the beginning and 70.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 379.91 ms. Allocated memory is still 96.5 MB. Free memory was 70.9 MB in the beginning and 56.5 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * CodeCheck took 7378.89 ms. Allocated memory was 96.5 MB in the beginning and 172.0 MB in the end (delta: 75.5 MB). Free memory was 56.5 MB in the beginning and 111.8 MB in the end (delta: -55.3 MB). Peak memory consumption was 22.8 MB. Max. memory is 16.1 GB. * Witness Printer took 121.01 ms. Allocated memory is still 172.0 MB. Free memory was 111.8 MB in the beginning and 107.6 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...