./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_postdec_34_bad.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc 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_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9/config/KojakReach.xml -i ../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_postdec_34_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9/config/svcomp-Overflow-64bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Kojak --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 6cc19415d2c506dfc0f3885e109faba292247adb3ee953669e2cd73af727a6cc --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 23:17:32,958 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 23:17:33,020 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9/config/svcomp-Overflow-64bit-Kojak_Default.epf [2023-12-02 23:17:33,024 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 23:17:33,025 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck.Interpolating solver [2023-12-02 23:17:33,047 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 23:17:33,047 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 23:17:33,048 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2023-12-02 23:17:33,049 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 23:17:33,049 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 23:17:33,050 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 23:17:33,050 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 23:17:33,051 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 23:17:33,051 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 23:17:33,052 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 23:17:33,052 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 23:17:33,053 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 23:17:33,053 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-12-02 23:17:33,054 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 23:17:33,054 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 23:17:33,055 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 23:17:33,056 INFO L151 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2023-12-02 23:17:33,056 INFO L153 SettingsManager]: * Timeout in seconds=1000000 [2023-12-02 23:17:33,057 INFO L153 SettingsManager]: * Theory for external solver=ALL [2023-12-02 23:17:33,057 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 23:17:33,058 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2023-12-02 23:17:33,058 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 23:17:33,059 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 23:17:33,059 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 23:17:33,059 INFO L153 SettingsManager]: * Trace refinement strategy=PENGUIN [2023-12-02 23:17:33,060 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 23:17:33,060 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 23:17:33,061 INFO L153 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_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6cc19415d2c506dfc0f3885e109faba292247adb3ee953669e2cd73af727a6cc [2023-12-02 23:17:33,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 23:17:33,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 23:17:33,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 23:17:33,320 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 23:17:33,320 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 23:17:33,321 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9/../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_postdec_34_bad.i [2023-12-02 23:17:36,075 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 23:17:36,360 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 23:17:36,361 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a7e641-f5d0-4661-9f58-56f04e5ceb92/sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_postdec_34_bad.i [2023-12-02 23:17:36,385 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9/data/f12d768d6/9db22df7e4dd495f9e1686b2aff49170/FLAGe585f5e52 [2023-12-02 23:17:36,400 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9/data/f12d768d6/9db22df7e4dd495f9e1686b2aff49170 [2023-12-02 23:17:36,402 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 23:17:36,404 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 23:17:36,405 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 23:17:36,405 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 23:17:36,410 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 23:17:36,411 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 11:17:36" (1/1) ... [2023-12-02 23:17:36,412 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16638e9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:17:36, skipping insertion in model container [2023-12-02 23:17:36,412 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 11:17:36" (1/1) ... [2023-12-02 23:17:36,475 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 23:17:37,154 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 23:17:37,166 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 23:17:37,251 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 23:17:37,415 WARN L675 CHandler]: The function puts is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 23:17:37,416 WARN L675 CHandler]: The function __ctype_b_loc is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 23:17:37,416 WARN L675 CHandler]: The function iswxdigit is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 23:17:37,416 WARN L675 CHandler]: The function time is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 23:17:37,416 WARN L675 CHandler]: The function fgets is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 23:17:37,422 INFO L206 MainTranslator]: Completed translation [2023-12-02 23:17:37,422 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:17:37 WrapperNode [2023-12-02 23:17:37,422 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 23:17:37,423 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 23:17:37,423 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 23:17:37,424 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 23:17:37,429 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:17:37" (1/1) ... [2023-12-02 23:17:37,456 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:17:37" (1/1) ... [2023-12-02 23:17:37,483 INFO L138 Inliner]: procedures = 499, calls = 67, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 68 [2023-12-02 23:17:37,484 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 23:17:37,485 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 23:17:37,485 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 23:17:37,485 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 23:17:37,492 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:17:37" (1/1) ... [2023-12-02 23:17:37,492 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:17:37" (1/1) ... [2023-12-02 23:17:37,495 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:17:37" (1/1) ... [2023-12-02 23:17:37,496 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:17:37" (1/1) ... [2023-12-02 23:17:37,504 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:17:37" (1/1) ... [2023-12-02 23:17:37,506 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:17:37" (1/1) ... [2023-12-02 23:17:37,508 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:17:37" (1/1) ... [2023-12-02 23:17:37,509 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:17:37" (1/1) ... [2023-12-02 23:17:37,513 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 23:17:37,514 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 23:17:37,514 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 23:17:37,514 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 23:17:37,515 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:17:37" (1/1) ... [2023-12-02 23:17:37,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2023-12-02 23:17:37,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9/z3 [2023-12-02 23:17:37,544 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2023-12-02 23:17:37,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2023-12-02 23:17:37,574 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2023-12-02 23:17:37,574 INFO L130 BoogieDeclarations]: Found specification of procedure printLine [2023-12-02 23:17:37,574 INFO L138 BoogieDeclarations]: Found implementation of procedure printLine [2023-12-02 23:17:37,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 23:17:37,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-12-02 23:17:37,575 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 23:17:37,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 23:17:37,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 23:17:37,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 23:17:37,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 23:17:37,576 INFO L130 BoogieDeclarations]: Found specification of procedure time [2023-12-02 23:17:37,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 23:17:37,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 23:17:37,708 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 23:17:37,710 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 23:17:37,827 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 23:17:37,868 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 23:17:37,869 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 23:17:37,870 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 11:17:37 BoogieIcfgContainer [2023-12-02 23:17:37,871 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 23:17:37,872 INFO L112 PluginConnector]: ------------------------CodeCheck---------------------------- [2023-12-02 23:17:37,872 INFO L270 PluginConnector]: Initializing CodeCheck... [2023-12-02 23:17:37,879 INFO L274 PluginConnector]: CodeCheck initialized [2023-12-02 23:17:37,880 INFO L184 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 11:17:37" (1/1) ... [2023-12-02 23:17:37,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 23:17:37,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-12-02 23:17:37,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 16 states and 18 transitions. [2023-12-02 23:17:37,933 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2023-12-02 23:17:37,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 23:17:37,937 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-12-02 23:17:37,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 23:17:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 23:17:38,074 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 23:17:38,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 23:17:38,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 23:17:38,192 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 23:17:38,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 23:17:38,229 WARN L476 CodeCheckObserver]: This program is UNSAFE, Check terminated with 1 iterations. [2023-12-02 23:17:38,250 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~nondet104 [2023-12-02 23:17:38,252 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post102 could not be translated [2023-12-02 23:17:38,257 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 02.12 11:17:38 ImpRootNode [2023-12-02 23:17:38,257 INFO L131 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2023-12-02 23:17:38,257 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 23:17:38,258 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 23:17:38,258 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 23:17:38,258 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 11:17:37" (3/4) ... [2023-12-02 23:17:38,260 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-12-02 23:17:38,262 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 23:17:38,263 INFO L158 Benchmark]: Toolchain (without parser) took 1858.41ms. Allocated memory was 132.1MB in the beginning and 188.7MB in the end (delta: 56.6MB). Free memory was 89.2MB in the beginning and 94.9MB in the end (delta: -5.6MB). Peak memory consumption was 53.3MB. Max. memory is 16.1GB. [2023-12-02 23:17:38,263 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 132.1MB. Free memory is still 101.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 23:17:38,264 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1017.56ms. Allocated memory was 132.1MB in the beginning and 188.7MB in the end (delta: 56.6MB). Free memory was 89.2MB in the beginning and 135.8MB in the end (delta: -46.6MB). Peak memory consumption was 55.4MB. Max. memory is 16.1GB. [2023-12-02 23:17:38,264 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.66ms. Allocated memory is still 188.7MB. Free memory was 135.8MB in the beginning and 132.6MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-12-02 23:17:38,265 INFO L158 Benchmark]: Boogie Preprocessor took 28.77ms. Allocated memory is still 188.7MB. Free memory was 132.6MB in the beginning and 131.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 23:17:38,265 INFO L158 Benchmark]: RCFGBuilder took 356.68ms. Allocated memory is still 188.7MB. Free memory was 131.5MB in the beginning and 115.8MB in the end (delta: 15.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-12-02 23:17:38,266 INFO L158 Benchmark]: CodeCheck took 385.34ms. Allocated memory is still 188.7MB. Free memory was 114.9MB in the beginning and 94.9MB in the end (delta: 20.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2023-12-02 23:17:38,267 INFO L158 Benchmark]: Witness Printer took 4.25ms. Allocated memory is still 188.7MB. Free memory was 94.9MB in the beginning and 94.9MB in the end (delta: 2.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 23:17:38,270 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 2 procedures, 16 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 0, PathProgramHistogramMax: 0, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 8 NumberOfCodeBlocks, 8 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 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 - UnprovableResult [Line: 1573]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: overapproximation of atoi at line 1562, overapproximation of large string literal at line 1582. Possible FailurePath: [L1522] const int GLOBAL_CONST_TRUE = 1; [L1523] const int GLOBAL_CONST_FALSE = 0; [L1524] const int GLOBAL_CONST_FIVE = 5; [L1525] int globalTrue = 1; [L1526] int globalFalse = 0; [L1527] int globalFive = 5; [L1546] int globalArgc = 0; [L1547] char** globalArgv = ((void *)0); [L1582] CALL printLine("Calling bad()...") VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1, line={4:0}] [L1414] COND TRUE line != ((void *)0) [L1582] RET printLine("Calling bad()...") VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, \old(argc)=44, argc=44, argv={45:46}, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1583] CALL CWE191_Integer_Underflow__int_fgets_postdec_34_bad() [L1555] int data; [L1556] CWE191_Integer_Underflow__int_fgets_postdec_34_unionType myUnion; [L1557] data = 0 [L1559] char inputBuffer[(3 * sizeof(data) + 2)] = ""; [L1560] COND TRUE, EXPR fgets(inputBuffer, (3 * sizeof(data) + 2), stdin) != ((void *)0) [L1562] EXPR data = atoi(inputBuffer) [L1559] char inputBuffer[(3 * sizeof(data) + 2)] = ""; [L1558-L1568] { char inputBuffer[(3 * sizeof(data) + 2)] = ""; if (fgets(inputBuffer, (3 * sizeof(data) + 2), stdin) != ((void *)0)) { data = atoi(inputBuffer); } else { printLine("fgets() failed."); } } [L1569] myUnion.unionFirst = data [L1571] EXPR myUnion.unionSecond [L1571] int data = myUnion.unionSecond; [L1573] data-- VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, data=-2147483648, data=-2147483648, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1, myUnion={5860:0}] * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 132.1MB. Free memory is still 101.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1017.56ms. Allocated memory was 132.1MB in the beginning and 188.7MB in the end (delta: 56.6MB). Free memory was 89.2MB in the beginning and 135.8MB in the end (delta: -46.6MB). Peak memory consumption was 55.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 60.66ms. Allocated memory is still 188.7MB. Free memory was 135.8MB in the beginning and 132.6MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.77ms. Allocated memory is still 188.7MB. Free memory was 132.6MB in the beginning and 131.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 356.68ms. Allocated memory is still 188.7MB. Free memory was 131.5MB in the beginning and 115.8MB in the end (delta: 15.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * CodeCheck took 385.34ms. Allocated memory is still 188.7MB. Free memory was 114.9MB in the beginning and 94.9MB in the end (delta: 20.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Witness Printer took 4.25ms. Allocated memory is still 188.7MB. Free memory was 94.9MB in the beginning and 94.9MB in the end (delta: 2.6kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~nondet104 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post102 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-12-02 23:17:38,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9/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 Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9/config/KojakReach.xml -i ../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_postdec_34_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9/config/svcomp-Overflow-64bit-Kojak_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Kojak --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 6cc19415d2c506dfc0f3885e109faba292247adb3ee953669e2cd73af727a6cc --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 23:17:40,285 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 23:17:40,352 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9/config/svcomp-Overflow-64bit-Kojak_Bitvector.epf [2023-12-02 23:17:40,382 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 23:17:40,383 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 23:17:40,383 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2023-12-02 23:17:40,384 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 23:17:40,385 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 23:17:40,385 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 23:17:40,386 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 23:17:40,386 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 23:17:40,387 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 23:17:40,387 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 23:17:40,388 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 23:17:40,388 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 23:17:40,389 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 23:17:40,389 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-12-02 23:17:40,389 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 23:17:40,390 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 23:17:40,390 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 23:17:40,391 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 23:17:40,392 INFO L151 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2023-12-02 23:17:40,392 INFO L153 SettingsManager]: * Timeout in seconds=1000000 [2023-12-02 23:17:40,393 INFO L153 SettingsManager]: * Theory for external solver=ALL [2023-12-02 23:17:40,393 INFO L153 SettingsManager]: * Command for calling external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 23:17:40,393 INFO L153 SettingsManager]: * Choose which separate solver to use for tracechecks=External_ModelsAndUnsatCoreMode [2023-12-02 23:17:40,394 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 23:17:40,394 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2023-12-02 23:17:40,395 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 23:17:40,395 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 23:17:40,396 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 23:17:40,396 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 23:17:40,396 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 23:17:40,397 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 23:17:40,397 INFO L153 SettingsManager]: * Use separate solver for trace checks=false [2023-12-02 23:17:40,397 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 23:17:40,398 INFO L153 SettingsManager]: * Logic for external solver=AUFBV 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_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6cc19415d2c506dfc0f3885e109faba292247adb3ee953669e2cd73af727a6cc [2023-12-02 23:17:40,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 23:17:40,706 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 23:17:40,709 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 23:17:40,711 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 23:17:40,711 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 23:17:40,713 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9/../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_postdec_34_bad.i [2023-12-02 23:17:43,500 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 23:17:43,834 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 23:17:43,834 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a7e641-f5d0-4661-9f58-56f04e5ceb92/sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_postdec_34_bad.i [2023-12-02 23:17:43,857 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9/data/e3c8a14ad/4d511ce6306e4909b7edcb2856705a93/FLAG08a9607b9 [2023-12-02 23:17:43,872 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9/data/e3c8a14ad/4d511ce6306e4909b7edcb2856705a93 [2023-12-02 23:17:43,874 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 23:17:43,876 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 23:17:43,877 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 23:17:43,877 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 23:17:43,882 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 23:17:43,883 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 11:17:43" (1/1) ... [2023-12-02 23:17:43,884 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@193745c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:17:43, skipping insertion in model container [2023-12-02 23:17:43,884 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 11:17:43" (1/1) ... [2023-12-02 23:17:43,941 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 23:17:44,717 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 23:17:44,733 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 23:17:44,821 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 23:17:44,974 WARN L675 CHandler]: The function puts is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 23:17:44,974 WARN L675 CHandler]: The function __ctype_b_loc is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 23:17:44,974 WARN L675 CHandler]: The function iswxdigit is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 23:17:44,975 WARN L675 CHandler]: The function time is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 23:17:44,975 WARN L675 CHandler]: The function fgets is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 23:17:44,982 INFO L206 MainTranslator]: Completed translation [2023-12-02 23:17:44,982 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:17:44 WrapperNode [2023-12-02 23:17:44,982 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 23:17:44,983 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 23:17:44,983 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 23:17:44,983 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 23:17:44,988 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:17:44" (1/1) ... [2023-12-02 23:17:45,017 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:17:44" (1/1) ... [2023-12-02 23:17:45,041 INFO L138 Inliner]: procedures = 504, calls = 67, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 67 [2023-12-02 23:17:45,042 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 23:17:45,042 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 23:17:45,042 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 23:17:45,043 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 23:17:45,051 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:17:44" (1/1) ... [2023-12-02 23:17:45,051 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:17:44" (1/1) ... [2023-12-02 23:17:45,056 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:17:44" (1/1) ... [2023-12-02 23:17:45,056 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:17:44" (1/1) ... [2023-12-02 23:17:45,067 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:17:44" (1/1) ... [2023-12-02 23:17:45,069 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:17:44" (1/1) ... [2023-12-02 23:17:45,072 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:17:44" (1/1) ... [2023-12-02 23:17:45,074 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:17:44" (1/1) ... [2023-12-02 23:17:45,079 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 23:17:45,080 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 23:17:45,080 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 23:17:45,081 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 23:17:45,081 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:17:44" (1/1) ... [2023-12-02 23:17:45,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2023-12-02 23:17:45,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9/z3 [2023-12-02 23:17:45,111 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2023-12-02 23:17:45,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2023-12-02 23:17:45,153 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2023-12-02 23:17:45,153 INFO L130 BoogieDeclarations]: Found specification of procedure printLine [2023-12-02 23:17:45,153 INFO L138 BoogieDeclarations]: Found implementation of procedure printLine [2023-12-02 23:17:45,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 23:17:45,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-12-02 23:17:45,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 23:17:45,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 23:17:45,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 23:17:45,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-12-02 23:17:45,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 23:17:45,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-12-02 23:17:45,154 INFO L130 BoogieDeclarations]: Found specification of procedure time [2023-12-02 23:17:45,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2023-12-02 23:17:45,315 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 23:17:45,317 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 23:17:45,461 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 23:17:45,505 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 23:17:45,505 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 23:17:45,507 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 11:17:45 BoogieIcfgContainer [2023-12-02 23:17:45,507 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 23:17:45,508 INFO L112 PluginConnector]: ------------------------CodeCheck---------------------------- [2023-12-02 23:17:45,508 INFO L270 PluginConnector]: Initializing CodeCheck... [2023-12-02 23:17:45,526 INFO L274 PluginConnector]: CodeCheck initialized [2023-12-02 23:17:45,527 INFO L184 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 11:17:45" (1/1) ... [2023-12-02 23:17:45,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 23:17:45,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-12-02 23:17:45,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 16 states and 18 transitions. [2023-12-02 23:17:45,593 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2023-12-02 23:17:45,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 23:17:45,597 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-12-02 23:17:45,598 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 23:17:45,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9/cvc4 [2023-12-02 23:17:45,599 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 23:17:45,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9/cvc4 --incremental --print-success --lang smt (2)] Waiting until timeout for monitored process [2023-12-02 23:17:45,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 23:17:45,849 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 23:17:45,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 23:17:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 23:17:46,192 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 23:17:46,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 23:17:46,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9/cvc4 --incremental --print-success --lang smt (2)] Forceful destruction successful, exit code 0 [2023-12-02 23:17:46,262 WARN L476 CodeCheckObserver]: This program is UNSAFE, Check terminated with 1 iterations. [2023-12-02 23:17:46,281 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~nondet102 [2023-12-02 23:17:46,285 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post100 could not be translated [2023-12-02 23:17:46,289 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 02.12 11:17:46 ImpRootNode [2023-12-02 23:17:46,289 INFO L131 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2023-12-02 23:17:46,290 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 23:17:46,290 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 23:17:46,290 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 23:17:46,291 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 11:17:45" (3/4) ... [2023-12-02 23:17:46,292 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-12-02 23:17:46,293 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 23:17:46,294 INFO L158 Benchmark]: Toolchain (without parser) took 2418.16ms. Allocated memory was 86.0MB in the beginning and 121.6MB in the end (delta: 35.7MB). Free memory was 58.9MB in the beginning and 72.7MB in the end (delta: -13.7MB). Peak memory consumption was 23.9MB. Max. memory is 16.1GB. [2023-12-02 23:17:46,294 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 86.0MB. Free memory was 62.6MB in the beginning and 62.5MB in the end (delta: 153.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 23:17:46,295 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1105.13ms. Allocated memory was 86.0MB in the beginning and 121.6MB in the end (delta: 35.7MB). Free memory was 58.6MB in the beginning and 79.4MB in the end (delta: -20.8MB). Peak memory consumption was 36.9MB. Max. memory is 16.1GB. [2023-12-02 23:17:46,296 INFO L158 Benchmark]: Boogie Procedure Inliner took 58.90ms. Allocated memory is still 121.6MB. Free memory was 79.4MB in the beginning and 76.4MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 23:17:46,296 INFO L158 Benchmark]: Boogie Preprocessor took 37.20ms. Allocated memory is still 121.6MB. Free memory was 76.4MB in the beginning and 74.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 23:17:46,297 INFO L158 Benchmark]: RCFGBuilder took 427.01ms. Allocated memory is still 121.6MB. Free memory was 74.3MB in the beginning and 55.7MB in the end (delta: 18.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-12-02 23:17:46,297 INFO L158 Benchmark]: CodeCheck took 781.25ms. Allocated memory is still 121.6MB. Free memory was 55.7MB in the beginning and 73.3MB in the end (delta: -17.6MB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 23:17:46,298 INFO L158 Benchmark]: Witness Printer took 3.46ms. Allocated memory is still 121.6MB. Free memory was 73.3MB in the beginning and 72.7MB in the end (delta: 677.4kB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 23:17:46,301 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 2 procedures, 16 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 1, TraceHistogramMax: 0, PathProgramHistogramMax: 0, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 8 NumberOfCodeBlocks, 8 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 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 - UnprovableResult [Line: 1573]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: overapproximation of atoi at line 1562, overapproximation of large string literal at line 1582. Possible FailurePath: [L1522] const int GLOBAL_CONST_TRUE = 1; [L1523] const int GLOBAL_CONST_FALSE = 0; [L1524] const int GLOBAL_CONST_FIVE = 5; [L1525] int globalTrue = 1; [L1526] int globalFalse = 0; [L1527] int globalFive = 5; [L1546] int globalArgc = 0; [L1547] char** globalArgv = ((void *)0); [L1582] CALL printLine("Calling bad()...") VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1, line={4:0}] [L1414] COND TRUE line != ((void *)0) [L1582] RET printLine("Calling bad()...") VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, \old(argc)=0, argc=0, argv={0:0}, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1583] CALL CWE191_Integer_Underflow__int_fgets_postdec_34_bad() [L1555] int data; [L1556] CWE191_Integer_Underflow__int_fgets_postdec_34_unionType myUnion; [L1557] data = 0 [L1559] char inputBuffer[(3 * sizeof(data) + 2)] = ""; [L1560] COND TRUE, EXPR fgets(inputBuffer, (3 * sizeof(data) + 2), stdin) != ((void *)0) [L1562] EXPR data = atoi(inputBuffer) [L1559] char inputBuffer[(3 * sizeof(data) + 2)] = ""; [L1558-L1568] { char inputBuffer[(3 * sizeof(data) + 2)] = ""; if (fgets(inputBuffer, (3 * sizeof(data) + 2), stdin) != ((void *)0)) { data = atoi(inputBuffer); } else { printLine("fgets() failed."); } } [L1569] myUnion.unionFirst = data [L1571] EXPR myUnion.unionSecond [L1571] int data = myUnion.unionSecond; [L1573] data-- VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, data=-2147483648, data=-2147483648, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1, myUnion={7:0}] * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 86.0MB. Free memory was 62.6MB in the beginning and 62.5MB in the end (delta: 153.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1105.13ms. Allocated memory was 86.0MB in the beginning and 121.6MB in the end (delta: 35.7MB). Free memory was 58.6MB in the beginning and 79.4MB in the end (delta: -20.8MB). Peak memory consumption was 36.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 58.90ms. Allocated memory is still 121.6MB. Free memory was 79.4MB in the beginning and 76.4MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.20ms. Allocated memory is still 121.6MB. Free memory was 76.4MB in the beginning and 74.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 427.01ms. Allocated memory is still 121.6MB. Free memory was 74.3MB in the beginning and 55.7MB in the end (delta: 18.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * CodeCheck took 781.25ms. Allocated memory is still 121.6MB. Free memory was 55.7MB in the beginning and 73.3MB in the end (delta: -17.6MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 3.46ms. Allocated memory is still 121.6MB. Free memory was 73.3MB in the beginning and 72.7MB in the end (delta: 677.4kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~nondet102 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post100 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-12-02 23:17:46,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a7e641-f5d0-4661-9f58-56f04e5ceb92/bin/ukojak-verify-Qdu7aM0XO9/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 Result: UNKNOWN: Overapproximated counterexample