./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_predec_32_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_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi/config/KojakReach.xml -i ../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_predec_32_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi/config/svcomp-Overflow-64bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi --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 6a5d466dc215f8ed26ed8263d386e990454787d0ed2acd2f0781ac9337fda305 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 22:16:06,466 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 22:16:06,533 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi/config/svcomp-Overflow-64bit-Kojak_Default.epf [2023-11-24 22:16:06,538 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 22:16:06,539 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck.Interpolating solver [2023-11-24 22:16:06,563 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 22:16:06,564 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 22:16:06,565 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2023-11-24 22:16:06,566 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 22:16:06,566 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 22:16:06,567 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 22:16:06,568 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 22:16:06,569 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 22:16:06,569 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 22:16:06,570 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 22:16:06,571 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 22:16:06,572 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 22:16:06,572 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-24 22:16:06,573 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 22:16:06,574 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 22:16:06,574 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 22:16:06,575 INFO L151 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2023-11-24 22:16:06,576 INFO L153 SettingsManager]: * Timeout in seconds=1000000 [2023-11-24 22:16:06,577 INFO L153 SettingsManager]: * Theory for external solver=ALL [2023-11-24 22:16:06,577 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 22:16:06,578 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2023-11-24 22:16:06,579 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 22:16:06,579 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 22:16:06,580 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 22:16:06,581 INFO L153 SettingsManager]: * Trace refinement strategy=PENGUIN [2023-11-24 22:16:06,581 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 22:16:06,582 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 22:16:06,582 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_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6a5d466dc215f8ed26ed8263d386e990454787d0ed2acd2f0781ac9337fda305 [2023-11-24 22:16:06,868 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:16:06,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:16:06,900 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:16:06,902 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:16:06,903 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:16:06,904 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi/../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_predec_32_bad.i [2023-11-24 22:16:10,078 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:16:10,501 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:16:10,509 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_268839b2-470b-41f8-a8a9-6e5696b76d6d/sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_predec_32_bad.i [2023-11-24 22:16:10,549 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi/data/191b1ceec/7553a10666044af3a30024af88088c28/FLAG58da8944e [2023-11-24 22:16:10,568 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi/data/191b1ceec/7553a10666044af3a30024af88088c28 [2023-11-24 22:16:10,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:16:10,577 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:16:10,580 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:16:10,580 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:16:10,585 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:16:10,588 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:16:10" (1/1) ... [2023-11-24 22:16:10,589 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47ba9ffe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:16:10, skipping insertion in model container [2023-11-24 22:16:10,590 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:16:10" (1/1) ... [2023-11-24 22:16:10,679 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:16:11,577 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:16:11,588 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 22:16:11,676 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:16:11,922 WARN L675 CHandler]: The function puts is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 22:16:11,922 WARN L675 CHandler]: The function __ctype_b_loc is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 22:16:11,923 WARN L675 CHandler]: The function iswxdigit is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 22:16:11,923 WARN L675 CHandler]: The function time is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 22:16:11,923 WARN L675 CHandler]: The function fgets is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 22:16:11,931 INFO L206 MainTranslator]: Completed translation [2023-11-24 22:16:11,932 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:16:11 WrapperNode [2023-11-24 22:16:11,932 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:16:11,933 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 22:16:11,934 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 22:16:11,934 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 22:16:11,941 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:16:11" (1/1) ... [2023-11-24 22:16:11,986 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:16:11" (1/1) ... [2023-11-24 22:16:12,021 INFO L138 Inliner]: procedures = 499, calls = 69, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2023-11-24 22:16:12,022 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 22:16:12,022 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 22:16:12,023 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 22:16:12,023 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 22:16:12,034 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:16:11" (1/1) ... [2023-11-24 22:16:12,034 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:16:11" (1/1) ... [2023-11-24 22:16:12,038 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:16:11" (1/1) ... [2023-11-24 22:16:12,038 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:16:11" (1/1) ... [2023-11-24 22:16:12,058 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:16:11" (1/1) ... [2023-11-24 22:16:12,060 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:16:11" (1/1) ... [2023-11-24 22:16:12,065 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:16:11" (1/1) ... [2023-11-24 22:16:12,066 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:16:11" (1/1) ... [2023-11-24 22:16:12,070 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 22:16:12,071 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 22:16:12,071 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 22:16:12,071 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 22:16:12,072 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:16:11" (1/1) ... [2023-11-24 22:16:12,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2023-11-24 22:16:12,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi/z3 [2023-11-24 22:16:12,125 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2023-11-24 22:16:12,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2023-11-24 22:16:12,155 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2023-11-24 22:16:12,155 INFO L130 BoogieDeclarations]: Found specification of procedure printLine [2023-11-24 22:16:12,155 INFO L138 BoogieDeclarations]: Found implementation of procedure printLine [2023-11-24 22:16:12,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 22:16:12,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-24 22:16:12,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-24 22:16:12,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 22:16:12,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 22:16:12,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 22:16:12,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 22:16:12,156 INFO L130 BoogieDeclarations]: Found specification of procedure time [2023-11-24 22:16:12,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-24 22:16:12,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 22:16:12,316 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 22:16:12,318 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 22:16:12,470 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 22:16:12,533 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 22:16:12,533 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-24 22:16:12,535 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:16:12 BoogieIcfgContainer [2023-11-24 22:16:12,535 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 22:16:12,536 INFO L112 PluginConnector]: ------------------------CodeCheck---------------------------- [2023-11-24 22:16:12,536 INFO L270 PluginConnector]: Initializing CodeCheck... [2023-11-24 22:16:12,545 INFO L274 PluginConnector]: CodeCheck initialized [2023-11-24 22:16:12,546 INFO L184 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:16:12" (1/1) ... [2023-11-24 22:16:12,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:16:12,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:16:12,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 16 states and 18 transitions. [2023-11-24 22:16:12,608 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2023-11-24 22:16:12,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 22:16:12,613 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:16:12,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:16:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:16:12,784 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 22:16:12,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:16:13,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:16:13,046 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 22:16:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:16:13,095 WARN L476 CodeCheckObserver]: This program is UNSAFE, Check terminated with 1 iterations. [2023-11-24 22:16:13,120 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~nondet105 [2023-11-24 22:16:13,126 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 24.11 10:16:13 ImpRootNode [2023-11-24 22:16:13,127 INFO L131 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2023-11-24 22:16:13,127 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-24 22:16:13,128 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-24 22:16:13,128 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-24 22:16:13,129 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:16:12" (3/4) ... [2023-11-24 22:16:13,131 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-24 22:16:13,132 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-24 22:16:13,134 INFO L158 Benchmark]: Toolchain (without parser) took 2556.43ms. Allocated memory was 161.5MB in the beginning and 237.0MB in the end (delta: 75.5MB). Free memory was 118.6MB in the beginning and 131.0MB in the end (delta: -12.4MB). Peak memory consumption was 63.6MB. Max. memory is 16.1GB. [2023-11-24 22:16:13,134 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 104.9MB. Free memory is still 58.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 22:16:13,135 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1352.64ms. Allocated memory was 161.5MB in the beginning and 237.0MB in the end (delta: 75.5MB). Free memory was 118.6MB in the beginning and 175.0MB in the end (delta: -56.4MB). Peak memory consumption was 51.0MB. Max. memory is 16.1GB. [2023-11-24 22:16:13,136 INFO L158 Benchmark]: Boogie Procedure Inliner took 88.49ms. Allocated memory is still 237.0MB. Free memory was 175.0MB in the beginning and 172.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 22:16:13,137 INFO L158 Benchmark]: Boogie Preprocessor took 47.55ms. Allocated memory is still 237.0MB. Free memory was 172.9MB in the beginning and 170.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 22:16:13,137 INFO L158 Benchmark]: RCFGBuilder took 464.57ms. Allocated memory is still 237.0MB. Free memory was 170.8MB in the beginning and 154.1MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-24 22:16:13,138 INFO L158 Benchmark]: CodeCheck took 590.70ms. Allocated memory is still 237.0MB. Free memory was 154.1MB in the beginning and 131.7MB in the end (delta: 22.4MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2023-11-24 22:16:13,139 INFO L158 Benchmark]: Witness Printer took 5.16ms. Allocated memory is still 237.0MB. Free memory was 131.7MB in the beginning and 131.0MB in the end (delta: 676.0kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 22:16:13,148 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: 0.5s, 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: 1572]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: overapproximation of atoi at line 1560, overapproximation of large string literal at line 1581. 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); [L1581] 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) [L1581] RET printLine("Calling bad()...") VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, \old(argc)=13, argc=13, argv={12:75}, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1582] CALL CWE191_Integer_Underflow__int_fgets_predec_32_bad() [L1550] int data; [L1551] int *dataPtr1 = &data; [L1552] int *dataPtr2 = &data; [L1553] data = 0 [L1555] EXPR \read(*dataPtr1) [L1555] int data = *dataPtr1; [L1557] char inputBuffer[(3 * sizeof(data) + 2)] = ""; [L1558] COND TRUE, EXPR fgets(inputBuffer, (3 * sizeof(data) + 2), stdin) != ((void *)0) [L1560] EXPR data = atoi(inputBuffer) [L1557] char inputBuffer[(3 * sizeof(data) + 2)] = ""; [L1556-L1566] { char inputBuffer[(3 * sizeof(data) + 2)] = ""; if (fgets(inputBuffer, (3 * sizeof(data) + 2), stdin) != ((void *)0)) { data = atoi(inputBuffer); } else { printLine("fgets() failed."); } } [L1567] EXPR *dataPtr1 = data [L1554-L1568] { int data = *dataPtr1; { char inputBuffer[(3 * sizeof(data) + 2)] = ""; if (fgets(inputBuffer, (3 * sizeof(data) + 2), stdin) != ((void *)0)) { data = atoi(inputBuffer); } else { printLine("fgets() failed."); } } *dataPtr1 = data; } [L1570] EXPR \read(*dataPtr2) [L1570] int data = *dataPtr2; [L1572] --data VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, data=-2147483648, data={7:0}, dataPtr1={7:0}, dataPtr2={7:0}, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 104.9MB. Free memory is still 58.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1352.64ms. Allocated memory was 161.5MB in the beginning and 237.0MB in the end (delta: 75.5MB). Free memory was 118.6MB in the beginning and 175.0MB in the end (delta: -56.4MB). Peak memory consumption was 51.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 88.49ms. Allocated memory is still 237.0MB. Free memory was 175.0MB in the beginning and 172.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 47.55ms. Allocated memory is still 237.0MB. Free memory was 172.9MB in the beginning and 170.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 464.57ms. Allocated memory is still 237.0MB. Free memory was 170.8MB in the beginning and 154.1MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * CodeCheck took 590.70ms. Allocated memory is still 237.0MB. Free memory was 154.1MB in the beginning and 131.7MB in the end (delta: 22.4MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Witness Printer took 5.16ms. Allocated memory is still 237.0MB. Free memory was 131.7MB in the beginning and 131.0MB in the end (delta: 676.0kB). 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~nondet105 - 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 [2023-11-24 22:16:13,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi/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_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi/config/KojakReach.xml -i ../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_predec_32_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi/config/svcomp-Overflow-64bit-Kojak_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi --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 6a5d466dc215f8ed26ed8263d386e990454787d0ed2acd2f0781ac9337fda305 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 22:16:15,703 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 22:16:15,835 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi/config/svcomp-Overflow-64bit-Kojak_Bitvector.epf [2023-11-24 22:16:15,888 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 22:16:15,889 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 22:16:15,890 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2023-11-24 22:16:15,891 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 22:16:15,892 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 22:16:15,893 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 22:16:15,894 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 22:16:15,895 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 22:16:15,895 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 22:16:15,895 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 22:16:15,896 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 22:16:15,896 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 22:16:15,897 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-24 22:16:15,897 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-24 22:16:15,898 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-24 22:16:15,898 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 22:16:15,899 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 22:16:15,899 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 22:16:15,901 INFO L151 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2023-11-24 22:16:15,901 INFO L153 SettingsManager]: * Timeout in seconds=1000000 [2023-11-24 22:16:15,902 INFO L153 SettingsManager]: * Theory for external solver=ALL [2023-11-24 22:16:15,902 INFO L153 SettingsManager]: * Command for calling external solver=cvc4 --incremental --print-success --lang smt [2023-11-24 22:16:15,903 INFO L153 SettingsManager]: * Choose which separate solver to use for tracechecks=External_ModelsAndUnsatCoreMode [2023-11-24 22:16:15,903 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 22:16:15,904 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2023-11-24 22:16:15,904 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 22:16:15,904 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 22:16:15,905 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 22:16:15,905 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-24 22:16:15,906 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-24 22:16:15,906 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 22:16:15,906 INFO L153 SettingsManager]: * Use separate solver for trace checks=false [2023-11-24 22:16:15,906 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 22:16:15,907 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_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6a5d466dc215f8ed26ed8263d386e990454787d0ed2acd2f0781ac9337fda305 [2023-11-24 22:16:16,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:16:16,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:16:16,265 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:16:16,266 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:16:16,267 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:16:16,269 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi/../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_predec_32_bad.i [2023-11-24 22:16:19,397 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:16:19,886 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:16:19,886 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_268839b2-470b-41f8-a8a9-6e5696b76d6d/sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_predec_32_bad.i [2023-11-24 22:16:19,913 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi/data/6bd1fb8ec/5a4248808f2e4951abf23d39999fcb9b/FLAG2f0a189d2 [2023-11-24 22:16:19,928 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi/data/6bd1fb8ec/5a4248808f2e4951abf23d39999fcb9b [2023-11-24 22:16:19,931 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:16:19,933 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:16:19,934 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:16:19,934 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:16:19,939 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:16:19,940 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:16:19" (1/1) ... [2023-11-24 22:16:19,942 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47b77ff2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:16:19, skipping insertion in model container [2023-11-24 22:16:19,942 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:16:19" (1/1) ... [2023-11-24 22:16:20,028 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:16:21,331 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:16:21,353 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 22:16:21,472 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:16:21,649 WARN L675 CHandler]: The function puts is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 22:16:21,649 WARN L675 CHandler]: The function __ctype_b_loc is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 22:16:21,650 WARN L675 CHandler]: The function iswxdigit is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 22:16:21,650 WARN L675 CHandler]: The function time is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 22:16:21,650 WARN L675 CHandler]: The function fgets is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 22:16:21,658 INFO L206 MainTranslator]: Completed translation [2023-11-24 22:16:21,659 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:16:21 WrapperNode [2023-11-24 22:16:21,659 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:16:21,661 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 22:16:21,661 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 22:16:21,661 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 22:16:21,668 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:16:21" (1/1) ... [2023-11-24 22:16:21,699 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:16:21" (1/1) ... [2023-11-24 22:16:21,733 INFO L138 Inliner]: procedures = 504, calls = 69, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2023-11-24 22:16:21,734 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 22:16:21,735 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 22:16:21,735 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 22:16:21,735 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 22:16:21,744 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:16:21" (1/1) ... [2023-11-24 22:16:21,744 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:16:21" (1/1) ... [2023-11-24 22:16:21,749 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:16:21" (1/1) ... [2023-11-24 22:16:21,750 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:16:21" (1/1) ... [2023-11-24 22:16:21,760 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:16:21" (1/1) ... [2023-11-24 22:16:21,762 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:16:21" (1/1) ... [2023-11-24 22:16:21,766 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:16:21" (1/1) ... [2023-11-24 22:16:21,768 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:16:21" (1/1) ... [2023-11-24 22:16:21,773 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 22:16:21,774 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 22:16:21,774 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 22:16:21,774 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 22:16:21,775 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:16:21" (1/1) ... [2023-11-24 22:16:21,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2023-11-24 22:16:21,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi/z3 [2023-11-24 22:16:21,808 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2023-11-24 22:16:21,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2023-11-24 22:16:21,858 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2023-11-24 22:16:21,859 INFO L130 BoogieDeclarations]: Found specification of procedure printLine [2023-11-24 22:16:21,859 INFO L138 BoogieDeclarations]: Found implementation of procedure printLine [2023-11-24 22:16:21,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 22:16:21,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-24 22:16:21,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 22:16:21,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 22:16:21,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 22:16:21,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-24 22:16:21,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 22:16:21,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-24 22:16:21,860 INFO L130 BoogieDeclarations]: Found specification of procedure time [2023-11-24 22:16:21,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2023-11-24 22:16:22,064 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 22:16:22,066 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 22:16:22,342 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 22:16:22,413 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 22:16:22,414 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-24 22:16:22,421 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:16:22 BoogieIcfgContainer [2023-11-24 22:16:22,421 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 22:16:22,422 INFO L112 PluginConnector]: ------------------------CodeCheck---------------------------- [2023-11-24 22:16:22,422 INFO L270 PluginConnector]: Initializing CodeCheck... [2023-11-24 22:16:22,432 INFO L274 PluginConnector]: CodeCheck initialized [2023-11-24 22:16:22,432 INFO L184 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:16:22" (1/1) ... [2023-11-24 22:16:22,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:16:22,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:16:22,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 16 states and 18 transitions. [2023-11-24 22:16:22,525 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2023-11-24 22:16:22,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 22:16:22,531 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:16:22,533 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-24 22:16:22,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi/cvc4 [2023-11-24 22:16:22,535 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-24 22:16:22,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi/cvc4 --incremental --print-success --lang smt (2)] Waiting until timeout for monitored process [2023-11-24 22:16:22,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:16:22,795 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 22:16:22,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:16:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:16:23,254 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 22:16:23,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:16:23,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi/cvc4 --incremental --print-success --lang smt (2)] Forceful destruction successful, exit code 0 [2023-11-24 22:16:23,505 WARN L476 CodeCheckObserver]: This program is UNSAFE, Check terminated with 1 iterations. [2023-11-24 22:16:23,529 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~nondet103 [2023-11-24 22:16:23,539 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 24.11 10:16:23 ImpRootNode [2023-11-24 22:16:23,539 INFO L131 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2023-11-24 22:16:23,540 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-24 22:16:23,540 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-24 22:16:23,540 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-24 22:16:23,541 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:16:22" (3/4) ... [2023-11-24 22:16:23,543 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-24 22:16:23,544 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-24 22:16:23,545 INFO L158 Benchmark]: Toolchain (without parser) took 3611.81ms. Allocated memory was 77.6MB in the beginning and 100.7MB in the end (delta: 23.1MB). Free memory was 49.7MB in the beginning and 68.7MB in the end (delta: -19.0MB). Peak memory consumption was 5.6MB. Max. memory is 16.1GB. [2023-11-24 22:16:23,545 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 77.6MB. Free memory is still 53.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 22:16:23,546 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1725.62ms. Allocated memory was 77.6MB in the beginning and 100.7MB in the end (delta: 23.1MB). Free memory was 49.5MB in the beginning and 52.6MB in the end (delta: -3.0MB). Peak memory consumption was 28.4MB. Max. memory is 16.1GB. [2023-11-24 22:16:23,547 INFO L158 Benchmark]: Boogie Procedure Inliner took 73.49ms. Allocated memory is still 100.7MB. Free memory was 52.6MB in the beginning and 49.5MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 22:16:23,547 INFO L158 Benchmark]: Boogie Preprocessor took 38.43ms. Allocated memory is still 100.7MB. Free memory was 49.5MB in the beginning and 47.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 22:16:23,548 INFO L158 Benchmark]: RCFGBuilder took 647.48ms. Allocated memory is still 100.7MB. Free memory was 47.5MB in the beginning and 58.5MB in the end (delta: -11.0MB). Peak memory consumption was 9.7MB. Max. memory is 16.1GB. [2023-11-24 22:16:23,549 INFO L158 Benchmark]: CodeCheck took 1117.58ms. Allocated memory is still 100.7MB. Free memory was 58.5MB in the beginning and 69.3MB in the end (delta: -10.8MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2023-11-24 22:16:23,549 INFO L158 Benchmark]: Witness Printer took 3.97ms. Allocated memory is still 100.7MB. Free memory was 69.3MB in the beginning and 68.7MB in the end (delta: 582.0kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 22:16:23,553 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: 1.0s, 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, 0.2s 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: 1572]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: overapproximation of atoi at line 1560, overapproximation of large string literal at line 1581. 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); [L1581] 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) [L1581] 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] [L1582] CALL CWE191_Integer_Underflow__int_fgets_predec_32_bad() [L1550] int data; [L1551] int *dataPtr1 = &data; [L1552] int *dataPtr2 = &data; [L1553] data = 0 [L1555] EXPR \read(*dataPtr1) [L1555] int data = *dataPtr1; [L1557] char inputBuffer[(3 * sizeof(data) + 2)] = ""; [L1558] COND TRUE, EXPR fgets(inputBuffer, (3 * sizeof(data) + 2), stdin) != ((void *)0) [L1560] EXPR data = atoi(inputBuffer) [L1557] char inputBuffer[(3 * sizeof(data) + 2)] = ""; [L1556-L1566] { char inputBuffer[(3 * sizeof(data) + 2)] = ""; if (fgets(inputBuffer, (3 * sizeof(data) + 2), stdin) != ((void *)0)) { data = atoi(inputBuffer); } else { printLine("fgets() failed."); } } [L1567] EXPR *dataPtr1 = data [L1554-L1568] { int data = *dataPtr1; { char inputBuffer[(3 * sizeof(data) + 2)] = ""; if (fgets(inputBuffer, (3 * sizeof(data) + 2), stdin) != ((void *)0)) { data = atoi(inputBuffer); } else { printLine("fgets() failed."); } } *dataPtr1 = data; } [L1570] EXPR \read(*dataPtr2) [L1570] int data = *dataPtr2; [L1572] --data VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, data=-2147483648, data={7:0}, dataPtr1={7:0}, dataPtr2={7:0}, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 77.6MB. Free memory is still 53.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1725.62ms. Allocated memory was 77.6MB in the beginning and 100.7MB in the end (delta: 23.1MB). Free memory was 49.5MB in the beginning and 52.6MB in the end (delta: -3.0MB). Peak memory consumption was 28.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 73.49ms. Allocated memory is still 100.7MB. Free memory was 52.6MB in the beginning and 49.5MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.43ms. Allocated memory is still 100.7MB. Free memory was 49.5MB in the beginning and 47.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 647.48ms. Allocated memory is still 100.7MB. Free memory was 47.5MB in the beginning and 58.5MB in the end (delta: -11.0MB). Peak memory consumption was 9.7MB. Max. memory is 16.1GB. * CodeCheck took 1117.58ms. Allocated memory is still 100.7MB. Free memory was 58.5MB in the beginning and 69.3MB in the end (delta: -10.8MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Witness Printer took 3.97ms. Allocated memory is still 100.7MB. Free memory was 69.3MB in the beginning and 68.7MB in the end (delta: 582.0kB). 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~nondet103 - 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 [2023-11-24 22:16:23,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_268839b2-470b-41f8-a8a9-6e5696b76d6d/bin/ukojak-verify-afCqCEvfdi/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample