./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_predec_06_bad.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm/config/KojakReach.xml -i ../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_predec_06_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm/config/svcomp-Overflow-64bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm --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 4a62b2de8890ec813aa852c8a58f76205e53f8ff37d53e2956fb619261f9feea --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 21:51:21,069 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 21:51:21,151 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm/config/svcomp-Overflow-64bit-Kojak_Default.epf [2024-11-13 21:51:21,164 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 21:51:21,166 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck.Interpolating solver [2024-11-13 21:51:21,214 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 21:51:21,217 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 21:51:21,217 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2024-11-13 21:51:21,218 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 21:51:21,218 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 21:51:21,219 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 21:51:21,219 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 21:51:21,219 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 21:51:21,219 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 21:51:21,220 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 21:51:21,221 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 21:51:21,222 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 21:51:21,222 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 21:51:21,222 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-13 21:51:21,222 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 21:51:21,222 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 21:51:21,222 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 21:51:21,223 INFO L151 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2024-11-13 21:51:21,223 INFO L153 SettingsManager]: * Timeout in seconds=1000000 [2024-11-13 21:51:21,223 INFO L153 SettingsManager]: * Theory for external solver=ALL [2024-11-13 21:51:21,223 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 21:51:21,223 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2024-11-13 21:51:21,223 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 21:51:21,223 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 21:51:21,223 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 21:51:21,223 INFO L153 SettingsManager]: * Trace refinement strategy=PENGUIN [2024-11-13 21:51:21,224 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 21:51:21,224 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm 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 -> 4a62b2de8890ec813aa852c8a58f76205e53f8ff37d53e2956fb619261f9feea [2024-11-13 21:51:21,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 21:51:21,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 21:51:21,660 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 21:51:21,661 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 21:51:21,662 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 21:51:21,663 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm/../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_predec_06_bad.i Unable to find full path for "g++" [2024-11-13 21:51:23,922 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 21:51:24,575 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 21:51:24,576 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_predec_06_bad.i [2024-11-13 21:51:24,616 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm/data/ff7455e99/b887340f66be422ab5823fd5cbdc3249/FLAG4e12ca8c3 [2024-11-13 21:51:24,643 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm/data/ff7455e99/b887340f66be422ab5823fd5cbdc3249 [2024-11-13 21:51:24,646 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 21:51:24,651 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 21:51:24,653 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 21:51:24,654 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 21:51:24,659 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 21:51:24,660 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 09:51:24" (1/1) ... [2024-11-13 21:51:24,662 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31e932fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:51:24, skipping insertion in model container [2024-11-13 21:51:24,663 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 09:51:24" (1/1) ... [2024-11-13 21:51:24,747 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 21:51:26,142 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 21:51:26,154 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 21:51:26,262 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 21:51:26,429 INFO L204 MainTranslator]: Completed translation [2024-11-13 21:51:26,429 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:51:26 WrapperNode [2024-11-13 21:51:26,430 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 21:51:26,432 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 21:51:26,432 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 21:51:26,432 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 21:51:26,441 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:51:26" (1/1) ... [2024-11-13 21:51:26,480 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:51:26" (1/1) ... [2024-11-13 21:51:26,523 INFO L138 Inliner]: procedures = 498, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 70 [2024-11-13 21:51:26,525 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 21:51:26,526 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 21:51:26,526 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 21:51:26,526 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 21:51:26,536 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:51:26" (1/1) ... [2024-11-13 21:51:26,537 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:51:26" (1/1) ... [2024-11-13 21:51:26,540 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:51:26" (1/1) ... [2024-11-13 21:51:26,545 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:51:26" (1/1) ... [2024-11-13 21:51:26,555 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:51:26" (1/1) ... [2024-11-13 21:51:26,562 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:51:26" (1/1) ... [2024-11-13 21:51:26,563 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:51:26" (1/1) ... [2024-11-13 21:51:26,569 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:51:26" (1/1) ... [2024-11-13 21:51:26,575 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 21:51:26,576 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 21:51:26,579 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 21:51:26,580 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 21:51:26,581 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:51:26" (1/1) ... [2024-11-13 21:51:26,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2024-11-13 21:51:26,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm/z3 [2024-11-13 21:51:26,630 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2024-11-13 21:51:26,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2024-11-13 21:51:26,657 INFO L130 BoogieDeclarations]: Found specification of procedure printLine [2024-11-13 21:51:26,657 INFO L138 BoogieDeclarations]: Found implementation of procedure printLine [2024-11-13 21:51:26,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 21:51:26,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 21:51:26,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 21:51:26,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-13 21:51:26,858 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 21:51:26,861 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 21:51:27,044 INFO L? ?]: Removed 20 outVars from TransFormulas that were not future-live. [2024-11-13 21:51:27,044 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 21:51:27,105 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 21:51:27,106 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-13 21:51:27,106 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 09:51:27 BoogieIcfgContainer [2024-11-13 21:51:27,106 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 21:51:27,107 INFO L112 PluginConnector]: ------------------------CodeCheck---------------------------- [2024-11-13 21:51:27,107 INFO L270 PluginConnector]: Initializing CodeCheck... [2024-11-13 21:51:27,120 INFO L274 PluginConnector]: CodeCheck initialized [2024-11-13 21:51:27,120 INFO L184 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 09:51:27" (1/1) ... [2024-11-13 21:51:27,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 21:51:27,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-13 21:51:27,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 19 states and 23 transitions. [2024-11-13 21:51:27,203 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2024-11-13 21:51:27,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-13 21:51:27,209 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-13 21:51:27,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 21:51:27,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 21:51:27,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 21:51:27,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-13 21:51:27,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 19 states and 22 transitions. [2024-11-13 21:51:27,607 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2024-11-13 21:51:27,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-13 21:51:27,610 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-13 21:51:27,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 21:51:27,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 21:51:27,679 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-13 21:51:27,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 21:51:27,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 21:51:27,812 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-13 21:51:27,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 21:51:27,864 WARN L473 CodeCheckObserver]: This program is UNSAFE, Check terminated with 2 iterations. [2024-11-13 21:51:27,907 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 13.11 09:51:27 ImpRootNode [2024-11-13 21:51:27,908 INFO L131 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2024-11-13 21:51:27,908 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-13 21:51:27,909 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-13 21:51:27,910 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-13 21:51:27,911 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 09:51:27" (3/4) ... [2024-11-13 21:51:27,914 INFO L145 WitnessPrinter]: No result that supports witness generation found [2024-11-13 21:51:27,915 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-13 21:51:27,919 INFO L158 Benchmark]: Toolchain (without parser) took 3266.17ms. Allocated memory is still 142.6MB. Free memory was 116.0MB in the beginning and 79.9MB in the end (delta: 36.1MB). Peak memory consumption was 39.1MB. Max. memory is 16.1GB. [2024-11-13 21:51:27,919 INFO L158 Benchmark]: CDTParser took 0.42ms. Allocated memory is still 167.8MB. Free memory is still 104.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 21:51:27,920 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1777.84ms. Allocated memory is still 142.6MB. Free memory was 115.6MB in the beginning and 55.3MB in the end (delta: 60.3MB). Peak memory consumption was 58.7MB. Max. memory is 16.1GB. [2024-11-13 21:51:27,920 INFO L158 Benchmark]: Boogie Procedure Inliner took 93.75ms. Allocated memory is still 142.6MB. Free memory was 55.3MB in the beginning and 52.9MB in the end (delta: 2.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-13 21:51:27,921 INFO L158 Benchmark]: Boogie Preprocessor took 48.99ms. Allocated memory is still 142.6MB. Free memory was 52.9MB in the beginning and 51.9MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 21:51:27,921 INFO L158 Benchmark]: RCFGBuilder took 530.55ms. Allocated memory is still 142.6MB. Free memory was 51.9MB in the beginning and 106.7MB in the end (delta: -54.9MB). Peak memory consumption was 13.9MB. Max. memory is 16.1GB. [2024-11-13 21:51:27,926 INFO L158 Benchmark]: CodeCheck took 800.52ms. Allocated memory is still 142.6MB. Free memory was 105.9MB in the beginning and 80.6MB in the end (delta: 25.3MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-11-13 21:51:27,926 INFO L158 Benchmark]: Witness Printer took 7.17ms. Allocated memory is still 142.6MB. Free memory was 80.6MB in the beginning and 79.9MB in the end (delta: 773.3kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 21:51:27,929 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, 19 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 0, PathProgramHistogramMax: 0, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 21 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2 mSDsluCounter, 17 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6 IncrementalHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 15 mSDtfsCounter, 6 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 64 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 2 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, 0.2s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 13 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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: 1570]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: overapproximation of atoi at line 1559, overapproximation of large string literal at line 1579, overapproximation of fgets at line 1557. 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); [L1548] static const int STATIC_CONST_FIVE = 5; [L1579] CALL printLine("Calling bad()...") VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, STATIC_CONST_FIVE=5, \old(line)={3:0}, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1414] COND TRUE line != ((void *)0) [L1579] RET printLine("Calling bad()...") VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, STATIC_CONST_FIVE=5, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1580] CALL CWE191_Integer_Underflow__int_fgets_predec_06_bad() [L1551] int data; [L1552] data = 0 VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, STATIC_CONST_FIVE=5, data=0, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1553] COND TRUE STATIC_CONST_FIVE==5 [L1556] char inputBuffer[(3 * sizeof(data) + 2)] = ""; VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, STATIC_CONST_FIVE=5, data=0, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1557] COND TRUE fgets(inputBuffer, (3 * sizeof(data) + 2), stdin) != ((void *)0) [L1559] data = atoi(inputBuffer) [L1567] COND TRUE STATIC_CONST_FIVE==5 VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, STATIC_CONST_FIVE=5, data=-2147483648, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1570] --data VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, STATIC_CONST_FIVE=5, 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 0.42ms. Allocated memory is still 167.8MB. Free memory is still 104.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1777.84ms. Allocated memory is still 142.6MB. Free memory was 115.6MB in the beginning and 55.3MB in the end (delta: 60.3MB). Peak memory consumption was 58.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 93.75ms. Allocated memory is still 142.6MB. Free memory was 55.3MB in the beginning and 52.9MB in the end (delta: 2.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 48.99ms. Allocated memory is still 142.6MB. Free memory was 52.9MB in the beginning and 51.9MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 530.55ms. Allocated memory is still 142.6MB. Free memory was 51.9MB in the beginning and 106.7MB in the end (delta: -54.9MB). Peak memory consumption was 13.9MB. Max. memory is 16.1GB. * CodeCheck took 800.52ms. Allocated memory is still 142.6MB. Free memory was 105.9MB in the beginning and 80.6MB in the end (delta: 25.3MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Witness Printer took 7.17ms. Allocated memory is still 142.6MB. Free memory was 80.6MB in the beginning and 79.9MB in the end (delta: 773.3kB). There was no memory consumed. Max. memory is 16.1GB. RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2024-11-13 21:51:27,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm/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 Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm/config/KojakReach.xml -i ../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_predec_06_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm/config/svcomp-Overflow-64bit-Kojak_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm --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 4a62b2de8890ec813aa852c8a58f76205e53f8ff37d53e2956fb619261f9feea --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 21:51:31,181 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 21:51:31,344 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm/config/svcomp-Overflow-64bit-Kojak_Bitvector.epf [2024-11-13 21:51:31,405 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 21:51:31,407 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 21:51:31,407 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2024-11-13 21:51:31,408 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 21:51:31,408 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 21:51:31,409 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 21:51:31,410 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 21:51:31,410 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 21:51:31,410 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 21:51:31,410 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 21:51:31,411 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 21:51:31,412 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 21:51:31,413 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-13 21:51:31,413 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 21:51:31,413 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-13 21:51:31,413 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-13 21:51:31,413 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 21:51:31,414 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 21:51:31,414 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 21:51:31,414 INFO L151 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2024-11-13 21:51:31,414 INFO L153 SettingsManager]: * Timeout in seconds=1000000 [2024-11-13 21:51:31,414 INFO L153 SettingsManager]: * Theory for external solver=ALL [2024-11-13 21:51:31,414 INFO L153 SettingsManager]: * Command for calling external solver=cvc4 --incremental --print-success --lang smt [2024-11-13 21:51:31,414 INFO L153 SettingsManager]: * Choose which separate solver to use for tracechecks=External_ModelsAndUnsatCoreMode [2024-11-13 21:51:31,415 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 21:51:31,415 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2024-11-13 21:51:31,415 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 21:51:31,415 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 21:51:31,415 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 21:51:31,415 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2024-11-13 21:51:31,415 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-13 21:51:31,416 INFO L153 SettingsManager]: * Use separate solver for trace checks=false [2024-11-13 21:51:31,416 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm 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 -> 4a62b2de8890ec813aa852c8a58f76205e53f8ff37d53e2956fb619261f9feea [2024-11-13 21:51:31,810 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 21:51:31,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 21:51:31,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 21:51:31,825 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 21:51:31,826 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 21:51:31,827 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm/../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_predec_06_bad.i Unable to find full path for "g++" [2024-11-13 21:51:34,035 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 21:51:34,567 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 21:51:34,567 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_predec_06_bad.i [2024-11-13 21:51:34,598 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm/data/21c81fbd6/2e2c03133389476da7f85f7695c40d50/FLAG287d680ef [2024-11-13 21:51:34,616 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm/data/21c81fbd6/2e2c03133389476da7f85f7695c40d50 [2024-11-13 21:51:34,619 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 21:51:34,622 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 21:51:34,624 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 21:51:34,624 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 21:51:34,633 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 21:51:34,634 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 09:51:34" (1/1) ... [2024-11-13 21:51:34,635 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7460b692 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:51:34, skipping insertion in model container [2024-11-13 21:51:34,635 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 09:51:34" (1/1) ... [2024-11-13 21:51:34,717 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 21:51:36,163 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 21:51:36,181 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 21:51:36,341 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 21:51:36,508 INFO L204 MainTranslator]: Completed translation [2024-11-13 21:51:36,509 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:51:36 WrapperNode [2024-11-13 21:51:36,509 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 21:51:36,510 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 21:51:36,510 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 21:51:36,510 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 21:51:36,518 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:51:36" (1/1) ... [2024-11-13 21:51:36,549 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:51:36" (1/1) ... [2024-11-13 21:51:36,586 INFO L138 Inliner]: procedures = 503, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 69 [2024-11-13 21:51:36,587 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 21:51:36,590 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 21:51:36,590 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 21:51:36,591 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 21:51:36,600 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:51:36" (1/1) ... [2024-11-13 21:51:36,601 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:51:36" (1/1) ... [2024-11-13 21:51:36,605 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:51:36" (1/1) ... [2024-11-13 21:51:36,605 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:51:36" (1/1) ... [2024-11-13 21:51:36,614 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:51:36" (1/1) ... [2024-11-13 21:51:36,616 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:51:36" (1/1) ... [2024-11-13 21:51:36,619 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:51:36" (1/1) ... [2024-11-13 21:51:36,620 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:51:36" (1/1) ... [2024-11-13 21:51:36,624 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 21:51:36,625 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 21:51:36,625 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 21:51:36,625 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 21:51:36,627 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:51:36" (1/1) ... [2024-11-13 21:51:36,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2024-11-13 21:51:36,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm/z3 [2024-11-13 21:51:36,666 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2024-11-13 21:51:36,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2024-11-13 21:51:36,703 INFO L130 BoogieDeclarations]: Found specification of procedure printLine [2024-11-13 21:51:36,704 INFO L138 BoogieDeclarations]: Found implementation of procedure printLine [2024-11-13 21:51:36,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2024-11-13 21:51:36,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 21:51:36,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 21:51:36,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 21:51:36,921 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 21:51:36,923 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 21:51:37,090 INFO L? ?]: Removed 19 outVars from TransFormulas that were not future-live. [2024-11-13 21:51:37,090 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 21:51:37,146 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 21:51:37,146 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-13 21:51:37,146 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 09:51:37 BoogieIcfgContainer [2024-11-13 21:51:37,147 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 21:51:37,147 INFO L112 PluginConnector]: ------------------------CodeCheck---------------------------- [2024-11-13 21:51:37,148 INFO L270 PluginConnector]: Initializing CodeCheck... [2024-11-13 21:51:37,161 INFO L274 PluginConnector]: CodeCheck initialized [2024-11-13 21:51:37,162 INFO L184 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 09:51:37" (1/1) ... [2024-11-13 21:51:37,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 21:51:37,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-13 21:51:37,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 19 states and 23 transitions. [2024-11-13 21:51:37,263 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2024-11-13 21:51:37,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-13 21:51:37,267 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-13 21:51:37,268 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 21:51:37,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm/cvc4 [2024-11-13 21:51:37,273 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 21:51:37,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm/cvc4 --incremental --print-success --lang smt (2)] Waiting until timeout for monitored process [2024-11-13 21:51:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 21:51:37,453 ERROR L567 CodeCheckObserver]: First Tracecheck threw exception Proofs are not supported [2024-11-13 21:51:37,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 21:51:37,499 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-13 21:51:37,506 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 21:51:37,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 21:51:37,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm/cvc4 --incremental --print-success --lang smt (2)] Ended with exit code 0 [2024-11-13 21:51:37,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-13 21:51:37,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 21 states and 27 transitions. [2024-11-13 21:51:37,663 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2024-11-13 21:51:37,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-13 21:51:37,665 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-13 21:51:37,665 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 21:51:37,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm/cvc4 [2024-11-13 21:51:37,667 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 21:51:37,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2024-11-13 21:51:37,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 21:51:37,912 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-13 21:51:37,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 21:51:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 21:51:38,093 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-13 21:51:38,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 21:51:38,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm/cvc4 --incremental --print-success --lang smt (3)] Forceful destruction successful, exit code 0 [2024-11-13 21:51:38,166 WARN L473 CodeCheckObserver]: This program is UNSAFE, Check terminated with 2 iterations. [2024-11-13 21:51:38,210 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 13.11 09:51:38 ImpRootNode [2024-11-13 21:51:38,211 INFO L131 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2024-11-13 21:51:38,211 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-13 21:51:38,211 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-13 21:51:38,212 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-13 21:51:38,213 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 09:51:37" (3/4) ... [2024-11-13 21:51:38,218 INFO L145 WitnessPrinter]: No result that supports witness generation found [2024-11-13 21:51:38,219 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-13 21:51:38,220 INFO L158 Benchmark]: Toolchain (without parser) took 3598.26ms. Allocated memory is still 109.1MB. Free memory was 82.3MB in the beginning and 52.2MB in the end (delta: 30.1MB). Peak memory consumption was 35.9MB. Max. memory is 16.1GB. [2024-11-13 21:51:38,220 INFO L158 Benchmark]: CDTParser took 0.50ms. Allocated memory is still 83.9MB. Free memory is still 64.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 21:51:38,221 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1885.87ms. Allocated memory is still 109.1MB. Free memory was 82.1MB in the beginning and 62.4MB in the end (delta: 19.7MB). Peak memory consumption was 58.1MB. Max. memory is 16.1GB. [2024-11-13 21:51:38,221 INFO L158 Benchmark]: Boogie Procedure Inliner took 76.74ms. Allocated memory is still 109.1MB. Free memory was 62.4MB in the beginning and 59.9MB in the end (delta: 2.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 21:51:38,222 INFO L158 Benchmark]: Boogie Preprocessor took 34.40ms. Allocated memory is still 109.1MB. Free memory was 59.3MB in the beginning and 58.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 21:51:38,222 INFO L158 Benchmark]: RCFGBuilder took 521.60ms. Allocated memory is still 109.1MB. Free memory was 58.1MB in the beginning and 41.3MB in the end (delta: 16.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-13 21:51:38,222 INFO L158 Benchmark]: CodeCheck took 1063.20ms. Allocated memory is still 109.1MB. Free memory was 41.3MB in the beginning and 52.8MB in the end (delta: -11.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 21:51:38,223 INFO L158 Benchmark]: Witness Printer took 7.84ms. Allocated memory is still 109.1MB. Free memory was 52.8MB in the beginning and 52.2MB in the end (delta: 635.6kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-13 21:51:38,230 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, 19 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 0, PathProgramHistogramMax: 0, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 15 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8 mSDsluCounter, 23 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11 IncrementalHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 17 mSDtfsCounter, 11 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 70 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 2 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, 0.1s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 17 SizeOfPredicates, 0 NumberOfNonLiveVariables, 36 ConjunctsInSsa, 2 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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: 1570]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: overapproximation of atoi at line 1559, overapproximation of large string literal at line 1579, overapproximation of fgets at line 1557. 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); [L1548] static const int STATIC_CONST_FIVE = 5; [L1579] CALL printLine("Calling bad()...") VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, STATIC_CONST_FIVE=5, \old(line)={3:0}, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1414] COND TRUE line != ((void *)0) [L1579] RET printLine("Calling bad()...") VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, STATIC_CONST_FIVE=5, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1580] CALL CWE191_Integer_Underflow__int_fgets_predec_06_bad() [L1551] int data; [L1552] data = 0 VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, STATIC_CONST_FIVE=5, data=0, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1553] COND TRUE STATIC_CONST_FIVE==5 [L1556] char inputBuffer[(3 * sizeof(data) + 2)] = ""; VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, STATIC_CONST_FIVE=5, data=0, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1557] COND TRUE fgets(inputBuffer, (3 * sizeof(data) + 2), stdin) != ((void *)0) [L1559] data = atoi(inputBuffer) [L1567] COND TRUE STATIC_CONST_FIVE==5 VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, STATIC_CONST_FIVE=5, data=-2147483648, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1570] --data VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, STATIC_CONST_FIVE=5, 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 0.50ms. Allocated memory is still 83.9MB. Free memory is still 64.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1885.87ms. Allocated memory is still 109.1MB. Free memory was 82.1MB in the beginning and 62.4MB in the end (delta: 19.7MB). Peak memory consumption was 58.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 76.74ms. Allocated memory is still 109.1MB. Free memory was 62.4MB in the beginning and 59.9MB in the end (delta: 2.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 34.40ms. Allocated memory is still 109.1MB. Free memory was 59.3MB in the beginning and 58.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 521.60ms. Allocated memory is still 109.1MB. Free memory was 58.1MB in the beginning and 41.3MB in the end (delta: 16.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * CodeCheck took 1063.20ms. Allocated memory is still 109.1MB. Free memory was 41.3MB in the beginning and 52.8MB in the end (delta: -11.5MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 7.84ms. Allocated memory is still 109.1MB. Free memory was 52.8MB in the beginning and 52.2MB in the end (delta: 635.6kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2024-11-13 21:51:38,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed24d849-167c-4273-9a97-cb5f794dd965/bin/ukojak-verify-EEHR8qb7sm/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