./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/Juliet_Test/CWE190_Integer_Overflow__int_rand_add_16_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_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/bin/ukojak-verify-EEHR8qb7sm/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/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_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/bin/ukojak-verify-EEHR8qb7sm/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/bin/ukojak-verify-EEHR8qb7sm/config/KojakReach.xml -i ../../sv-benchmarks/c/Juliet_Test/CWE190_Integer_Overflow__int_rand_add_16_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/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_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/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 7fef12d1e11be574a2190c43d2264a80588dec69d8f3b879c2f67e93630d3a6c --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 20:57:57,467 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 20:57:57,565 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/bin/ukojak-verify-EEHR8qb7sm/config/svcomp-Overflow-64bit-Kojak_Default.epf [2024-11-13 20:57:57,571 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 20:57:57,571 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck.Interpolating solver [2024-11-13 20:57:57,597 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 20:57:57,598 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 20:57:57,599 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2024-11-13 20:57:57,599 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 20:57:57,599 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 20:57:57,599 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 20:57:57,600 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 20:57:57,600 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 20:57:57,600 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 20:57:57,600 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 20:57:57,600 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 20:57:57,600 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 20:57:57,600 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 20:57:57,601 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-13 20:57:57,601 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 20:57:57,601 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 20:57:57,601 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 20:57:57,601 INFO L151 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2024-11-13 20:57:57,601 INFO L153 SettingsManager]: * Timeout in seconds=1000000 [2024-11-13 20:57:57,601 INFO L153 SettingsManager]: * Theory for external solver=ALL [2024-11-13 20:57:57,602 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 20:57:57,602 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2024-11-13 20:57:57,602 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 20:57:57,602 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 20:57:57,602 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 20:57:57,602 INFO L153 SettingsManager]: * Trace refinement strategy=PENGUIN [2024-11-13 20:57:57,602 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 20:57:57,602 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_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/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 -> 7fef12d1e11be574a2190c43d2264a80588dec69d8f3b879c2f67e93630d3a6c [2024-11-13 20:57:57,921 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 20:57:57,932 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 20:57:57,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 20:57:57,938 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 20:57:57,938 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 20:57:57,940 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/bin/ukojak-verify-EEHR8qb7sm/../../sv-benchmarks/c/Juliet_Test/CWE190_Integer_Overflow__int_rand_add_16_bad.i Unable to find full path for "g++" [2024-11-13 20:57:59,825 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 20:58:00,199 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 20:58:00,200 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/sv-benchmarks/c/Juliet_Test/CWE190_Integer_Overflow__int_rand_add_16_bad.i [2024-11-13 20:58:00,227 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/bin/ukojak-verify-EEHR8qb7sm/data/228445f8c/6f01964038a648b98c352deb0e4322a5/FLAGced26f3bb [2024-11-13 20:58:00,391 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/bin/ukojak-verify-EEHR8qb7sm/data/228445f8c/6f01964038a648b98c352deb0e4322a5 [2024-11-13 20:58:00,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 20:58:00,400 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 20:58:00,402 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 20:58:00,406 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 20:58:00,411 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 20:58:00,416 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 08:58:00" (1/1) ... [2024-11-13 20:58:00,417 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ad0dadd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:58:00, skipping insertion in model container [2024-11-13 20:58:00,423 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 08:58:00" (1/1) ... [2024-11-13 20:58:00,499 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 20:58:01,669 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 20:58:01,687 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 20:58:01,860 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 20:58:02,059 INFO L204 MainTranslator]: Completed translation [2024-11-13 20:58:02,060 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:58:02 WrapperNode [2024-11-13 20:58:02,060 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 20:58:02,061 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 20:58:02,063 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 20:58:02,063 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 20:58:02,075 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:58:02" (1/1) ... [2024-11-13 20:58:02,114 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:58:02" (1/1) ... [2024-11-13 20:58:02,156 INFO L138 Inliner]: procedures = 497, calls = 23, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 104 [2024-11-13 20:58:02,159 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 20:58:02,160 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 20:58:02,160 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 20:58:02,160 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 20:58:02,167 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:58:02" (1/1) ... [2024-11-13 20:58:02,167 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:58:02" (1/1) ... [2024-11-13 20:58:02,170 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:58:02" (1/1) ... [2024-11-13 20:58:02,171 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:58:02" (1/1) ... [2024-11-13 20:58:02,176 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:58:02" (1/1) ... [2024-11-13 20:58:02,180 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:58:02" (1/1) ... [2024-11-13 20:58:02,182 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:58:02" (1/1) ... [2024-11-13 20:58:02,183 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:58:02" (1/1) ... [2024-11-13 20:58:02,185 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 20:58:02,188 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 20:58:02,188 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 20:58:02,189 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 20:58:02,190 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:58:02" (1/1) ... [2024-11-13 20:58:02,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2024-11-13 20:58:02,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/bin/ukojak-verify-EEHR8qb7sm/z3 [2024-11-13 20:58:02,233 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/bin/ukojak-verify-EEHR8qb7sm/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2024-11-13 20:58:02,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/bin/ukojak-verify-EEHR8qb7sm/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2024-11-13 20:58:02,259 INFO L130 BoogieDeclarations]: Found specification of procedure printLine [2024-11-13 20:58:02,259 INFO L138 BoogieDeclarations]: Found implementation of procedure printLine [2024-11-13 20:58:02,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 20:58:02,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 20:58:02,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 20:58:02,444 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 20:58:02,446 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 20:58:02,666 INFO L? ?]: Removed 55 outVars from TransFormulas that were not future-live. [2024-11-13 20:58:02,667 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 20:58:02,959 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 20:58:02,959 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-13 20:58:02,959 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 08:58:02 BoogieIcfgContainer [2024-11-13 20:58:02,960 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 20:58:02,960 INFO L112 PluginConnector]: ------------------------CodeCheck---------------------------- [2024-11-13 20:58:02,960 INFO L270 PluginConnector]: Initializing CodeCheck... [2024-11-13 20:58:02,970 INFO L274 PluginConnector]: CodeCheck initialized [2024-11-13 20:58:02,971 INFO L184 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 08:58:02" (1/1) ... [2024-11-13 20:58:02,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 20:58:03,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-13 20:58:03,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 14 states and 15 transitions. [2024-11-13 20:58:03,027 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2024-11-13 20:58:03,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-13 20:58:03,031 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-13 20:58:03,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 20:58:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 20:58:03,611 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 20:58:03,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-13 20:58:03,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2024-11-13 20:58:03,668 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2024-11-13 20:58:03,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-13 20:58:03,669 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-13 20:58:03,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 20:58:03,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 20:58:03,881 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-13 20:58:03,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 20:58:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 20:58:03,999 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-13 20:58:04,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 20:58:04,061 WARN L473 CodeCheckObserver]: This program is UNSAFE, Check terminated with 2 iterations. [2024-11-13 20:58:04,095 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 13.11 08:58:04 ImpRootNode [2024-11-13 20:58:04,096 INFO L131 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2024-11-13 20:58:04,096 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-13 20:58:04,097 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-13 20:58:04,097 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-13 20:58:04,098 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 08:58:02" (3/4) ... [2024-11-13 20:58:04,101 INFO L145 WitnessPrinter]: No result that supports witness generation found [2024-11-13 20:58:04,102 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-13 20:58:04,104 INFO L158 Benchmark]: Toolchain (without parser) took 3703.56ms. Allocated memory is still 117.4MB. Free memory was 89.9MB in the beginning and 85.2MB in the end (delta: 4.7MB). Peak memory consumption was 9.5MB. Max. memory is 16.1GB. [2024-11-13 20:58:04,105 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 117.4MB. Free memory is still 75.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 20:58:04,105 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1658.59ms. Allocated memory is still 117.4MB. Free memory was 89.7MB in the beginning and 79.9MB in the end (delta: 9.8MB). Peak memory consumption was 66.3MB. Max. memory is 16.1GB. [2024-11-13 20:58:04,106 INFO L158 Benchmark]: Boogie Procedure Inliner took 97.84ms. Allocated memory is still 117.4MB. Free memory was 79.9MB in the beginning and 77.3MB in the end (delta: 2.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 20:58:04,106 INFO L158 Benchmark]: Boogie Preprocessor took 25.82ms. Allocated memory is still 117.4MB. Free memory was 77.3MB in the beginning and 76.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 20:58:04,109 INFO L158 Benchmark]: RCFGBuilder took 771.50ms. Allocated memory is still 117.4MB. Free memory was 76.1MB in the beginning and 35.3MB in the end (delta: 40.8MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. [2024-11-13 20:58:04,110 INFO L158 Benchmark]: CodeCheck took 1135.65ms. Allocated memory is still 117.4MB. Free memory was 35.3MB in the beginning and 85.2MB in the end (delta: -49.9MB). Peak memory consumption was 10.3MB. Max. memory is 16.1GB. [2024-11-13 20:58:04,110 INFO L158 Benchmark]: Witness Printer took 5.26ms. Allocated memory is still 117.4MB. Free memory was 85.2MB in the beginning and 85.2MB in the end (delta: 13.7kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 20:58:04,112 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, 14 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 0, PathProgramHistogramMax: 0, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 13 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2 mSDsluCounter, 8 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7 IncrementalHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 6 mSDtfsCounter, 7 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 42 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, 0.4s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 14 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: 1560]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: overapproximation of large string literal at line 1569, overapproximation of bitwiseOr at line 1554. 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); [L1569] CALL printLine("Calling bad()...") VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, \old(line)={1:0}, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1414] COND TRUE line != ((void *)0) [L1569] RET 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] [L1570] CALL CWE190_Integer_Overflow__int_rand_add_16_bad() [L1550] int data; [L1551] data = 0 [L1552] COND TRUE 1 [L1554] EXPR rand() & 1 ? (((unsigned)rand()<<30) ^ ((unsigned)rand()<<15) ^ rand()) : -(((unsigned)rand()<<30) ^ ((unsigned)rand()<<15) ^ rand()) - 1 [L1554] EXPR ((unsigned)rand()<<30) ^ ((unsigned)rand()<<15) [L1554] EXPR ((unsigned)rand()<<30) ^ ((unsigned)rand()<<15) ^ rand() [L1554] EXPR rand() & 1 ? (((unsigned)rand()<<30) ^ ((unsigned)rand()<<15) ^ rand()) : -(((unsigned)rand()<<30) ^ ((unsigned)rand()<<15) ^ rand()) - 1 [L1554] data = ((int)(rand() & 1 ? (((unsigned)rand()<<30) ^ ((unsigned)rand()<<15) ^ rand()) : -(((unsigned)rand()<<30) ^ ((unsigned)rand()<<15) ^ rand()) - 1)) [L1557] COND TRUE 1 VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, data=2147483647, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1560] data + 1 VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, 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 0.39ms. Allocated memory is still 117.4MB. Free memory is still 75.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1658.59ms. Allocated memory is still 117.4MB. Free memory was 89.7MB in the beginning and 79.9MB in the end (delta: 9.8MB). Peak memory consumption was 66.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 97.84ms. Allocated memory is still 117.4MB. Free memory was 79.9MB in the beginning and 77.3MB in the end (delta: 2.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 25.82ms. Allocated memory is still 117.4MB. Free memory was 77.3MB in the beginning and 76.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 771.50ms. Allocated memory is still 117.4MB. Free memory was 76.1MB in the beginning and 35.3MB in the end (delta: 40.8MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. * CodeCheck took 1135.65ms. Allocated memory is still 117.4MB. Free memory was 35.3MB in the beginning and 85.2MB in the end (delta: -49.9MB). Peak memory consumption was 10.3MB. Max. memory is 16.1GB. * Witness Printer took 5.26ms. Allocated memory is still 117.4MB. Free memory was 85.2MB in the beginning and 85.2MB in the end (delta: 13.7kB). 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 20:58:04,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/bin/ukojak-verify-EEHR8qb7sm/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/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/bin/ukojak-verify-EEHR8qb7sm/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/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_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/bin/ukojak-verify-EEHR8qb7sm/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/bin/ukojak-verify-EEHR8qb7sm/config/KojakReach.xml -i ../../sv-benchmarks/c/Juliet_Test/CWE190_Integer_Overflow__int_rand_add_16_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/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_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/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 7fef12d1e11be574a2190c43d2264a80588dec69d8f3b879c2f67e93630d3a6c --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 20:58:06,807 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 20:58:06,937 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/bin/ukojak-verify-EEHR8qb7sm/config/svcomp-Overflow-64bit-Kojak_Bitvector.epf [2024-11-13 20:58:07,000 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 20:58:07,013 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 20:58:07,013 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2024-11-13 20:58:07,014 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 20:58:07,014 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 20:58:07,014 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 20:58:07,014 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 20:58:07,015 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 20:58:07,015 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 20:58:07,015 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 20:58:07,015 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 20:58:07,015 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 20:58:07,015 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-13 20:58:07,015 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 20:58:07,015 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-13 20:58:07,016 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-13 20:58:07,016 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 20:58:07,016 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 20:58:07,016 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 20:58:07,016 INFO L151 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2024-11-13 20:58:07,016 INFO L153 SettingsManager]: * Timeout in seconds=1000000 [2024-11-13 20:58:07,016 INFO L153 SettingsManager]: * Theory for external solver=ALL [2024-11-13 20:58:07,016 INFO L153 SettingsManager]: * Command for calling external solver=cvc4 --incremental --print-success --lang smt [2024-11-13 20:58:07,017 INFO L153 SettingsManager]: * Choose which separate solver to use for tracechecks=External_ModelsAndUnsatCoreMode [2024-11-13 20:58:07,017 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 20:58:07,017 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2024-11-13 20:58:07,017 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 20:58:07,017 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 20:58:07,017 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 20:58:07,017 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2024-11-13 20:58:07,017 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-13 20:58:07,018 INFO L153 SettingsManager]: * Use separate solver for trace checks=false [2024-11-13 20:58:07,018 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_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/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 -> 7fef12d1e11be574a2190c43d2264a80588dec69d8f3b879c2f67e93630d3a6c [2024-11-13 20:58:07,339 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 20:58:07,351 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 20:58:07,354 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 20:58:07,356 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 20:58:07,356 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 20:58:07,358 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/bin/ukojak-verify-EEHR8qb7sm/../../sv-benchmarks/c/Juliet_Test/CWE190_Integer_Overflow__int_rand_add_16_bad.i Unable to find full path for "g++" [2024-11-13 20:58:09,458 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 20:58:09,909 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 20:58:09,910 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/sv-benchmarks/c/Juliet_Test/CWE190_Integer_Overflow__int_rand_add_16_bad.i [2024-11-13 20:58:09,952 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/bin/ukojak-verify-EEHR8qb7sm/data/c77e9d2bd/0565cab51e1b486ea1808a2f0fb3a67a/FLAG8ea533575 [2024-11-13 20:58:09,981 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/bin/ukojak-verify-EEHR8qb7sm/data/c77e9d2bd/0565cab51e1b486ea1808a2f0fb3a67a [2024-11-13 20:58:09,984 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 20:58:09,987 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 20:58:09,988 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 20:58:09,989 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 20:58:09,994 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 20:58:09,995 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 08:58:09" (1/1) ... [2024-11-13 20:58:09,997 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36088a30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:58:09, skipping insertion in model container [2024-11-13 20:58:09,998 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 08:58:09" (1/1) ... [2024-11-13 20:58:10,057 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 20:58:11,334 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 20:58:11,348 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 20:58:11,475 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 20:58:11,636 INFO L204 MainTranslator]: Completed translation [2024-11-13 20:58:11,637 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:58:11 WrapperNode [2024-11-13 20:58:11,637 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 20:58:11,638 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 20:58:11,638 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 20:58:11,638 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 20:58:11,644 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:58:11" (1/1) ... [2024-11-13 20:58:11,673 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:58:11" (1/1) ... [2024-11-13 20:58:11,695 INFO L138 Inliner]: procedures = 502, calls = 23, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 64 [2024-11-13 20:58:11,695 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 20:58:11,696 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 20:58:11,696 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 20:58:11,696 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 20:58:11,704 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:58:11" (1/1) ... [2024-11-13 20:58:11,704 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:58:11" (1/1) ... [2024-11-13 20:58:11,709 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:58:11" (1/1) ... [2024-11-13 20:58:11,709 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:58:11" (1/1) ... [2024-11-13 20:58:11,728 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:58:11" (1/1) ... [2024-11-13 20:58:11,734 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:58:11" (1/1) ... [2024-11-13 20:58:11,741 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:58:11" (1/1) ... [2024-11-13 20:58:11,742 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:58:11" (1/1) ... [2024-11-13 20:58:11,748 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 20:58:11,749 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 20:58:11,749 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 20:58:11,749 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 20:58:11,754 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:58:11" (1/1) ... [2024-11-13 20:58:11,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2024-11-13 20:58:11,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/bin/ukojak-verify-EEHR8qb7sm/z3 [2024-11-13 20:58:11,795 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/bin/ukojak-verify-EEHR8qb7sm/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2024-11-13 20:58:11,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/bin/ukojak-verify-EEHR8qb7sm/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2024-11-13 20:58:11,829 INFO L130 BoogieDeclarations]: Found specification of procedure printLine [2024-11-13 20:58:11,830 INFO L138 BoogieDeclarations]: Found implementation of procedure printLine [2024-11-13 20:58:11,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 20:58:11,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 20:58:11,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 20:58:12,052 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 20:58:12,055 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 20:58:12,188 INFO L? ?]: Removed 26 outVars from TransFormulas that were not future-live. [2024-11-13 20:58:12,188 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 20:58:12,307 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 20:58:12,308 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-13 20:58:12,308 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 08:58:12 BoogieIcfgContainer [2024-11-13 20:58:12,308 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 20:58:12,309 INFO L112 PluginConnector]: ------------------------CodeCheck---------------------------- [2024-11-13 20:58:12,309 INFO L270 PluginConnector]: Initializing CodeCheck... [2024-11-13 20:58:12,320 INFO L274 PluginConnector]: CodeCheck initialized [2024-11-13 20:58:12,320 INFO L184 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 08:58:12" (1/1) ... [2024-11-13 20:58:12,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 20:58:12,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-13 20:58:12,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 14 states and 15 transitions. [2024-11-13 20:58:12,389 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2024-11-13 20:58:12,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-13 20:58:12,394 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-13 20:58:12,394 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 20:58:12,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/bin/ukojak-verify-EEHR8qb7sm/cvc4 [2024-11-13 20:58:12,399 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/bin/ukojak-verify-EEHR8qb7sm/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 20:58:12,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/bin/ukojak-verify-EEHR8qb7sm/cvc4 --incremental --print-success --lang smt (2)] Waiting until timeout for monitored process [2024-11-13 20:58:12,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 20:58:12,571 ERROR L567 CodeCheckObserver]: First Tracecheck threw exception Proofs are not supported [2024-11-13 20:58:12,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 20:58:12,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-13 20:58:12,664 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 20:58:12,690 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 20:58:12,692 ERROR L418 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/bin/ukojak-verify-EEHR8qb7sm/cvc4 --incremental --print-success --lang smt (2)] Exception during sending of exit command (exit): Broken pipe [2024-11-13 20:58:12,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/bin/ukojak-verify-EEHR8qb7sm/cvc4 --incremental --print-success --lang smt (2)] Ended with exit code 0 [2024-11-13 20:58:12,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-13 20:58:12,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2024-11-13 20:58:12,726 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2024-11-13 20:58:12,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-13 20:58:12,726 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-13 20:58:12,727 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 20:58:12,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/bin/ukojak-verify-EEHR8qb7sm/cvc4 [2024-11-13 20:58:12,731 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/bin/ukojak-verify-EEHR8qb7sm/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 20:58:12,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/bin/ukojak-verify-EEHR8qb7sm/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2024-11-13 20:58:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 20:58:12,911 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-13 20:58:12,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 20:58:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 20:58:13,054 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-13 20:58:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 20:58:13,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/bin/ukojak-verify-EEHR8qb7sm/cvc4 --incremental --print-success --lang smt (3)] Ended with exit code 0 [2024-11-13 20:58:13,099 WARN L473 CodeCheckObserver]: This program is UNSAFE, Check terminated with 2 iterations. [2024-11-13 20:58:13,138 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 13.11 08:58:13 ImpRootNode [2024-11-13 20:58:13,139 INFO L131 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2024-11-13 20:58:13,139 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-13 20:58:13,140 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-13 20:58:13,140 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-13 20:58:13,141 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 08:58:12" (3/4) ... [2024-11-13 20:58:13,145 INFO L145 WitnessPrinter]: No result that supports witness generation found [2024-11-13 20:58:13,146 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-13 20:58:13,147 INFO L158 Benchmark]: Toolchain (without parser) took 3160.35ms. Allocated memory is still 117.4MB. Free memory was 89.3MB in the beginning and 74.1MB in the end (delta: 15.2MB). Peak memory consumption was 16.5MB. Max. memory is 16.1GB. [2024-11-13 20:58:13,152 INFO L158 Benchmark]: CDTParser took 0.58ms. Allocated memory is still 117.4MB. Free memory was 84.8MB in the beginning and 84.7MB in the end (delta: 55.2kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 20:58:13,152 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1649.24ms. Allocated memory is still 117.4MB. Free memory was 89.3MB in the beginning and 68.1MB in the end (delta: 21.2MB). Peak memory consumption was 50.0MB. Max. memory is 16.1GB. [2024-11-13 20:58:13,152 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.40ms. Allocated memory is still 117.4MB. Free memory was 68.1MB in the beginning and 65.6MB in the end (delta: 2.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 20:58:13,153 INFO L158 Benchmark]: Boogie Preprocessor took 52.40ms. Allocated memory is still 117.4MB. Free memory was 65.6MB in the beginning and 63.2MB in the end (delta: 2.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 20:58:13,153 INFO L158 Benchmark]: RCFGBuilder took 559.36ms. Allocated memory is still 117.4MB. Free memory was 63.2MB in the beginning and 46.0MB in the end (delta: 17.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-13 20:58:13,154 INFO L158 Benchmark]: CodeCheck took 829.87ms. Allocated memory is still 117.4MB. Free memory was 46.0MB in the beginning and 74.8MB in the end (delta: -28.8MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 20:58:13,154 INFO L158 Benchmark]: Witness Printer took 6.49ms. Allocated memory is still 117.4MB. Free memory was 74.8MB in the beginning and 74.1MB in the end (delta: 703.0kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 20:58:13,161 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, 14 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 0, PathProgramHistogramMax: 0, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 16 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 6 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3 IncrementalHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 6 mSDtfsCounter, 3 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 46 GetRequests, 46 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: 0.1s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 31 ConjunctsInSsa, 1 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: 1560]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: overapproximation of large string literal at line 1569. 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); [L1569] CALL printLine("Calling bad()...") VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, \old(line)={1:0}, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1414] COND TRUE line != ((void *)0) [L1569] RET 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] [L1570] CALL CWE190_Integer_Overflow__int_rand_add_16_bad() [L1550] int data; [L1551] data = 0 [L1552] COND TRUE 1 [L1554] EXPR rand() & 1 ? (((unsigned)rand()<<30) ^ ((unsigned)rand()<<15) ^ rand()) : -(((unsigned)rand()<<30) ^ ((unsigned)rand()<<15) ^ rand()) - 1 [L1554] EXPR rand() & 1 ? (((unsigned)rand()<<30) ^ ((unsigned)rand()<<15) ^ rand()) : -(((unsigned)rand()<<30) ^ ((unsigned)rand()<<15) ^ rand()) - 1 [L1554] data = ((int)(rand() & 1 ? (((unsigned)rand()<<30) ^ ((unsigned)rand()<<15) ^ rand()) : -(((unsigned)rand()<<30) ^ ((unsigned)rand()<<15) ^ rand()) - 1)) [L1557] COND TRUE 1 VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, data=2147483647, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1560] data + 1 VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, 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 0.58ms. Allocated memory is still 117.4MB. Free memory was 84.8MB in the beginning and 84.7MB in the end (delta: 55.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1649.24ms. Allocated memory is still 117.4MB. Free memory was 89.3MB in the beginning and 68.1MB in the end (delta: 21.2MB). Peak memory consumption was 50.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.40ms. Allocated memory is still 117.4MB. Free memory was 68.1MB in the beginning and 65.6MB in the end (delta: 2.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 52.40ms. Allocated memory is still 117.4MB. Free memory was 65.6MB in the beginning and 63.2MB in the end (delta: 2.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 559.36ms. Allocated memory is still 117.4MB. Free memory was 63.2MB in the beginning and 46.0MB in the end (delta: 17.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * CodeCheck took 829.87ms. Allocated memory is still 117.4MB. Free memory was 46.0MB in the beginning and 74.8MB in the end (delta: -28.8MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 6.49ms. Allocated memory is still 117.4MB. Free memory was 74.8MB in the beginning and 74.1MB in the end (delta: 703.0kB). 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 20:58:13,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c1e1cc8-c3da-4f96-9f99-c3421feebd18/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