./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_rand_sub_44_bad.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_rand_sub_44_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash a1b665e81b209ec1deb7c6e73a8211a3a042d9bef010adb8f6cd4b8cff4a8cda --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 14:44:44,282 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 14:44:44,284 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 14:44:44,304 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 14:44:44,304 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 14:44:44,305 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 14:44:44,306 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 14:44:44,308 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 14:44:44,310 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 14:44:44,310 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 14:44:44,311 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 14:44:44,312 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 14:44:44,313 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 14:44:44,314 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 14:44:44,315 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 14:44:44,317 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 14:44:44,317 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 14:44:44,319 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 14:44:44,320 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 14:44:44,322 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 14:44:44,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 14:44:44,325 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 14:44:44,326 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 14:44:44,327 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 14:44:44,330 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 14:44:44,331 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 14:44:44,331 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 14:44:44,332 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 14:44:44,333 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 14:44:44,333 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 14:44:44,334 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 14:44:44,334 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 14:44:44,335 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 14:44:44,336 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 14:44:44,337 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 14:44:44,337 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 14:44:44,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 14:44:44,337 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 14:44:44,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 14:44:44,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 14:44:44,339 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 14:44:44,339 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-64bit-Automizer_Default.epf [2022-12-13 14:44:44,361 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 14:44:44,361 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 14:44:44,362 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 14:44:44,362 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 14:44:44,362 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 14:44:44,363 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 14:44:44,363 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 14:44:44,363 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 14:44:44,364 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 14:44:44,364 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 14:44:44,364 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 14:44:44,364 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 14:44:44,364 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 14:44:44,364 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 14:44:44,365 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 14:44:44,365 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 14:44:44,365 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-12-13 14:44:44,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 14:44:44,365 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 14:44:44,365 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 14:44:44,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 14:44:44,366 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 14:44:44,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 14:44:44,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:44:44,366 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 14:44:44,366 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 14:44:44,366 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 14:44:44,367 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 14:44:44,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 14:44:44,367 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 14:44:44,367 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 14:44:44,367 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 14:44:44,367 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 14:44:44,367 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 14:44:44,368 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a1b665e81b209ec1deb7c6e73a8211a3a042d9bef010adb8f6cd4b8cff4a8cda [2022-12-13 14:44:44,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 14:44:44,577 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 14:44:44,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 14:44:44,580 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 14:44:44,581 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 14:44:44,582 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_rand_sub_44_bad.i [2022-12-13 14:44:47,157 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 14:44:47,448 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 14:44:47,448 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_rand_sub_44_bad.i [2022-12-13 14:44:47,464 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8/data/0cf5cb611/3da732249b5c41a5a01af680d695b22c/FLAG7759bd526 [2022-12-13 14:44:47,477 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8/data/0cf5cb611/3da732249b5c41a5a01af680d695b22c [2022-12-13 14:44:47,479 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 14:44:47,480 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 14:44:47,481 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 14:44:47,481 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 14:44:47,484 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 14:44:47,484 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:44:47" (1/1) ... [2022-12-13 14:44:47,485 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b43b0d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:47, skipping insertion in model container [2022-12-13 14:44:47,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:44:47" (1/1) ... [2022-12-13 14:44:47,492 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 14:44:47,568 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 14:44:47,846 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-13 14:44:48,167 WARN L623 FunctionHandler]: Unknown extern function puts [2022-12-13 14:44:48,172 WARN L623 FunctionHandler]: Unknown extern function __ctype_b_loc [2022-12-13 14:44:48,174 WARN L623 FunctionHandler]: Unknown extern function __ctype_b_loc [2022-12-13 14:44:48,176 WARN L623 FunctionHandler]: Unknown extern function iswxdigit [2022-12-13 14:44:48,177 WARN L623 FunctionHandler]: Unknown extern function iswxdigit [2022-12-13 14:44:48,203 WARN L623 FunctionHandler]: Unknown extern function time [2022-12-13 14:44:48,204 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:44:48,212 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 14:44:48,229 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-13 14:44:48,274 WARN L623 FunctionHandler]: Unknown extern function puts [2022-12-13 14:44:48,275 WARN L623 FunctionHandler]: Unknown extern function __ctype_b_loc [2022-12-13 14:44:48,276 WARN L623 FunctionHandler]: Unknown extern function __ctype_b_loc [2022-12-13 14:44:48,278 WARN L623 FunctionHandler]: Unknown extern function iswxdigit [2022-12-13 14:44:48,279 WARN L623 FunctionHandler]: Unknown extern function iswxdigit [2022-12-13 14:44:48,285 WARN L623 FunctionHandler]: Unknown extern function time [2022-12-13 14:44:48,286 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:44:48,383 INFO L208 MainTranslator]: Completed translation [2022-12-13 14:44:48,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:48 WrapperNode [2022-12-13 14:44:48,384 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 14:44:48,385 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 14:44:48,385 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 14:44:48,385 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 14:44:48,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:48" (1/1) ... [2022-12-13 14:44:48,419 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:48" (1/1) ... [2022-12-13 14:44:48,439 INFO L138 Inliner]: procedures = 501, calls = 56, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 60 [2022-12-13 14:44:48,440 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 14:44:48,440 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 14:44:48,440 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 14:44:48,440 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 14:44:48,447 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:48" (1/1) ... [2022-12-13 14:44:48,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:48" (1/1) ... [2022-12-13 14:44:48,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:48" (1/1) ... [2022-12-13 14:44:48,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:48" (1/1) ... [2022-12-13 14:44:48,456 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:48" (1/1) ... [2022-12-13 14:44:48,458 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:48" (1/1) ... [2022-12-13 14:44:48,460 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:48" (1/1) ... [2022-12-13 14:44:48,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:48" (1/1) ... [2022-12-13 14:44:48,465 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 14:44:48,466 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 14:44:48,466 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 14:44:48,466 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 14:44:48,467 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:48" (1/1) ... [2022-12-13 14:44:48,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:44:48,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:44:48,492 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 14:44:48,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 14:44:48,522 INFO L130 BoogieDeclarations]: Found specification of procedure printLine [2022-12-13 14:44:48,522 INFO L138 BoogieDeclarations]: Found implementation of procedure printLine [2022-12-13 14:44:48,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 14:44:48,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 14:44:48,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 14:44:48,523 INFO L130 BoogieDeclarations]: Found specification of procedure time [2022-12-13 14:44:48,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 14:44:48,635 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 14:44:48,636 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 14:44:48,745 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 14:44:48,749 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 14:44:48,749 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-13 14:44:48,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:44:48 BoogieIcfgContainer [2022-12-13 14:44:48,751 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 14:44:48,752 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 14:44:48,752 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 14:44:48,755 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 14:44:48,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 02:44:47" (1/3) ... [2022-12-13 14:44:48,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5274d4f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:44:48, skipping insertion in model container [2022-12-13 14:44:48,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:48" (2/3) ... [2022-12-13 14:44:48,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5274d4f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:44:48, skipping insertion in model container [2022-12-13 14:44:48,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:44:48" (3/3) ... [2022-12-13 14:44:48,757 INFO L112 eAbstractionObserver]: Analyzing ICFG CWE191_Integer_Underflow__int_rand_sub_44_bad.i [2022-12-13 14:44:48,771 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 14:44:48,771 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-13 14:44:48,803 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:44:48,808 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6417b990, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:44:48,808 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 14:44:48,811 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 19 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 14:44:48,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 14:44:48,816 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:44:48,816 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:44:48,817 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-12-13 14:44:48,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:44:48,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1415283626, now seen corresponding path program 1 times [2022-12-13 14:44:48,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:44:48,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219693816] [2022-12-13 14:44:48,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:44:48,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:44:48,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:44:48,983 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:44:49,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:44:49,051 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 14:44:49,053 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 14:44:49,054 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 2 remaining) [2022-12-13 14:44:49,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 2 remaining) [2022-12-13 14:44:49,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 14:44:49,061 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2022-12-13 14:44:49,065 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 14:44:49,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 02:44:49 BoogieIcfgContainer [2022-12-13 14:44:49,088 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 14:44:49,089 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 14:44:49,089 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 14:44:49,089 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 14:44:49,090 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:44:48" (3/4) ... [2022-12-13 14:44:49,093 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-12-13 14:44:49,093 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 14:44:49,094 INFO L158 Benchmark]: Toolchain (without parser) took 1613.44ms. Allocated memory is still 132.1MB. Free memory was 94.4MB in the beginning and 87.7MB in the end (delta: 6.7MB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. [2022-12-13 14:44:49,094 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 109.1MB. Free memory was 84.3MB in the beginning and 84.3MB in the end (delta: 24.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 14:44:49,095 INFO L158 Benchmark]: CACSL2BoogieTranslator took 902.92ms. Allocated memory is still 132.1MB. Free memory was 94.4MB in the beginning and 79.0MB in the end (delta: 15.4MB). Peak memory consumption was 55.0MB. Max. memory is 16.1GB. [2022-12-13 14:44:49,095 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.10ms. Allocated memory is still 132.1MB. Free memory was 79.0MB in the beginning and 75.6MB in the end (delta: 3.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 14:44:49,096 INFO L158 Benchmark]: Boogie Preprocessor took 25.08ms. Allocated memory is still 132.1MB. Free memory was 75.6MB in the beginning and 74.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 14:44:49,096 INFO L158 Benchmark]: RCFGBuilder took 284.96ms. Allocated memory is still 132.1MB. Free memory was 74.0MB in the beginning and 60.1MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-13 14:44:49,097 INFO L158 Benchmark]: TraceAbstraction took 336.01ms. Allocated memory is still 132.1MB. Free memory was 60.1MB in the beginning and 88.5MB in the end (delta: -28.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 14:44:49,097 INFO L158 Benchmark]: Witness Printer took 4.02ms. Allocated memory is still 132.1MB. Free memory was 88.5MB in the beginning and 87.7MB in the end (delta: 887.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 14:44:49,100 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 109.1MB. Free memory was 84.3MB in the beginning and 84.3MB in the end (delta: 24.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 902.92ms. Allocated memory is still 132.1MB. Free memory was 94.4MB in the beginning and 79.0MB in the end (delta: 15.4MB). Peak memory consumption was 55.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.10ms. Allocated memory is still 132.1MB. Free memory was 79.0MB in the beginning and 75.6MB in the end (delta: 3.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.08ms. Allocated memory is still 132.1MB. Free memory was 75.6MB in the beginning and 74.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 284.96ms. Allocated memory is still 132.1MB. Free memory was 74.0MB in the beginning and 60.1MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 336.01ms. Allocated memory is still 132.1MB. Free memory was 60.1MB in the beginning and 88.5MB in the end (delta: -28.5MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 4.02ms. Allocated memory is still 132.1MB. Free memory was 88.5MB in the beginning and 87.7MB in the end (delta: 887.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 1551]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: overapproximation of bitwiseXor at line 1560, overapproximation of bitwiseAnd at line 1560. 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); VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1566] CALL printLine("Calling bad()...") VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1, line={2:0}] [L1414] COND TRUE line != ((void *)0) [L1566] RET printLine("Calling bad()...") VAL [\old(argc)=2147483649, argc=2147483649, argv={2147483648:2147483650}, argv={2147483648:2147483650}, GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1567] CALL CWE191_Integer_Underflow__int_rand_sub_44_bad() [L1557] int data; [L1558] void (*funcPtr) (int) = badSink; [L1559] data = 0 [L1560] EXPR rand() & 1 ? (((unsigned)rand()<<30) ^ ((unsigned)rand()<<15) ^ rand()) : -(((unsigned)rand()<<30) ^ ((unsigned)rand()<<15) ^ rand()) - 1 [L1560] EXPR rand() & 1 ? (((unsigned)rand()<<30) ^ ((unsigned)rand()<<15) ^ rand()) : -(((unsigned)rand()<<30) ^ ((unsigned)rand()<<15) ^ rand()) - 1 VAL [={-1:0}, data=0, GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1, rand()=65535, rand()=1, rand()=0, rand()=2147483647, rand() & 1 ? (((unsigned)rand()<<30) ^ ((unsigned)rand()<<15) ^ rand()) : -(((unsigned)rand()<<30) ^ ((unsigned)rand()<<15) ^ rand()) - 1=-2147483648] [L1560] data = ((int)(rand() & 1 ? (((unsigned)rand()<<30) ^ ((unsigned)rand()<<15) ^ rand()) : -(((unsigned)rand()<<30) ^ ((unsigned)rand()<<15) ^ rand()) - 1)) [L1561] CALL funcPtr(data) [L1551] data - 1 VAL [\old(data)=-2147483648, data=-2147483648, GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] - UnprovableResult [Line: 1551]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, 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: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-12-13 14:44:49,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_rand_sub_44_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash a1b665e81b209ec1deb7c6e73a8211a3a042d9bef010adb8f6cd4b8cff4a8cda --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 14:44:50,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 14:44:50,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 14:44:50,806 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 14:44:50,806 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 14:44:50,807 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 14:44:50,809 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 14:44:50,810 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 14:44:50,812 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 14:44:50,813 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 14:44:50,814 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 14:44:50,815 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 14:44:50,816 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 14:44:50,817 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 14:44:50,818 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 14:44:50,819 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 14:44:50,820 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 14:44:50,821 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 14:44:50,822 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 14:44:50,824 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 14:44:50,825 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 14:44:50,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 14:44:50,828 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 14:44:50,828 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 14:44:50,832 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 14:44:50,832 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 14:44:50,833 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 14:44:50,834 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 14:44:50,834 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 14:44:50,835 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 14:44:50,835 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 14:44:50,836 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 14:44:50,837 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 14:44:50,837 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 14:44:50,838 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 14:44:50,838 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 14:44:50,839 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 14:44:50,839 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 14:44:50,839 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 14:44:50,840 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 14:44:50,840 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 14:44:50,841 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-64bit-Automizer_Bitvector.epf [2022-12-13 14:44:50,866 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 14:44:50,867 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 14:44:50,867 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 14:44:50,867 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 14:44:50,868 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 14:44:50,868 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 14:44:50,868 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 14:44:50,869 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 14:44:50,869 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 14:44:50,869 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 14:44:50,869 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 14:44:50,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 14:44:50,870 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 14:44:50,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 14:44:50,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 14:44:50,870 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 14:44:50,870 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 14:44:50,870 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-12-13 14:44:50,871 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 14:44:50,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 14:44:50,871 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 14:44:50,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 14:44:50,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 14:44:50,871 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 14:44:50,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 14:44:50,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:44:50,872 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 14:44:50,872 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 14:44:50,872 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 14:44:50,872 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 14:44:50,873 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 14:44:50,873 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 14:44:50,873 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 14:44:50,873 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 14:44:50,873 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 14:44:50,873 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 14:44:50,873 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 14:44:50,874 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a1b665e81b209ec1deb7c6e73a8211a3a042d9bef010adb8f6cd4b8cff4a8cda [2022-12-13 14:44:51,113 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 14:44:51,127 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 14:44:51,129 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 14:44:51,129 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 14:44:51,130 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 14:44:51,130 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_rand_sub_44_bad.i [2022-12-13 14:44:53,800 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 14:44:54,061 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 14:44:54,062 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_rand_sub_44_bad.i [2022-12-13 14:44:54,079 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8/data/9c1d4944e/aea0f510aef9481b80a1e164ce9f7bd5/FLAG736d101d3 [2022-12-13 14:44:54,093 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8/data/9c1d4944e/aea0f510aef9481b80a1e164ce9f7bd5 [2022-12-13 14:44:54,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 14:44:54,097 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 14:44:54,098 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 14:44:54,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 14:44:54,102 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 14:44:54,102 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:44:54" (1/1) ... [2022-12-13 14:44:54,103 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a24a70c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:54, skipping insertion in model container [2022-12-13 14:44:54,103 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:44:54" (1/1) ... [2022-12-13 14:44:54,110 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 14:44:54,158 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 14:44:54,405 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-13 14:44:54,675 WARN L623 FunctionHandler]: Unknown extern function puts [2022-12-13 14:44:54,686 WARN L623 FunctionHandler]: Unknown extern function __ctype_b_loc [2022-12-13 14:44:54,687 WARN L623 FunctionHandler]: Unknown extern function __ctype_b_loc [2022-12-13 14:44:54,689 WARN L623 FunctionHandler]: Unknown extern function iswxdigit [2022-12-13 14:44:54,689 WARN L623 FunctionHandler]: Unknown extern function iswxdigit [2022-12-13 14:44:54,710 WARN L623 FunctionHandler]: Unknown extern function time [2022-12-13 14:44:54,711 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:44:54,721 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 14:44:54,735 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-13 14:44:54,766 WARN L623 FunctionHandler]: Unknown extern function puts [2022-12-13 14:44:54,767 WARN L623 FunctionHandler]: Unknown extern function __ctype_b_loc [2022-12-13 14:44:54,768 WARN L623 FunctionHandler]: Unknown extern function __ctype_b_loc [2022-12-13 14:44:54,770 WARN L623 FunctionHandler]: Unknown extern function iswxdigit [2022-12-13 14:44:54,770 WARN L623 FunctionHandler]: Unknown extern function iswxdigit [2022-12-13 14:44:54,774 WARN L623 FunctionHandler]: Unknown extern function time [2022-12-13 14:44:54,774 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:44:54,886 INFO L208 MainTranslator]: Completed translation [2022-12-13 14:44:54,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:54 WrapperNode [2022-12-13 14:44:54,886 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 14:44:54,887 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 14:44:54,887 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 14:44:54,887 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 14:44:54,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:54" (1/1) ... [2022-12-13 14:44:54,915 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:54" (1/1) ... [2022-12-13 14:44:54,934 INFO L138 Inliner]: procedures = 506, calls = 56, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 60 [2022-12-13 14:44:54,934 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 14:44:54,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 14:44:54,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 14:44:54,935 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 14:44:54,945 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:54" (1/1) ... [2022-12-13 14:44:54,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:54" (1/1) ... [2022-12-13 14:44:54,949 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:54" (1/1) ... [2022-12-13 14:44:54,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:54" (1/1) ... [2022-12-13 14:44:54,958 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:54" (1/1) ... [2022-12-13 14:44:54,959 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:54" (1/1) ... [2022-12-13 14:44:54,961 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:54" (1/1) ... [2022-12-13 14:44:54,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:54" (1/1) ... [2022-12-13 14:44:54,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 14:44:54,967 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 14:44:54,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 14:44:54,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 14:44:54,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:54" (1/1) ... [2022-12-13 14:44:54,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:44:54,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:44:54,995 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 14:44:54,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 14:44:55,030 INFO L130 BoogieDeclarations]: Found specification of procedure printLine [2022-12-13 14:44:55,030 INFO L138 BoogieDeclarations]: Found implementation of procedure printLine [2022-12-13 14:44:55,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 14:44:55,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 14:44:55,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 14:44:55,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 14:44:55,031 INFO L130 BoogieDeclarations]: Found specification of procedure time [2022-12-13 14:44:55,156 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 14:44:55,158 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 14:44:55,281 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 14:44:55,287 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 14:44:55,287 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-13 14:44:55,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:44:55 BoogieIcfgContainer [2022-12-13 14:44:55,289 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 14:44:55,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 14:44:55,290 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 14:44:55,293 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 14:44:55,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 02:44:54" (1/3) ... [2022-12-13 14:44:55,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c98a1c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:44:55, skipping insertion in model container [2022-12-13 14:44:55,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:54" (2/3) ... [2022-12-13 14:44:55,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c98a1c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:44:55, skipping insertion in model container [2022-12-13 14:44:55,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:44:55" (3/3) ... [2022-12-13 14:44:55,295 INFO L112 eAbstractionObserver]: Analyzing ICFG CWE191_Integer_Underflow__int_rand_sub_44_bad.i [2022-12-13 14:44:55,309 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 14:44:55,309 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-13 14:44:55,346 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:44:55,351 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2704c6a1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:44:55,352 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 14:44:55,359 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 19 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 14:44:55,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 14:44:55,366 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:44:55,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:44:55,367 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-12-13 14:44:55,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:44:55,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1415283626, now seen corresponding path program 1 times [2022-12-13 14:44:55,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:44:55,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [824204524] [2022-12-13 14:44:55,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:44:55,391 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:44:55,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:44:55,392 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:44:55,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-13 14:44:55,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:44:55,500 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:44:55,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:44:55,559 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2022-12-13 14:44:55,561 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 14:44:55,562 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 2 remaining) [2022-12-13 14:44:55,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 2 remaining) [2022-12-13 14:44:55,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-13 14:44:55,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:44:55,771 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2022-12-13 14:44:55,784 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 14:44:55,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 02:44:55 BoogieIcfgContainer [2022-12-13 14:44:55,860 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 14:44:55,861 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 14:44:55,861 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 14:44:55,861 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 14:44:55,861 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:44:55" (3/4) ... [2022-12-13 14:44:55,864 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-13 14:44:55,896 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8/witness.graphml [2022-12-13 14:44:55,896 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 14:44:55,897 INFO L158 Benchmark]: Toolchain (without parser) took 1800.53ms. Allocated memory was 60.8MB in the beginning and 73.4MB in the end (delta: 12.6MB). Free memory was 29.9MB in the beginning and 31.3MB in the end (delta: -1.4MB). Peak memory consumption was 8.1MB. Max. memory is 16.1GB. [2022-12-13 14:44:55,898 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 46.1MB. Free memory was 25.1MB in the beginning and 25.0MB in the end (delta: 54.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 14:44:55,898 INFO L158 Benchmark]: CACSL2BoogieTranslator took 788.59ms. Allocated memory was 60.8MB in the beginning and 73.4MB in the end (delta: 12.6MB). Free memory was 29.7MB in the beginning and 32.0MB in the end (delta: -2.3MB). Peak memory consumption was 14.6MB. Max. memory is 16.1GB. [2022-12-13 14:44:55,898 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.07ms. Allocated memory is still 73.4MB. Free memory was 32.0MB in the beginning and 28.9MB in the end (delta: 3.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 14:44:55,899 INFO L158 Benchmark]: Boogie Preprocessor took 31.64ms. Allocated memory is still 73.4MB. Free memory was 28.9MB in the beginning and 45.5MB in the end (delta: -16.6MB). Peak memory consumption was 2.2MB. Max. memory is 16.1GB. [2022-12-13 14:44:55,899 INFO L158 Benchmark]: RCFGBuilder took 321.98ms. Allocated memory is still 73.4MB. Free memory was 45.5MB in the beginning and 32.1MB in the end (delta: 13.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-13 14:44:55,899 INFO L158 Benchmark]: TraceAbstraction took 569.91ms. Allocated memory is still 73.4MB. Free memory was 31.2MB in the beginning and 33.7MB in the end (delta: -2.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 14:44:55,900 INFO L158 Benchmark]: Witness Printer took 35.82ms. Allocated memory is still 73.4MB. Free memory was 33.7MB in the beginning and 31.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 14:44:55,901 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 46.1MB. Free memory was 25.1MB in the beginning and 25.0MB in the end (delta: 54.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 788.59ms. Allocated memory was 60.8MB in the beginning and 73.4MB in the end (delta: 12.6MB). Free memory was 29.7MB in the beginning and 32.0MB in the end (delta: -2.3MB). Peak memory consumption was 14.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.07ms. Allocated memory is still 73.4MB. Free memory was 32.0MB in the beginning and 28.9MB in the end (delta: 3.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 31.64ms. Allocated memory is still 73.4MB. Free memory was 28.9MB in the beginning and 45.5MB in the end (delta: -16.6MB). Peak memory consumption was 2.2MB. Max. memory is 16.1GB. * RCFGBuilder took 321.98ms. Allocated memory is still 73.4MB. Free memory was 45.5MB in the beginning and 32.1MB in the end (delta: 13.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 569.91ms. Allocated memory is still 73.4MB. Free memory was 31.2MB in the beginning and 33.7MB in the end (delta: -2.5MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 35.82ms. Allocated memory is still 73.4MB. Free memory was 33.7MB in the beginning and 31.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 1551]: integer overflow possible integer overflow possible We found a 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); VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1566] CALL printLine("Calling bad()...") VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1, line={2:0}] [L1414] COND TRUE line != ((void *)0) [L1566] RET printLine("Calling bad()...") VAL [\old(argc)=12, argc=12, argv={13:12}, argv={13:12}, GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1567] CALL CWE191_Integer_Underflow__int_rand_sub_44_bad() [L1557] int data; [L1558] void (*funcPtr) (int) = badSink; [L1559] data = 0 [L1560] EXPR rand() & 1 ? (((unsigned)rand()<<30) ^ ((unsigned)rand()<<15) ^ rand()) : -(((unsigned)rand()<<30) ^ ((unsigned)rand()<<15) ^ rand()) - 1 [L1560] EXPR rand() & 1 ? (((unsigned)rand()<<30) ^ ((unsigned)rand()<<15) ^ rand()) : -(((unsigned)rand()<<30) ^ ((unsigned)rand()<<15) ^ rand()) - 1 VAL [={-1:0}, data=0, GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1, rand()=0, rand()=0, rand()=0, rand()=2147483647, rand() & 1 ? (((unsigned)rand()<<30) ^ ((unsigned)rand()<<15) ^ rand()) : -(((unsigned)rand()<<30) ^ ((unsigned)rand()<<15) ^ rand()) - 1=-2147483648] [L1560] data = ((int)(rand() & 1 ? (((unsigned)rand()<<30) ^ ((unsigned)rand()<<15) ^ rand()) : -(((unsigned)rand()<<30) ^ ((unsigned)rand()<<15) ^ rand()) - 1)) [L1561] CALL funcPtr(data) [L1551] data - 1 VAL [\old(data)=-2147483648, data=-2147483648, GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] - UnprovableResult [Line: 1551]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, 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: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-12-13 14:44:55,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80b2db74-3d81-4f7d-80f7-6fa85672c357/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW)