./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_multiply_66_bad.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_multiply_66_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash be3c297fe43a7bc8ea537df085d4f69535ba54c0205bfc09097f4c935400e3cd --- 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-38b53e6 [2022-11-26 00:37:05,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:37:05,380 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:37:05,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:37:05,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:37:05,416 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:37:05,417 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:37:05,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:37:05,421 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:37:05,423 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:37:05,424 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:37:05,425 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:37:05,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:37:05,427 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:37:05,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:37:05,429 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:37:05,430 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:37:05,431 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:37:05,433 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:37:05,435 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:37:05,436 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:37:05,438 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:37:05,439 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:37:05,440 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:37:05,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:37:05,444 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:37:05,444 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:37:05,445 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:37:05,445 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:37:05,446 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:37:05,447 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:37:05,447 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:37:05,448 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:37:05,449 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:37:05,450 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:37:05,450 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:37:05,451 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:37:05,451 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:37:05,452 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:37:05,453 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:37:05,453 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:37:05,454 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur/config/svcomp-Overflow-64bit-Taipan_Default.epf [2022-11-26 00:37:05,502 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:37:05,502 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:37:05,503 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:37:05,503 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:37:05,504 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:37:05,504 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:37:05,504 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:37:05,504 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:37:05,504 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:37:05,504 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:37:05,505 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:37:05,506 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:37:05,506 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:37:05,506 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:37:05,506 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:37:05,506 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:37:05,507 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:37:05,507 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:37:05,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:37:05,508 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 00:37:05,508 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:37:05,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:37:05,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:37:05,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:37:05,509 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:37:05,509 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-26 00:37:05,509 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:37:05,509 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:37:05,509 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:37:05,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:37:05,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:37:05,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:37:05,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:37:05,511 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:37:05,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:37:05,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:37:05,511 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:37:05,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:37:05,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:37:05,512 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:37:05,512 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be3c297fe43a7bc8ea537df085d4f69535ba54c0205bfc09097f4c935400e3cd [2022-11-26 00:37:05,834 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:37:05,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:37:05,872 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:37:05,873 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:37:05,873 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:37:05,875 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_multiply_66_bad.i [2022-11-26 00:37:09,027 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:37:09,500 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:37:09,505 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_multiply_66_bad.i [2022-11-26 00:37:09,531 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur/data/11d76065a/6472f7b4522644e993d89281632bcc8f/FLAG6aef95445 [2022-11-26 00:37:09,550 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur/data/11d76065a/6472f7b4522644e993d89281632bcc8f [2022-11-26 00:37:09,556 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:37:09,558 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:37:09,564 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:37:09,565 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:37:09,568 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:37:09,569 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:37:09" (1/1) ... [2022-11-26 00:37:09,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2990271d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:09, skipping insertion in model container [2022-11-26 00:37:09,570 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:37:09" (1/1) ... [2022-11-26 00:37:09,578 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:37:09,660 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:37:10,001 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-26 00:37:10,501 WARN L623 FunctionHandler]: Unknown extern function puts [2022-11-26 00:37:10,507 WARN L623 FunctionHandler]: Unknown extern function __ctype_b_loc [2022-11-26 00:37:10,509 WARN L623 FunctionHandler]: Unknown extern function __ctype_b_loc [2022-11-26 00:37:10,512 WARN L623 FunctionHandler]: Unknown extern function iswxdigit [2022-11-26 00:37:10,513 WARN L623 FunctionHandler]: Unknown extern function iswxdigit [2022-11-26 00:37:10,554 WARN L623 FunctionHandler]: Unknown extern function fgets [2022-11-26 00:37:10,564 WARN L623 FunctionHandler]: Unknown extern function time [2022-11-26 00:37:10,574 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:37:10,591 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:37:10,645 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-26 00:37:10,703 WARN L623 FunctionHandler]: Unknown extern function puts [2022-11-26 00:37:10,708 WARN L623 FunctionHandler]: Unknown extern function __ctype_b_loc [2022-11-26 00:37:10,710 WARN L623 FunctionHandler]: Unknown extern function __ctype_b_loc [2022-11-26 00:37:10,723 WARN L623 FunctionHandler]: Unknown extern function iswxdigit [2022-11-26 00:37:10,727 WARN L623 FunctionHandler]: Unknown extern function iswxdigit [2022-11-26 00:37:10,732 WARN L623 FunctionHandler]: Unknown extern function fgets [2022-11-26 00:37:10,734 WARN L623 FunctionHandler]: Unknown extern function time [2022-11-26 00:37:10,736 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:37:10,884 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:37:10,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:10 WrapperNode [2022-11-26 00:37:10,886 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:37:10,888 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:37:10,888 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:37:10,888 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:37:10,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:10" (1/1) ... [2022-11-26 00:37:10,924 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:10" (1/1) ... [2022-11-26 00:37:10,946 INFO L138 Inliner]: procedures = 501, calls = 67, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 61 [2022-11-26 00:37:10,947 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:37:10,948 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:37:10,948 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:37:10,948 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:37:10,957 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:10" (1/1) ... [2022-11-26 00:37:10,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:10" (1/1) ... [2022-11-26 00:37:10,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:10" (1/1) ... [2022-11-26 00:37:10,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:10" (1/1) ... [2022-11-26 00:37:10,975 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:10" (1/1) ... [2022-11-26 00:37:10,976 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:10" (1/1) ... [2022-11-26 00:37:10,978 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:10" (1/1) ... [2022-11-26 00:37:10,979 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:10" (1/1) ... [2022-11-26 00:37:10,982 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:37:10,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:37:10,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:37:10,983 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:37:10,984 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:10" (1/1) ... [2022-11-26 00:37:11,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:37:11,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:37:11,044 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:37:11,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:37:11,117 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2022-11-26 00:37:11,117 INFO L130 BoogieDeclarations]: Found specification of procedure printLine [2022-11-26 00:37:11,118 INFO L138 BoogieDeclarations]: Found implementation of procedure printLine [2022-11-26 00:37:11,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:37:11,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-26 00:37:11,118 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:37:11,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:37:11,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:37:11,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:37:11,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:37:11,120 INFO L130 BoogieDeclarations]: Found specification of procedure time [2022-11-26 00:37:11,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:37:11,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:37:11,369 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:37:11,371 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:37:11,535 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:37:11,567 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:37:11,567 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-26 00:37:11,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:37:11 BoogieIcfgContainer [2022-11-26 00:37:11,570 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:37:11,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:37:11,572 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:37:11,575 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:37:11,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:37:09" (1/3) ... [2022-11-26 00:37:11,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61349c40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:37:11, skipping insertion in model container [2022-11-26 00:37:11,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:10" (2/3) ... [2022-11-26 00:37:11,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61349c40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:37:11, skipping insertion in model container [2022-11-26 00:37:11,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:37:11" (3/3) ... [2022-11-26 00:37:11,578 INFO L112 eAbstractionObserver]: Analyzing ICFG CWE191_Integer_Underflow__int_fgets_multiply_66_bad.i [2022-11-26 00:37:11,597 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:37:11,598 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-26 00:37:11,644 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:37:11,651 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=FINITE_AUTOMATA, 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;@19957e74, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:37:11,651 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-26 00:37:11,655 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 10 states have (on average 1.4) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:37:11,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 00:37:11,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:37:11,664 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:37:11,664 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-26 00:37:11,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:37:11,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1767842661, now seen corresponding path program 1 times [2022-11-26 00:37:11,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:37:11,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534823168] [2022-11-26 00:37:11,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:37:11,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:37:11,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 00:37:11,889 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-26 00:37:11,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 00:37:11,952 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-26 00:37:11,954 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-26 00:37:11,956 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 2 remaining) [2022-11-26 00:37:11,958 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 2 remaining) [2022-11-26 00:37:11,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:37:11,964 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2022-11-26 00:37:11,969 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-26 00:37:11,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 12:37:11 BoogieIcfgContainer [2022-11-26 00:37:11,997 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-26 00:37:11,998 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-26 00:37:11,998 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-26 00:37:11,999 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-26 00:37:11,999 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:37:11" (3/4) ... [2022-11-26 00:37:12,003 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-26 00:37:12,003 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-26 00:37:12,005 INFO L158 Benchmark]: Toolchain (without parser) took 2446.42ms. Allocated memory is still 161.5MB. Free memory was 130.5MB in the beginning and 98.1MB in the end (delta: 32.4MB). Peak memory consumption was 34.4MB. Max. memory is 16.1GB. [2022-11-26 00:37:12,005 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 119.5MB. Free memory is still 87.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:37:12,006 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1322.99ms. Allocated memory is still 161.5MB. Free memory was 129.4MB in the beginning and 66.9MB in the end (delta: 62.5MB). Peak memory consumption was 62.9MB. Max. memory is 16.1GB. [2022-11-26 00:37:12,007 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.63ms. Allocated memory is still 161.5MB. Free memory was 66.9MB in the beginning and 63.5MB in the end (delta: 3.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-26 00:37:12,007 INFO L158 Benchmark]: Boogie Preprocessor took 34.45ms. Allocated memory is still 161.5MB. Free memory was 63.5MB in the beginning and 62.2MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:37:12,008 INFO L158 Benchmark]: RCFGBuilder took 586.94ms. Allocated memory is still 161.5MB. Free memory was 62.2MB in the beginning and 117.0MB in the end (delta: -54.8MB). Peak memory consumption was 7.1MB. Max. memory is 16.1GB. [2022-11-26 00:37:12,009 INFO L158 Benchmark]: TraceAbstraction took 426.03ms. Allocated memory is still 161.5MB. Free memory was 115.9MB in the beginning and 98.1MB in the end (delta: 17.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-11-26 00:37:12,009 INFO L158 Benchmark]: Witness Printer took 5.13ms. Allocated memory is still 161.5MB. Free memory is still 98.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:37:12,012 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 119.5MB. Free memory is still 87.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1322.99ms. Allocated memory is still 161.5MB. Free memory was 129.4MB in the beginning and 66.9MB in the end (delta: 62.5MB). Peak memory consumption was 62.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 59.63ms. Allocated memory is still 161.5MB. Free memory was 66.9MB in the beginning and 63.5MB in the end (delta: 3.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.45ms. Allocated memory is still 161.5MB. Free memory was 63.5MB in the beginning and 62.2MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 586.94ms. Allocated memory is still 161.5MB. Free memory was 62.2MB in the beginning and 117.0MB in the end (delta: -54.8MB). Peak memory consumption was 7.1MB. Max. memory is 16.1GB. * TraceAbstraction took 426.03ms. Allocated memory is still 161.5MB. Free memory was 115.9MB in the beginning and 98.1MB in the end (delta: 17.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Witness Printer took 5.13ms. Allocated memory is still 161.5MB. Free memory is still 98.1MB. There was no memory consumed. 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: 1581]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: overapproximation of atoi at line 1558. 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); [L1571] CALL printLine("Calling bad()...") VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1, line={4:0}] [L1414] COND TRUE line != ((void *)0) [L1571] RET printLine("Calling bad()...") VAL [\old(argc)=1073741825, argc=1073741825, argv={1073741827:1073741826}, argv={1073741827:1073741826}, GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1572] CALL CWE191_Integer_Underflow__int_fgets_multiply_66_bad() [L1551] int data; [L1552] int dataArray[5]; [L1553] data = 0 [L1555] char inputBuffer[(3 * sizeof(data) + 2)] = ""; [L1556] COND TRUE fgets(inputBuffer, (3 * sizeof(data) + 2), stdin) != ((void *)0) [L1558] data = atoi(inputBuffer) [L1555] char inputBuffer[(3 * sizeof(data) + 2)] = ""; [L1565] dataArray[2] = data [L1566] CALL CWE191_Integer_Underflow__int_fgets_multiply_66b_badSink(dataArray) [L1578] EXPR dataArray[2] [L1578] int data = dataArray[2]; [L1579] COND TRUE data < 0 VAL [data=-1073741825, dataArray={7:0}, dataArray={7:0}, GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1581] data * 2 VAL [data=-1073741825, dataArray={7:0}, dataArray={7:0}, 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: 1581]: 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, 17 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=17occurred 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, 9 NumberOfCodeBlocks, 9 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 [2022-11-26 00:37:12,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur/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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_multiply_66_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur/config/svcomp-Overflow-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash be3c297fe43a7bc8ea537df085d4f69535ba54c0205bfc09097f4c935400e3cd --- 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-38b53e6 [2022-11-26 00:37:14,565 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:37:14,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:37:14,587 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:37:14,587 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:37:14,588 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:37:14,590 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:37:14,592 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:37:14,594 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:37:14,595 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:37:14,596 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:37:14,598 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:37:14,598 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:37:14,599 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:37:14,601 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:37:14,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:37:14,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:37:14,604 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:37:14,606 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:37:14,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:37:14,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:37:14,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:37:14,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:37:14,614 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:37:14,617 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:37:14,618 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:37:14,618 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:37:14,619 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:37:14,620 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:37:14,621 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:37:14,622 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:37:14,623 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:37:14,624 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:37:14,625 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:37:14,637 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:37:14,637 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:37:14,639 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:37:14,640 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:37:14,640 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:37:14,641 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:37:14,642 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:37:14,643 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur/config/svcomp-Overflow-64bit-Taipan_Bitvector.epf [2022-11-26 00:37:14,675 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:37:14,675 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:37:14,676 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:37:14,676 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:37:14,677 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:37:14,677 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:37:14,678 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:37:14,678 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:37:14,678 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:37:14,678 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:37:14,679 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:37:14,679 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:37:14,680 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:37:14,680 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 00:37:14,680 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:37:14,681 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:37:14,681 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:37:14,681 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:37:14,681 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 00:37:14,682 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-26 00:37:14,682 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-26 00:37:14,682 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-26 00:37:14,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:37:14,683 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:37:14,683 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:37:14,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:37:14,684 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-26 00:37:14,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:37:14,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:37:14,685 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:37:14,685 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:37:14,685 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:37:14,686 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-26 00:37:14,686 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-26 00:37:14,686 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:37:14,686 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:37:14,687 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-26 00:37:14,687 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be3c297fe43a7bc8ea537df085d4f69535ba54c0205bfc09097f4c935400e3cd [2022-11-26 00:37:15,132 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:37:15,167 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:37:15,170 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:37:15,171 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:37:15,172 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:37:15,174 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_multiply_66_bad.i [2022-11-26 00:37:18,486 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:37:18,849 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:37:18,849 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_multiply_66_bad.i [2022-11-26 00:37:18,870 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur/data/1bce810d3/0b5a0a80ac944cc0a194cc52bc8a9081/FLAG2cf9e986c [2022-11-26 00:37:18,893 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur/data/1bce810d3/0b5a0a80ac944cc0a194cc52bc8a9081 [2022-11-26 00:37:18,899 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:37:18,900 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:37:18,905 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:37:18,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:37:18,909 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:37:18,910 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:37:18" (1/1) ... [2022-11-26 00:37:18,911 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3241944e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:18, skipping insertion in model container [2022-11-26 00:37:18,911 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:37:18" (1/1) ... [2022-11-26 00:37:18,918 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:37:18,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:37:19,332 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-26 00:37:19,861 WARN L623 FunctionHandler]: Unknown extern function puts [2022-11-26 00:37:19,866 WARN L623 FunctionHandler]: Unknown extern function __ctype_b_loc [2022-11-26 00:37:19,870 WARN L623 FunctionHandler]: Unknown extern function __ctype_b_loc [2022-11-26 00:37:19,872 WARN L623 FunctionHandler]: Unknown extern function iswxdigit [2022-11-26 00:37:19,873 WARN L623 FunctionHandler]: Unknown extern function iswxdigit [2022-11-26 00:37:19,904 WARN L623 FunctionHandler]: Unknown extern function fgets [2022-11-26 00:37:19,907 WARN L623 FunctionHandler]: Unknown extern function time [2022-11-26 00:37:19,913 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:37:19,933 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:37:19,967 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-26 00:37:20,049 WARN L623 FunctionHandler]: Unknown extern function puts [2022-11-26 00:37:20,060 WARN L623 FunctionHandler]: Unknown extern function __ctype_b_loc [2022-11-26 00:37:20,064 WARN L623 FunctionHandler]: Unknown extern function __ctype_b_loc [2022-11-26 00:37:20,069 WARN L623 FunctionHandler]: Unknown extern function iswxdigit [2022-11-26 00:37:20,072 WARN L623 FunctionHandler]: Unknown extern function iswxdigit [2022-11-26 00:37:20,077 WARN L623 FunctionHandler]: Unknown extern function fgets [2022-11-26 00:37:20,097 WARN L623 FunctionHandler]: Unknown extern function time [2022-11-26 00:37:20,099 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:37:20,292 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:37:20,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:20 WrapperNode [2022-11-26 00:37:20,294 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:37:20,295 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:37:20,295 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:37:20,296 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:37:20,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:20" (1/1) ... [2022-11-26 00:37:20,355 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:20" (1/1) ... [2022-11-26 00:37:20,385 INFO L138 Inliner]: procedures = 506, calls = 67, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 60 [2022-11-26 00:37:20,387 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:37:20,388 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:37:20,389 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:37:20,389 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:37:20,399 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:20" (1/1) ... [2022-11-26 00:37:20,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:20" (1/1) ... [2022-11-26 00:37:20,413 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:20" (1/1) ... [2022-11-26 00:37:20,415 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:20" (1/1) ... [2022-11-26 00:37:20,425 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:20" (1/1) ... [2022-11-26 00:37:20,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:20" (1/1) ... [2022-11-26 00:37:20,443 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:20" (1/1) ... [2022-11-26 00:37:20,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:20" (1/1) ... [2022-11-26 00:37:20,457 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:37:20,463 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:37:20,463 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:37:20,463 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:37:20,464 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:20" (1/1) ... [2022-11-26 00:37:20,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:37:20,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:37:20,501 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:37:20,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:37:20,555 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2022-11-26 00:37:20,556 INFO L130 BoogieDeclarations]: Found specification of procedure printLine [2022-11-26 00:37:20,556 INFO L138 BoogieDeclarations]: Found implementation of procedure printLine [2022-11-26 00:37:20,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:37:20,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-26 00:37:20,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:37:20,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:37:20,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:37:20,557 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-26 00:37:20,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:37:20,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-26 00:37:20,558 INFO L130 BoogieDeclarations]: Found specification of procedure time [2022-11-26 00:37:20,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2022-11-26 00:37:20,799 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:37:20,801 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:37:21,063 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:37:21,069 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:37:21,069 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-26 00:37:21,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:37:21 BoogieIcfgContainer [2022-11-26 00:37:21,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:37:21,073 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:37:21,074 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:37:21,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:37:21,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:37:18" (1/3) ... [2022-11-26 00:37:21,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76589022 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:37:21, skipping insertion in model container [2022-11-26 00:37:21,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:20" (2/3) ... [2022-11-26 00:37:21,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76589022 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:37:21, skipping insertion in model container [2022-11-26 00:37:21,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:37:21" (3/3) ... [2022-11-26 00:37:21,080 INFO L112 eAbstractionObserver]: Analyzing ICFG CWE191_Integer_Underflow__int_fgets_multiply_66_bad.i [2022-11-26 00:37:21,117 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:37:21,117 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-26 00:37:21,174 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:37:21,181 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=FINITE_AUTOMATA, 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;@1ce4859e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:37:21,181 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-26 00:37:21,186 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:37:21,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 00:37:21,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:37:21,197 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:37:21,198 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-26 00:37:21,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:37:21,205 INFO L85 PathProgramCache]: Analyzing trace with hash 252523526, now seen corresponding path program 1 times [2022-11-26 00:37:21,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:37:21,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1333648662] [2022-11-26 00:37:21,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:37:21,225 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 [2022-11-26 00:37:21,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:37:21,235 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur/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) [2022-11-26 00:37:21,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur/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 [2022-11-26 00:37:21,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 00:37:21,458 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-26 00:37:21,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 00:37:21,556 INFO L130 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2022-11-26 00:37:21,557 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-26 00:37:21,559 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 2 remaining) [2022-11-26 00:37:21,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 2 remaining) [2022-11-26 00:37:21,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur/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)] Ended with exit code 0 [2022-11-26 00:37:21,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur/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 [2022-11-26 00:37:21,766 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2022-11-26 00:37:21,770 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-26 00:37:21,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 12:37:21 BoogieIcfgContainer [2022-11-26 00:37:21,803 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-26 00:37:21,803 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-26 00:37:21,803 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-26 00:37:21,804 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-26 00:37:21,804 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:37:21" (3/4) ... [2022-11-26 00:37:21,808 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-26 00:37:21,808 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-26 00:37:21,811 INFO L158 Benchmark]: Toolchain (without parser) took 2908.62ms. Allocated memory was 65.0MB in the beginning and 92.3MB in the end (delta: 27.3MB). Free memory was 32.0MB in the beginning and 47.0MB in the end (delta: -15.0MB). Peak memory consumption was 12.3MB. Max. memory is 16.1GB. [2022-11-26 00:37:21,812 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 65.0MB. Free memory was 43.0MB in the beginning and 43.0MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:37:21,814 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1388.79ms. Allocated memory was 65.0MB in the beginning and 92.3MB in the end (delta: 27.3MB). Free memory was 31.8MB in the beginning and 58.8MB in the end (delta: -26.9MB). Peak memory consumption was 23.3MB. Max. memory is 16.1GB. [2022-11-26 00:37:21,821 INFO L158 Benchmark]: Boogie Procedure Inliner took 92.39ms. Allocated memory is still 92.3MB. Free memory was 58.8MB in the beginning and 55.6MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-26 00:37:21,822 INFO L158 Benchmark]: Boogie Preprocessor took 74.30ms. Allocated memory is still 92.3MB. Free memory was 55.6MB in the beginning and 53.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:37:21,823 INFO L158 Benchmark]: RCFGBuilder took 608.07ms. Allocated memory is still 92.3MB. Free memory was 53.5MB in the beginning and 38.8MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-26 00:37:21,824 INFO L158 Benchmark]: TraceAbstraction took 729.34ms. Allocated memory is still 92.3MB. Free memory was 37.8MB in the beginning and 47.0MB in the end (delta: -9.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:37:21,824 INFO L158 Benchmark]: Witness Printer took 4.70ms. Allocated memory is still 92.3MB. Free memory is still 47.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:37:21,828 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 65.0MB. Free memory was 43.0MB in the beginning and 43.0MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1388.79ms. Allocated memory was 65.0MB in the beginning and 92.3MB in the end (delta: 27.3MB). Free memory was 31.8MB in the beginning and 58.8MB in the end (delta: -26.9MB). Peak memory consumption was 23.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 92.39ms. Allocated memory is still 92.3MB. Free memory was 58.8MB in the beginning and 55.6MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 74.30ms. Allocated memory is still 92.3MB. Free memory was 55.6MB in the beginning and 53.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 608.07ms. Allocated memory is still 92.3MB. Free memory was 53.5MB in the beginning and 38.8MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 729.34ms. Allocated memory is still 92.3MB. Free memory was 37.8MB in the beginning and 47.0MB in the end (delta: -9.2MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 4.70ms. Allocated memory is still 92.3MB. Free memory is still 47.0MB. There was no memory consumed. 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: 1581]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: overapproximation of atoi at line 1558. 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] [L1571] CALL printLine("Calling bad()...") VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1, line={4:0}] [L1414] COND TRUE line != ((void *)0) [L1571] 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] [L1572] CALL CWE191_Integer_Underflow__int_fgets_multiply_66_bad() [L1551] int data; [L1552] int dataArray[5]; [L1553] data = 0 [L1555] char inputBuffer[(3 * sizeof(data) + 2)] = ""; [L1556] COND TRUE fgets(inputBuffer, (3 * sizeof(data) + 2), stdin) != ((void *)0) [L1558] data = atoi(inputBuffer) [L1555] char inputBuffer[(3 * sizeof(data) + 2)] = ""; [L1565] dataArray[2] = data [L1566] CALL CWE191_Integer_Underflow__int_fgets_multiply_66b_badSink(dataArray) [L1578] EXPR dataArray[2] [L1578] int data = dataArray[2]; [L1579] COND TRUE data < 0 VAL [data=-2147483648, dataArray={32775:0}, dataArray={32775:0}, GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1581] data * 2 VAL [data=-2147483648, dataArray={32775:0}, dataArray={32775:0}, 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: 1581]: 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, 24 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, 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=24occurred 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, 12 NumberOfCodeBlocks, 12 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 [2022-11-26 00:37:21,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d455973e-a7c2-403a-a296-e353b6e39736/bin/utaipan-ByfvJB40ur/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 Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample