./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_predec_16_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_17d39b1c-3953-4a16-8308-9dfe07b8641a/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/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_17d39b1c-3953-4a16-8308-9dfe07b8641a/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_predec_16_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/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_17d39b1c-3953-4a16-8308-9dfe07b8641a/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 19f771f105ae7d9054a8f880602bab6c07dc6a2f5208d8e293e172fe35f168aa --- 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 [2022-11-25 23:58:59,069 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:58:59,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:58:59,109 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:58:59,109 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:58:59,110 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:58:59,112 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:58:59,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:58:59,121 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:58:59,127 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:58:59,129 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:58:59,131 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:58:59,132 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:58:59,134 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:58:59,137 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:58:59,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:58:59,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:58:59,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:58:59,146 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:58:59,151 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:58:59,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:58:59,155 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:58:59,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:58:59,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:58:59,168 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:58:59,168 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:58:59,168 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:58:59,169 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:58:59,170 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:58:59,171 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:58:59,171 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:58:59,172 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:58:59,173 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:58:59,174 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:58:59,175 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:58:59,175 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:58:59,176 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:58:59,179 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:58:59,180 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:58:59,182 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:58:59,183 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:58:59,184 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/bin/utaipan-ByfvJB40ur/config/svcomp-Overflow-64bit-Taipan_Default.epf [2022-11-25 23:58:59,204 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:58:59,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:58:59,205 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:58:59,205 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:58:59,206 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:58:59,206 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:58:59,206 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:58:59,207 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:58:59,207 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:58:59,207 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:58:59,207 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:58:59,208 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:58:59,208 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:58:59,208 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:58:59,208 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:58:59,209 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:58:59,209 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:58:59,209 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:58:59,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:58:59,210 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 23:58:59,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:58:59,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:58:59,211 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:58:59,211 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:58:59,211 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:58:59,212 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-25 23:58:59,212 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:58:59,212 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:58:59,212 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:58:59,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:58:59,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:58:59,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:58:59,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:58:59,214 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:58:59,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:58:59,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:58:59,215 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:58:59,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:58:59,215 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:58:59,215 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:58:59,216 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_17d39b1c-3953-4a16-8308-9dfe07b8641a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 19f771f105ae7d9054a8f880602bab6c07dc6a2f5208d8e293e172fe35f168aa [2022-11-25 23:58:59,548 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:58:59,572 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:58:59,575 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:58:59,576 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:58:59,577 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:58:59,578 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_predec_16_bad.i [2022-11-25 23:59:02,587 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:59:03,017 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:59:03,018 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_predec_16_bad.i [2022-11-25 23:59:03,052 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/bin/utaipan-ByfvJB40ur/data/f919bab39/c94e9456cc5b496ea3d6a39bfd4ae0db/FLAG708f129bb [2022-11-25 23:59:03,067 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/bin/utaipan-ByfvJB40ur/data/f919bab39/c94e9456cc5b496ea3d6a39bfd4ae0db [2022-11-25 23:59:03,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:59:03,072 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:59:03,073 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:59:03,073 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:59:03,077 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:59:03,078 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:59:03" (1/1) ... [2022-11-25 23:59:03,079 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7301c316 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:59:03, skipping insertion in model container [2022-11-25 23:59:03,080 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:59:03" (1/1) ... [2022-11-25 23:59:03,104 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:59:03,210 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:59:03,549 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-25 23:59:04,029 WARN L623 FunctionHandler]: Unknown extern function puts [2022-11-25 23:59:04,035 WARN L623 FunctionHandler]: Unknown extern function __ctype_b_loc [2022-11-25 23:59:04,043 WARN L623 FunctionHandler]: Unknown extern function __ctype_b_loc [2022-11-25 23:59:04,056 WARN L623 FunctionHandler]: Unknown extern function iswxdigit [2022-11-25 23:59:04,057 WARN L623 FunctionHandler]: Unknown extern function iswxdigit [2022-11-25 23:59:04,076 WARN L623 FunctionHandler]: Unknown extern function fgets [2022-11-25 23:59:04,084 WARN L623 FunctionHandler]: Unknown extern function time [2022-11-25 23:59:04,085 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:59:04,096 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:59:04,134 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-25 23:59:04,218 WARN L623 FunctionHandler]: Unknown extern function puts [2022-11-25 23:59:04,222 WARN L623 FunctionHandler]: Unknown extern function __ctype_b_loc [2022-11-25 23:59:04,224 WARN L623 FunctionHandler]: Unknown extern function __ctype_b_loc [2022-11-25 23:59:04,236 WARN L623 FunctionHandler]: Unknown extern function iswxdigit [2022-11-25 23:59:04,237 WARN L623 FunctionHandler]: Unknown extern function iswxdigit [2022-11-25 23:59:04,245 WARN L623 FunctionHandler]: Unknown extern function fgets [2022-11-25 23:59:04,247 WARN L623 FunctionHandler]: Unknown extern function time [2022-11-25 23:59:04,248 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:59:04,399 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:59:04,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:59:04 WrapperNode [2022-11-25 23:59:04,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:59:04,403 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:59:04,403 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:59:04,404 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:59:04,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:59:04" (1/1) ... [2022-11-25 23:59:04,466 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:59:04" (1/1) ... [2022-11-25 23:59:04,501 INFO L138 Inliner]: procedures = 500, calls = 62, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 64 [2022-11-25 23:59:04,505 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:59:04,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:59:04,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:59:04,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:59:04,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:59:04" (1/1) ... [2022-11-25 23:59:04,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:59:04" (1/1) ... [2022-11-25 23:59:04,530 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:59:04" (1/1) ... [2022-11-25 23:59:04,535 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:59:04" (1/1) ... [2022-11-25 23:59:04,540 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:59:04" (1/1) ... [2022-11-25 23:59:04,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:59:04" (1/1) ... [2022-11-25 23:59:04,555 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:59:04" (1/1) ... [2022-11-25 23:59:04,564 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:59:04" (1/1) ... [2022-11-25 23:59:04,567 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:59:04,568 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:59:04,568 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:59:04,568 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:59:04,569 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:59:04" (1/1) ... [2022-11-25 23:59:04,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:59:04,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:59:04,603 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:59:04,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:59:04,664 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2022-11-25 23:59:04,664 INFO L130 BoogieDeclarations]: Found specification of procedure printLine [2022-11-25 23:59:04,664 INFO L138 BoogieDeclarations]: Found implementation of procedure printLine [2022-11-25 23:59:04,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 23:59:04,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-25 23:59:04,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:59:04,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:59:04,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:59:04,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 23:59:04,665 INFO L130 BoogieDeclarations]: Found specification of procedure time [2022-11-25 23:59:04,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:59:04,853 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:59:04,856 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:59:05,014 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:59:05,082 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:59:05,083 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 23:59:05,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:59:05 BoogieIcfgContainer [2022-11-25 23:59:05,086 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:59:05,087 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:59:05,088 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:59:05,091 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:59:05,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:59:03" (1/3) ... [2022-11-25 23:59:05,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1170f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:59:05, skipping insertion in model container [2022-11-25 23:59:05,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:59:04" (2/3) ... [2022-11-25 23:59:05,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1170f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:59:05, skipping insertion in model container [2022-11-25 23:59:05,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:59:05" (3/3) ... [2022-11-25 23:59:05,096 INFO L112 eAbstractionObserver]: Analyzing ICFG CWE191_Integer_Underflow__int_fgets_predec_16_bad.i [2022-11-25 23:59:05,116 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:59:05,116 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-25 23:59:05,179 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:59:05,187 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;@342d1660, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:59:05,188 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-25 23:59:05,192 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 14 states have internal predecessors, (16), 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) [2022-11-25 23:59:05,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 23:59:05,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:59:05,206 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:59:05,207 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-25 23:59:05,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:59:05,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1776296088, now seen corresponding path program 1 times [2022-11-25 23:59:05,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:59:05,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24455858] [2022-11-25 23:59:05,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:59:05,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:59:05,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:59:05,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:59:05,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:59:05,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24455858] [2022-11-25 23:59:05,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24455858] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:59:05,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:59:05,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:59:05,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687271411] [2022-11-25 23:59:05,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:59:05,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 23:59:05,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:59:05,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 23:59:05,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 23:59:05,477 INFO L87 Difference]: Start difference. First operand has 18 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 14 states have internal predecessors, (16), 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 23:59:05,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:59:05,535 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-11-25 23:59:05,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 23:59:05,538 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2022-11-25 23:59:05,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:59:05,544 INFO L225 Difference]: With dead ends: 29 [2022-11-25 23:59:05,544 INFO L226 Difference]: Without dead ends: 14 [2022-11-25 23:59:05,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 23:59:05,550 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:59:05,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:59:05,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-25 23:59:05,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-25 23:59:05,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 11 states have internal predecessors, (11), 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) [2022-11-25 23:59:05,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-11-25 23:59:05,587 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 8 [2022-11-25 23:59:05,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:59:05,588 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-11-25 23:59:05,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 23:59:05,589 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-11-25 23:59:05,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 23:59:05,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:59:05,590 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:59:05,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:59:05,591 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-25 23:59:05,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:59:05,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1963339971, now seen corresponding path program 1 times [2022-11-25 23:59:05,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:59:05,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148843368] [2022-11-25 23:59:05,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:59:05,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:59:05,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 23:59:05,659 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 23:59:05,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 23:59:05,738 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-25 23:59:05,739 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 23:59:05,741 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 2 remaining) [2022-11-25 23:59:05,743 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 2 remaining) [2022-11-25 23:59:05,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 23:59:05,747 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-25 23:59:05,750 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 23:59:05,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 11:59:05 BoogieIcfgContainer [2022-11-25 23:59:05,794 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 23:59:05,795 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 23:59:05,796 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 23:59:05,797 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 23:59:05,797 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:59:05" (3/4) ... [2022-11-25 23:59:05,801 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-25 23:59:05,808 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 23:59:05,809 INFO L158 Benchmark]: Toolchain (without parser) took 2736.81ms. Allocated memory is still 161.5MB. Free memory was 131.3MB in the beginning and 89.2MB in the end (delta: 42.1MB). Peak memory consumption was 42.0MB. Max. memory is 16.1GB. [2022-11-25 23:59:05,809 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 125.8MB. Free memory was 93.5MB in the beginning and 93.3MB in the end (delta: 160.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 23:59:05,811 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1329.14ms. Allocated memory is still 161.5MB. Free memory was 131.3MB in the beginning and 71.3MB in the end (delta: 60.0MB). Peak memory consumption was 58.7MB. Max. memory is 16.1GB. [2022-11-25 23:59:05,813 INFO L158 Benchmark]: Boogie Procedure Inliner took 102.50ms. Allocated memory is still 161.5MB. Free memory was 71.3MB in the beginning and 68.4MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-25 23:59:05,813 INFO L158 Benchmark]: Boogie Preprocessor took 60.68ms. Allocated memory is still 161.5MB. Free memory was 68.4MB in the beginning and 67.1MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 23:59:05,815 INFO L158 Benchmark]: RCFGBuilder took 518.11ms. Allocated memory is still 161.5MB. Free memory was 67.1MB in the beginning and 118.6MB in the end (delta: -51.5MB). Peak memory consumption was 8.3MB. Max. memory is 16.1GB. [2022-11-25 23:59:05,818 INFO L158 Benchmark]: TraceAbstraction took 707.36ms. Allocated memory is still 161.5MB. Free memory was 118.6MB in the beginning and 89.2MB in the end (delta: 29.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2022-11-25 23:59:05,818 INFO L158 Benchmark]: Witness Printer took 12.54ms. Allocated memory is still 161.5MB. Free memory is still 89.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 23:59:05,821 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 125.8MB. Free memory was 93.5MB in the beginning and 93.3MB in the end (delta: 160.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1329.14ms. Allocated memory is still 161.5MB. Free memory was 131.3MB in the beginning and 71.3MB in the end (delta: 60.0MB). Peak memory consumption was 58.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 102.50ms. Allocated memory is still 161.5MB. Free memory was 71.3MB in the beginning and 68.4MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 60.68ms. Allocated memory is still 161.5MB. Free memory was 68.4MB in the beginning and 67.1MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 518.11ms. Allocated memory is still 161.5MB. Free memory was 67.1MB in the beginning and 118.6MB in the end (delta: -51.5MB). Peak memory consumption was 8.3MB. Max. memory is 16.1GB. * TraceAbstraction took 707.36ms. Allocated memory is still 161.5MB. Free memory was 118.6MB in the beginning and 89.2MB in the end (delta: 29.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Witness Printer took 12.54ms. Allocated memory is still 161.5MB. Free memory is still 89.2MB. 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: 1570]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: overapproximation of atoi at line 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); [L1580] 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) [L1580] RET printLine("Calling bad()...") VAL [\old(argc)=1073741826, argc=1073741826, argv={1073741829:1073741827}, argv={1073741829:1073741827}, GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1581] CALL CWE191_Integer_Underflow__int_fgets_predec_16_bad() [L1550] int data; [L1551] data = 0 VAL [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] [L1552] COND TRUE 1 [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)] = ""; VAL [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] [L1567] COND TRUE 1 VAL [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] [L1570] --data VAL [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: 1570]: 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, 18 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 16 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4 IncrementalHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 16 mSDtfsCounter, 4 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 7 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 [2022-11-25 23:59:05,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/bin/utaipan-ByfvJB40ur/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 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_17d39b1c-3953-4a16-8308-9dfe07b8641a/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/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_17d39b1c-3953-4a16-8308-9dfe07b8641a/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_predec_16_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/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_17d39b1c-3953-4a16-8308-9dfe07b8641a/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 19f771f105ae7d9054a8f880602bab6c07dc6a2f5208d8e293e172fe35f168aa --- 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 [2022-11-25 23:59:08,338 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:59:08,340 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:59:08,378 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:59:08,379 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:59:08,383 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:59:08,386 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:59:08,388 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:59:08,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:59:08,392 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:59:08,393 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:59:08,396 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:59:08,397 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:59:08,402 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:59:08,403 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:59:08,407 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:59:08,411 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:59:08,412 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:59:08,414 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:59:08,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:59:08,421 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:59:08,422 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:59:08,425 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:59:08,426 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:59:08,433 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:59:08,437 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:59:08,437 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:59:08,438 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:59:08,442 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:59:08,443 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:59:08,443 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:59:08,444 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:59:08,445 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:59:08,447 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:59:08,455 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:59:08,455 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:59:08,456 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:59:08,457 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:59:08,457 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:59:08,458 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:59:08,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:59:08,462 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/bin/utaipan-ByfvJB40ur/config/svcomp-Overflow-64bit-Taipan_Bitvector.epf [2022-11-25 23:59:08,497 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:59:08,498 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:59:08,499 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:59:08,499 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:59:08,500 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:59:08,501 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:59:08,501 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:59:08,501 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:59:08,502 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:59:08,502 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:59:08,503 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:59:08,503 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:59:08,504 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:59:08,504 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 23:59:08,505 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:59:08,505 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:59:08,505 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:59:08,505 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:59:08,505 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 23:59:08,506 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 23:59:08,506 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-25 23:59:08,506 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 23:59:08,506 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:59:08,507 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:59:08,507 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:59:08,507 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:59:08,507 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 23:59:08,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:59:08,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:59:08,508 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:59:08,508 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:59:08,509 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:59:08,509 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-25 23:59:08,509 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 23:59:08,510 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:59:08,510 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:59:08,510 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 23:59:08,510 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_17d39b1c-3953-4a16-8308-9dfe07b8641a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 19f771f105ae7d9054a8f880602bab6c07dc6a2f5208d8e293e172fe35f168aa [2022-11-25 23:59:08,921 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:59:08,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:59:08,957 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:59:08,958 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:59:08,958 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:59:08,960 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_predec_16_bad.i [2022-11-25 23:59:11,957 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:59:12,352 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:59:12,356 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_predec_16_bad.i [2022-11-25 23:59:12,396 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/bin/utaipan-ByfvJB40ur/data/37e7a634e/50e365a962164ef8be6bbfcc619f0814/FLAGd2204e35d [2022-11-25 23:59:12,410 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/bin/utaipan-ByfvJB40ur/data/37e7a634e/50e365a962164ef8be6bbfcc619f0814 [2022-11-25 23:59:12,412 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:59:12,414 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:59:12,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:59:12,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:59:12,419 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:59:12,420 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:59:12" (1/1) ... [2022-11-25 23:59:12,421 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2de1c3e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:59:12, skipping insertion in model container [2022-11-25 23:59:12,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:59:12" (1/1) ... [2022-11-25 23:59:12,428 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:59:12,497 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:59:13,029 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-25 23:59:13,748 WARN L623 FunctionHandler]: Unknown extern function puts [2022-11-25 23:59:13,754 WARN L623 FunctionHandler]: Unknown extern function __ctype_b_loc [2022-11-25 23:59:13,755 WARN L623 FunctionHandler]: Unknown extern function __ctype_b_loc [2022-11-25 23:59:13,762 WARN L623 FunctionHandler]: Unknown extern function iswxdigit [2022-11-25 23:59:13,763 WARN L623 FunctionHandler]: Unknown extern function iswxdigit [2022-11-25 23:59:13,792 WARN L623 FunctionHandler]: Unknown extern function fgets [2022-11-25 23:59:13,800 WARN L623 FunctionHandler]: Unknown extern function time [2022-11-25 23:59:13,801 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:59:13,843 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:59:13,875 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-25 23:59:13,948 WARN L623 FunctionHandler]: Unknown extern function puts [2022-11-25 23:59:13,952 WARN L623 FunctionHandler]: Unknown extern function __ctype_b_loc [2022-11-25 23:59:13,954 WARN L623 FunctionHandler]: Unknown extern function __ctype_b_loc [2022-11-25 23:59:13,956 WARN L623 FunctionHandler]: Unknown extern function iswxdigit [2022-11-25 23:59:13,957 WARN L623 FunctionHandler]: Unknown extern function iswxdigit [2022-11-25 23:59:13,961 WARN L623 FunctionHandler]: Unknown extern function fgets [2022-11-25 23:59:13,963 WARN L623 FunctionHandler]: Unknown extern function time [2022-11-25 23:59:13,964 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:59:14,115 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:59:14,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:59:14 WrapperNode [2022-11-25 23:59:14,117 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:59:14,118 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:59:14,119 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:59:14,120 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:59:14,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:59:14" (1/1) ... [2022-11-25 23:59:14,176 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:59:14" (1/1) ... [2022-11-25 23:59:14,212 INFO L138 Inliner]: procedures = 505, calls = 62, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2022-11-25 23:59:14,212 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:59:14,219 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:59:14,219 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:59:14,219 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:59:14,228 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:59:14" (1/1) ... [2022-11-25 23:59:14,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:59:14" (1/1) ... [2022-11-25 23:59:14,231 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:59:14" (1/1) ... [2022-11-25 23:59:14,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:59:14" (1/1) ... [2022-11-25 23:59:14,240 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:59:14" (1/1) ... [2022-11-25 23:59:14,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:59:14" (1/1) ... [2022-11-25 23:59:14,246 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:59:14" (1/1) ... [2022-11-25 23:59:14,248 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:59:14" (1/1) ... [2022-11-25 23:59:14,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:59:14,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:59:14,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:59:14,253 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:59:14,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:59:14" (1/1) ... [2022-11-25 23:59:14,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:59:14,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:59:14,289 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:59:14,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:59:14,332 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2022-11-25 23:59:14,333 INFO L130 BoogieDeclarations]: Found specification of procedure printLine [2022-11-25 23:59:14,333 INFO L138 BoogieDeclarations]: Found implementation of procedure printLine [2022-11-25 23:59:14,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 23:59:14,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 23:59:14,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:59:14,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:59:14,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:59:14,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 23:59:14,334 INFO L130 BoogieDeclarations]: Found specification of procedure time [2022-11-25 23:59:14,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2022-11-25 23:59:14,603 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:59:14,611 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:59:14,781 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:59:14,791 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:59:14,792 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 23:59:14,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:59:14 BoogieIcfgContainer [2022-11-25 23:59:14,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:59:14,799 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:59:14,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:59:14,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:59:14,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:59:12" (1/3) ... [2022-11-25 23:59:14,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df0edaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:59:14, skipping insertion in model container [2022-11-25 23:59:14,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:59:14" (2/3) ... [2022-11-25 23:59:14,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df0edaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:59:14, skipping insertion in model container [2022-11-25 23:59:14,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:59:14" (3/3) ... [2022-11-25 23:59:14,808 INFO L112 eAbstractionObserver]: Analyzing ICFG CWE191_Integer_Underflow__int_fgets_predec_16_bad.i [2022-11-25 23:59:14,827 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:59:14,828 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-25 23:59:14,885 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:59:14,892 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;@6034a419, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:59:14,892 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-25 23:59:14,896 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 20 states have internal predecessors, (25), 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) [2022-11-25 23:59:14,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 23:59:14,907 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:59:14,908 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:59:14,909 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-25 23:59:14,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:59:14,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1450936690, now seen corresponding path program 1 times [2022-11-25 23:59:14,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:59:14,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1790039605] [2022-11-25 23:59:14,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:59:14,949 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 [2022-11-25 23:59:14,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:59:14,959 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/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) [2022-11-25 23:59:14,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/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 [2022-11-25 23:59:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:59:15,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-25 23:59:15,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:59:15,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:59:15,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:59:15,164 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:59:15,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1790039605] [2022-11-25 23:59:15,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1790039605] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:59:15,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:59:15,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:59:15,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923591972] [2022-11-25 23:59:15,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:59:15,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 23:59:15,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:59:15,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 23:59:15,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 23:59:15,222 INFO L87 Difference]: Start difference. First operand has 24 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 20 states have internal predecessors, (25), 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) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 23:59:15,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:59:15,247 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2022-11-25 23:59:15,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 23:59:15,250 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-25 23:59:15,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:59:15,258 INFO L225 Difference]: With dead ends: 39 [2022-11-25 23:59:15,259 INFO L226 Difference]: Without dead ends: 15 [2022-11-25 23:59:15,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 23:59:15,265 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:59:15,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:59:15,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-25 23:59:15,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-25 23:59:15,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 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) [2022-11-25 23:59:15,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-11-25 23:59:15,307 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2022-11-25 23:59:15,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:59:15,309 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-11-25 23:59:15,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 23:59:15,310 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-11-25 23:59:15,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 23:59:15,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:59:15,312 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:59:15,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/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)] Forceful destruction successful, exit code 0 [2022-11-25 23:59:15,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/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 [2022-11-25 23:59:15,530 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-25 23:59:15,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:59:15,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1512851975, now seen corresponding path program 1 times [2022-11-25 23:59:15,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:59:15,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830918969] [2022-11-25 23:59:15,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:59:15,532 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 [2022-11-25 23:59:15,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:59:15,556 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/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) [2022-11-25 23:59:15,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/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 (3)] Waiting until timeout for monitored process [2022-11-25 23:59:15,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 23:59:15,701 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 23:59:15,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 23:59:15,766 INFO L130 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2022-11-25 23:59:15,766 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 23:59:15,768 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 2 remaining) [2022-11-25 23:59:15,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 2 remaining) [2022-11-25 23:59:15,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/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 (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:59:15,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/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 [2022-11-25 23:59:15,975 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-25 23:59:15,978 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 23:59:16,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 11:59:16 BoogieIcfgContainer [2022-11-25 23:59:16,012 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 23:59:16,013 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 23:59:16,014 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 23:59:16,015 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 23:59:16,015 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:59:14" (3/4) ... [2022-11-25 23:59:16,019 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-25 23:59:16,019 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 23:59:16,021 INFO L158 Benchmark]: Toolchain (without parser) took 3605.61ms. Allocated memory is still 81.8MB. Free memory was 61.8MB in the beginning and 30.7MB in the end (delta: 31.2MB). Peak memory consumption was 30.8MB. Max. memory is 16.1GB. [2022-11-25 23:59:16,024 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 60.8MB. Free memory is still 39.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 23:59:16,025 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1701.93ms. Allocated memory is still 81.8MB. Free memory was 61.6MB in the beginning and 36.9MB in the end (delta: 24.6MB). Peak memory consumption was 31.1MB. Max. memory is 16.1GB. [2022-11-25 23:59:16,028 INFO L158 Benchmark]: Boogie Procedure Inliner took 100.13ms. Allocated memory is still 81.8MB. Free memory was 36.6MB in the beginning and 56.3MB in the end (delta: -19.7MB). Peak memory consumption was 6.6MB. Max. memory is 16.1GB. [2022-11-25 23:59:16,028 INFO L158 Benchmark]: Boogie Preprocessor took 32.56ms. Allocated memory is still 81.8MB. Free memory was 56.3MB in the beginning and 54.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 23:59:16,029 INFO L158 Benchmark]: RCFGBuilder took 542.40ms. Allocated memory is still 81.8MB. Free memory was 54.2MB in the beginning and 40.4MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-25 23:59:16,030 INFO L158 Benchmark]: TraceAbstraction took 1213.29ms. Allocated memory is still 81.8MB. Free memory was 39.5MB in the beginning and 31.1MB in the end (delta: 8.4MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. [2022-11-25 23:59:16,030 INFO L158 Benchmark]: Witness Printer took 5.92ms. Allocated memory is still 81.8MB. Free memory is still 30.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 23:59:16,032 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 60.8MB. Free memory is still 39.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1701.93ms. Allocated memory is still 81.8MB. Free memory was 61.6MB in the beginning and 36.9MB in the end (delta: 24.6MB). Peak memory consumption was 31.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 100.13ms. Allocated memory is still 81.8MB. Free memory was 36.6MB in the beginning and 56.3MB in the end (delta: -19.7MB). Peak memory consumption was 6.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.56ms. Allocated memory is still 81.8MB. Free memory was 56.3MB in the beginning and 54.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 542.40ms. Allocated memory is still 81.8MB. Free memory was 54.2MB in the beginning and 40.4MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 1213.29ms. Allocated memory is still 81.8MB. Free memory was 39.5MB in the beginning and 31.1MB in the end (delta: 8.4MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. * Witness Printer took 5.92ms. Allocated memory is still 81.8MB. Free memory is still 30.7MB. 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: 1570]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: overapproximation of atoi at line 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] [L1580] 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) [L1580] 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] [L1581] CALL CWE191_Integer_Underflow__int_fgets_predec_16_bad() [L1550] int data; [L1551] data = 0 VAL [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] [L1552] COND TRUE 1 [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)] = ""; VAL [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] [L1567] COND TRUE 1 VAL [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] [L1570] --data VAL [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: 1570]: 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: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 26 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 0 IncrementalHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 26 mSDtfsCounter, 0 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 10 SizeOfPredicates, 0 NumberOfNonLiveVariables, 47 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 [2022-11-25 23:59:16,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d39b1c-3953-4a16-8308-9dfe07b8641a/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