./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_sub_61_bad.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 2329fc70 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_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_sub_61_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 1280eedf37cdcd0a55d50ddad68050c61c16bd95d7a2c9d9060d4388e6bafc10 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 13:20:33,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:20:33,150 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:20:33,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:20:33,162 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:20:33,163 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:20:33,164 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:20:33,165 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:20:33,166 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:20:33,166 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:20:33,167 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:20:33,168 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:20:33,168 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:20:33,169 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:20:33,169 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:20:33,170 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:20:33,171 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:20:33,171 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:20:33,172 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:20:33,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:20:33,174 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:20:33,175 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:20:33,176 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:20:33,177 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:20:33,179 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:20:33,179 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:20:33,179 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:20:33,180 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:20:33,180 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:20:33,181 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:20:33,181 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:20:33,181 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:20:33,182 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:20:33,182 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:20:33,183 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:20:33,183 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:20:33,184 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:20:33,184 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:20:33,184 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:20:33,185 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:20:33,185 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:20:33,186 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-64bit-Automizer_Default.epf [2022-12-13 13:20:33,200 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:20:33,200 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:20:33,200 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:20:33,200 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:20:33,201 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:20:33,201 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:20:33,201 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:20:33,201 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:20:33,201 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:20:33,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:20:33,202 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 13:20:33,202 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:20:33,202 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:20:33,202 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 13:20:33,202 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:20:33,202 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 13:20:33,203 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-12-13 13:20:33,203 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 13:20:33,203 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:20:33,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 13:20:33,203 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:20:33,203 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:20:33,203 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:20:33,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:20:33,204 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:20:33,204 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:20:33,204 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 13:20:33,204 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 13:20:33,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 13:20:33,204 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:20:33,204 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 13:20:33,205 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:20:33,205 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:20:33,205 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:20:33,205 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1280eedf37cdcd0a55d50ddad68050c61c16bd95d7a2c9d9060d4388e6bafc10 [2022-12-13 13:20:33,387 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:20:33,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:20:33,406 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:20:33,407 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:20:33,408 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:20:33,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_sub_61_bad.i [2022-12-13 13:20:36,033 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:20:36,286 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:20:36,286 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_sub_61_bad.i [2022-12-13 13:20:36,304 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8/data/6ddf84b5e/93698b57198942f09c1262834c73867f/FLAG7603c9bac [2022-12-13 13:20:36,317 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8/data/6ddf84b5e/93698b57198942f09c1262834c73867f [2022-12-13 13:20:36,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:20:36,320 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:20:36,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:20:36,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:20:36,323 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:20:36,324 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:20:36" (1/1) ... [2022-12-13 13:20:36,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1815ea86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:20:36, skipping insertion in model container [2022-12-13 13:20:36,325 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:20:36" (1/1) ... [2022-12-13 13:20:36,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:20:36,371 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:20:36,673 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-13 13:20:37,001 WARN L623 FunctionHandler]: Unknown extern function puts [2022-12-13 13:20:37,005 WARN L623 FunctionHandler]: Unknown extern function __ctype_b_loc [2022-12-13 13:20:37,007 WARN L623 FunctionHandler]: Unknown extern function __ctype_b_loc [2022-12-13 13:20:37,009 WARN L623 FunctionHandler]: Unknown extern function iswxdigit [2022-12-13 13:20:37,009 WARN L623 FunctionHandler]: Unknown extern function iswxdigit [2022-12-13 13:20:37,030 WARN L623 FunctionHandler]: Unknown extern function time [2022-12-13 13:20:37,032 WARN L623 FunctionHandler]: Unknown extern function fgets [2022-12-13 13:20:37,033 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:20:37,042 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 13:20:37,058 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-13 13:20:37,119 WARN L623 FunctionHandler]: Unknown extern function puts [2022-12-13 13:20:37,121 WARN L623 FunctionHandler]: Unknown extern function __ctype_b_loc [2022-12-13 13:20:37,122 WARN L623 FunctionHandler]: Unknown extern function __ctype_b_loc [2022-12-13 13:20:37,124 WARN L623 FunctionHandler]: Unknown extern function iswxdigit [2022-12-13 13:20:37,125 WARN L623 FunctionHandler]: Unknown extern function iswxdigit [2022-12-13 13:20:37,130 WARN L623 FunctionHandler]: Unknown extern function time [2022-12-13 13:20:37,132 WARN L623 FunctionHandler]: Unknown extern function fgets [2022-12-13 13:20:37,133 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:20:37,214 INFO L208 MainTranslator]: Completed translation [2022-12-13 13:20:37,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:20:37 WrapperNode [2022-12-13 13:20:37,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:20:37,215 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 13:20:37,215 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 13:20:37,215 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 13:20:37,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:20:37" (1/1) ... [2022-12-13 13:20:37,235 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:20:37" (1/1) ... [2022-12-13 13:20:37,250 INFO L138 Inliner]: procedures = 501, calls = 63, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 58 [2022-12-13 13:20:37,250 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 13:20:37,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 13:20:37,251 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 13:20:37,251 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 13:20:37,258 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:20:37" (1/1) ... [2022-12-13 13:20:37,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:20:37" (1/1) ... [2022-12-13 13:20:37,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:20:37" (1/1) ... [2022-12-13 13:20:37,260 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:20:37" (1/1) ... [2022-12-13 13:20:37,265 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:20:37" (1/1) ... [2022-12-13 13:20:37,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:20:37" (1/1) ... [2022-12-13 13:20:37,267 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:20:37" (1/1) ... [2022-12-13 13:20:37,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:20:37" (1/1) ... [2022-12-13 13:20:37,270 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 13:20:37,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 13:20:37,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 13:20:37,270 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 13:20:37,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:20:37" (1/1) ... [2022-12-13 13:20:37,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:20:37,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:20:37,301 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 13:20:37,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 13:20:37,337 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2022-12-13 13:20:37,338 INFO L130 BoogieDeclarations]: Found specification of procedure printLine [2022-12-13 13:20:37,338 INFO L138 BoogieDeclarations]: Found implementation of procedure printLine [2022-12-13 13:20:37,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 13:20:37,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-12-13 13:20:37,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 13:20:37,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 13:20:37,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 13:20:37,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 13:20:37,339 INFO L130 BoogieDeclarations]: Found specification of procedure time [2022-12-13 13:20:37,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 13:20:37,448 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 13:20:37,450 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 13:20:37,548 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 13:20:37,552 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 13:20:37,552 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-13 13:20:37,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:20:37 BoogieIcfgContainer [2022-12-13 13:20:37,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 13:20:37,555 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 13:20:37,555 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 13:20:37,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 13:20:37,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 01:20:36" (1/3) ... [2022-12-13 13:20:37,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6211af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:20:37, skipping insertion in model container [2022-12-13 13:20:37,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:20:37" (2/3) ... [2022-12-13 13:20:37,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6211af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:20:37, skipping insertion in model container [2022-12-13 13:20:37,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:20:37" (3/3) ... [2022-12-13 13:20:37,560 INFO L112 eAbstractionObserver]: Analyzing ICFG CWE191_Integer_Underflow__int_fgets_sub_61_bad.i [2022-12-13 13:20:37,573 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 13:20:37,573 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-13 13:20:37,608 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:20:37,613 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5f53f303, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:20:37,613 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 13:20:37,616 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 16 states have (on average 1.25) internal successors, (20), 19 states have internal predecessors, (20), 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) [2022-12-13 13:20:37,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-13 13:20:37,622 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:20:37,622 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:20:37,623 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-12-13 13:20:37,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:20:37,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1091945264, now seen corresponding path program 1 times [2022-12-13 13:20:37,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:20:37,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504853580] [2022-12-13 13:20:37,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:20:37,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:20:37,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:20:37,729 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 13:20:37,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:20:37,762 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 13:20:37,763 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 13:20:37,764 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 2 remaining) [2022-12-13 13:20:37,765 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 2 remaining) [2022-12-13 13:20:37,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 13:20:37,768 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2022-12-13 13:20:37,772 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 13:20:37,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 01:20:37 BoogieIcfgContainer [2022-12-13 13:20:37,788 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 13:20:37,788 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 13:20:37,788 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 13:20:37,788 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 13:20:37,789 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:20:37" (3/4) ... [2022-12-13 13:20:37,791 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-12-13 13:20:37,791 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 13:20:37,792 INFO L158 Benchmark]: Toolchain (without parser) took 1471.95ms. Allocated memory was 107.0MB in the beginning and 134.2MB in the end (delta: 27.3MB). Free memory was 65.3MB in the beginning and 81.0MB in the end (delta: -15.6MB). Peak memory consumption was 14.0MB. Max. memory is 16.1GB. [2022-12-13 13:20:37,792 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 107.0MB. Free memory was 76.7MB in the beginning and 76.7MB in the end (delta: 25.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 13:20:37,792 INFO L158 Benchmark]: CACSL2BoogieTranslator took 894.24ms. Allocated memory was 107.0MB in the beginning and 134.2MB in the end (delta: 27.3MB). Free memory was 65.3MB in the beginning and 65.9MB in the end (delta: -607.5kB). Peak memory consumption was 34.7MB. Max. memory is 16.1GB. [2022-12-13 13:20:37,793 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.27ms. Allocated memory is still 134.2MB. Free memory was 65.9MB in the beginning and 63.3MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 13:20:37,793 INFO L158 Benchmark]: Boogie Preprocessor took 19.08ms. Allocated memory is still 134.2MB. Free memory was 63.3MB in the beginning and 61.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 13:20:37,794 INFO L158 Benchmark]: RCFGBuilder took 283.31ms. Allocated memory is still 134.2MB. Free memory was 61.7MB in the beginning and 98.9MB in the end (delta: -37.2MB). Peak memory consumption was 12.9MB. Max. memory is 16.1GB. [2022-12-13 13:20:37,794 INFO L158 Benchmark]: TraceAbstraction took 232.67ms. Allocated memory is still 134.2MB. Free memory was 97.7MB in the beginning and 81.0MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-12-13 13:20:37,794 INFO L158 Benchmark]: Witness Printer took 2.85ms. Allocated memory is still 134.2MB. Free memory is still 81.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 13:20:37,796 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 107.0MB. Free memory was 76.7MB in the beginning and 76.7MB in the end (delta: 25.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 894.24ms. Allocated memory was 107.0MB in the beginning and 134.2MB in the end (delta: 27.3MB). Free memory was 65.3MB in the beginning and 65.9MB in the end (delta: -607.5kB). Peak memory consumption was 34.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.27ms. Allocated memory is still 134.2MB. Free memory was 65.9MB in the beginning and 63.3MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.08ms. Allocated memory is still 134.2MB. Free memory was 63.3MB in the beginning and 61.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 283.31ms. Allocated memory is still 134.2MB. Free memory was 61.7MB in the beginning and 98.9MB in the end (delta: -37.2MB). Peak memory consumption was 12.9MB. Max. memory is 16.1GB. * TraceAbstraction took 232.67ms. Allocated memory is still 134.2MB. Free memory was 97.7MB in the beginning and 81.0MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Witness Printer took 2.85ms. Allocated memory is still 134.2MB. Free memory is still 81.0MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 1555]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: overapproximation of atoi at line 1573. 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] [L1562] CALL printLine("Calling bad()...") VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1, line={2:0}] [L1414] COND TRUE line != ((void *)0) [L1562] RET printLine("Calling bad()...") VAL [\old(argc)=1073741829, argc=1073741829, argv={1073741827:1073741831}, argv={1073741827:1073741831}, GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1563] CALL CWE191_Integer_Underflow__int_fgets_sub_61_bad() [L1551] int data; [L1552] data = 0 [L1553] CALL, EXPR CWE191_Integer_Underflow__int_fgets_sub_61b_badSource(data) [L1570] char inputBuffer[(3 * sizeof(data) + 2)] = ""; [L1571] COND TRUE fgets(inputBuffer, (3 * sizeof(data) + 2), stdin) != ((void *)0) [L1573] data = atoi(inputBuffer) [L1570] char inputBuffer[(3 * sizeof(data) + 2)] = ""; [L1580] return data; VAL [\old(data)=0, \result=-2147483648, data=-2147483648, GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1553] RET, EXPR CWE191_Integer_Underflow__int_fgets_sub_61b_badSource(data) [L1553] data = CWE191_Integer_Underflow__int_fgets_sub_61b_badSource(data) [L1555] data - 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] - UnprovableResult [Line: 1555]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-12-13 13:20:37,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_sub_61_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 1280eedf37cdcd0a55d50ddad68050c61c16bd95d7a2c9d9060d4388e6bafc10 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 13:20:39,475 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:20:39,477 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:20:39,507 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:20:39,507 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:20:39,509 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:20:39,510 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:20:39,512 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:20:39,513 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:20:39,514 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:20:39,515 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:20:39,517 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:20:39,517 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:20:39,518 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:20:39,519 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:20:39,520 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:20:39,521 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:20:39,522 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:20:39,524 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:20:39,526 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:20:39,527 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:20:39,529 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:20:39,530 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:20:39,531 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:20:39,535 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:20:39,535 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:20:39,535 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:20:39,536 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:20:39,537 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:20:39,538 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:20:39,538 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:20:39,539 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:20:39,540 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:20:39,540 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:20:39,541 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:20:39,542 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:20:39,542 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:20:39,543 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:20:39,543 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:20:39,544 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:20:39,544 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:20:39,545 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-64bit-Automizer_Bitvector.epf [2022-12-13 13:20:39,569 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:20:39,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:20:39,570 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:20:39,570 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:20:39,571 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:20:39,571 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:20:39,572 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:20:39,572 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:20:39,572 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:20:39,572 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:20:39,572 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 13:20:39,573 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:20:39,573 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 13:20:39,573 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:20:39,573 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 13:20:39,573 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 13:20:39,573 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 13:20:39,574 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-12-13 13:20:39,574 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 13:20:39,574 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 13:20:39,574 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:20:39,574 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 13:20:39,574 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:20:39,574 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:20:39,575 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:20:39,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:20:39,575 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:20:39,575 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:20:39,575 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 13:20:39,575 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 13:20:39,576 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 13:20:39,576 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:20:39,576 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 13:20:39,576 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:20:39,576 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:20:39,576 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 13:20:39,576 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:20:39,576 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1280eedf37cdcd0a55d50ddad68050c61c16bd95d7a2c9d9060d4388e6bafc10 [2022-12-13 13:20:39,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:20:39,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:20:39,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:20:39,835 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:20:39,835 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:20:39,836 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_sub_61_bad.i [2022-12-13 13:20:42,340 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:20:42,620 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:20:42,620 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_sub_61_bad.i [2022-12-13 13:20:42,638 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8/data/6b6d5d07a/955aed829e934b46ad56ec0123310241/FLAG7e13d1385 [2022-12-13 13:20:42,901 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8/data/6b6d5d07a/955aed829e934b46ad56ec0123310241 [2022-12-13 13:20:42,903 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:20:42,904 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:20:42,905 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:20:42,905 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:20:42,908 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:20:42,908 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:20:42" (1/1) ... [2022-12-13 13:20:42,909 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7abbe655 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:20:42, skipping insertion in model container [2022-12-13 13:20:42,909 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:20:42" (1/1) ... [2022-12-13 13:20:42,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:20:42,951 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:20:43,218 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-13 13:20:43,557 WARN L623 FunctionHandler]: Unknown extern function puts [2022-12-13 13:20:43,562 WARN L623 FunctionHandler]: Unknown extern function __ctype_b_loc [2022-12-13 13:20:43,563 WARN L623 FunctionHandler]: Unknown extern function __ctype_b_loc [2022-12-13 13:20:43,564 WARN L623 FunctionHandler]: Unknown extern function iswxdigit [2022-12-13 13:20:43,565 WARN L623 FunctionHandler]: Unknown extern function iswxdigit [2022-12-13 13:20:43,581 WARN L623 FunctionHandler]: Unknown extern function time [2022-12-13 13:20:43,583 WARN L623 FunctionHandler]: Unknown extern function fgets [2022-12-13 13:20:43,584 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:20:43,596 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 13:20:43,611 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-13 13:20:43,646 WARN L623 FunctionHandler]: Unknown extern function puts [2022-12-13 13:20:43,647 WARN L623 FunctionHandler]: Unknown extern function __ctype_b_loc [2022-12-13 13:20:43,648 WARN L623 FunctionHandler]: Unknown extern function __ctype_b_loc [2022-12-13 13:20:43,649 WARN L623 FunctionHandler]: Unknown extern function iswxdigit [2022-12-13 13:20:43,650 WARN L623 FunctionHandler]: Unknown extern function iswxdigit [2022-12-13 13:20:43,653 WARN L623 FunctionHandler]: Unknown extern function time [2022-12-13 13:20:43,654 WARN L623 FunctionHandler]: Unknown extern function fgets [2022-12-13 13:20:43,655 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:20:43,734 INFO L208 MainTranslator]: Completed translation [2022-12-13 13:20:43,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:20:43 WrapperNode [2022-12-13 13:20:43,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:20:43,735 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 13:20:43,735 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 13:20:43,735 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 13:20:43,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:20:43" (1/1) ... [2022-12-13 13:20:43,758 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:20:43" (1/1) ... [2022-12-13 13:20:43,778 INFO L138 Inliner]: procedures = 506, calls = 63, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 56 [2022-12-13 13:20:43,779 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 13:20:43,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 13:20:43,779 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 13:20:43,779 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 13:20:43,786 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:20:43" (1/1) ... [2022-12-13 13:20:43,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:20:43" (1/1) ... [2022-12-13 13:20:43,789 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:20:43" (1/1) ... [2022-12-13 13:20:43,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:20:43" (1/1) ... [2022-12-13 13:20:43,798 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:20:43" (1/1) ... [2022-12-13 13:20:43,800 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:20:43" (1/1) ... [2022-12-13 13:20:43,802 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:20:43" (1/1) ... [2022-12-13 13:20:43,804 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:20:43" (1/1) ... [2022-12-13 13:20:43,808 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 13:20:43,809 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 13:20:43,809 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 13:20:43,809 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 13:20:43,810 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:20:43" (1/1) ... [2022-12-13 13:20:43,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:20:43,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:20:43,836 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 13:20:43,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 13:20:43,868 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2022-12-13 13:20:43,868 INFO L130 BoogieDeclarations]: Found specification of procedure printLine [2022-12-13 13:20:43,868 INFO L138 BoogieDeclarations]: Found implementation of procedure printLine [2022-12-13 13:20:43,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 13:20:43,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 13:20:43,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 13:20:43,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 13:20:43,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 13:20:43,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 13:20:43,869 INFO L130 BoogieDeclarations]: Found specification of procedure time [2022-12-13 13:20:43,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2022-12-13 13:20:43,987 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 13:20:43,988 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 13:20:44,092 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 13:20:44,096 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 13:20:44,096 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-13 13:20:44,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:20:44 BoogieIcfgContainer [2022-12-13 13:20:44,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 13:20:44,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 13:20:44,099 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 13:20:44,101 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 13:20:44,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 01:20:42" (1/3) ... [2022-12-13 13:20:44,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@393d85ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:20:44, skipping insertion in model container [2022-12-13 13:20:44,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:20:43" (2/3) ... [2022-12-13 13:20:44,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@393d85ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:20:44, skipping insertion in model container [2022-12-13 13:20:44,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:20:44" (3/3) ... [2022-12-13 13:20:44,103 INFO L112 eAbstractionObserver]: Analyzing ICFG CWE191_Integer_Underflow__int_fgets_sub_61_bad.i [2022-12-13 13:20:44,116 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 13:20:44,117 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-13 13:20:44,151 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:20:44,156 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@39e783dc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:20:44,157 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 13:20:44,160 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 16 states have (on average 1.25) internal successors, (20), 19 states have internal predecessors, (20), 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) [2022-12-13 13:20:44,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-13 13:20:44,166 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:20:44,166 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:20:44,167 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-12-13 13:20:44,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:20:44,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1091945264, now seen corresponding path program 1 times [2022-12-13 13:20:44,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:20:44,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1845317072] [2022-12-13 13:20:44,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:20:44,184 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:20:44,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:20:44,186 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:20:44,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-13 13:20:44,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:20:44,287 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 13:20:44,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:20:44,352 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2022-12-13 13:20:44,354 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 13:20:44,355 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 2 remaining) [2022-12-13 13:20:44,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 2 remaining) [2022-12-13 13:20:44,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-13 13:20:44,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:20:44,566 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2022-12-13 13:20:44,575 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 13:20:44,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 01:20:44 BoogieIcfgContainer [2022-12-13 13:20:44,612 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 13:20:44,613 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 13:20:44,613 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 13:20:44,613 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 13:20:44,613 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:20:44" (3/4) ... [2022-12-13 13:20:44,616 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-12-13 13:20:44,616 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 13:20:44,617 INFO L158 Benchmark]: Toolchain (without parser) took 1713.16ms. Allocated memory was 73.4MB in the beginning and 88.1MB in the end (delta: 14.7MB). Free memory was 48.6MB in the beginning and 46.9MB in the end (delta: 1.7MB). Peak memory consumption was 18.0MB. Max. memory is 16.1GB. [2022-12-13 13:20:44,617 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 48.2MB. Free memory is still 27.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 13:20:44,618 INFO L158 Benchmark]: CACSL2BoogieTranslator took 830.06ms. Allocated memory is still 73.4MB. Free memory was 48.3MB in the beginning and 32.3MB in the end (delta: 16.0MB). Peak memory consumption was 26.6MB. Max. memory is 16.1GB. [2022-12-13 13:20:44,618 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.62ms. Allocated memory is still 73.4MB. Free memory was 32.3MB in the beginning and 47.4MB in the end (delta: -15.1MB). Peak memory consumption was 4.7MB. Max. memory is 16.1GB. [2022-12-13 13:20:44,619 INFO L158 Benchmark]: Boogie Preprocessor took 28.83ms. Allocated memory is still 73.4MB. Free memory was 47.4MB in the beginning and 45.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 13:20:44,619 INFO L158 Benchmark]: RCFGBuilder took 289.06ms. Allocated memory is still 73.4MB. Free memory was 45.3MB in the beginning and 31.6MB in the end (delta: 13.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-13 13:20:44,619 INFO L158 Benchmark]: TraceAbstraction took 513.11ms. Allocated memory was 73.4MB in the beginning and 88.1MB in the end (delta: 14.7MB). Free memory was 30.6MB in the beginning and 47.4MB in the end (delta: -16.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 13:20:44,620 INFO L158 Benchmark]: Witness Printer took 3.60ms. Allocated memory is still 88.1MB. Free memory was 47.4MB in the beginning and 46.9MB in the end (delta: 500.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 13:20:44,622 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 48.2MB. Free memory is still 27.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 830.06ms. Allocated memory is still 73.4MB. Free memory was 48.3MB in the beginning and 32.3MB in the end (delta: 16.0MB). Peak memory consumption was 26.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.62ms. Allocated memory is still 73.4MB. Free memory was 32.3MB in the beginning and 47.4MB in the end (delta: -15.1MB). Peak memory consumption was 4.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.83ms. Allocated memory is still 73.4MB. Free memory was 47.4MB in the beginning and 45.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 289.06ms. Allocated memory is still 73.4MB. Free memory was 45.3MB in the beginning and 31.6MB in the end (delta: 13.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 513.11ms. Allocated memory was 73.4MB in the beginning and 88.1MB in the end (delta: 14.7MB). Free memory was 30.6MB in the beginning and 47.4MB in the end (delta: -16.7MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 3.60ms. Allocated memory is still 88.1MB. Free memory was 47.4MB in the beginning and 46.9MB in the end (delta: 500.5kB). 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: 1555]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: overapproximation of atoi at line 1573. 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] [L1562] CALL printLine("Calling bad()...") VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1, line={2:0}] [L1414] COND TRUE line != ((void *)0) [L1562] 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] [L1563] CALL CWE191_Integer_Underflow__int_fgets_sub_61_bad() [L1551] int data; [L1552] data = 0 [L1553] CALL, EXPR CWE191_Integer_Underflow__int_fgets_sub_61b_badSource(data) [L1570] char inputBuffer[(3 * sizeof(data) + 2)] = ""; [L1571] COND TRUE fgets(inputBuffer, (3 * sizeof(data) + 2), stdin) != ((void *)0) [L1573] data = atoi(inputBuffer) [L1570] char inputBuffer[(3 * sizeof(data) + 2)] = ""; [L1580] return data; VAL [\old(data)=0, \result=-2147483648, data=-2147483648, GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1553] RET, EXPR CWE191_Integer_Underflow__int_fgets_sub_61b_badSource(data) [L1553] data = CWE191_Integer_Underflow__int_fgets_sub_61b_badSource(data) [L1555] data - 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] - UnprovableResult [Line: 1555]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-12-13 13:20:44,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb5234b0-d886-48df-9621-cea0fe1dcf3f/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample