./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_predec_15_bad.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_predec_15_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash d37c1ec71459106032e60eb7bc27fe3e54a637e48f0e814f643241a64f7f516e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:17:12,133 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:17:12,230 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Overflow-64bit-Taipan_Default.epf [2023-11-23 21:17:12,235 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:17:12,236 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:17:12,279 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:17:12,279 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:17:12,280 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:17:12,281 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:17:12,286 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:17:12,287 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:17:12,287 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:17:12,288 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:17:12,289 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:17:12,290 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:17:12,290 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:17:12,291 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:17:12,291 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:17:12,291 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:17:12,292 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:17:12,292 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:17:12,293 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:17:12,294 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:17:12,294 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:17:12,295 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:17:12,295 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:17:12,296 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:17:12,296 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:17:12,296 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:17:12,297 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-23 21:17:12,298 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 21:17:12,298 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:17:12,299 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:17:12,299 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:17:12,299 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:17:12,313 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:17:12,313 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:17:12,314 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:17:12,315 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:17:12,315 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:17:12,315 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:17:12,315 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:17:12,316 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:17:12,316 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:17:12,316 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:17:12,316 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:17:12,317 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d37c1ec71459106032e60eb7bc27fe3e54a637e48f0e814f643241a64f7f516e [2023-11-23 21:17:12,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:17:12,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:17:12,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:17:12,724 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:17:12,726 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:17:12,727 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_predec_15_bad.i [2023-11-23 21:17:15,974 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:17:16,454 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:17:16,455 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_predec_15_bad.i [2023-11-23 21:17:16,479 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/data/999e0978c/87b939d12ebb47b9ae34f45a6f3d4f04/FLAGfd7cfaaee [2023-11-23 21:17:16,496 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/data/999e0978c/87b939d12ebb47b9ae34f45a6f3d4f04 [2023-11-23 21:17:16,505 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:17:16,507 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:17:16,512 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:17:16,513 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:17:16,518 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:17:16,519 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:17:16" (1/1) ... [2023-11-23 21:17:16,520 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@133fd878 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:16, skipping insertion in model container [2023-11-23 21:17:16,520 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:17:16" (1/1) ... [2023-11-23 21:17:16,594 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:17:16,963 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-23 21:17:17,555 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:17:17,573 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:17:17,602 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-23 21:17:17,726 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:17:17,889 WARN L675 CHandler]: The function puts is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:17:17,889 WARN L675 CHandler]: The function __ctype_b_loc is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:17:17,889 WARN L675 CHandler]: The function iswxdigit is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:17:17,889 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:17:17,889 WARN L675 CHandler]: The function time is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:17:17,889 WARN L675 CHandler]: The function fgets is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:17:17,898 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:17:17,899 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:17 WrapperNode [2023-11-23 21:17:17,899 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:17:17,900 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:17:17,900 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:17:17,900 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:17:17,908 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:17" (1/1) ... [2023-11-23 21:17:17,972 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:17" (1/1) ... [2023-11-23 21:17:18,004 INFO L138 Inliner]: procedures = 500, calls = 68, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2023-11-23 21:17:18,005 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:17:18,006 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:17:18,006 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:17:18,006 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:17:18,016 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:17" (1/1) ... [2023-11-23 21:17:18,016 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:17" (1/1) ... [2023-11-23 21:17:18,021 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:17" (1/1) ... [2023-11-23 21:17:18,021 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:17" (1/1) ... [2023-11-23 21:17:18,029 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:17" (1/1) ... [2023-11-23 21:17:18,032 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:17" (1/1) ... [2023-11-23 21:17:18,034 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:17" (1/1) ... [2023-11-23 21:17:18,036 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:17" (1/1) ... [2023-11-23 21:17:18,039 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:17:18,040 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:17:18,040 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:17:18,040 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:17:18,041 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:17" (1/1) ... [2023-11-23 21:17:18,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:17:18,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:17:18,079 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:17:18,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:17:18,124 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2023-11-23 21:17:18,124 INFO L130 BoogieDeclarations]: Found specification of procedure printLine [2023-11-23 21:17:18,124 INFO L138 BoogieDeclarations]: Found implementation of procedure printLine [2023-11-23 21:17:18,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:17:18,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-23 21:17:18,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:17:18,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:17:18,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:17:18,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:17:18,125 INFO L130 BoogieDeclarations]: Found specification of procedure time [2023-11-23 21:17:18,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:17:18,326 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:17:18,329 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:17:18,467 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:17:18,516 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:17:18,516 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:17:18,518 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:17:18 BoogieIcfgContainer [2023-11-23 21:17:18,518 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:17:18,520 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:17:18,520 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:17:18,524 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:17:18,524 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:17:16" (1/3) ... [2023-11-23 21:17:18,525 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c07c0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:17:18, skipping insertion in model container [2023-11-23 21:17:18,525 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:17" (2/3) ... [2023-11-23 21:17:18,526 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c07c0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:17:18, skipping insertion in model container [2023-11-23 21:17:18,526 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:17:18" (3/3) ... [2023-11-23 21:17:18,527 INFO L112 eAbstractionObserver]: Analyzing ICFG CWE191_Integer_Underflow__int_fgets_predec_15_bad.i [2023-11-23 21:17:18,549 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:17:18,549 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-23 21:17:18,603 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:17:18,610 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=LoopHeads, 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;@79e1222d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:17:18,610 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-23 21:17:18,614 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 14 states have (on average 1.5) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-23 21:17:18,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 21:17:18,623 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:18,623 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:18,624 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-23 21:17:18,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:18,630 INFO L85 PathProgramCache]: Analyzing trace with hash 80527126, now seen corresponding path program 1 times [2023-11-23 21:17:18,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:18,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786210320] [2023-11-23 21:17:18,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:18,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:18,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:18,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:17:18,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:18,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786210320] [2023-11-23 21:17:18,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786210320] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:18,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:18,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:18,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113068388] [2023-11-23 21:17:18,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:18,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:18,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:18,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:18,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:18,943 INFO L87 Difference]: Start difference. First operand has 23 states, 14 states have (on average 1.5) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-11-23 21:17:18,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:18,985 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2023-11-23 21:17:18,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:18,988 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 10 [2023-11-23 21:17:18,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:18,995 INFO L225 Difference]: With dead ends: 37 [2023-11-23 21:17:18,995 INFO L226 Difference]: Without dead ends: 15 [2023-11-23 21:17:18,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:19,003 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:19,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 34 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:17:19,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-23 21:17:19,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-23 21:17:19,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 12 states have internal predecessors, (12), 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) [2023-11-23 21:17:19,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2023-11-23 21:17:19,047 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2023-11-23 21:17:19,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:19,049 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2023-11-23 21:17:19,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-11-23 21:17:19,050 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2023-11-23 21:17:19,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-23 21:17:19,052 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:19,052 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:19,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:17:19,053 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-23 21:17:19,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:19,054 INFO L85 PathProgramCache]: Analyzing trace with hash -2097224460, now seen corresponding path program 1 times [2023-11-23 21:17:19,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:19,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416276060] [2023-11-23 21:17:19,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:19,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:19,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:17:19,133 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 21:17:19,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:17:19,200 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-23 21:17:19,201 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-23 21:17:19,203 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 2 remaining) [2023-11-23 21:17:19,206 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 2 remaining) [2023-11-23 21:17:19,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:17:19,211 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-23 21:17:19,219 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-23 21:17:19,243 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch98 could not be translated [2023-11-23 21:17:19,244 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch101 could not be translated [2023-11-23 21:17:19,244 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch101 could not be translated [2023-11-23 21:17:19,257 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 09:17:19 BoogieIcfgContainer [2023-11-23 21:17:19,257 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-23 21:17:19,258 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-23 21:17:19,258 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-23 21:17:19,258 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-23 21:17:19,259 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:17:18" (3/4) ... [2023-11-23 21:17:19,261 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-23 21:17:19,262 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-23 21:17:19,263 INFO L158 Benchmark]: Toolchain (without parser) took 2756.60ms. Allocated memory is still 165.7MB. Free memory was 134.3MB in the beginning and 77.4MB in the end (delta: 56.9MB). Peak memory consumption was 53.7MB. Max. memory is 16.1GB. [2023-11-23 21:17:19,264 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 130.0MB. Free memory is still 103.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:17:19,264 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1386.82ms. Allocated memory is still 165.7MB. Free memory was 134.3MB in the beginning and 129.8MB in the end (delta: 4.6MB). Peak memory consumption was 67.1MB. Max. memory is 16.1GB. [2023-11-23 21:17:19,265 INFO L158 Benchmark]: Boogie Procedure Inliner took 105.10ms. Allocated memory is still 165.7MB. Free memory was 129.8MB in the beginning and 126.6MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-23 21:17:19,266 INFO L158 Benchmark]: Boogie Preprocessor took 33.55ms. Allocated memory is still 165.7MB. Free memory was 126.6MB in the beginning and 124.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 21:17:19,266 INFO L158 Benchmark]: RCFGBuilder took 478.22ms. Allocated memory is still 165.7MB. Free memory was 124.6MB in the beginning and 108.9MB in the end (delta: 15.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-23 21:17:19,273 INFO L158 Benchmark]: TraceAbstraction took 736.80ms. Allocated memory is still 165.7MB. Free memory was 108.9MB in the beginning and 77.4MB in the end (delta: 31.5MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2023-11-23 21:17:19,274 INFO L158 Benchmark]: Witness Printer took 4.81ms. Allocated memory is still 165.7MB. Free memory is still 77.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:17:19,287 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 130.0MB. Free memory is still 103.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1386.82ms. Allocated memory is still 165.7MB. Free memory was 134.3MB in the beginning and 129.8MB in the end (delta: 4.6MB). Peak memory consumption was 67.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 105.10ms. Allocated memory is still 165.7MB. Free memory was 129.8MB in the beginning and 126.6MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.55ms. Allocated memory is still 165.7MB. Free memory was 126.6MB in the beginning and 124.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 478.22ms. Allocated memory is still 165.7MB. Free memory was 124.6MB in the beginning and 108.9MB in the end (delta: 15.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 736.80ms. Allocated memory is still 165.7MB. Free memory was 108.9MB in the beginning and 77.4MB in the end (delta: 31.5MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * Witness Printer took 4.81ms. Allocated memory is still 165.7MB. Free memory is still 77.4MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch98 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch101 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch101 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * 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: 1575]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: overapproximation of atoi at line 1559. 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); [L1588] 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={6:0}] [L1414] COND TRUE line != ((void *)0) [L1588] RET printLine("Calling bad()...") VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, \old(argc)=1073741826, argc=1073741826, argv={1073741829:1073741828}, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1589] CALL CWE191_Integer_Underflow__int_fgets_predec_15_bad() [L1550] int data; [L1551] data = 0 [L1554] case 6: [L1556] char inputBuffer[(3 * sizeof(data) + 2)] = ""; [L1557] COND TRUE, EXPR fgets(inputBuffer, (3 * sizeof(data) + 2), stdin) != ((void *)0) [L1559] EXPR data = atoi(inputBuffer) [L1556] char inputBuffer[(3 * sizeof(data) + 2)] = ""; [L1555-L1565] { char inputBuffer[(3 * sizeof(data) + 2)] = ""; if (fgets(inputBuffer, (3 * sizeof(data) + 2), stdin) != ((void *)0)) { data = atoi(inputBuffer); } else { printLine("fgets() failed."); } } VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, data=-2147483648, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1573] case 7: VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, data=-2147483648, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1575] --data VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, data=-2147483648, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] - UnprovableResult [Line: 1575]: 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: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4 mSDsluCounter, 34 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 14 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12 IncrementalHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 20 mSDtfsCounter, 12 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, InterpolantAutomatonStates: 3, 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, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 9 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 [2023-11-23 21:17:19,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_predec_15_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Overflow-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash d37c1ec71459106032e60eb7bc27fe3e54a637e48f0e814f643241a64f7f516e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:17:22,219 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:17:22,312 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Overflow-64bit-Taipan_Bitvector.epf [2023-11-23 21:17:22,318 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:17:22,319 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:17:22,349 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:17:22,350 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:17:22,350 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:17:22,351 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:17:22,352 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:17:22,353 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:17:22,354 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:17:22,354 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:17:22,355 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:17:22,356 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:17:22,357 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:17:22,358 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:17:22,358 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:17:22,359 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:17:22,359 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:17:22,360 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:17:22,361 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:17:22,362 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 21:17:22,362 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-23 21:17:22,363 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-23 21:17:22,364 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-23 21:17:22,364 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 21:17:22,365 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:17:22,366 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:17:22,366 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:17:22,367 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 21:17:22,368 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:17:22,368 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:17:22,369 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:17:22,370 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:17:22,370 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:17:22,371 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:17:22,372 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-23 21:17:22,372 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-23 21:17:22,373 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:17:22,373 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:17:22,374 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:17:22,374 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:17:22,375 INFO L153 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_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d37c1ec71459106032e60eb7bc27fe3e54a637e48f0e814f643241a64f7f516e [2023-11-23 21:17:22,740 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:17:22,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:17:22,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:17:22,776 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:17:22,778 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:17:22,781 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_predec_15_bad.i [2023-11-23 21:17:26,055 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:17:26,535 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:17:26,535 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_predec_15_bad.i [2023-11-23 21:17:26,572 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/data/a1d085c48/af228117e933441995bc40e46f6d1bcf/FLAGf28ba1329 [2023-11-23 21:17:26,590 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/data/a1d085c48/af228117e933441995bc40e46f6d1bcf [2023-11-23 21:17:26,597 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:17:26,599 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:17:26,602 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:17:26,602 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:17:26,608 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:17:26,608 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:17:26" (1/1) ... [2023-11-23 21:17:26,612 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@df92724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:26, skipping insertion in model container [2023-11-23 21:17:26,612 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:17:26" (1/1) ... [2023-11-23 21:17:26,709 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:17:27,105 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-23 21:17:27,706 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:17:27,740 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:17:27,775 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-23 21:17:27,882 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:17:28,047 WARN L675 CHandler]: The function puts is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:17:28,048 WARN L675 CHandler]: The function __ctype_b_loc is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:17:28,048 WARN L675 CHandler]: The function iswxdigit is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:17:28,048 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:17:28,049 WARN L675 CHandler]: The function time is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:17:28,049 WARN L675 CHandler]: The function fgets is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:17:28,060 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:17:28,061 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:28 WrapperNode [2023-11-23 21:17:28,061 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:17:28,063 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:17:28,064 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:17:28,064 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:17:28,072 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:28" (1/1) ... [2023-11-23 21:17:28,112 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:28" (1/1) ... [2023-11-23 21:17:28,137 INFO L138 Inliner]: procedures = 505, calls = 68, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2023-11-23 21:17:28,138 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:17:28,139 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:17:28,139 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:17:28,139 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:17:28,149 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:28" (1/1) ... [2023-11-23 21:17:28,150 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:28" (1/1) ... [2023-11-23 21:17:28,154 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:28" (1/1) ... [2023-11-23 21:17:28,155 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:28" (1/1) ... [2023-11-23 21:17:28,164 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:28" (1/1) ... [2023-11-23 21:17:28,166 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:28" (1/1) ... [2023-11-23 21:17:28,170 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:28" (1/1) ... [2023-11-23 21:17:28,173 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:28" (1/1) ... [2023-11-23 21:17:28,179 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:17:28,180 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:17:28,180 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:17:28,180 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:17:28,195 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:28" (1/1) ... [2023-11-23 21:17:28,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:17:28,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:17:28,229 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:17:28,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:17:28,270 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2023-11-23 21:17:28,271 INFO L130 BoogieDeclarations]: Found specification of procedure printLine [2023-11-23 21:17:28,271 INFO L138 BoogieDeclarations]: Found implementation of procedure printLine [2023-11-23 21:17:28,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:17:28,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-23 21:17:28,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:17:28,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:17:28,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:17:28,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:17:28,272 INFO L130 BoogieDeclarations]: Found specification of procedure time [2023-11-23 21:17:28,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2023-11-23 21:17:28,431 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:17:28,434 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:17:28,663 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:17:28,699 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:17:28,699 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:17:28,700 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:17:28 BoogieIcfgContainer [2023-11-23 21:17:28,700 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:17:28,702 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:17:28,702 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:17:28,710 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:17:28,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:17:26" (1/3) ... [2023-11-23 21:17:28,712 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634375 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:17:28, skipping insertion in model container [2023-11-23 21:17:28,741 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:28" (2/3) ... [2023-11-23 21:17:28,741 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634375 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:17:28, skipping insertion in model container [2023-11-23 21:17:28,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:17:28" (3/3) ... [2023-11-23 21:17:28,743 INFO L112 eAbstractionObserver]: Analyzing ICFG CWE191_Integer_Underflow__int_fgets_predec_15_bad.i [2023-11-23 21:17:28,763 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:17:28,763 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-23 21:17:28,822 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:17:28,828 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=LoopHeads, 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;@11ec1e6d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:17:28,829 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-23 21:17:28,833 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.5) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-23 21:17:28,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-23 21:17:28,842 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:28,843 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:28,843 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-23 21:17:28,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:28,850 INFO L85 PathProgramCache]: Analyzing trace with hash 991721887, now seen corresponding path program 1 times [2023-11-23 21:17:28,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:17:28,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [619203847] [2023-11-23 21:17:28,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:28,867 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 [2023-11-23 21:17:28,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:17:28,871 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/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) [2023-11-23 21:17:28,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/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 [2023-11-23 21:17:29,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:29,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:17:29,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:17:29,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:17:29,070 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:17:29,071 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:17:29,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [619203847] [2023-11-23 21:17:29,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [619203847] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:29,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:29,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:29,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862200070] [2023-11-23 21:17:29,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:29,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:29,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:17:29,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:29,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:29,122 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.5) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2023-11-23 21:17:29,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:29,173 INFO L93 Difference]: Finished difference Result 40 states and 53 transitions. [2023-11-23 21:17:29,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:29,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 12 [2023-11-23 21:17:29,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:29,184 INFO L225 Difference]: With dead ends: 40 [2023-11-23 21:17:29,184 INFO L226 Difference]: Without dead ends: 15 [2023-11-23 21:17:29,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:29,191 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 4 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:29,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 40 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:17:29,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-23 21:17:29,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-23 21:17:29,227 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) [2023-11-23 21:17:29,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-11-23 21:17:29,232 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2023-11-23 21:17:29,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:29,234 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-11-23 21:17:29,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2023-11-23 21:17:29,235 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-11-23 21:17:29,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-23 21:17:29,238 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:29,238 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:29,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/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 [2023-11-23 21:17:29,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/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 [2023-11-23 21:17:29,442 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-23 21:17:29,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:29,443 INFO L85 PathProgramCache]: Analyzing trace with hash 380009355, now seen corresponding path program 1 times [2023-11-23 21:17:29,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:17:29,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [798693728] [2023-11-23 21:17:29,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:29,447 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 [2023-11-23 21:17:29,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:17:29,453 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/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) [2023-11-23 21:17:29,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/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 [2023-11-23 21:17:29,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:17:29,591 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 21:17:29,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:17:29,663 INFO L130 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2023-11-23 21:17:29,663 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-23 21:17:29,665 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 2 remaining) [2023-11-23 21:17:29,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 2 remaining) [2023-11-23 21:17:29,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/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 [2023-11-23 21:17:29,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/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 [2023-11-23 21:17:29,872 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-23 21:17:29,875 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-23 21:17:29,895 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch96 could not be translated [2023-11-23 21:17:29,896 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch99 could not be translated [2023-11-23 21:17:29,897 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch99 could not be translated [2023-11-23 21:17:29,905 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 09:17:29 BoogieIcfgContainer [2023-11-23 21:17:29,905 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-23 21:17:29,906 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-23 21:17:29,906 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-23 21:17:29,907 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-23 21:17:29,907 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:17:28" (3/4) ... [2023-11-23 21:17:29,909 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-23 21:17:29,911 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-23 21:17:29,913 INFO L158 Benchmark]: Toolchain (without parser) took 3313.10ms. Allocated memory is still 104.9MB. Free memory was 77.2MB in the beginning and 45.1MB in the end (delta: 32.1MB). Peak memory consumption was 34.2MB. Max. memory is 16.1GB. [2023-11-23 21:17:29,920 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 65.0MB. Free memory was 41.1MB in the beginning and 41.0MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:17:29,920 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1460.64ms. Allocated memory is still 104.9MB. Free memory was 76.9MB in the beginning and 67.8MB in the end (delta: 9.1MB). Peak memory consumption was 35.1MB. Max. memory is 16.1GB. [2023-11-23 21:17:29,921 INFO L158 Benchmark]: Boogie Procedure Inliner took 74.68ms. Allocated memory is still 104.9MB. Free memory was 67.8MB in the beginning and 65.1MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-23 21:17:29,921 INFO L158 Benchmark]: Boogie Preprocessor took 40.64ms. Allocated memory is still 104.9MB. Free memory was 65.1MB in the beginning and 62.6MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 21:17:29,922 INFO L158 Benchmark]: RCFGBuilder took 520.01ms. Allocated memory is still 104.9MB. Free memory was 62.6MB in the beginning and 45.3MB in the end (delta: 17.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-23 21:17:29,922 INFO L158 Benchmark]: TraceAbstraction took 1203.43ms. Allocated memory is still 104.9MB. Free memory was 44.8MB in the beginning and 45.7MB in the end (delta: -943.8kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:17:29,923 INFO L158 Benchmark]: Witness Printer took 5.41ms. Allocated memory is still 104.9MB. Free memory was 45.7MB in the beginning and 45.1MB in the end (delta: 602.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 21:17:29,925 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 65.0MB. Free memory was 41.1MB in the beginning and 41.0MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1460.64ms. Allocated memory is still 104.9MB. Free memory was 76.9MB in the beginning and 67.8MB in the end (delta: 9.1MB). Peak memory consumption was 35.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 74.68ms. Allocated memory is still 104.9MB. Free memory was 67.8MB in the beginning and 65.1MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.64ms. Allocated memory is still 104.9MB. Free memory was 65.1MB in the beginning and 62.6MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 520.01ms. Allocated memory is still 104.9MB. Free memory was 62.6MB in the beginning and 45.3MB in the end (delta: 17.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 1203.43ms. Allocated memory is still 104.9MB. Free memory was 44.8MB in the beginning and 45.7MB in the end (delta: -943.8kB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 5.41ms. Allocated memory is still 104.9MB. Free memory was 45.7MB in the beginning and 45.1MB in the end (delta: 602.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch96 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch99 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch99 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * 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: 1575]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: overapproximation of atoi at line 1559. 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); [L1588] 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={6:0}] [L1414] COND TRUE line != ((void *)0) [L1588] RET printLine("Calling bad()...") VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, \old(argc)=12, argc=12, argv={13:12}, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1589] CALL CWE191_Integer_Underflow__int_fgets_predec_15_bad() [L1550] int data; [L1551] data = 0 [L1554] case 6: [L1556] char inputBuffer[(3 * sizeof(data) + 2)] = ""; [L1557] COND TRUE, EXPR fgets(inputBuffer, (3 * sizeof(data) + 2), stdin) != ((void *)0) [L1559] EXPR data = atoi(inputBuffer) [L1556] char inputBuffer[(3 * sizeof(data) + 2)] = ""; [L1555-L1565] { char inputBuffer[(3 * sizeof(data) + 2)] = ""; if (fgets(inputBuffer, (3 * sizeof(data) + 2), stdin) != ((void *)0)) { data = atoi(inputBuffer); } else { printLine("fgets() failed."); } } VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, data=-2147483648, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1573] case 7: VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, data=-2147483648, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1575] --data VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, data=-2147483648, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] - UnprovableResult [Line: 1575]: 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, 25 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, 5 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4 mSDsluCounter, 40 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 17 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10 IncrementalHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 23 mSDtfsCounter, 10 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, InterpolantAutomatonStates: 3, 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, 25 NumberOfCodeBlocks, 25 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 11 SizeOfPredicates, 0 NumberOfNonLiveVariables, 51 ConjunctsInSsa, 2 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 [2023-11-23 21:17:29,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7edbb04d-96a7-4337-8289-632451b73a6a/bin/utaipan-verify-mE87zJ7Ire/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