./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_postdec_32_bad.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 527bcce2 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_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_postdec_32_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5 --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 edf890099c9798c9c69d8dd05768ded1c839c8369ee71e4a749a5027b8540470 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:45:31,852 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:45:31,974 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Overflow-64bit-Taipan_Default.epf [2023-11-21 19:45:31,985 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:45:31,986 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:45:32,026 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:45:32,026 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:45:32,027 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:45:32,028 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:45:32,033 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:45:32,034 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:45:32,035 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:45:32,036 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:45:32,037 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:45:32,038 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:45:32,038 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:45:32,039 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:45:32,039 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:45:32,040 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:45:32,040 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:45:32,041 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:45:32,042 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:45:32,043 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:45:32,043 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:45:32,044 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:45:32,044 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:45:32,045 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:45:32,045 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:45:32,046 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:45:32,046 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-21 19:45:32,048 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 19:45:32,048 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:45:32,048 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:45:32,049 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:45:32,049 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:45:32,050 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:45:32,050 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:45:32,050 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:45:32,051 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:45:32,051 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:45:32,051 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:45:32,052 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:45:32,052 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:45:32,052 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:45:32,053 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:45:32,053 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:45:32,054 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_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> edf890099c9798c9c69d8dd05768ded1c839c8369ee71e4a749a5027b8540470 [2023-11-21 19:45:32,391 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:45:32,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:45:32,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:45:32,430 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:45:32,432 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:45:32,434 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_postdec_32_bad.i [2023-11-21 19:45:35,557 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:45:35,958 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:45:35,959 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf07c02-458c-4916-aaeb-0872230c7ec1/sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_postdec_32_bad.i [2023-11-21 19:45:35,998 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5/data/b8a7e5acc/63f9dfd3fcee4bb59ade682dca306da8/FLAGc4e0d8f6e [2023-11-21 19:45:36,015 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5/data/b8a7e5acc/63f9dfd3fcee4bb59ade682dca306da8 [2023-11-21 19:45:36,018 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:45:36,019 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:45:36,021 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:45:36,021 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:45:36,027 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:45:36,027 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:45:36" (1/1) ... [2023-11-21 19:45:36,028 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54451389 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:36, skipping insertion in model container [2023-11-21 19:45:36,029 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:45:36" (1/1) ... [2023-11-21 19:45:36,088 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:45:36,554 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-21 19:45:37,167 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:45:37,185 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:45:37,205 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-21 19:45:37,290 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:45:37,421 WARN L675 CHandler]: The function puts is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:45:37,422 WARN L675 CHandler]: The function __ctype_b_loc is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:45:37,422 WARN L675 CHandler]: The function iswxdigit is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:45:37,422 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:45:37,422 WARN L675 CHandler]: The function time is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:45:37,423 WARN L675 CHandler]: The function fgets is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:45:37,429 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:45:37,429 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:37 WrapperNode [2023-11-21 19:45:37,430 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:45:37,431 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:45:37,431 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:45:37,431 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:45:37,439 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:37" (1/1) ... [2023-11-21 19:45:37,467 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:37" (1/1) ... [2023-11-21 19:45:37,520 INFO L138 Inliner]: procedures = 500, calls = 70, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 67 [2023-11-21 19:45:37,521 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:45:37,521 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:45:37,522 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:45:37,522 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:45:37,531 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:37" (1/1) ... [2023-11-21 19:45:37,531 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:37" (1/1) ... [2023-11-21 19:45:37,534 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:37" (1/1) ... [2023-11-21 19:45:37,535 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:37" (1/1) ... [2023-11-21 19:45:37,558 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:37" (1/1) ... [2023-11-21 19:45:37,560 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:37" (1/1) ... [2023-11-21 19:45:37,564 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:37" (1/1) ... [2023-11-21 19:45:37,566 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:37" (1/1) ... [2023-11-21 19:45:37,569 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:45:37,586 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:45:37,586 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:45:37,586 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:45:37,587 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:37" (1/1) ... [2023-11-21 19:45:37,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:45:37,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:45:37,623 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:45:37,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:45:37,655 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2023-11-21 19:45:37,656 INFO L130 BoogieDeclarations]: Found specification of procedure printLine [2023-11-21 19:45:37,656 INFO L138 BoogieDeclarations]: Found implementation of procedure printLine [2023-11-21 19:45:37,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 19:45:37,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-21 19:45:37,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 19:45:37,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:45:37,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:45:37,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:45:37,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 19:45:37,657 INFO L130 BoogieDeclarations]: Found specification of procedure time [2023-11-21 19:45:37,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 19:45:37,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:45:37,819 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:45:37,822 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:45:38,062 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:45:38,130 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:45:38,130 INFO L308 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-21 19:45:38,132 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:45:38 BoogieIcfgContainer [2023-11-21 19:45:38,132 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:45:38,135 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:45:38,137 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:45:38,140 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:45:38,140 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:45:36" (1/3) ... [2023-11-21 19:45:38,141 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f846154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:45:38, skipping insertion in model container [2023-11-21 19:45:38,141 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:37" (2/3) ... [2023-11-21 19:45:38,142 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f846154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:45:38, skipping insertion in model container [2023-11-21 19:45:38,142 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:45:38" (3/3) ... [2023-11-21 19:45:38,144 INFO L112 eAbstractionObserver]: Analyzing ICFG CWE191_Integer_Underflow__int_fgets_postdec_32_bad.i [2023-11-21 19:45:38,159 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:45:38,159 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-21 19:45:38,201 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:45:38,207 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;@64560aed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:45:38,207 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-21 19:45:38,211 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 8 states have (on average 1.375) internal successors, (11), 11 states have internal predecessors, (11), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 19:45:38,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-21 19:45:38,217 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:45:38,217 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:45:38,218 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-21 19:45:38,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:45:38,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1878054798, now seen corresponding path program 1 times [2023-11-21 19:45:38,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:45:38,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426650438] [2023-11-21 19:45:38,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:45:38,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:45:38,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 19:45:38,411 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 19:45:38,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 19:45:38,525 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-21 19:45:38,527 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 19:45:38,528 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 2 remaining) [2023-11-21 19:45:38,534 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 2 remaining) [2023-11-21 19:45:38,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:45:38,539 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-21 19:45:38,545 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-21 19:45:38,564 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post102 could not be translated [2023-11-21 19:45:38,574 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 07:45:38 BoogieIcfgContainer [2023-11-21 19:45:38,574 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-21 19:45:38,575 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-21 19:45:38,575 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-21 19:45:38,575 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-21 19:45:38,576 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:45:38" (3/4) ... [2023-11-21 19:45:38,578 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-21 19:45:38,579 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-21 19:45:38,580 INFO L158 Benchmark]: Toolchain (without parser) took 2560.64ms. Allocated memory is still 188.7MB. Free memory was 134.1MB in the beginning and 120.2MB in the end (delta: 13.9MB). Peak memory consumption was 15.4MB. Max. memory is 16.1GB. [2023-11-21 19:45:38,581 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 146.8MB. Free memory is still 89.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 19:45:38,581 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1409.07ms. Allocated memory is still 188.7MB. Free memory was 134.1MB in the beginning and 74.0MB in the end (delta: 60.1MB). Peak memory consumption was 60.8MB. Max. memory is 16.1GB. [2023-11-21 19:45:38,582 INFO L158 Benchmark]: Boogie Procedure Inliner took 90.36ms. Allocated memory is still 188.7MB. Free memory was 74.0MB in the beginning and 154.1MB in the end (delta: -80.1MB). Peak memory consumption was 9.8MB. Max. memory is 16.1GB. [2023-11-21 19:45:38,583 INFO L158 Benchmark]: Boogie Preprocessor took 48.28ms. Allocated memory is still 188.7MB. Free memory was 154.1MB in the beginning and 156.9MB in the end (delta: -2.8MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. [2023-11-21 19:45:38,583 INFO L158 Benchmark]: RCFGBuilder took 546.84ms. Allocated memory is still 188.7MB. Free memory was 156.9MB in the beginning and 140.2MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-21 19:45:38,584 INFO L158 Benchmark]: TraceAbstraction took 439.47ms. Allocated memory is still 188.7MB. Free memory was 139.1MB in the beginning and 120.2MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-11-21 19:45:38,584 INFO L158 Benchmark]: Witness Printer took 4.45ms. Allocated memory is still 188.7MB. Free memory is still 120.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 19:45:38,588 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 146.8MB. Free memory is still 89.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1409.07ms. Allocated memory is still 188.7MB. Free memory was 134.1MB in the beginning and 74.0MB in the end (delta: 60.1MB). Peak memory consumption was 60.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 90.36ms. Allocated memory is still 188.7MB. Free memory was 74.0MB in the beginning and 154.1MB in the end (delta: -80.1MB). Peak memory consumption was 9.8MB. Max. memory is 16.1GB. * Boogie Preprocessor took 48.28ms. Allocated memory is still 188.7MB. Free memory was 154.1MB in the beginning and 156.9MB in the end (delta: -2.8MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. * RCFGBuilder took 546.84ms. Allocated memory is still 188.7MB. Free memory was 156.9MB in the beginning and 140.2MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 439.47ms. Allocated memory is still 188.7MB. Free memory was 139.1MB in the beginning and 120.2MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Witness Printer took 4.45ms. Allocated memory is still 188.7MB. Free memory is still 120.2MB. 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~post102 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: 1572]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: overapproximation of atoi at line 1560. Possible FailurePath: [L1522] const int GLOBAL_CONST_TRUE = 1; [L1523] const int GLOBAL_CONST_FALSE = 0; [L1524] const int GLOBAL_CONST_FIVE = 5; [L1525] int globalTrue = 1; [L1526] int globalFalse = 0; [L1527] int globalFive = 5; [L1546] int globalArgc = 0; [L1547] char** globalArgv = ((void *)0); [L1581] CALL printLine("Calling bad()...") VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1, line={4:0}] [L1414] COND TRUE line != ((void *)0) [L1581] RET printLine("Calling bad()...") VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, \old(argc)=1073741827, argc=1073741827, argv={1073741831:1073741830}, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1582] CALL CWE191_Integer_Underflow__int_fgets_postdec_32_bad() [L1550] int data; [L1551] int *dataPtr1 = &data; [L1552] int *dataPtr2 = &data; [L1553] data = 0 [L1555] EXPR \read(*dataPtr1) [L1555] int data = *dataPtr1; [L1557] char inputBuffer[(3 * sizeof(data) + 2)] = ""; [L1558] COND TRUE, EXPR fgets(inputBuffer, (3 * sizeof(data) + 2), stdin) != ((void *)0) [L1560] EXPR data = atoi(inputBuffer) [L1557] char inputBuffer[(3 * sizeof(data) + 2)] = ""; [L1556-L1566] { char inputBuffer[(3 * sizeof(data) + 2)] = ""; if (fgets(inputBuffer, (3 * sizeof(data) + 2), stdin) != ((void *)0)) { data = atoi(inputBuffer); } else { printLine("fgets() failed."); } } [L1567] EXPR *dataPtr1 = data [L1554-L1568] { int data = *dataPtr1; { char inputBuffer[(3 * sizeof(data) + 2)] = ""; if (fgets(inputBuffer, (3 * sizeof(data) + 2), stdin) != ((void *)0)) { data = atoi(inputBuffer); } else { printLine("fgets() failed."); } } *dataPtr1 = data; } [L1570] EXPR \read(*dataPtr2) [L1570] int data = *dataPtr2; [L1572] data-- VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, data=-2147483648, data={7:0}, dataPtr1={7:0}, dataPtr2={7:0}, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] - UnprovableResult [Line: 1572]: 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, 15 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 8 NumberOfCodeBlocks, 8 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-11-21 19:45:38,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5/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_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_postdec_32_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Overflow-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5 --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 edf890099c9798c9c69d8dd05768ded1c839c8369ee71e4a749a5027b8540470 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:45:41,308 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:45:41,441 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Overflow-64bit-Taipan_Bitvector.epf [2023-11-21 19:45:41,449 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:45:41,450 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:45:41,492 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:45:41,493 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:45:41,493 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:45:41,494 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:45:41,499 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:45:41,500 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:45:41,500 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:45:41,500 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:45:41,502 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:45:41,503 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:45:41,503 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:45:41,504 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:45:41,505 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:45:41,505 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:45:41,505 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:45:41,506 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:45:41,506 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:45:41,507 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 19:45:41,507 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-21 19:45:41,508 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-21 19:45:41,508 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-21 19:45:41,508 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 19:45:41,509 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:45:41,509 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:45:41,510 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:45:41,511 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 19:45:41,511 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:45:41,511 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:45:41,512 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:45:41,512 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:45:41,513 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:45:41,513 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:45:41,513 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-21 19:45:41,513 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-21 19:45:41,514 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:45:41,515 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:45:41,515 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:45:41,515 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:45:41,515 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_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> edf890099c9798c9c69d8dd05768ded1c839c8369ee71e4a749a5027b8540470 [2023-11-21 19:45:41,901 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:45:41,932 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:45:41,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:45:41,936 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:45:41,936 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:45:41,937 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_postdec_32_bad.i [2023-11-21 19:45:45,036 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:45:45,567 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:45:45,570 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf07c02-458c-4916-aaeb-0872230c7ec1/sv-benchmarks/c/Juliet_Test/CWE191_Integer_Underflow__int_fgets_postdec_32_bad.i [2023-11-21 19:45:45,606 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5/data/d217c1553/0039a8cc3f2e4e28bd622674f7e21f50/FLAG583a6abf0 [2023-11-21 19:45:45,625 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5/data/d217c1553/0039a8cc3f2e4e28bd622674f7e21f50 [2023-11-21 19:45:45,631 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:45:45,632 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:45:45,636 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:45:45,636 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:45:45,641 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:45:45,642 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:45:45" (1/1) ... [2023-11-21 19:45:45,643 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bafb188 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:45, skipping insertion in model container [2023-11-21 19:45:45,643 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:45:45" (1/1) ... [2023-11-21 19:45:45,734 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:45:46,170 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-21 19:45:46,797 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:45:46,812 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:45:46,836 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-21 19:45:46,961 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:45:47,186 WARN L675 CHandler]: The function puts is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:45:47,186 WARN L675 CHandler]: The function __ctype_b_loc is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:45:47,187 WARN L675 CHandler]: The function iswxdigit is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:45:47,188 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:45:47,188 WARN L675 CHandler]: The function time is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:45:47,188 WARN L675 CHandler]: The function fgets is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:45:47,196 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:45:47,198 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:47 WrapperNode [2023-11-21 19:45:47,198 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:45:47,199 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:45:47,200 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:45:47,200 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:45:47,208 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:47" (1/1) ... [2023-11-21 19:45:47,253 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:47" (1/1) ... [2023-11-21 19:45:47,293 INFO L138 Inliner]: procedures = 505, calls = 70, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 66 [2023-11-21 19:45:47,294 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:45:47,295 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:45:47,295 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:45:47,295 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:45:47,305 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:47" (1/1) ... [2023-11-21 19:45:47,305 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:47" (1/1) ... [2023-11-21 19:45:47,310 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:47" (1/1) ... [2023-11-21 19:45:47,310 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:47" (1/1) ... [2023-11-21 19:45:47,324 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:47" (1/1) ... [2023-11-21 19:45:47,326 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:47" (1/1) ... [2023-11-21 19:45:47,346 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:47" (1/1) ... [2023-11-21 19:45:47,360 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:47" (1/1) ... [2023-11-21 19:45:47,365 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:45:47,365 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:45:47,366 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:45:47,366 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:45:47,367 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:47" (1/1) ... [2023-11-21 19:45:47,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:45:47,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:45:47,427 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:45:47,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:45:47,469 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2023-11-21 19:45:47,470 INFO L130 BoogieDeclarations]: Found specification of procedure printLine [2023-11-21 19:45:47,470 INFO L138 BoogieDeclarations]: Found implementation of procedure printLine [2023-11-21 19:45:47,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 19:45:47,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-21 19:45:47,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:45:47,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:45:47,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:45:47,471 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-21 19:45:47,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 19:45:47,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-21 19:45:47,471 INFO L130 BoogieDeclarations]: Found specification of procedure time [2023-11-21 19:45:47,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2023-11-21 19:45:47,654 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:45:47,656 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:45:47,983 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:45:48,054 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:45:48,054 INFO L308 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-21 19:45:48,056 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:45:48 BoogieIcfgContainer [2023-11-21 19:45:48,056 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:45:48,059 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:45:48,060 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:45:48,063 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:45:48,063 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:45:45" (1/3) ... [2023-11-21 19:45:48,065 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a87f628 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:45:48, skipping insertion in model container [2023-11-21 19:45:48,065 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:47" (2/3) ... [2023-11-21 19:45:48,066 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a87f628 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:45:48, skipping insertion in model container [2023-11-21 19:45:48,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:45:48" (3/3) ... [2023-11-21 19:45:48,068 INFO L112 eAbstractionObserver]: Analyzing ICFG CWE191_Integer_Underflow__int_fgets_postdec_32_bad.i [2023-11-21 19:45:48,088 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:45:48,089 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-21 19:45:48,147 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:45:48,154 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;@60db9453, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:45:48,154 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-21 19:45:48,159 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 8 states have (on average 1.375) internal successors, (11), 11 states have internal predecessors, (11), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 19:45:48,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-21 19:45:48,168 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:45:48,169 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:45:48,170 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-21 19:45:48,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:45:48,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1878054798, now seen corresponding path program 1 times [2023-11-21 19:45:48,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 19:45:48,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877443934] [2023-11-21 19:45:48,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:45:48,197 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 [2023-11-21 19:45:48,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 19:45:48,204 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5/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) [2023-11-21 19:45:48,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5/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 [2023-11-21 19:45:48,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 19:45:48,445 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 19:45:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 19:45:48,577 INFO L130 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2023-11-21 19:45:48,579 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 19:45:48,581 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 2 remaining) [2023-11-21 19:45:48,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 2 remaining) [2023-11-21 19:45:48,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5/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 [2023-11-21 19:45:48,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5/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 [2023-11-21 19:45:48,793 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-21 19:45:48,797 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-21 19:45:48,824 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post100 could not be translated [2023-11-21 19:45:48,832 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 07:45:48 BoogieIcfgContainer [2023-11-21 19:45:48,833 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-21 19:45:48,833 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-21 19:45:48,833 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-21 19:45:48,834 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-21 19:45:48,834 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:45:48" (3/4) ... [2023-11-21 19:45:48,836 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-21 19:45:48,837 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-21 19:45:48,839 INFO L158 Benchmark]: Toolchain (without parser) took 3206.13ms. Allocated memory was 79.7MB in the beginning and 98.6MB in the end (delta: 18.9MB). Free memory was 51.9MB in the beginning and 39.6MB in the end (delta: 12.3MB). Peak memory consumption was 32.2MB. Max. memory is 16.1GB. [2023-11-21 19:45:48,839 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 79.7MB. Free memory is still 55.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 19:45:48,840 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1562.72ms. Allocated memory was 79.7MB in the beginning and 98.6MB in the end (delta: 18.9MB). Free memory was 51.7MB in the beginning and 54.4MB in the end (delta: -2.7MB). Peak memory consumption was 32.5MB. Max. memory is 16.1GB. [2023-11-21 19:45:48,841 INFO L158 Benchmark]: Boogie Procedure Inliner took 94.61ms. Allocated memory is still 98.6MB. Free memory was 54.4MB in the beginning and 51.6MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-21 19:45:48,841 INFO L158 Benchmark]: Boogie Preprocessor took 70.13ms. Allocated memory is still 98.6MB. Free memory was 51.1MB in the beginning and 49.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-21 19:45:48,842 INFO L158 Benchmark]: RCFGBuilder took 691.38ms. Allocated memory is still 98.6MB. Free memory was 49.0MB in the beginning and 59.7MB in the end (delta: -10.7MB). Peak memory consumption was 14.4MB. Max. memory is 16.1GB. [2023-11-21 19:45:48,843 INFO L158 Benchmark]: TraceAbstraction took 773.43ms. Allocated memory is still 98.6MB. Free memory was 59.1MB in the beginning and 40.2MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-11-21 19:45:48,843 INFO L158 Benchmark]: Witness Printer took 4.35ms. Allocated memory is still 98.6MB. Free memory was 40.2MB in the beginning and 39.6MB in the end (delta: 548.0kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 19:45:48,847 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 79.7MB. Free memory is still 55.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1562.72ms. Allocated memory was 79.7MB in the beginning and 98.6MB in the end (delta: 18.9MB). Free memory was 51.7MB in the beginning and 54.4MB in the end (delta: -2.7MB). Peak memory consumption was 32.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 94.61ms. Allocated memory is still 98.6MB. Free memory was 54.4MB in the beginning and 51.6MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 70.13ms. Allocated memory is still 98.6MB. Free memory was 51.1MB in the beginning and 49.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 691.38ms. Allocated memory is still 98.6MB. Free memory was 49.0MB in the beginning and 59.7MB in the end (delta: -10.7MB). Peak memory consumption was 14.4MB. Max. memory is 16.1GB. * TraceAbstraction took 773.43ms. Allocated memory is still 98.6MB. Free memory was 59.1MB in the beginning and 40.2MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Witness Printer took 4.35ms. Allocated memory is still 98.6MB. Free memory was 40.2MB in the beginning and 39.6MB in the end (delta: 548.0kB). 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~post100 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: 1572]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: overapproximation of atoi at line 1560. Possible FailurePath: [L1522] const int GLOBAL_CONST_TRUE = 1; [L1523] const int GLOBAL_CONST_FALSE = 0; [L1524] const int GLOBAL_CONST_FIVE = 5; [L1525] int globalTrue = 1; [L1526] int globalFalse = 0; [L1527] int globalFive = 5; [L1546] int globalArgc = 0; [L1547] char** globalArgv = ((void *)0); [L1581] CALL printLine("Calling bad()...") VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1, line={4:0}] [L1414] COND TRUE line != ((void *)0) [L1581] 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] [L1582] CALL CWE191_Integer_Underflow__int_fgets_postdec_32_bad() [L1550] int data; [L1551] int *dataPtr1 = &data; [L1552] int *dataPtr2 = &data; [L1553] data = 0 [L1555] EXPR \read(*dataPtr1) [L1555] int data = *dataPtr1; [L1557] char inputBuffer[(3 * sizeof(data) + 2)] = ""; [L1558] COND TRUE, EXPR fgets(inputBuffer, (3 * sizeof(data) + 2), stdin) != ((void *)0) [L1560] EXPR data = atoi(inputBuffer) [L1557] char inputBuffer[(3 * sizeof(data) + 2)] = ""; [L1556-L1566] { char inputBuffer[(3 * sizeof(data) + 2)] = ""; if (fgets(inputBuffer, (3 * sizeof(data) + 2), stdin) != ((void *)0)) { data = atoi(inputBuffer); } else { printLine("fgets() failed."); } } [L1567] EXPR *dataPtr1 = data [L1554-L1568] { int data = *dataPtr1; { char inputBuffer[(3 * sizeof(data) + 2)] = ""; if (fgets(inputBuffer, (3 * sizeof(data) + 2), stdin) != ((void *)0)) { data = atoi(inputBuffer); } else { printLine("fgets() failed."); } } *dataPtr1 = data; } [L1570] EXPR \read(*dataPtr2) [L1570] int data = *dataPtr2; [L1572] data-- VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, data=-2147483648, data={6:0}, dataPtr1={6:0}, dataPtr2={6:0}, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] - UnprovableResult [Line: 1572]: 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, 15 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 8 NumberOfCodeBlocks, 8 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-11-21 19:45:48,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cf07c02-458c-4916-aaeb-0872230c7ec1/bin/utaipan-verify-QoSU8krkJ5/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