./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrncat_unsafe.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2c46a0e-9538-4847-88a4-cd8fe9bde88c/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2c46a0e-9538-4847-88a4-cd8fe9bde88c/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2c46a0e-9538-4847-88a4-cd8fe9bde88c/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2c46a0e-9538-4847-88a4-cd8fe9bde88c/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrncat_unsafe.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2c46a0e-9538-4847-88a4-cd8fe9bde88c/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2c46a0e-9538-4847-88a4-cd8fe9bde88c/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c2374f3fa60393b4239ba01cfdc738061c6be504efc61284895c5c63f0df9bcb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:04:33,000 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:04:33,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:04:33,073 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:04:33,074 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:04:33,079 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:04:33,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:04:33,087 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:04:33,089 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:04:33,090 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:04:33,092 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:04:33,093 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:04:33,094 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:04:33,095 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:04:33,097 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:04:33,099 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:04:33,101 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:04:33,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:04:33,106 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:04:33,116 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:04:33,119 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:04:33,121 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:04:33,128 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:04:33,129 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:04:33,140 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:04:33,141 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:04:33,141 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:04:33,143 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:04:33,144 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:04:33,146 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:04:33,146 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:04:33,148 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:04:33,150 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:04:33,151 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:04:33,153 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:04:33,154 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:04:33,154 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:04:33,155 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:04:33,155 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:04:33,156 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:04:33,157 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:04:33,158 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2c46a0e-9538-4847-88a4-cd8fe9bde88c/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 03:04:33,209 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:04:33,209 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:04:33,210 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:04:33,210 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:04:33,211 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:04:33,211 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:04:33,211 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:04:33,212 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:04:33,216 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:04:33,216 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:04:33,216 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:04:33,217 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:04:33,217 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:04:33,217 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:04:33,217 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:04:33,218 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:04:33,218 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:04:33,218 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:04:33,219 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 03:04:33,219 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 03:04:33,219 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:04:33,220 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:04:33,220 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 03:04:33,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:04:33,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:04:33,221 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:04:33,221 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 03:04:33,221 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 03:04:33,221 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 03:04:33,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:04:33,222 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 03:04:33,222 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:04:33,222 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:04:33,222 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:04:33,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:04:33,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:04:33,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:04:33,223 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:04:33,224 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:04:33,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:04:33,224 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:04:33,224 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:04:33,224 INFO L138 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_a2c46a0e-9538-4847-88a4-cd8fe9bde88c/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2c46a0e-9538-4847-88a4-cd8fe9bde88c/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2374f3fa60393b4239ba01cfdc738061c6be504efc61284895c5c63f0df9bcb [2021-11-23 03:04:33,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:04:33,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:04:33,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:04:33,611 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:04:33,612 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:04:33,615 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2c46a0e-9538-4847-88a4-cd8fe9bde88c/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-memsafety/cstrncat_unsafe.c [2021-11-23 03:04:33,721 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2c46a0e-9538-4847-88a4-cd8fe9bde88c/bin/utaipan-EQgc7hIp5V/data/0e69dbfbc/bfee8a876538464bb8d45148de850c47/FLAG593a16eb3 [2021-11-23 03:04:34,354 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:04:34,355 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2c46a0e-9538-4847-88a4-cd8fe9bde88c/sv-benchmarks/c/array-memsafety/cstrncat_unsafe.c [2021-11-23 03:04:34,369 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2c46a0e-9538-4847-88a4-cd8fe9bde88c/bin/utaipan-EQgc7hIp5V/data/0e69dbfbc/bfee8a876538464bb8d45148de850c47/FLAG593a16eb3 [2021-11-23 03:04:34,719 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2c46a0e-9538-4847-88a4-cd8fe9bde88c/bin/utaipan-EQgc7hIp5V/data/0e69dbfbc/bfee8a876538464bb8d45148de850c47 [2021-11-23 03:04:34,722 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:04:34,724 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:04:34,728 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:04:34,729 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:04:34,733 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:04:34,734 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:04:34" (1/1) ... [2021-11-23 03:04:34,736 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4905ea5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:34, skipping insertion in model container [2021-11-23 03:04:34,736 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:04:34" (1/1) ... [2021-11-23 03:04:34,746 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:04:34,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:04:35,048 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:04:35,062 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:04:35,086 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:04:35,101 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:04:35,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:35 WrapperNode [2021-11-23 03:04:35,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:04:35,104 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:04:35,105 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:04:35,105 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:04:35,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:35" (1/1) ... [2021-11-23 03:04:35,124 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:35" (1/1) ... [2021-11-23 03:04:35,156 INFO L137 Inliner]: procedures = 8, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2021-11-23 03:04:35,157 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:04:35,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:04:35,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:04:35,159 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:04:35,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:35" (1/1) ... [2021-11-23 03:04:35,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:35" (1/1) ... [2021-11-23 03:04:35,184 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:35" (1/1) ... [2021-11-23 03:04:35,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:35" (1/1) ... [2021-11-23 03:04:35,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:35" (1/1) ... [2021-11-23 03:04:35,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:35" (1/1) ... [2021-11-23 03:04:35,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:35" (1/1) ... [2021-11-23 03:04:35,212 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:04:35,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:04:35,216 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:04:35,216 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:04:35,217 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:35" (1/1) ... [2021-11-23 03:04:35,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:04:35,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2c46a0e-9538-4847-88a4-cd8fe9bde88c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:04:35,254 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2c46a0e-9538-4847-88a4-cd8fe9bde88c/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:04:35,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2c46a0e-9538-4847-88a4-cd8fe9bde88c/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:04:35,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:04:35,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:04:35,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:04:35,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:04:35,404 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:04:35,405 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:04:35,571 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:04:35,588 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:04:35,588 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 03:04:35,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:04:35 BoogieIcfgContainer [2021-11-23 03:04:35,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:04:35,593 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:04:35,593 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:04:35,599 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:04:35,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:04:34" (1/3) ... [2021-11-23 03:04:35,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@246631f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:04:35, skipping insertion in model container [2021-11-23 03:04:35,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:35" (2/3) ... [2021-11-23 03:04:35,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@246631f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:04:35, skipping insertion in model container [2021-11-23 03:04:35,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:04:35" (3/3) ... [2021-11-23 03:04:35,603 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrncat_unsafe.c [2021-11-23 03:04:35,609 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:04:35,609 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-11-23 03:04:35,677 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:04:35,689 INFO L339 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:04:35,689 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-11-23 03:04:35,711 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:04:35,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-11-23 03:04:35,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:04:35,729 INFO L514 BasicCegarLoop]: trace histogram [1, 1] [2021-11-23 03:04:35,729 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 03:04:35,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:04:35,736 INFO L85 PathProgramCache]: Analyzing trace with hash 2891, now seen corresponding path program 1 times [2021-11-23 03:04:35,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:04:35,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518886139] [2021-11-23 03:04:35,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:04:35,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:04:35,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 03:04:35,855 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 03:04:35,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 03:04:35,916 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-23 03:04:35,919 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 03:04:35,921 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION (10 of 11 remaining) [2021-11-23 03:04:35,923 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (9 of 11 remaining) [2021-11-23 03:04:35,924 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (8 of 11 remaining) [2021-11-23 03:04:35,925 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (7 of 11 remaining) [2021-11-23 03:04:35,925 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (6 of 11 remaining) [2021-11-23 03:04:35,925 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (5 of 11 remaining) [2021-11-23 03:04:35,926 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (4 of 11 remaining) [2021-11-23 03:04:35,928 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (3 of 11 remaining) [2021-11-23 03:04:35,929 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION (2 of 11 remaining) [2021-11-23 03:04:35,929 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION (1 of 11 remaining) [2021-11-23 03:04:35,930 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 11 remaining) [2021-11-23 03:04:35,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:04:35,937 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-23 03:04:35,942 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 03:04:35,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:04:35 BoogieIcfgContainer [2021-11-23 03:04:35,971 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 03:04:35,975 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 03:04:35,975 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 03:04:35,975 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 03:04:35,976 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:04:35" (3/4) ... [2021-11-23 03:04:35,978 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-23 03:04:36,036 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2c46a0e-9538-4847-88a4-cd8fe9bde88c/bin/utaipan-EQgc7hIp5V/witness.graphml [2021-11-23 03:04:36,036 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 03:04:36,041 INFO L158 Benchmark]: Toolchain (without parser) took 1313.08ms. Allocated memory is still 125.8MB. Free memory was 92.9MB in the beginning and 73.0MB in the end (delta: 19.9MB). Peak memory consumption was 18.2MB. Max. memory is 16.1GB. [2021-11-23 03:04:36,045 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 92.3MB. Free memory was 48.5MB in the beginning and 48.4MB in the end (delta: 43.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:04:36,045 INFO L158 Benchmark]: CACSL2BoogieTranslator took 374.97ms. Allocated memory is still 125.8MB. Free memory was 92.6MB in the beginning and 102.1MB in the end (delta: -9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 03:04:36,046 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.92ms. Allocated memory is still 125.8MB. Free memory was 102.1MB in the beginning and 100.6MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:04:36,047 INFO L158 Benchmark]: Boogie Preprocessor took 55.97ms. Allocated memory is still 125.8MB. Free memory was 100.6MB in the beginning and 99.4MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:04:36,049 INFO L158 Benchmark]: RCFGBuilder took 375.93ms. Allocated memory is still 125.8MB. Free memory was 99.4MB in the beginning and 88.1MB in the end (delta: 11.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-23 03:04:36,049 INFO L158 Benchmark]: TraceAbstraction took 378.41ms. Allocated memory is still 125.8MB. Free memory was 87.4MB in the beginning and 74.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 03:04:36,050 INFO L158 Benchmark]: Witness Printer took 61.17ms. Allocated memory is still 125.8MB. Free memory was 74.8MB in the beginning and 73.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:04:36,059 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 92.3MB. Free memory was 48.5MB in the beginning and 48.4MB in the end (delta: 43.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 374.97ms. Allocated memory is still 125.8MB. Free memory was 92.6MB in the beginning and 102.1MB in the end (delta: -9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 52.92ms. Allocated memory is still 125.8MB. Free memory was 102.1MB in the beginning and 100.6MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 55.97ms. Allocated memory is still 125.8MB. Free memory was 100.6MB in the beginning and 99.4MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 375.93ms. Allocated memory is still 125.8MB. Free memory was 99.4MB in the beginning and 88.1MB in the end (delta: 11.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 378.41ms. Allocated memory is still 125.8MB. Free memory was 87.4MB in the beginning and 74.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 61.17ms. Allocated memory is still 125.8MB. Free memory was 74.8MB in the beginning and 73.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 7]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L24] char *s1; [L25] char *s2; [L26] int n = __VERIFIER_nondet_int(); [L27] CALL cstrncat(s1, s2, n) [L5] char *s = s1; VAL [\old(n)=-1, n=-1, s={3:6}, s1={3:6}, s1={3:6}, s2={5:4}, s2={5:4}] [L7] \read(*s) - UnprovableResult [Line: 7]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 18]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 18]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 23]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 2 NumberOfCodeBlocks, 2 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 proved your program to be incorrect! [2021-11-23 03:04:36,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2c46a0e-9538-4847-88a4-cd8fe9bde88c/bin/utaipan-EQgc7hIp5V/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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)