./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 a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_5d2accf7-10f7-4a9c-8860-622937ad264c/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_5d2accf7-10f7-4a9c-8860-622937ad264c/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5d2accf7-10f7-4a9c-8860-622937ad264c/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5d2accf7-10f7-4a9c-8860-622937ad264c/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrncat_unsafe.c -s /tmp/vcloud-vcloud-master/worker/run_dir_5d2accf7-10f7-4a9c-8860-622937ad264c/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5d2accf7-10f7-4a9c-8860-622937ad264c/bin/uautomizer --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 25bb35238109f4fc42bc09877cec45401fedd3ae ....................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 20:51:41,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 20:51:41,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 20:51:42,102 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 20:51:42,103 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 20:51:42,105 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 20:51:42,107 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 20:51:42,110 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 20:51:42,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 20:51:42,114 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 20:51:42,116 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 20:51:42,118 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 20:51:42,119 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 20:51:42,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 20:51:42,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 20:51:42,125 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 20:51:42,126 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 20:51:42,131 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 20:51:42,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 20:51:42,137 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 20:51:42,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 20:51:42,145 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 20:51:42,148 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 20:51:42,150 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 20:51:42,170 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 20:51:42,171 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 20:51:42,172 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 20:51:42,173 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 20:51:42,176 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 20:51:42,177 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 20:51:42,178 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 20:51:42,180 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 20:51:42,182 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 20:51:42,184 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 20:51:42,186 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 20:51:42,186 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 20:51:42,187 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 20:51:42,187 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 20:51:42,188 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 20:51:42,189 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 20:51:42,190 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 20:51:42,193 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5d2accf7-10f7-4a9c-8860-622937ad264c/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-29 20:51:42,240 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 20:51:42,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 20:51:42,244 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 20:51:42,244 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 20:51:42,244 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 20:51:42,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 20:51:42,245 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 20:51:42,246 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 20:51:42,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 20:51:42,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 20:51:42,248 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 20:51:42,248 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-29 20:51:42,249 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-29 20:51:42,249 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-29 20:51:42,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 20:51:42,250 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-29 20:51:42,250 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 20:51:42,250 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 20:51:42,251 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 20:51:42,251 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 20:51:42,252 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 20:51:42,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 20:51:42,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 20:51:42,253 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 20:51:42,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 20:51:42,253 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 20:51:42,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 20:51:42,254 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 20:51:42,255 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_5d2accf7-10f7-4a9c-8860-622937ad264c/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_5d2accf7-10f7-4a9c-8860-622937ad264c/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25bb35238109f4fc42bc09877cec45401fedd3ae [2020-11-29 20:51:42,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 20:51:42,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 20:51:42,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 20:51:42,626 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 20:51:42,627 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 20:51:42,629 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5d2accf7-10f7-4a9c-8860-622937ad264c/bin/uautomizer/../../sv-benchmarks/c/array-memsafety/cstrncat_unsafe.c [2020-11-29 20:51:42,707 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5d2accf7-10f7-4a9c-8860-622937ad264c/bin/uautomizer/data/17e40d45b/5775c2f8cf4f492e8f910b3465fb70d0/FLAG313033c61 [2020-11-29 20:51:43,337 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 20:51:43,338 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5d2accf7-10f7-4a9c-8860-622937ad264c/sv-benchmarks/c/array-memsafety/cstrncat_unsafe.c [2020-11-29 20:51:43,344 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5d2accf7-10f7-4a9c-8860-622937ad264c/bin/uautomizer/data/17e40d45b/5775c2f8cf4f492e8f910b3465fb70d0/FLAG313033c61 [2020-11-29 20:51:43,723 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5d2accf7-10f7-4a9c-8860-622937ad264c/bin/uautomizer/data/17e40d45b/5775c2f8cf4f492e8f910b3465fb70d0 [2020-11-29 20:51:43,726 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 20:51:43,728 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-29 20:51:43,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 20:51:43,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 20:51:43,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 20:51:43,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:51:43" (1/1) ... [2020-11-29 20:51:43,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d160f1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:51:43, skipping insertion in model container [2020-11-29 20:51:43,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:51:43" (1/1) ... [2020-11-29 20:51:43,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 20:51:43,762 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 20:51:43,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:51:43,977 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 20:51:44,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:51:44,040 INFO L208 MainTranslator]: Completed translation [2020-11-29 20:51:44,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:51:44 WrapperNode [2020-11-29 20:51:44,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 20:51:44,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 20:51:44,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 20:51:44,044 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 20:51:44,058 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:51:44" (1/1) ... [2020-11-29 20:51:44,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:51:44" (1/1) ... [2020-11-29 20:51:44,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:51:44" (1/1) ... [2020-11-29 20:51:44,073 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:51:44" (1/1) ... [2020-11-29 20:51:44,091 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:51:44" (1/1) ... [2020-11-29 20:51:44,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:51:44" (1/1) ... [2020-11-29 20:51:44,107 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:51:44" (1/1) ... [2020-11-29 20:51:44,117 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 20:51:44,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 20:51:44,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 20:51:44,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 20:51:44,122 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:51:44" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d2accf7-10f7-4a9c-8860-622937ad264c/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 20:51:44,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-29 20:51:44,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 20:51:44,215 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrncat [2020-11-29 20:51:44,215 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-29 20:51:44,215 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-29 20:51:44,215 INFO L130 BoogieDeclarations]: Found specification of procedure cstrncat [2020-11-29 20:51:44,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 20:51:44,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 20:51:44,216 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-29 20:51:44,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-29 20:51:44,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 20:51:44,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 20:51:44,721 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 20:51:44,721 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-29 20:51:44,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:51:44 BoogieIcfgContainer [2020-11-29 20:51:44,724 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 20:51:44,725 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 20:51:44,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 20:51:44,730 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 20:51:44,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 08:51:43" (1/3) ... [2020-11-29 20:51:44,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f1bf6f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:51:44, skipping insertion in model container [2020-11-29 20:51:44,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:51:44" (2/3) ... [2020-11-29 20:51:44,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f1bf6f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:51:44, skipping insertion in model container [2020-11-29 20:51:44,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:51:44" (3/3) ... [2020-11-29 20:51:44,734 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrncat_unsafe.c [2020-11-29 20:51:44,747 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 20:51:44,752 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 11 error locations. [2020-11-29 20:51:44,767 INFO L253 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2020-11-29 20:51:44,793 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 20:51:44,794 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-29 20:51:44,794 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 20:51:44,794 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 20:51:44,794 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 20:51:44,795 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 20:51:44,795 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 20:51:44,795 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 20:51:44,813 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-11-29 20:51:44,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-29 20:51:44,828 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:51:44,829 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:51:44,829 INFO L429 AbstractCegarLoop]: === Iteration 1 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, cstrncatErr0REQUIRES_VIOLATION, cstrncatErr5REQUIRES_VIOLATION, cstrncatErr7REQUIRES_VIOLATION, cstrncatErr6REQUIRES_VIOLATION, cstrncatErr1REQUIRES_VIOLATION, cstrncatErr8REQUIRES_VIOLATION, cstrncatErr3REQUIRES_VIOLATION, cstrncatErr2REQUIRES_VIOLATION, cstrncatErr4REQUIRES_VIOLATION, cstrncatErr9REQUIRES_VIOLATION]=== [2020-11-29 20:51:44,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:51:44,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1122182536, now seen corresponding path program 1 times [2020-11-29 20:51:44,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:51:44,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612559524] [2020-11-29 20:51:44,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:51:45,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:51:45,020 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:51:45,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:51:45,048 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:51:45,081 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 20:51:45,082 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 20:51:45,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 20:51:45,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 08:51:45 BoogieIcfgContainer [2020-11-29 20:51:45,107 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 20:51:45,108 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 20:51:45,108 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 20:51:45,109 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 20:51:45,109 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:51:44" (3/4) ... [2020-11-29 20:51:45,112 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 20:51:45,157 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_5d2accf7-10f7-4a9c-8860-622937ad264c/bin/uautomizer/witness.graphml [2020-11-29 20:51:45,160 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 20:51:45,163 INFO L168 Benchmark]: Toolchain (without parser) took 1433.45 ms. Allocated memory was 90.2 MB in the beginning and 117.4 MB in the end (delta: 27.3 MB). Free memory was 60.9 MB in the beginning and 93.2 MB in the end (delta: -32.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:51:45,173 INFO L168 Benchmark]: CDTParser took 0.63 ms. Allocated memory is still 90.2 MB. Free memory is still 49.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:51:45,174 INFO L168 Benchmark]: CACSL2BoogieTranslator took 313.08 ms. Allocated memory is still 90.2 MB. Free memory was 60.6 MB in the beginning and 69.0 MB in the end (delta: -8.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 20:51:45,175 INFO L168 Benchmark]: Boogie Preprocessor took 75.03 ms. Allocated memory is still 90.2 MB. Free memory was 69.0 MB in the beginning and 67.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:51:45,177 INFO L168 Benchmark]: RCFGBuilder took 604.21 ms. Allocated memory is still 90.2 MB. Free memory was 67.6 MB in the beginning and 52.2 MB in the end (delta: 15.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-29 20:51:45,178 INFO L168 Benchmark]: TraceAbstraction took 381.80 ms. Allocated memory was 90.2 MB in the beginning and 117.4 MB in the end (delta: 27.3 MB). Free memory was 51.8 MB in the beginning and 95.3 MB in the end (delta: -43.5 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. [2020-11-29 20:51:45,179 INFO L168 Benchmark]: Witness Printer took 52.02 ms. Allocated memory is still 117.4 MB. Free memory was 94.8 MB in the beginning and 93.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 20:51:45,183 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.63 ms. Allocated memory is still 90.2 MB. Free memory is still 49.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 313.08 ms. Allocated memory is still 90.2 MB. Free memory was 60.6 MB in the beginning and 69.0 MB in the end (delta: -8.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 75.03 ms. Allocated memory is still 90.2 MB. Free memory was 69.0 MB in the beginning and 67.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 604.21 ms. Allocated memory is still 90.2 MB. Free memory was 67.6 MB in the beginning and 52.2 MB in the end (delta: 15.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 381.80 ms. Allocated memory was 90.2 MB in the beginning and 117.4 MB in the end (delta: 27.3 MB). Free memory was 51.8 MB in the beginning and 95.3 MB in the end (delta: -43.5 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. * Witness Printer took 52.02 ms. Allocated memory is still 117.4 MB. Free memory was 94.8 MB in the beginning and 93.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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) VAL [\old(n)=0, s1={4:5}, s2={7:2}] [L5] char *s = s1; VAL [\old(n)=0, n=0, s={4:5}, s1={4:5}, s1={4:5}, s2={7:2}, s2={7:2}] [L7] \read(*s) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 38 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=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, 9 NumberOfCodeBlocks, 9 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! Received shutdown request...