./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 f470102c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/cstrncat_unsafe.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 0.1.25-f470102 [2019-11-28 20:04:10,130 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 20:04:10,133 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 20:04:10,152 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 20:04:10,153 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 20:04:10,155 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 20:04:10,156 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 20:04:10,166 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 20:04:10,171 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 20:04:10,175 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 20:04:10,176 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 20:04:10,178 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 20:04:10,178 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 20:04:10,181 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 20:04:10,182 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 20:04:10,184 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 20:04:10,186 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 20:04:10,187 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 20:04:10,189 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 20:04:10,193 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 20:04:10,197 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 20:04:10,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 20:04:10,202 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 20:04:10,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 20:04:10,207 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 20:04:10,207 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 20:04:10,208 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 20:04:10,209 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 20:04:10,210 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 20:04:10,210 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 20:04:10,211 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 20:04:10,211 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 20:04:10,212 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 20:04:10,213 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 20:04:10,214 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 20:04:10,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 20:04:10,216 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 20:04:10,216 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 20:04:10,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 20:04:10,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 20:04:10,218 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 20:04:10,220 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2019-11-28 20:04:10,256 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 20:04:10,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 20:04:10,262 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 20:04:10,262 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 20:04:10,262 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 20:04:10,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 20:04:10,263 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 20:04:10,263 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-28 20:04:10,264 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 20:04:10,266 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 20:04:10,266 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 20:04:10,266 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-28 20:04:10,267 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-28 20:04:10,267 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-28 20:04:10,267 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 20:04:10,267 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-28 20:04:10,269 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 20:04:10,269 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 20:04:10,269 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 20:04:10,269 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 20:04:10,270 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 20:04:10,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 20:04:10,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 20:04:10,271 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 20:04:10,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 20:04:10,272 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 20:04:10,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 20:04:10,272 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 20:04:10,273 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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 [2019-11-28 20:04:10,640 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 20:04:10,661 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 20:04:10,666 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 20:04:10,669 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 20:04:10,670 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 20:04:10,672 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrncat_unsafe.c [2019-11-28 20:04:10,750 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/795780ce6/eead007babef45a7a3c61c678cb5def6/FLAGeaba66141 [2019-11-28 20:04:11,190 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 20:04:11,191 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrncat_unsafe.c [2019-11-28 20:04:11,198 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/795780ce6/eead007babef45a7a3c61c678cb5def6/FLAGeaba66141 [2019-11-28 20:04:11,589 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/795780ce6/eead007babef45a7a3c61c678cb5def6 [2019-11-28 20:04:11,594 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 20:04:11,596 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-28 20:04:11,601 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 20:04:11,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 20:04:11,605 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 20:04:11,606 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:04:11" (1/1) ... [2019-11-28 20:04:11,608 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2727f677 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:04:11, skipping insertion in model container [2019-11-28 20:04:11,609 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:04:11" (1/1) ... [2019-11-28 20:04:11,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 20:04:11,634 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 20:04:11,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 20:04:11,900 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 20:04:11,922 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 20:04:11,940 INFO L208 MainTranslator]: Completed translation [2019-11-28 20:04:11,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:04:11 WrapperNode [2019-11-28 20:04:11,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 20:04:11,942 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 20:04:11,942 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 20:04:11,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 20:04:12,017 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:04:11" (1/1) ... [2019-11-28 20:04:12,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:04:11" (1/1) ... [2019-11-28 20:04:12,030 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:04:11" (1/1) ... [2019-11-28 20:04:12,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:04:11" (1/1) ... [2019-11-28 20:04:12,042 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:04:11" (1/1) ... [2019-11-28 20:04:12,051 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:04:11" (1/1) ... [2019-11-28 20:04:12,058 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:04:11" (1/1) ... [2019-11-28 20:04:12,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 20:04:12,066 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 20:04:12,067 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 20:04:12,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 20:04:12,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:04:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 20:04:12,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-28 20:04:12,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 20:04:12,127 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrncat [2019-11-28 20:04:12,128 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-28 20:04:12,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-28 20:04:12,128 INFO L130 BoogieDeclarations]: Found specification of procedure cstrncat [2019-11-28 20:04:12,128 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-28 20:04:12,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-28 20:04:12,129 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-28 20:04:12,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-28 20:04:12,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 20:04:12,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-28 20:04:12,466 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 20:04:12,466 INFO L287 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-28 20:04:12,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:04:12 BoogieIcfgContainer [2019-11-28 20:04:12,467 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 20:04:12,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 20:04:12,468 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 20:04:12,472 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 20:04:12,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:04:11" (1/3) ... [2019-11-28 20:04:12,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5770579e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:04:12, skipping insertion in model container [2019-11-28 20:04:12,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:04:11" (2/3) ... [2019-11-28 20:04:12,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5770579e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:04:12, skipping insertion in model container [2019-11-28 20:04:12,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:04:12" (3/3) ... [2019-11-28 20:04:12,476 INFO L109 eAbstractionObserver]: Analyzing ICFG cstrncat_unsafe.c [2019-11-28 20:04:12,485 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 20:04:12,492 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 11 error locations. [2019-11-28 20:04:12,505 INFO L249 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2019-11-28 20:04:12,524 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 20:04:12,525 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-28 20:04:12,525 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 20:04:12,525 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 20:04:12,525 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 20:04:12,526 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 20:04:12,526 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 20:04:12,526 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 20:04:12,543 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2019-11-28 20:04:12,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-28 20:04:12,552 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:04:12,553 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:04:12,553 INFO L410 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]=== [2019-11-28 20:04:12,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:04:12,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1122182536, now seen corresponding path program 1 times [2019-11-28 20:04:12,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:04:12,569 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821429225] [2019-11-28 20:04:12,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:04:12,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:04:12,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:04:12,699 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:04:12,700 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 20:04:12,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 08:04:12 BoogieIcfgContainer [2019-11-28 20:04:12,723 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 20:04:12,724 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 20:04:12,724 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 20:04:12,724 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 20:04:12,725 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:04:12" (3/4) ... [2019-11-28 20:04:12,728 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 20:04:12,774 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 20:04:12,774 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 20:04:12,777 INFO L168 Benchmark]: Toolchain (without parser) took 1180.56 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 82.3 MB). Free memory was 957.7 MB in the beginning and 1.0 GB in the end (delta: -74.8 MB). Peak memory consumption was 7.5 MB. Max. memory is 11.5 GB. [2019-11-28 20:04:12,778 INFO L168 Benchmark]: CDTParser took 0.43 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 20:04:12,779 INFO L168 Benchmark]: CACSL2BoogieTranslator took 340.56 ms. Allocated memory is still 1.0 GB. Free memory was 957.7 MB in the beginning and 946.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 20:04:12,780 INFO L168 Benchmark]: Boogie Preprocessor took 124.16 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 82.3 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -124.5 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. [2019-11-28 20:04:12,781 INFO L168 Benchmark]: RCFGBuilder took 401.07 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 11.5 GB. [2019-11-28 20:04:12,782 INFO L168 Benchmark]: TraceAbstraction took 255.18 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 11.5 GB. [2019-11-28 20:04:12,783 INFO L168 Benchmark]: Witness Printer took 50.38 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 20:04:12,787 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 340.56 ms. Allocated memory is still 1.0 GB. Free memory was 957.7 MB in the beginning and 946.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 124.16 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 82.3 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -124.5 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 401.07 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 255.18 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 11.5 GB. * Witness Printer took 50.38 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 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={6:5}, s2={7:2}] [L5] char *s = s1; VAL [\old(n)=0, n=0, s={6:5}, s1={6:5}, s1={6:5}, s2={7:2}, s2={7:2}] [L7] \read(*s) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 38 locations, 11 error locations. Result: UNSAFE, OverallTime: 0.1s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 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, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...