./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 678e0110 Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_afea4a91-5896-44d7-a522-ac8375aa2784/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_afea4a91-5896-44d7-a522-ac8375aa2784/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_afea4a91-5896-44d7-a522-ac8375aa2784/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_afea4a91-5896-44d7-a522-ac8375aa2784/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrncat_unsafe.c -s /tmp/vcloud-vcloud-master/worker/run_dir_afea4a91-5896-44d7-a522-ac8375aa2784/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_afea4a91-5896-44d7-a522-ac8375aa2784/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 --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-678e011 [2019-11-20 04:27:29,276 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 04:27:29,278 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 04:27:29,294 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 04:27:29,294 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 04:27:29,295 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 04:27:29,297 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 04:27:29,309 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 04:27:29,311 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 04:27:29,312 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 04:27:29,313 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 04:27:29,314 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 04:27:29,314 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 04:27:29,315 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 04:27:29,316 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 04:27:29,317 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 04:27:29,318 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 04:27:29,319 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 04:27:29,320 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 04:27:29,322 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 04:27:29,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 04:27:29,325 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 04:27:29,326 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 04:27:29,326 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 04:27:29,329 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 04:27:29,329 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 04:27:29,329 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 04:27:29,331 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 04:27:29,331 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 04:27:29,332 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 04:27:29,332 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 04:27:29,333 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 04:27:29,333 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 04:27:29,334 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 04:27:29,335 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 04:27:29,335 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 04:27:29,335 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 04:27:29,335 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 04:27:29,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 04:27:29,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 04:27:29,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 04:27:29,337 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_afea4a91-5896-44d7-a522-ac8375aa2784/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-20 04:27:29,357 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 04:27:29,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 04:27:29,359 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 04:27:29,359 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 04:27:29,359 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 04:27:29,359 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 04:27:29,359 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 04:27:29,360 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 04:27:29,360 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 04:27:29,360 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 04:27:29,361 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 04:27:29,361 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 04:27:29,361 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 04:27:29,361 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-20 04:27:29,361 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 04:27:29,362 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 04:27:29,362 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 04:27:29,362 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 04:27:29,362 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 04:27:29,362 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 04:27:29,363 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 04:27:29,363 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 04:27:29,363 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 04:27:29,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 04:27:29,363 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 04:27:29,364 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 04:27:29,364 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 04:27:29,364 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 04:27:29,364 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 04:27:29,364 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_afea4a91-5896-44d7-a522-ac8375aa2784/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 [2019-11-20 04:27:29,501 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 04:27:29,511 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 04:27:29,514 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 04:27:29,515 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 04:27:29,516 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 04:27:29,516 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_afea4a91-5896-44d7-a522-ac8375aa2784/bin/uautomizer/../../sv-benchmarks/c/array-memsafety/cstrncat_unsafe.c [2019-11-20 04:27:29,590 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_afea4a91-5896-44d7-a522-ac8375aa2784/bin/uautomizer/data/474c6ab24/84f85c798aed4954b64d31c3e972aa7b/FLAGc80e16226 [2019-11-20 04:27:29,909 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 04:27:29,909 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_afea4a91-5896-44d7-a522-ac8375aa2784/sv-benchmarks/c/array-memsafety/cstrncat_unsafe.c [2019-11-20 04:27:29,914 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_afea4a91-5896-44d7-a522-ac8375aa2784/bin/uautomizer/data/474c6ab24/84f85c798aed4954b64d31c3e972aa7b/FLAGc80e16226 [2019-11-20 04:27:30,327 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_afea4a91-5896-44d7-a522-ac8375aa2784/bin/uautomizer/data/474c6ab24/84f85c798aed4954b64d31c3e972aa7b [2019-11-20 04:27:30,329 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 04:27:30,331 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 04:27:30,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 04:27:30,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 04:27:30,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 04:27:30,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 04:27:30" (1/1) ... [2019-11-20 04:27:30,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19793048 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:27:30, skipping insertion in model container [2019-11-20 04:27:30,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 04:27:30" (1/1) ... [2019-11-20 04:27:30,347 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 04:27:30,364 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 04:27:30,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 04:27:30,591 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 04:27:30,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 04:27:30,673 INFO L192 MainTranslator]: Completed translation [2019-11-20 04:27:30,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:27:30 WrapperNode [2019-11-20 04:27:30,674 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 04:27:30,675 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 04:27:30,675 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 04:27:30,675 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 04:27:30,683 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:27:30" (1/1) ... [2019-11-20 04:27:30,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:27:30" (1/1) ... [2019-11-20 04:27:30,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:27:30" (1/1) ... [2019-11-20 04:27:30,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:27:30" (1/1) ... [2019-11-20 04:27:30,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:27:30" (1/1) ... [2019-11-20 04:27:30,703 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:27:30" (1/1) ... [2019-11-20 04:27:30,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:27:30" (1/1) ... [2019-11-20 04:27:30,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 04:27:30,707 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 04:27:30,707 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 04:27:30,708 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 04:27:30,708 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:27:30" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_afea4a91-5896-44d7-a522-ac8375aa2784/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 [2019-11-20 04:27:30,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 04:27:30,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 04:27:30,751 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrncat [2019-11-20 04:27:30,751 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 04:27:30,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-20 04:27:30,752 INFO L130 BoogieDeclarations]: Found specification of procedure cstrncat [2019-11-20 04:27:30,752 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2019-11-20 04:27:30,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2019-11-20 04:27:30,752 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 04:27:30,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 04:27:30,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 04:27:30,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 04:27:31,049 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 04:27:31,050 INFO L285 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-20 04:27:31,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:27:31 BoogieIcfgContainer [2019-11-20 04:27:31,051 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 04:27:31,052 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 04:27:31,052 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 04:27:31,055 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 04:27:31,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 04:27:30" (1/3) ... [2019-11-20 04:27:31,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27b1985d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 04:27:31, skipping insertion in model container [2019-11-20 04:27:31,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:27:30" (2/3) ... [2019-11-20 04:27:31,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27b1985d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 04:27:31, skipping insertion in model container [2019-11-20 04:27:31,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:27:31" (3/3) ... [2019-11-20 04:27:31,058 INFO L109 eAbstractionObserver]: Analyzing ICFG cstrncat_unsafe.c [2019-11-20 04:27:31,065 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 04:27:31,069 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 11 error locations. [2019-11-20 04:27:31,078 INFO L249 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2019-11-20 04:27:31,095 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 04:27:31,095 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 04:27:31,096 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 04:27:31,096 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 04:27:31,096 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 04:27:31,096 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 04:27:31,096 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 04:27:31,096 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 04:27:31,110 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2019-11-20 04:27:31,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 04:27:31,118 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:27:31,119 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:27:31,119 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]=== [2019-11-20 04:27:31,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:27:31,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1122182536, now seen corresponding path program 1 times [2019-11-20 04:27:31,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:27:31,135 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1959478790] [2019-11-20 04:27:31,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_afea4a91-5896-44d7-a522-ac8375aa2784/bin/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:27:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:27:31,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:27:31,299 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-20 04:27:31,300 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-20 04:27:31,501 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:27:31,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 04:27:31 BoogieIcfgContainer [2019-11-20 04:27:31,518 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 04:27:31,518 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 04:27:31,519 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 04:27:31,519 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 04:27:31,519 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:27:31" (3/4) ... [2019-11-20 04:27:31,521 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-20 04:27:31,553 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_afea4a91-5896-44d7-a522-ac8375aa2784/bin/uautomizer/witness.graphml [2019-11-20 04:27:31,553 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 04:27:31,555 INFO L168 Benchmark]: Toolchain (without parser) took 1223.54 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 150.5 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -149.1 MB). Peak memory consumption was 1.4 MB. Max. memory is 11.5 GB. [2019-11-20 04:27:31,555 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 04:27:31,556 INFO L168 Benchmark]: CACSL2BoogieTranslator took 342.36 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 150.5 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -197.3 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. [2019-11-20 04:27:31,556 INFO L168 Benchmark]: Boogie Preprocessor took 32.48 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 04:27:31,557 INFO L168 Benchmark]: RCFGBuilder took 343.72 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.7 MB). Peak memory consumption was 22.7 MB. Max. memory is 11.5 GB. [2019-11-20 04:27:31,557 INFO L168 Benchmark]: TraceAbstraction took 466.28 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 11.5 GB. [2019-11-20 04:27:31,558 INFO L168 Benchmark]: Witness Printer took 34.49 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 04:27:31,560 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 342.36 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 150.5 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -197.3 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 32.48 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 343.72 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.7 MB). Peak memory consumption was 22.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 466.28 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 11.5 GB. * Witness Printer took 34.49 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 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={0:0}, s2={0:0}] [L5] char *s = s1; VAL [\old(n)=0, n=0, s={0:0}, s1={0:0}, s1={0:0}, s2={0:0}, s2={0:0}] [L7] \read(*s) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 38 locations, 11 error locations. Result: UNSAFE, OverallTime: 0.4s, 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...