./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 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9a87f-2408-4a09-94ff-17db12922f54/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9a87f-2408-4a09-94ff-17db12922f54/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9a87f-2408-4a09-94ff-17db12922f54/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9a87f-2408-4a09-94ff-17db12922f54/bin/utaipan-WLngWcDbfI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrncat_unsafe.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9a87f-2408-4a09-94ff-17db12922f54/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9a87f-2408-4a09-94ff-17db12922f54/bin/utaipan-WLngWcDbfI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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 0.2.0-7b2dab5 [2021-10-11 02:23:27,836 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:23:27,839 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:23:27,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:23:27,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:23:27,905 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:23:27,907 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:23:27,911 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:23:27,914 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:23:27,920 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:23:27,921 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:23:27,922 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:23:27,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:23:27,926 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:23:27,927 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:23:27,929 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:23:27,931 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:23:27,936 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:23:27,938 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:23:27,949 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:23:27,951 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:23:27,953 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:23:27,956 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:23:27,957 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:23:27,966 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:23:27,967 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:23:27,967 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:23:27,969 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:23:27,970 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:23:27,971 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:23:27,972 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:23:27,973 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:23:27,975 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:23:27,976 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:23:27,977 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:23:27,977 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:23:27,978 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:23:27,978 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:23:27,979 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:23:27,979 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:23:27,980 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:23:27,983 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9a87f-2408-4a09-94ff-17db12922f54/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-11 02:23:28,026 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:23:28,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:23:28,028 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:23:28,034 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:23:28,035 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:23:28,035 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:23:28,035 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:23:28,035 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:23:28,035 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:23:28,036 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:23:28,037 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:23:28,037 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:23:28,037 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:23:28,037 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:23:28,038 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:23:28,038 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 02:23:28,038 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 02:23:28,039 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:23:28,039 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:23:28,039 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 02:23:28,039 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:23:28,040 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:23:28,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:23:28,040 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-11 02:23:28,040 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-11 02:23:28,040 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-11 02:23:28,042 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:23:28,042 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:23:28,042 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:23:28,043 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:23:28,043 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:23:28,043 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:23:28,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:23:28,044 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:23:28,044 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:23:28,044 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:23:28,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:23:28,044 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:23:28,045 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:23:28,045 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9a87f-2408-4a09-94ff-17db12922f54/bin/utaipan-WLngWcDbfI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9a87f-2408-4a09-94ff-17db12922f54/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25bb35238109f4fc42bc09877cec45401fedd3ae [2021-10-11 02:23:28,305 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:23:28,327 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:23:28,329 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:23:28,331 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:23:28,331 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:23:28,332 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9a87f-2408-4a09-94ff-17db12922f54/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/array-memsafety/cstrncat_unsafe.c [2021-10-11 02:23:28,405 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9a87f-2408-4a09-94ff-17db12922f54/bin/utaipan-WLngWcDbfI/data/d3c4185e3/fb820feb8e2f4599a6ff61691f4b7f90/FLAG2fd5f8bbd [2021-10-11 02:23:28,958 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:23:28,959 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9a87f-2408-4a09-94ff-17db12922f54/sv-benchmarks/c/array-memsafety/cstrncat_unsafe.c [2021-10-11 02:23:28,970 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9a87f-2408-4a09-94ff-17db12922f54/bin/utaipan-WLngWcDbfI/data/d3c4185e3/fb820feb8e2f4599a6ff61691f4b7f90/FLAG2fd5f8bbd [2021-10-11 02:23:29,363 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9a87f-2408-4a09-94ff-17db12922f54/bin/utaipan-WLngWcDbfI/data/d3c4185e3/fb820feb8e2f4599a6ff61691f4b7f90 [2021-10-11 02:23:29,365 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:23:29,366 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:23:29,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:23:29,368 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:23:29,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:23:29,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:23:29" (1/1) ... [2021-10-11 02:23:29,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6518f429 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:29, skipping insertion in model container [2021-10-11 02:23:29,374 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:23:29" (1/1) ... [2021-10-11 02:23:29,381 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:23:29,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:23:29,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:23:29,656 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:23:29,672 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:23:29,685 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:23:29,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:29 WrapperNode [2021-10-11 02:23:29,686 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:23:29,689 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:23:29,690 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:23:29,690 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:23:29,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:29" (1/1) ... [2021-10-11 02:23:29,706 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:29" (1/1) ... [2021-10-11 02:23:29,734 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:23:29,736 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:23:29,736 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:23:29,736 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:23:29,745 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:29" (1/1) ... [2021-10-11 02:23:29,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:29" (1/1) ... [2021-10-11 02:23:29,758 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:29" (1/1) ... [2021-10-11 02:23:29,758 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:29" (1/1) ... [2021-10-11 02:23:29,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:29" (1/1) ... [2021-10-11 02:23:29,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:29" (1/1) ... [2021-10-11 02:23:29,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:29" (1/1) ... [2021-10-11 02:23:29,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:23:29,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:23:29,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:23:29,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:23:29,775 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:29" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9a87f-2408-4a09-94ff-17db12922f54/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:23:29,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:23:29,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:23:29,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:23:29,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:23:30,394 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:23:30,394 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-11 02:23:30,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:30 BoogieIcfgContainer [2021-10-11 02:23:30,397 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:23:30,400 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:23:30,400 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:23:30,404 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:23:30,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:23:29" (1/3) ... [2021-10-11 02:23:30,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eb5100a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:23:30, skipping insertion in model container [2021-10-11 02:23:30,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:29" (2/3) ... [2021-10-11 02:23:30,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eb5100a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:23:30, skipping insertion in model container [2021-10-11 02:23:30,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:30" (3/3) ... [2021-10-11 02:23:30,408 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrncat_unsafe.c [2021-10-11 02:23:30,422 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:23:30,426 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 11 error locations. [2021-10-11 02:23:30,437 INFO L253 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-10-11 02:23:30,468 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:23:30,469 INFO L378 AbstractCegarLoop]: Hoare is false [2021-10-11 02:23:30,469 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:23:30,469 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:23:30,470 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:23:30,470 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:23:30,470 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:23:30,470 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:23:30,485 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2021-10-11 02:23:30,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-11 02:23:30,494 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:30,494 INFO L422 BasicCegarLoop]: trace histogram [1, 1] [2021-10-11 02:23:30,495 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:23:30,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:30,501 INFO L82 PathProgramCache]: Analyzing trace with hash 2891, now seen corresponding path program 1 times [2021-10-11 02:23:30,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:30,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910013839] [2021-10-11 02:23:30,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:30,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:23:30,620 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:23:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:23:30,651 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:23:30,675 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:23:30,676 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:23:30,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:23:30,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:23:30 BoogieIcfgContainer [2021-10-11 02:23:30,706 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:23:30,708 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:23:30,708 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:23:30,708 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:23:30,709 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:30" (3/4) ... [2021-10-11 02:23:30,711 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:23:30,776 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9a87f-2408-4a09-94ff-17db12922f54/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:23:30,777 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:23:30,779 INFO L168 Benchmark]: Toolchain (without parser) took 1411.40 ms. Allocated memory was 104.9 MB in the beginning and 134.2 MB in the end (delta: 29.4 MB). Free memory was 73.5 MB in the beginning and 110.2 MB in the end (delta: -36.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:23:30,783 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 104.9 MB. Free memory is still 62.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:23:30,784 INFO L168 Benchmark]: CACSL2BoogieTranslator took 319.44 ms. Allocated memory is still 104.9 MB. Free memory was 73.2 MB in the beginning and 81.6 MB in the end (delta: -8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:30,791 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.87 ms. Allocated memory is still 104.9 MB. Free memory was 81.6 MB in the beginning and 80.0 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:23:30,792 INFO L168 Benchmark]: Boogie Preprocessor took 34.50 ms. Allocated memory is still 104.9 MB. Free memory was 80.0 MB in the beginning and 79.2 MB in the end (delta: 828.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:30,793 INFO L168 Benchmark]: RCFGBuilder took 626.40 ms. Allocated memory is still 104.9 MB. Free memory was 79.2 MB in the beginning and 61.3 MB in the end (delta: 17.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:30,794 INFO L168 Benchmark]: TraceAbstraction took 306.08 ms. Allocated memory was 104.9 MB in the beginning and 134.2 MB in the end (delta: 29.4 MB). Free memory was 60.7 MB in the beginning and 111.0 MB in the end (delta: -50.3 MB). Peak memory consumption was 14.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:30,795 INFO L168 Benchmark]: Witness Printer took 68.91 ms. Allocated memory is still 134.2 MB. Free memory was 110.9 MB in the beginning and 110.2 MB in the end (delta: 731.8 kB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:30,803 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 104.9 MB. Free memory is still 62.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 319.44 ms. Allocated memory is still 104.9 MB. Free memory was 73.2 MB in the beginning and 81.6 MB in the end (delta: -8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.87 ms. Allocated memory is still 104.9 MB. Free memory was 81.6 MB in the beginning and 80.0 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.50 ms. Allocated memory is still 104.9 MB. Free memory was 80.0 MB in the beginning and 79.2 MB in the end (delta: 828.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 626.40 ms. Allocated memory is still 104.9 MB. Free memory was 79.2 MB in the beginning and 61.3 MB in the end (delta: 17.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 306.08 ms. Allocated memory was 104.9 MB in the beginning and 134.2 MB in the end (delta: 29.4 MB). Free memory was 60.7 MB in the beginning and 111.0 MB in the end (delta: -50.3 MB). Peak memory consumption was 14.5 MB. Max. memory is 16.1 GB. * Witness Printer took 68.91 ms. Allocated memory is still 134.2 MB. Free memory was 110.9 MB in the beginning and 110.2 MB in the end (delta: 731.8 kB). Peak memory consumption was 4.7 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(); [L5] char *s = s1; [L7] \read(*s) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 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=25occurred 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, 2 NumberOfCodeBlocks, 2 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...