./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-vcloud-master/worker/run_dir_91db8c6c-4239-4c56-8e15-e69445159b37/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_91db8c6c-4239-4c56-8e15-e69445159b37/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_91db8c6c-4239-4c56-8e15-e69445159b37/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_91db8c6c-4239-4c56-8e15-e69445159b37/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrncat_unsafe.c -s /tmp/vcloud-vcloud-master/worker/run_dir_91db8c6c-4239-4c56-8e15-e69445159b37/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_91db8c6c-4239-4c56-8e15-e69445159b37/bin/utaipan --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 [2020-12-09 08:17:17,041 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 08:17:17,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 08:17:17,067 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 08:17:17,067 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 08:17:17,068 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 08:17:17,069 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 08:17:17,071 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 08:17:17,073 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 08:17:17,073 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 08:17:17,074 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 08:17:17,075 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 08:17:17,075 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 08:17:17,076 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 08:17:17,077 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 08:17:17,078 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 08:17:17,079 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 08:17:17,080 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 08:17:17,081 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 08:17:17,083 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 08:17:17,084 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 08:17:17,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 08:17:17,087 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 08:17:17,088 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 08:17:17,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 08:17:17,091 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 08:17:17,092 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 08:17:17,093 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 08:17:17,093 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 08:17:17,094 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 08:17:17,095 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 08:17:17,095 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 08:17:17,096 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 08:17:17,097 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 08:17:17,098 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 08:17:17,099 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 08:17:17,099 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 08:17:17,100 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 08:17:17,100 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 08:17:17,101 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 08:17:17,102 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 08:17:17,102 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_91db8c6c-4239-4c56-8e15-e69445159b37/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 08:17:17,123 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 08:17:17,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 08:17:17,124 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 08:17:17,124 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 08:17:17,125 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 08:17:17,125 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 08:17:17,125 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 08:17:17,125 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 08:17:17,125 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 08:17:17,125 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 08:17:17,125 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 08:17:17,125 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 08:17:17,126 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 08:17:17,126 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 08:17:17,126 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 08:17:17,126 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 08:17:17,127 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 08:17:17,127 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 08:17:17,127 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 08:17:17,127 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 08:17:17,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 08:17:17,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 08:17:17,128 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 08:17:17,128 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 08:17:17,128 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 08:17:17,128 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 08:17:17,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 08:17:17,128 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 08:17:17,128 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 08:17:17,129 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 08:17:17,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 08:17:17,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 08:17:17,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 08:17:17,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 08:17:17,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 08:17:17,130 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 08:17:17,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 08:17:17,130 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 08:17:17,130 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 08:17:17,130 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-vcloud-master/worker/run_dir_91db8c6c-4239-4c56-8e15-e69445159b37/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_91db8c6c-4239-4c56-8e15-e69445159b37/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25bb35238109f4fc42bc09877cec45401fedd3ae [2020-12-09 08:17:17,317 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 08:17:17,337 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 08:17:17,340 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 08:17:17,341 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 08:17:17,341 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 08:17:17,342 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_91db8c6c-4239-4c56-8e15-e69445159b37/bin/utaipan/../../sv-benchmarks/c/array-memsafety/cstrncat_unsafe.c [2020-12-09 08:17:17,387 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_91db8c6c-4239-4c56-8e15-e69445159b37/bin/utaipan/data/11b480db0/4eed455d6d7d463ba13441494e0fc933/FLAG2334ac6bb [2020-12-09 08:17:17,752 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 08:17:17,753 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_91db8c6c-4239-4c56-8e15-e69445159b37/sv-benchmarks/c/array-memsafety/cstrncat_unsafe.c [2020-12-09 08:17:17,758 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_91db8c6c-4239-4c56-8e15-e69445159b37/bin/utaipan/data/11b480db0/4eed455d6d7d463ba13441494e0fc933/FLAG2334ac6bb [2020-12-09 08:17:17,767 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_91db8c6c-4239-4c56-8e15-e69445159b37/bin/utaipan/data/11b480db0/4eed455d6d7d463ba13441494e0fc933 [2020-12-09 08:17:17,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 08:17:17,770 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 08:17:17,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 08:17:17,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 08:17:17,774 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 08:17:17,774 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:17:17" (1/1) ... [2020-12-09 08:17:17,776 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70078c2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:17:17, skipping insertion in model container [2020-12-09 08:17:17,776 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:17:17" (1/1) ... [2020-12-09 08:17:17,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 08:17:17,794 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 08:17:17,890 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:17:17,897 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 08:17:17,908 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:17:17,917 INFO L208 MainTranslator]: Completed translation [2020-12-09 08:17:17,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:17:17 WrapperNode [2020-12-09 08:17:17,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 08:17:17,919 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 08:17:17,919 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 08:17:17,919 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 08:17:17,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:17:17" (1/1) ... [2020-12-09 08:17:17,930 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:17:17" (1/1) ... [2020-12-09 08:17:17,943 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 08:17:17,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 08:17:17,944 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 08:17:17,944 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 08:17:17,950 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:17:17" (1/1) ... [2020-12-09 08:17:17,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:17:17" (1/1) ... [2020-12-09 08:17:17,951 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:17:17" (1/1) ... [2020-12-09 08:17:17,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:17:17" (1/1) ... [2020-12-09 08:17:17,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:17:17" (1/1) ... [2020-12-09 08:17:17,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:17:17" (1/1) ... [2020-12-09 08:17:17,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:17:17" (1/1) ... [2020-12-09 08:17:17,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 08:17:17,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 08:17:17,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 08:17:17,961 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 08:17:17,961 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:17:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_91db8c6c-4239-4c56-8e15-e69445159b37/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 08:17:18,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 08:17:18,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 08:17:18,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 08:17:18,014 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 08:17:18,203 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 08:17:18,203 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-09 08:17:18,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:17:18 BoogieIcfgContainer [2020-12-09 08:17:18,205 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 08:17:18,206 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 08:17:18,206 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 08:17:18,208 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 08:17:18,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:17:17" (1/3) ... [2020-12-09 08:17:18,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@402b6fba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:17:18, skipping insertion in model container [2020-12-09 08:17:18,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:17:17" (2/3) ... [2020-12-09 08:17:18,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@402b6fba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:17:18, skipping insertion in model container [2020-12-09 08:17:18,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:17:18" (3/3) ... [2020-12-09 08:17:18,211 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrncat_unsafe.c [2020-12-09 08:17:18,220 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 08:17:18,222 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 11 error locations. [2020-12-09 08:17:18,230 INFO L253 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2020-12-09 08:17:18,243 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 08:17:18,244 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 08:17:18,244 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 08:17:18,244 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 08:17:18,244 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 08:17:18,244 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 08:17:18,244 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 08:17:18,244 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 08:17:18,253 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-12-09 08:17:18,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2020-12-09 08:17:18,257 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:17:18,257 INFO L422 BasicCegarLoop]: trace histogram [1, 1] [2020-12-09 08:17:18,258 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]=== [2020-12-09 08:17:18,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:17:18,262 INFO L82 PathProgramCache]: Analyzing trace with hash 2891, now seen corresponding path program 1 times [2020-12-09 08:17:18,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:17:18,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622972860] [2020-12-09 08:17:18,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:17:18,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 08:17:18,332 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 08:17:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 08:17:18,342 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 08:17:18,355 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 08:17:18,355 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 08:17:18,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 08:17:18,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:17:18 BoogieIcfgContainer [2020-12-09 08:17:18,368 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 08:17:18,368 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 08:17:18,368 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 08:17:18,369 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 08:17:18,369 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:17:18" (3/4) ... [2020-12-09 08:17:18,370 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 08:17:18,393 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_91db8c6c-4239-4c56-8e15-e69445159b37/bin/utaipan/witness.graphml [2020-12-09 08:17:18,393 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 08:17:18,395 INFO L168 Benchmark]: Toolchain (without parser) took 624.05 ms. Allocated memory is still 107.0 MB. Free memory was 77.0 MB in the beginning and 60.4 MB in the end (delta: 16.6 MB). Peak memory consumption was 17.4 MB. Max. memory is 16.1 GB. [2020-12-09 08:17:18,396 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 107.0 MB. Free memory is still 83.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:17:18,396 INFO L168 Benchmark]: CACSL2BoogieTranslator took 146.74 ms. Allocated memory is still 107.0 MB. Free memory was 76.8 MB in the beginning and 67.9 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 08:17:18,397 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.52 ms. Allocated memory is still 107.0 MB. Free memory was 67.8 MB in the beginning and 66.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:17:18,397 INFO L168 Benchmark]: Boogie Preprocessor took 16.04 ms. Allocated memory is still 107.0 MB. Free memory was 66.3 MB in the beginning and 65.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:17:18,398 INFO L168 Benchmark]: RCFGBuilder took 244.57 ms. Allocated memory is still 107.0 MB. Free memory was 65.1 MB in the beginning and 73.8 MB in the end (delta: -8.6 MB). Peak memory consumption was 13.2 MB. Max. memory is 16.1 GB. [2020-12-09 08:17:18,398 INFO L168 Benchmark]: TraceAbstraction took 162.03 ms. Allocated memory is still 107.0 MB. Free memory was 73.0 MB in the beginning and 62.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 08:17:18,399 INFO L168 Benchmark]: Witness Printer took 25.19 ms. Allocated memory is still 107.0 MB. Free memory was 62.3 MB in the beginning and 60.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:17:18,402 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 107.0 MB. Free memory is still 83.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 146.74 ms. Allocated memory is still 107.0 MB. Free memory was 76.8 MB in the beginning and 67.9 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 24.52 ms. Allocated memory is still 107.0 MB. Free memory was 67.8 MB in the beginning and 66.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 16.04 ms. Allocated memory is still 107.0 MB. Free memory was 66.3 MB in the beginning and 65.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 244.57 ms. Allocated memory is still 107.0 MB. Free memory was 65.1 MB in the beginning and 73.8 MB in the end (delta: -8.6 MB). Peak memory consumption was 13.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 162.03 ms. Allocated memory is still 107.0 MB. Free memory was 73.0 MB in the beginning and 62.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Witness Printer took 25.19 ms. Allocated memory is still 107.0 MB. Free memory was 62.3 MB in the beginning and 60.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L24] char *s1; [L25] char *s2; [L26] int n = __VERIFIER_nondet_int(); [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: 0.1s, 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...