./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrcat_unsafe.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_210bdd4d-23ea-4ade-bbee-eab53cf9347e/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_210bdd4d-23ea-4ade-bbee-eab53cf9347e/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_210bdd4d-23ea-4ade-bbee-eab53cf9347e/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_210bdd4d-23ea-4ade-bbee-eab53cf9347e/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrcat_unsafe.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_210bdd4d-23ea-4ade-bbee-eab53cf9347e/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_210bdd4d-23ea-4ade-bbee-eab53cf9347e/bin/utaipan-eEHZpOm5b7 --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 f35e4091ba483da9f0b2bb24c6ab92803922823d78b3627798806ae597763363 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:36:50,875 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:36:50,880 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:36:50,926 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:36:50,926 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:36:50,928 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:36:50,930 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:36:50,932 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:36:50,935 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:36:50,936 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:36:50,937 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:36:50,939 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:36:50,939 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:36:50,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:36:50,942 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:36:50,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:36:50,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:36:50,954 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:36:50,956 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:36:50,960 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:36:50,967 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:36:50,969 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:36:50,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:36:50,973 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:36:50,978 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:36:50,983 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:36:50,983 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:36:50,986 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:36:50,986 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:36:50,988 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:36:50,989 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:36:50,991 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:36:50,993 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:36:50,995 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:36:50,997 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:36:50,997 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:36:50,998 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:36:50,998 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:36:50,998 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:36:51,000 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:36:51,000 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:36:51,005 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_210bdd4d-23ea-4ade-bbee-eab53cf9347e/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-25 19:36:51,039 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:36:51,039 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:36:51,039 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:36:51,040 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:36:51,040 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:36:51,041 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:36:51,041 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:36:51,041 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:36:51,042 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:36:51,042 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:36:51,042 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:36:51,042 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:36:51,043 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:36:51,043 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:36:51,043 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:36:51,043 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:36:51,044 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:36:51,044 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:36:51,045 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 19:36:51,045 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 19:36:51,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:36:51,046 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:36:51,046 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 19:36:51,046 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:36:51,046 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:36:51,047 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:36:51,047 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 19:36:51,047 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 19:36:51,047 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 19:36:51,048 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:36:51,048 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 19:36:51,048 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:36:51,048 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:36:51,049 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:36:51,049 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:36:51,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:36:51,049 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:36:51,050 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:36:51,050 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:36:51,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:36:51,051 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:36:51,051 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:36:51,051 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_210bdd4d-23ea-4ade-bbee-eab53cf9347e/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_210bdd4d-23ea-4ade-bbee-eab53cf9347e/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f35e4091ba483da9f0b2bb24c6ab92803922823d78b3627798806ae597763363 [2021-11-25 19:36:51,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:36:51,388 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:36:51,391 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:36:51,392 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:36:51,392 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:36:51,393 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_210bdd4d-23ea-4ade-bbee-eab53cf9347e/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-memsafety/cstrcat_unsafe.c [2021-11-25 19:36:51,484 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_210bdd4d-23ea-4ade-bbee-eab53cf9347e/bin/utaipan-eEHZpOm5b7/data/22efda46c/1da68d9322904e9eaac136fb095686ac/FLAG76f7d8843 [2021-11-25 19:36:52,072 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:36:52,073 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_210bdd4d-23ea-4ade-bbee-eab53cf9347e/sv-benchmarks/c/array-memsafety/cstrcat_unsafe.c [2021-11-25 19:36:52,078 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_210bdd4d-23ea-4ade-bbee-eab53cf9347e/bin/utaipan-eEHZpOm5b7/data/22efda46c/1da68d9322904e9eaac136fb095686ac/FLAG76f7d8843 [2021-11-25 19:36:52,446 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_210bdd4d-23ea-4ade-bbee-eab53cf9347e/bin/utaipan-eEHZpOm5b7/data/22efda46c/1da68d9322904e9eaac136fb095686ac [2021-11-25 19:36:52,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:36:52,450 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:36:52,452 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:36:52,452 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:36:52,456 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:36:52,457 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:36:52" (1/1) ... [2021-11-25 19:36:52,459 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@503f5ab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:52, skipping insertion in model container [2021-11-25 19:36:52,459 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:36:52" (1/1) ... [2021-11-25 19:36:52,465 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:36:52,478 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:36:52,630 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:36:52,647 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:36:52,689 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:36:52,700 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:36:52,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:52 WrapperNode [2021-11-25 19:36:52,701 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:36:52,702 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:36:52,702 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:36:52,702 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:36:52,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:52" (1/1) ... [2021-11-25 19:36:52,718 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:52" (1/1) ... [2021-11-25 19:36:52,735 INFO L137 Inliner]: procedures = 7, calls = 6, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 42 [2021-11-25 19:36:52,736 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:36:52,736 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:36:52,737 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:36:52,737 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:36:52,750 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:52" (1/1) ... [2021-11-25 19:36:52,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:52" (1/1) ... [2021-11-25 19:36:52,752 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:52" (1/1) ... [2021-11-25 19:36:52,752 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:52" (1/1) ... [2021-11-25 19:36:52,756 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:52" (1/1) ... [2021-11-25 19:36:52,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:52" (1/1) ... [2021-11-25 19:36:52,760 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:52" (1/1) ... [2021-11-25 19:36:52,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:36:52,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:36:52,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:36:52,777 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:36:52,778 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:52" (1/1) ... [2021-11-25 19:36:52,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:36:52,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_210bdd4d-23ea-4ade-bbee-eab53cf9347e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:36:52,814 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_210bdd4d-23ea-4ade-bbee-eab53cf9347e/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:36:52,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_210bdd4d-23ea-4ade-bbee-eab53cf9347e/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:36:52,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:36:52,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:36:52,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:36:52,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:36:52,954 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:36:52,956 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:36:53,079 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:36:53,094 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:36:53,094 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 19:36:53,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:36:53 BoogieIcfgContainer [2021-11-25 19:36:53,097 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:36:53,100 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:36:53,100 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:36:53,124 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:36:53,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:36:52" (1/3) ... [2021-11-25 19:36:53,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@592f2ffd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:36:53, skipping insertion in model container [2021-11-25 19:36:53,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:52" (2/3) ... [2021-11-25 19:36:53,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@592f2ffd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:36:53, skipping insertion in model container [2021-11-25 19:36:53,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:36:53" (3/3) ... [2021-11-25 19:36:53,127 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrcat_unsafe.c [2021-11-25 19:36:53,138 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:36:53,138 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-11-25 19:36:53,218 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:36:53,242 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:36:53,242 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-11-25 19:36:53,266 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:53,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-11-25 19:36:53,286 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:36:53,287 INFO L514 BasicCegarLoop]: trace histogram [1, 1] [2021-11-25 19:36:53,287 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 19:36:53,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:36:53,308 INFO L85 PathProgramCache]: Analyzing trace with hash 2302, now seen corresponding path program 1 times [2021-11-25 19:36:53,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:36:53,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287594614] [2021-11-25 19:36:53,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:36:53,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:36:53,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 19:36:53,419 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-25 19:36:53,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 19:36:53,446 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-25 19:36:53,448 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-25 19:36:53,449 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION (6 of 7 remaining) [2021-11-25 19:36:53,451 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (5 of 7 remaining) [2021-11-25 19:36:53,451 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (4 of 7 remaining) [2021-11-25 19:36:53,452 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (3 of 7 remaining) [2021-11-25 19:36:53,452 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (2 of 7 remaining) [2021-11-25 19:36:53,452 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (1 of 7 remaining) [2021-11-25 19:36:53,453 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2021-11-25 19:36:53,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:36:53,457 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-25 19:36:53,461 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 19:36:53,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 07:36:53 BoogieIcfgContainer [2021-11-25 19:36:53,475 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 19:36:53,476 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 19:36:53,476 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 19:36:53,477 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 19:36:53,477 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:36:53" (3/4) ... [2021-11-25 19:36:53,479 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-25 19:36:53,507 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_210bdd4d-23ea-4ade-bbee-eab53cf9347e/bin/utaipan-eEHZpOm5b7/witness.graphml [2021-11-25 19:36:53,507 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 19:36:53,508 INFO L158 Benchmark]: Toolchain (without parser) took 1057.96ms. Allocated memory was 104.9MB in the beginning and 136.3MB in the end (delta: 31.5MB). Free memory was 73.1MB in the beginning and 84.0MB in the end (delta: -10.9MB). Peak memory consumption was 17.8MB. Max. memory is 16.1GB. [2021-11-25 19:36:53,509 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 104.9MB. Free memory was 60.8MB in the beginning and 60.7MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:36:53,510 INFO L158 Benchmark]: CACSL2BoogieTranslator took 249.16ms. Allocated memory was 104.9MB in the beginning and 136.3MB in the end (delta: 31.5MB). Free memory was 73.1MB in the beginning and 111.7MB in the end (delta: -38.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 19:36:53,510 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.79ms. Allocated memory is still 136.3MB. Free memory was 111.7MB in the beginning and 110.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:36:53,511 INFO L158 Benchmark]: Boogie Preprocessor took 39.35ms. Allocated memory is still 136.3MB. Free memory was 110.2MB in the beginning and 109.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 19:36:53,512 INFO L158 Benchmark]: RCFGBuilder took 320.99ms. Allocated memory is still 136.3MB. Free memory was 109.2MB in the beginning and 98.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 19:36:53,512 INFO L158 Benchmark]: TraceAbstraction took 375.87ms. Allocated memory is still 136.3MB. Free memory was 98.2MB in the beginning and 85.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-25 19:36:53,513 INFO L158 Benchmark]: Witness Printer took 30.94ms. Allocated memory is still 136.3MB. Free memory was 85.7MB in the beginning and 84.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 19:36:53,517 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 104.9MB. Free memory was 60.8MB in the beginning and 60.7MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 249.16ms. Allocated memory was 104.9MB in the beginning and 136.3MB in the end (delta: 31.5MB). Free memory was 73.1MB in the beginning and 111.7MB in the end (delta: -38.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.79ms. Allocated memory is still 136.3MB. Free memory was 111.7MB in the beginning and 110.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 39.35ms. Allocated memory is still 136.3MB. Free memory was 110.2MB in the beginning and 109.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 320.99ms. Allocated memory is still 136.3MB. Free memory was 109.2MB in the beginning and 98.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 375.87ms. Allocated memory is still 136.3MB. Free memory was 98.2MB in the beginning and 85.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 30.94ms. Allocated memory is still 136.3MB. Free memory was 85.7MB in the beginning and 84.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 5]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L15] char *s1; [L16] char *s2; [L17] CALL cstrcat(s1, s2) [L3] char *s = s1; VAL [s={4:2}, s1={4:2}, s1={4:2}, s2={6:5}, s2={6:5}] [L5] \read(*s) - UnprovableResult [Line: 5]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 8]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 8]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 8]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 8]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, InterpolantAutomatonStates: 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! [2021-11-25 19:36:53,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_210bdd4d-23ea-4ade-bbee-eab53cf9347e/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)