./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/reverse_array_unsafe.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_f104c514-09fe-4697-ba10-8bcabbfac2a8/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_f104c514-09fe-4697-ba10-8bcabbfac2a8/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f104c514-09fe-4697-ba10-8bcabbfac2a8/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f104c514-09fe-4697-ba10-8bcabbfac2a8/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/reverse_array_unsafe.i -s /tmp/vcloud-vcloud-master/worker/run_dir_f104c514-09fe-4697-ba10-8bcabbfac2a8/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f104c514-09fe-4697-ba10-8bcabbfac2a8/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 94dea6eddb2a1fd381e32f00f2713f560a4fbdc4 ............................................................................................................................................................................................................................................................................................ 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-a4ecdab [2020-11-22 12:59:44,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:59:44,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:59:44,931 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:59:44,932 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:59:44,933 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:59:44,935 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:59:44,937 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:59:44,940 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:59:44,941 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:59:44,942 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:59:44,944 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:59:44,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:59:44,945 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:59:44,947 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:59:44,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:59:44,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:59:44,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:59:44,953 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:59:44,958 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:59:44,961 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:59:44,965 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:59:44,967 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:59:44,968 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:59:44,974 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:59:44,975 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:59:44,975 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:59:44,982 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:59:44,983 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:59:44,984 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:59:44,984 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:59:44,986 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:59:44,988 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:59:44,989 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:59:44,990 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:59:44,990 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:59:44,991 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:59:44,991 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:59:44,992 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:59:44,993 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:59:44,993 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:59:44,997 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f104c514-09fe-4697-ba10-8bcabbfac2a8/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-22 12:59:45,022 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:59:45,022 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:59:45,023 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:59:45,023 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:59:45,023 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:59:45,023 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:59:45,024 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 12:59:45,024 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:59:45,024 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:59:45,024 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 12:59:45,024 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 12:59:45,024 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:59:45,025 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 12:59:45,025 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 12:59:45,025 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 12:59:45,026 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-22 12:59:45,026 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-22 12:59:45,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:59:45,026 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 12:59:45,027 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-22 12:59:45,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 12:59:45,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 12:59:45,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:59:45,027 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-22 12:59:45,027 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-22 12:59:45,028 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-22 12:59:45,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:59:45,028 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 12:59:45,028 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 12:59:45,028 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:59:45,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:59:45,029 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:59:45,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:59:45,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:59:45,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:59:45,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:59:45,030 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 12:59:45,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 12:59:45,030 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:59:45,030 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:59:45,030 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_f104c514-09fe-4697-ba10-8bcabbfac2a8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_f104c514-09fe-4697-ba10-8bcabbfac2a8/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 94dea6eddb2a1fd381e32f00f2713f560a4fbdc4 [2020-11-22 12:59:45,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:59:45,291 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:59:45,295 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:59:45,296 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:59:45,297 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:59:45,298 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f104c514-09fe-4697-ba10-8bcabbfac2a8/bin/utaipan/../../sv-benchmarks/c/array-memsafety/reverse_array_unsafe.i [2020-11-22 12:59:45,361 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f104c514-09fe-4697-ba10-8bcabbfac2a8/bin/utaipan/data/229dcda42/49c90a53c46f47089f529d8ebfe47ddb/FLAG810299677 [2020-11-22 12:59:45,926 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:59:45,927 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f104c514-09fe-4697-ba10-8bcabbfac2a8/sv-benchmarks/c/array-memsafety/reverse_array_unsafe.i [2020-11-22 12:59:45,941 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f104c514-09fe-4697-ba10-8bcabbfac2a8/bin/utaipan/data/229dcda42/49c90a53c46f47089f529d8ebfe47ddb/FLAG810299677 [2020-11-22 12:59:46,252 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f104c514-09fe-4697-ba10-8bcabbfac2a8/bin/utaipan/data/229dcda42/49c90a53c46f47089f529d8ebfe47ddb [2020-11-22 12:59:46,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:59:46,256 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:59:46,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:59:46,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:59:46,264 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:59:46,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:59:46" (1/1) ... [2020-11-22 12:59:46,273 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16ceecec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:46, skipping insertion in model container [2020-11-22 12:59:46,273 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:59:46" (1/1) ... [2020-11-22 12:59:46,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:59:46,341 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:59:46,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:59:46,680 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:59:46,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:59:46,759 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:59:46,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:46 WrapperNode [2020-11-22 12:59:46,760 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:59:46,761 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:59:46,761 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:59:46,761 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:59:46,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:46" (1/1) ... [2020-11-22 12:59:46,782 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:46" (1/1) ... [2020-11-22 12:59:46,803 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:59:46,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:59:46,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:59:46,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:59:46,812 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:46" (1/1) ... [2020-11-22 12:59:46,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:46" (1/1) ... [2020-11-22 12:59:46,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:46" (1/1) ... [2020-11-22 12:59:46,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:46" (1/1) ... [2020-11-22 12:59:46,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:46" (1/1) ... [2020-11-22 12:59:46,825 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:46" (1/1) ... [2020-11-22 12:59:46,827 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:46" (1/1) ... [2020-11-22 12:59:46,830 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:59:46,830 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:59:46,830 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:59:46,831 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:59:46,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:46" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f104c514-09fe-4697-ba10-8bcabbfac2a8/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 [2020-11-22 12:59:46,924 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-22 12:59:46,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-22 12:59:46,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 12:59:46,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 12:59:46,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:59:46,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:59:47,696 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:59:47,697 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-11-22 12:59:47,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:59:47 BoogieIcfgContainer [2020-11-22 12:59:47,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:59:47,702 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:59:47,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:59:47,706 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:59:47,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:59:46" (1/3) ... [2020-11-22 12:59:47,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36c69014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:59:47, skipping insertion in model container [2020-11-22 12:59:47,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:46" (2/3) ... [2020-11-22 12:59:47,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36c69014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:59:47, skipping insertion in model container [2020-11-22 12:59:47,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:59:47" (3/3) ... [2020-11-22 12:59:47,710 INFO L111 eAbstractionObserver]: Analyzing ICFG reverse_array_unsafe.i [2020-11-22 12:59:47,721 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:59:47,726 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 23 error locations. [2020-11-22 12:59:47,738 INFO L253 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2020-11-22 12:59:47,771 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:59:47,771 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-22 12:59:47,771 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:59:47,771 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:59:47,772 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:59:47,772 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:59:47,772 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:59:47,772 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:59:47,788 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-11-22 12:59:47,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-22 12:59:47,793 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:59:47,793 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-22 12:59:47,794 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 12:59:47,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:59:47,799 INFO L82 PathProgramCache]: Analyzing trace with hash 155459, now seen corresponding path program 1 times [2020-11-22 12:59:47,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:59:47,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781747157] [2020-11-22 12:59:47,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:59:47,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:59:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:59:47,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781747157] [2020-11-22 12:59:47,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:59:47,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-22 12:59:47,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816312420] [2020-11-22 12:59:48,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:59:48,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:59:48,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:59:48,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:59:48,020 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-11-22 12:59:48,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:59:48,108 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-11-22 12:59:48,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:59:48,110 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-22 12:59:48,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:59:48,118 INFO L225 Difference]: With dead ends: 39 [2020-11-22 12:59:48,118 INFO L226 Difference]: Without dead ends: 38 [2020-11-22 12:59:48,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:59:48,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-22 12:59:48,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-11-22 12:59:48,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-22 12:59:48,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-11-22 12:59:48,151 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 3 [2020-11-22 12:59:48,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:59:48,151 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-11-22 12:59:48,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:59:48,151 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-11-22 12:59:48,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-22 12:59:48,152 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:59:48,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-22 12:59:48,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 12:59:48,152 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 12:59:48,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:59:48,153 INFO L82 PathProgramCache]: Analyzing trace with hash 155460, now seen corresponding path program 1 times [2020-11-22 12:59:48,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:59:48,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406633216] [2020-11-22 12:59:48,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:59:48,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 12:59:48,194 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 12:59:48,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 12:59:48,224 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 12:59:48,251 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-22 12:59:48,251 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-22 12:59:48,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 12:59:48,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:59:48 BoogieIcfgContainer [2020-11-22 12:59:48,272 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:59:48,273 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:59:48,273 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:59:48,273 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:59:48,274 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:59:47" (3/4) ... [2020-11-22 12:59:48,278 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-22 12:59:48,305 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f104c514-09fe-4697-ba10-8bcabbfac2a8/bin/utaipan/witness.graphml [2020-11-22 12:59:48,305 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:59:48,307 INFO L168 Benchmark]: Toolchain (without parser) took 2049.95 ms. Allocated memory was 138.4 MB in the beginning and 167.8 MB in the end (delta: 29.4 MB). Free memory was 104.0 MB in the beginning and 102.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 31.3 MB. Max. memory is 16.1 GB. [2020-11-22 12:59:48,308 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 79.7 MB. Free memory was 38.8 MB in the beginning and 38.8 MB in the end (delta: 43.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:59:48,309 INFO L168 Benchmark]: CACSL2BoogieTranslator took 500.01 ms. Allocated memory is still 138.4 MB. Free memory was 104.0 MB in the beginning and 101.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-22 12:59:48,309 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.60 ms. Allocated memory is still 138.4 MB. Free memory was 101.2 MB in the beginning and 99.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:59:48,310 INFO L168 Benchmark]: Boogie Preprocessor took 26.34 ms. Allocated memory is still 138.4 MB. Free memory was 99.2 MB in the beginning and 97.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:59:48,311 INFO L168 Benchmark]: RCFGBuilder took 868.79 ms. Allocated memory was 138.4 MB in the beginning and 167.8 MB in the end (delta: 29.4 MB). Free memory was 97.9 MB in the beginning and 131.7 MB in the end (delta: -33.8 MB). Peak memory consumption was 25.6 MB. Max. memory is 16.1 GB. [2020-11-22 12:59:48,311 INFO L168 Benchmark]: TraceAbstraction took 570.81 ms. Allocated memory is still 167.8 MB. Free memory was 130.5 MB in the beginning and 104.1 MB in the end (delta: 26.4 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2020-11-22 12:59:48,312 INFO L168 Benchmark]: Witness Printer took 32.58 ms. Allocated memory is still 167.8 MB. Free memory was 104.1 MB in the beginning and 102.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:59:48,316 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 79.7 MB. Free memory was 38.8 MB in the beginning and 38.8 MB in the end (delta: 43.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 500.01 ms. Allocated memory is still 138.4 MB. Free memory was 104.0 MB in the beginning and 101.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.60 ms. Allocated memory is still 138.4 MB. Free memory was 101.2 MB in the beginning and 99.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.34 ms. Allocated memory is still 138.4 MB. Free memory was 99.2 MB in the beginning and 97.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 868.79 ms. Allocated memory was 138.4 MB in the beginning and 167.8 MB in the end (delta: 29.4 MB). Free memory was 97.9 MB in the beginning and 131.7 MB in the end (delta: -33.8 MB). Peak memory consumption was 25.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 570.81 ms. Allocated memory is still 167.8 MB. Free memory was 130.5 MB in the beginning and 104.1 MB in the end (delta: 26.4 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * Witness Printer took 32.58 ms. Allocated memory is still 167.8 MB. Free memory was 104.1 MB in the beginning and 102.3 MB in the end (delta: 1.8 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: 522]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L515] int i, j, tmp; [L516] int length = __VERIFIER_nondet_int(); [L517] COND FALSE !(length < 1) [L518] COND TRUE length % 2 == 0 [L518] length++ [L519] int *arr = __builtin_alloca (length); [L520] int i = 0; [L520] COND TRUE i < length [L522] arr[i] = __VERIFIER_nondet_int() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 44 locations, 23 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 20 SDtfs, 38 SDslu, 0 SDs, 0 SdLazy, 26 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred 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: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 2 ConstructedInterpolants, 0 QuantifiedInterpolants, 20 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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...