./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/mult_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_77fb4e42-1789-40ec-9094-bd01f31b8fe0/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_77fb4e42-1789-40ec-9094-bd01f31b8fe0/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_77fb4e42-1789-40ec-9094-bd01f31b8fe0/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_77fb4e42-1789-40ec-9094-bd01f31b8fe0/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/mult_array_unsafe.i -s /tmp/vcloud-vcloud-master/worker/run_dir_77fb4e42-1789-40ec-9094-bd01f31b8fe0/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_77fb4e42-1789-40ec-9094-bd01f31b8fe0/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 4ceec10d001c6e3ab8acae30cb42f114023e2890 .................................................................................................................................................................................................................................................................................................................. 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 [2020-11-28 07:38:12,433 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:38:12,436 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:38:12,473 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:38:12,474 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:38:12,475 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:38:12,477 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:38:12,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:38:12,482 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:38:12,483 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:38:12,485 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:38:12,487 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:38:12,487 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:38:12,489 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:38:12,490 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:38:12,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:38:12,493 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:38:12,495 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:38:12,497 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:38:12,500 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:38:12,502 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:38:12,503 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:38:12,505 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:38:12,506 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:38:12,509 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:38:12,510 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:38:12,511 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:38:12,512 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:38:12,513 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:38:12,514 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:38:12,515 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:38:12,516 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:38:12,517 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:38:12,518 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:38:12,520 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:38:12,520 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:38:12,521 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:38:12,522 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:38:12,522 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:38:12,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:38:12,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:38:12,529 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_77fb4e42-1789-40ec-9094-bd01f31b8fe0/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-28 07:38:12,563 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:38:12,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:38:12,564 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:38:12,564 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:38:12,564 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:38:12,564 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:38:12,565 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:38:12,565 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:38:12,565 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:38:12,565 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:38:12,565 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:38:12,565 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:38:12,566 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:38:12,566 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:38:12,566 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:38:12,567 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 07:38:12,567 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 07:38:12,567 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:38:12,567 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:38:12,568 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 07:38:12,568 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:38:12,568 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:38:12,568 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:38:12,568 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 07:38:12,568 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 07:38:12,569 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 07:38:12,569 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:38:12,569 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:38:12,569 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:38:12,569 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:38:12,570 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:38:12,570 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:38:12,570 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:38:12,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:38:12,570 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:38:12,571 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:38:12,571 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:38:12,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:38:12,571 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:38:12,571 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:38:12,571 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_77fb4e42-1789-40ec-9094-bd01f31b8fe0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_77fb4e42-1789-40ec-9094-bd01f31b8fe0/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ceec10d001c6e3ab8acae30cb42f114023e2890 [2020-11-28 07:38:12,808 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:38:12,843 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:38:12,846 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:38:12,847 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:38:12,850 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:38:12,851 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_77fb4e42-1789-40ec-9094-bd01f31b8fe0/bin/utaipan/../../sv-benchmarks/c/array-memsafety/mult_array_unsafe.i [2020-11-28 07:38:12,945 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_77fb4e42-1789-40ec-9094-bd01f31b8fe0/bin/utaipan/data/ef625a45f/79c6c7f589524af99777810a503fffc2/FLAGab6898c13 [2020-11-28 07:38:13,469 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:38:13,470 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_77fb4e42-1789-40ec-9094-bd01f31b8fe0/sv-benchmarks/c/array-memsafety/mult_array_unsafe.i [2020-11-28 07:38:13,488 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_77fb4e42-1789-40ec-9094-bd01f31b8fe0/bin/utaipan/data/ef625a45f/79c6c7f589524af99777810a503fffc2/FLAGab6898c13 [2020-11-28 07:38:13,783 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_77fb4e42-1789-40ec-9094-bd01f31b8fe0/bin/utaipan/data/ef625a45f/79c6c7f589524af99777810a503fffc2 [2020-11-28 07:38:13,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:38:13,787 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:38:13,789 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:38:13,789 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:38:13,793 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:38:13,793 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:38:13" (1/1) ... [2020-11-28 07:38:13,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b754c9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:13, skipping insertion in model container [2020-11-28 07:38:13,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:38:13" (1/1) ... [2020-11-28 07:38:13,803 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:38:13,841 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:38:14,146 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:38:14,163 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:38:14,234 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:38:14,291 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:38:14,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:14 WrapperNode [2020-11-28 07:38:14,292 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:38:14,293 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:38:14,293 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:38:14,293 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:38:14,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:14" (1/1) ... [2020-11-28 07:38:14,338 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:14" (1/1) ... [2020-11-28 07:38:14,376 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:38:14,378 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:38:14,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:38:14,379 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:38:14,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:14" (1/1) ... [2020-11-28 07:38:14,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:14" (1/1) ... [2020-11-28 07:38:14,409 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:14" (1/1) ... [2020-11-28 07:38:14,409 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:14" (1/1) ... [2020-11-28 07:38:14,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:14" (1/1) ... [2020-11-28 07:38:14,435 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:14" (1/1) ... [2020-11-28 07:38:14,437 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:14" (1/1) ... [2020-11-28 07:38:14,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:38:14,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:38:14,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:38:14,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:38:14,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:14" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_77fb4e42-1789-40ec-9094-bd01f31b8fe0/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 [2020-11-28 07:38:14,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 07:38:14,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 07:38:14,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:38:14,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 07:38:14,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:38:14,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:38:15,240 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:38:15,240 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-28 07:38:15,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:38:15 BoogieIcfgContainer [2020-11-28 07:38:15,242 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:38:15,244 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:38:15,244 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:38:15,248 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:38:15,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:38:13" (1/3) ... [2020-11-28 07:38:15,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@449f6ae8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:38:15, skipping insertion in model container [2020-11-28 07:38:15,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:14" (2/3) ... [2020-11-28 07:38:15,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@449f6ae8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:38:15, skipping insertion in model container [2020-11-28 07:38:15,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:38:15" (3/3) ... [2020-11-28 07:38:15,251 INFO L111 eAbstractionObserver]: Analyzing ICFG mult_array_unsafe.i [2020-11-28 07:38:15,262 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:38:15,267 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-11-28 07:38:15,280 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-11-28 07:38:15,301 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:38:15,301 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 07:38:15,301 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:38:15,301 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:38:15,301 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:38:15,301 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:38:15,302 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:38:15,302 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:38:15,314 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-11-28 07:38:15,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 07:38:15,320 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:15,321 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-28 07:38:15,321 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:38:15,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:15,327 INFO L82 PathProgramCache]: Analyzing trace with hash 107322, now seen corresponding path program 1 times [2020-11-28 07:38:15,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:38:15,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392846471] [2020-11-28 07:38:15,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:38:15,413 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:38:15,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [383761563] [2020-11-28 07:38:15,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_77fb4e42-1789-40ec-9094-bd01f31b8fe0/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:38:15,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:38:15,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 07:38:15,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:38:15,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:15,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:38:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:15,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392846471] [2020-11-28 07:38:15,607 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:38:15,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383761563] [2020-11-28 07:38:15,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:38:15,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2020-11-28 07:38:15,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359039777] [2020-11-28 07:38:15,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:38:15,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:38:15,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:38:15,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:38:15,630 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2020-11-28 07:38:15,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:38:15,676 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2020-11-28 07:38:15,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:38:15,678 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2020-11-28 07:38:15,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:38:15,685 INFO L225 Difference]: With dead ends: 16 [2020-11-28 07:38:15,685 INFO L226 Difference]: Without dead ends: 15 [2020-11-28 07:38:15,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:38:15,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-28 07:38:15,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-28 07:38:15,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-28 07:38:15,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-11-28 07:38:15,716 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 3 [2020-11-28 07:38:15,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:38:15,716 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-11-28 07:38:15,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:38:15,717 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-11-28 07:38:15,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:38:15,717 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:15,717 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:38:15,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-11-28 07:38:15,944 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:38:15,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:15,945 INFO L82 PathProgramCache]: Analyzing trace with hash 3327913, now seen corresponding path program 1 times [2020-11-28 07:38:15,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:38:15,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570685054] [2020-11-28 07:38:15,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:38:15,952 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:38:15,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1690342117] [2020-11-28 07:38:15,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_77fb4e42-1789-40ec-9094-bd01f31b8fe0/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:38:15,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:38:15,998 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:38:16,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:38:16,011 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:38:16,027 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:38:16,028 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:38:16,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:38:16,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:38:16 BoogieIcfgContainer [2020-11-28 07:38:16,268 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:38:16,269 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:38:16,269 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:38:16,269 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:38:16,270 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:38:15" (3/4) ... [2020-11-28 07:38:16,272 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:38:16,314 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_77fb4e42-1789-40ec-9094-bd01f31b8fe0/bin/utaipan/witness.graphml [2020-11-28 07:38:16,314 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:38:16,316 INFO L168 Benchmark]: Toolchain (without parser) took 2527.27 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 58.7 MB in the beginning and 89.5 MB in the end (delta: -30.8 MB). Peak memory consumption was 31.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:16,317 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 94.4 MB. Free memory was 69.5 MB in the beginning and 69.5 MB in the end (delta: 30.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:38:16,317 INFO L168 Benchmark]: CACSL2BoogieTranslator took 503.48 ms. Allocated memory is still 94.4 MB. Free memory was 58.6 MB in the beginning and 60.6 MB in the end (delta: -2.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:16,318 INFO L168 Benchmark]: Boogie Procedure Inliner took 83.38 ms. Allocated memory is still 94.4 MB. Free memory was 60.6 MB in the beginning and 58.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:16,318 INFO L168 Benchmark]: Boogie Preprocessor took 60.99 ms. Allocated memory is still 94.4 MB. Free memory was 58.7 MB in the beginning and 57.8 MB in the end (delta: 920.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:38:16,319 INFO L168 Benchmark]: RCFGBuilder took 802.52 ms. Allocated memory is still 94.4 MB. Free memory was 57.5 MB in the beginning and 70.1 MB in the end (delta: -12.6 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:16,320 INFO L168 Benchmark]: TraceAbstraction took 1023.96 ms. Allocated memory is still 94.4 MB. Free memory was 69.6 MB in the beginning and 31.3 MB in the end (delta: 38.3 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:16,321 INFO L168 Benchmark]: Witness Printer took 45.56 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 31.3 MB in the beginning and 89.5 MB in the end (delta: -58.2 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:16,324 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 94.4 MB. Free memory was 69.5 MB in the beginning and 69.5 MB in the end (delta: 30.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 503.48 ms. Allocated memory is still 94.4 MB. Free memory was 58.6 MB in the beginning and 60.6 MB in the end (delta: -2.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 83.38 ms. Allocated memory is still 94.4 MB. Free memory was 60.6 MB in the beginning and 58.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 60.99 ms. Allocated memory is still 94.4 MB. Free memory was 58.7 MB in the beginning and 57.8 MB in the end (delta: 920.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 802.52 ms. Allocated memory is still 94.4 MB. Free memory was 57.5 MB in the beginning and 70.1 MB in the end (delta: -12.6 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1023.96 ms. Allocated memory is still 94.4 MB. Free memory was 69.6 MB in the beginning and 31.3 MB in the end (delta: 38.3 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. * Witness Printer took 45.56 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 31.3 MB in the beginning and 89.5 MB in the end (delta: -58.2 MB). Peak memory consumption was 4.9 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: [L513] int i, j; [L514] int length = __VERIFIER_nondet_int(); [L515] COND TRUE length < 1 || length >= 2147483647 / sizeof(int) [L515] length = 1 [L516] int fac = __VERIFIER_nondet_int(); [L517] COND TRUE fac < 1 || fac >= 2147483647 / (sizeof(int) * length) [L517] fac = 1 [L518] int *arr = __builtin_alloca (length); [L519] int *arr2 = __builtin_alloca (fac*length); [L520] COND FALSE !(!arr || !arr2) [L521] i=0 [L521] COND TRUE i