./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/reverse_array_unsafe_false-valid-deref.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_158f5156-249d-4657-a5e6-7c5bce33cdbd/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_158f5156-249d-4657-a5e6-7c5bce33cdbd/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_158f5156-249d-4657-a5e6-7c5bce33cdbd/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_158f5156-249d-4657-a5e6-7c5bce33cdbd/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/reverse_array_unsafe_false-valid-deref.i -s /tmp/vcloud-vcloud-master/worker/working_dir_158f5156-249d-4657-a5e6-7c5bce33cdbd/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_158f5156-249d-4657-a5e6-7c5bce33cdbd/bin-2019/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 2b641e49e75a310172f60778d80b34a59b72d2ae .................................................................................................................................................................................................................................................................................................................................. 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 0.1.23-635dfa2 [2018-12-09 19:27:05,783 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 19:27:05,784 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 19:27:05,789 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 19:27:05,790 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 19:27:05,790 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 19:27:05,791 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 19:27:05,792 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 19:27:05,792 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 19:27:05,793 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 19:27:05,793 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 19:27:05,793 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 19:27:05,794 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 19:27:05,794 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 19:27:05,795 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 19:27:05,795 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 19:27:05,796 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 19:27:05,797 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 19:27:05,798 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 19:27:05,799 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 19:27:05,800 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 19:27:05,800 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 19:27:05,801 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 19:27:05,801 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 19:27:05,802 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 19:27:05,802 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 19:27:05,803 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 19:27:05,803 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 19:27:05,803 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 19:27:05,804 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 19:27:05,804 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 19:27:05,805 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 19:27:05,805 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 19:27:05,805 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 19:27:05,805 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 19:27:05,806 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 19:27:05,806 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_158f5156-249d-4657-a5e6-7c5bce33cdbd/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2018-12-09 19:27:05,813 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 19:27:05,813 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 19:27:05,814 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 19:27:05,814 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 19:27:05,814 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 19:27:05,814 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 19:27:05,814 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 19:27:05,814 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 19:27:05,815 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 19:27:05,815 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 19:27:05,815 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 19:27:05,815 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 19:27:05,815 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 19:27:05,815 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-09 19:27:05,815 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-09 19:27:05,816 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 19:27:05,816 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 19:27:05,816 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-09 19:27:05,816 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 19:27:05,816 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 19:27:05,816 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 19:27:05,816 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-09 19:27:05,816 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-09 19:27:05,816 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-09 19:27:05,817 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 19:27:05,817 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 19:27:05,817 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 19:27:05,817 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 19:27:05,817 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 19:27:05,817 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 19:27:05,817 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 19:27:05,817 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 19:27:05,817 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 19:27:05,818 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 19:27:05,818 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 19:27:05,818 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 19:27:05,818 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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/working_dir_158f5156-249d-4657-a5e6-7c5bce33cdbd/bin-2019/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 -> 2b641e49e75a310172f60778d80b34a59b72d2ae [2018-12-09 19:27:05,835 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 19:27:05,844 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 19:27:05,847 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 19:27:05,848 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 19:27:05,848 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 19:27:05,849 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_158f5156-249d-4657-a5e6-7c5bce33cdbd/bin-2019/utaipan/../../sv-benchmarks/c/array-memsafety/reverse_array_unsafe_false-valid-deref.i [2018-12-09 19:27:05,893 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_158f5156-249d-4657-a5e6-7c5bce33cdbd/bin-2019/utaipan/data/c13bb98d1/c9907f98d3c945feb5c8e35198fad941/FLAGbf5bdb06c [2018-12-09 19:27:06,223 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 19:27:06,223 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_158f5156-249d-4657-a5e6-7c5bce33cdbd/sv-benchmarks/c/array-memsafety/reverse_array_unsafe_false-valid-deref.i [2018-12-09 19:27:06,229 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_158f5156-249d-4657-a5e6-7c5bce33cdbd/bin-2019/utaipan/data/c13bb98d1/c9907f98d3c945feb5c8e35198fad941/FLAGbf5bdb06c [2018-12-09 19:27:06,237 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_158f5156-249d-4657-a5e6-7c5bce33cdbd/bin-2019/utaipan/data/c13bb98d1/c9907f98d3c945feb5c8e35198fad941 [2018-12-09 19:27:06,238 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 19:27:06,239 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 19:27:06,240 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 19:27:06,240 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 19:27:06,242 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 19:27:06,243 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:27:06" (1/1) ... [2018-12-09 19:27:06,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4834854b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:06, skipping insertion in model container [2018-12-09 19:27:06,245 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:27:06" (1/1) ... [2018-12-09 19:27:06,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 19:27:06,271 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 19:27:06,422 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 19:27:06,428 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 19:27:06,491 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 19:27:06,519 INFO L195 MainTranslator]: Completed translation [2018-12-09 19:27:06,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:06 WrapperNode [2018-12-09 19:27:06,520 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 19:27:06,520 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 19:27:06,520 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 19:27:06,520 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 19:27:06,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:06" (1/1) ... [2018-12-09 19:27:06,534 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:06" (1/1) ... [2018-12-09 19:27:06,539 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 19:27:06,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 19:27:06,539 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 19:27:06,539 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 19:27:06,544 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:06" (1/1) ... [2018-12-09 19:27:06,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:06" (1/1) ... [2018-12-09 19:27:06,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:06" (1/1) ... [2018-12-09 19:27:06,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:06" (1/1) ... [2018-12-09 19:27:06,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:06" (1/1) ... [2018-12-09 19:27:06,553 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:06" (1/1) ... [2018-12-09 19:27:06,554 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:06" (1/1) ... [2018-12-09 19:27:06,556 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 19:27:06,556 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 19:27:06,556 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 19:27:06,556 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 19:27:06,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:06" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_158f5156-249d-4657-a5e6-7c5bce33cdbd/bin-2019/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 [2018-12-09 19:27:06,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-09 19:27:06,588 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-09 19:27:06,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-09 19:27:06,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 19:27:06,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 19:27:06,588 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 19:27:06,588 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 19:27:06,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-09 19:27:06,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 19:27:06,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 19:27:06,757 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 19:27:06,757 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-12-09 19:27:06,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:27:06 BoogieIcfgContainer [2018-12-09 19:27:06,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 19:27:06,758 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 19:27:06,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 19:27:06,760 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 19:27:06,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:27:06" (1/3) ... [2018-12-09 19:27:06,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@322fff48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:27:06, skipping insertion in model container [2018-12-09 19:27:06,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:06" (2/3) ... [2018-12-09 19:27:06,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@322fff48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:27:06, skipping insertion in model container [2018-12-09 19:27:06,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:27:06" (3/3) ... [2018-12-09 19:27:06,762 INFO L112 eAbstractionObserver]: Analyzing ICFG reverse_array_unsafe_false-valid-deref.i [2018-12-09 19:27:06,769 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 19:27:06,774 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 21 error locations. [2018-12-09 19:27:06,783 INFO L257 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2018-12-09 19:27:06,798 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 19:27:06,799 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-09 19:27:06,799 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 19:27:06,799 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 19:27:06,799 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 19:27:06,799 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 19:27:06,799 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 19:27:06,799 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 19:27:06,808 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2018-12-09 19:27:06,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-12-09 19:27:06,813 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:27:06,813 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:27:06,815 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr9REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr20ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION]=== [2018-12-09 19:27:06,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:27:06,818 INFO L82 PathProgramCache]: Analyzing trace with hash 388911071, now seen corresponding path program 1 times [2018-12-09 19:27:06,819 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:27:06,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:27:06,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:27:06,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:27:06,847 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:27:06,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:27:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:27:06,913 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:27:06,913 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 19:27:06,913 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 19:27:06,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 19:27:06,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 19:27:06,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 19:27:06,925 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 3 states. [2018-12-09 19:27:06,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:27:06,985 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2018-12-09 19:27:06,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 19:27:06,986 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-12-09 19:27:06,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:27:06,992 INFO L225 Difference]: With dead ends: 54 [2018-12-09 19:27:06,992 INFO L226 Difference]: Without dead ends: 51 [2018-12-09 19:27:06,993 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 19:27:07,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-12-09 19:27:07,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-12-09 19:27:07,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-12-09 19:27:07,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2018-12-09 19:27:07,017 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 11 [2018-12-09 19:27:07,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:27:07,018 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2018-12-09 19:27:07,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 19:27:07,018 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2018-12-09 19:27:07,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-12-09 19:27:07,018 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:27:07,018 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:27:07,018 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr9REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr20ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION]=== [2018-12-09 19:27:07,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:27:07,019 INFO L82 PathProgramCache]: Analyzing trace with hash 388911072, now seen corresponding path program 1 times [2018-12-09 19:27:07,019 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:27:07,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:27:07,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:27:07,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:27:07,020 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:27:07,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:27:07,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:27:07,061 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:27:07,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 19:27:07,061 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 19:27:07,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 19:27:07,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 19:27:07,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-09 19:27:07,063 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 4 states. [2018-12-09 19:27:07,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:27:07,097 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2018-12-09 19:27:07,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 19:27:07,098 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2018-12-09 19:27:07,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:27:07,098 INFO L225 Difference]: With dead ends: 62 [2018-12-09 19:27:07,098 INFO L226 Difference]: Without dead ends: 62 [2018-12-09 19:27:07,099 INFO L631 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 [2018-12-09 19:27:07,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-12-09 19:27:07,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2018-12-09 19:27:07,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-12-09 19:27:07,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2018-12-09 19:27:07,102 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 11 [2018-12-09 19:27:07,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:27:07,102 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2018-12-09 19:27:07,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 19:27:07,102 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2018-12-09 19:27:07,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-12-09 19:27:07,102 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:27:07,103 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:27:07,103 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr9REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr20ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION]=== [2018-12-09 19:27:07,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:27:07,103 INFO L82 PathProgramCache]: Analyzing trace with hash 388911113, now seen corresponding path program 1 times [2018-12-09 19:27:07,103 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:27:07,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:27:07,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:27:07,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:27:07,104 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:27:07,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 19:27:07,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 19:27:07,132 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-09 19:27:07,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:27:07 BoogieIcfgContainer [2018-12-09 19:27:07,146 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 19:27:07,146 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 19:27:07,146 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 19:27:07,146 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 19:27:07,146 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:27:06" (3/4) ... [2018-12-09 19:27:07,148 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-09 19:27:07,171 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_158f5156-249d-4657-a5e6-7c5bce33cdbd/bin-2019/utaipan/witness.graphml [2018-12-09 19:27:07,171 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 19:27:07,172 INFO L168 Benchmark]: Toolchain (without parser) took 933.04 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 103.3 MB). Free memory was 948.1 MB in the beginning and 1.0 GB in the end (delta: -64.2 MB). Peak memory consumption was 39.1 MB. Max. memory is 11.5 GB. [2018-12-09 19:27:07,173 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 19:27:07,173 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.15 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 103.3 MB). Free memory was 948.1 MB in the beginning and 1.1 GB in the end (delta: -138.0 MB). Peak memory consumption was 25.9 MB. Max. memory is 11.5 GB. [2018-12-09 19:27:07,173 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.78 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 19:27:07,173 INFO L168 Benchmark]: Boogie Preprocessor took 16.63 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 19:27:07,173 INFO L168 Benchmark]: RCFGBuilder took 201.91 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 26.6 MB). Peak memory consumption was 26.6 MB. Max. memory is 11.5 GB. [2018-12-09 19:27:07,174 INFO L168 Benchmark]: TraceAbstraction took 387.56 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 47.2 MB). Peak memory consumption was 47.2 MB. Max. memory is 11.5 GB. [2018-12-09 19:27:07,174 INFO L168 Benchmark]: Witness Printer took 25.48 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 19:27:07,176 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 280.15 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 103.3 MB). Free memory was 948.1 MB in the beginning and 1.1 GB in the end (delta: -138.0 MB). Peak memory consumption was 25.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 18.78 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.63 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 201.91 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 26.6 MB). Peak memory consumption was 26.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 387.56 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 47.2 MB). Peak memory consumption was 47.2 MB. Max. memory is 11.5 GB. * Witness Printer took 25.48 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 547]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L541] int i, j, tmp; [L542] int length = __VERIFIER_nondet_int(); [L543] COND TRUE length < 1 [L543] length = 1 VAL [length=1] [L544] COND FALSE !(length % 2 == 0) VAL [length=1] [L545] int *arr = __builtin_alloca (length); [L546] i=0 VAL [__builtin_alloca (length)={3:0}, arr={3:0}, i=0, length=1] [L546] COND TRUE i