./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/ldv-regression/recursive_list_true-termination.c_false-unreach-call.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_aba9ff40-1955-4149-a209-a473e87fc16c/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_aba9ff40-1955-4149-a209-a473e87fc16c/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_aba9ff40-1955-4149-a209-a473e87fc16c/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_aba9ff40-1955-4149-a209-a473e87fc16c/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/recursive_list_true-termination.c_false-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_aba9ff40-1955-4149-a209-a473e87fc16c/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_aba9ff40-1955-4149-a209-a473e87fc16c/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3d5040117e2eabdebb8b19ac037d1eb680a830cf .................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 14:07:02,881 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 14:07:02,882 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 14:07:02,888 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 14:07:02,889 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 14:07:02,889 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 14:07:02,890 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 14:07:02,891 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 14:07:02,892 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 14:07:02,893 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 14:07:02,894 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 14:07:02,894 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 14:07:02,894 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 14:07:02,895 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 14:07:02,896 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 14:07:02,896 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 14:07:02,896 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 14:07:02,897 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 14:07:02,899 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 14:07:02,899 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 14:07:02,900 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 14:07:02,901 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 14:07:02,903 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 14:07:02,903 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 14:07:02,903 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 14:07:02,903 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 14:07:02,904 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 14:07:02,904 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 14:07:02,905 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 14:07:02,906 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 14:07:02,906 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 14:07:02,906 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 14:07:02,906 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 14:07:02,906 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 14:07:02,907 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 14:07:02,907 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 14:07:02,907 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_aba9ff40-1955-4149-a209-a473e87fc16c/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-18 14:07:02,917 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 14:07:02,917 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 14:07:02,918 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 14:07:02,918 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 14:07:02,918 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 14:07:02,919 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 14:07:02,919 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 14:07:02,919 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 14:07:02,919 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 14:07:02,919 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 14:07:02,919 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 14:07:02,919 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 14:07:02,919 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 14:07:02,920 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 14:07:02,920 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 14:07:02,920 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 14:07:02,920 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 14:07:02,920 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 14:07:02,921 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 14:07:02,921 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 14:07:02,921 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 14:07:02,921 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 14:07:02,921 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 14:07:02,921 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 14:07:02,921 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 14:07:02,922 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 14:07:02,922 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 14:07:02,922 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 14:07:02,922 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 14:07:02,922 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 14:07:02,922 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 14:07:02,922 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 14:07:02,922 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 14:07:02,923 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 14:07:02,923 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 14:07:02,923 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 14:07:02,923 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 14:07:02,923 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_aba9ff40-1955-4149-a209-a473e87fc16c/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 ! call(__VERIFIER_error())) ) 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 -> 3d5040117e2eabdebb8b19ac037d1eb680a830cf [2018-11-18 14:07:02,947 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 14:07:02,956 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 14:07:02,958 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 14:07:02,960 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 14:07:02,960 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 14:07:02,960 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_aba9ff40-1955-4149-a209-a473e87fc16c/bin-2019/utaipan/../../sv-benchmarks/c/ldv-regression/recursive_list_true-termination.c_false-unreach-call.i [2018-11-18 14:07:03,003 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_aba9ff40-1955-4149-a209-a473e87fc16c/bin-2019/utaipan/data/2ec9247c3/807c994fe1004df0aab9cd22a1195efd/FLAG977d53561 [2018-11-18 14:07:03,404 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 14:07:03,404 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_aba9ff40-1955-4149-a209-a473e87fc16c/sv-benchmarks/c/ldv-regression/recursive_list_true-termination.c_false-unreach-call.i [2018-11-18 14:07:03,409 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_aba9ff40-1955-4149-a209-a473e87fc16c/bin-2019/utaipan/data/2ec9247c3/807c994fe1004df0aab9cd22a1195efd/FLAG977d53561 [2018-11-18 14:07:03,419 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_aba9ff40-1955-4149-a209-a473e87fc16c/bin-2019/utaipan/data/2ec9247c3/807c994fe1004df0aab9cd22a1195efd [2018-11-18 14:07:03,421 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 14:07:03,422 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 14:07:03,422 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 14:07:03,422 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 14:07:03,424 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 14:07:03,425 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 02:07:03" (1/1) ... [2018-11-18 14:07:03,427 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ec7e158 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:07:03, skipping insertion in model container [2018-11-18 14:07:03,427 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 02:07:03" (1/1) ... [2018-11-18 14:07:03,434 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 14:07:03,449 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 14:07:03,553 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 14:07:03,559 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 14:07:03,570 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 14:07:03,579 INFO L195 MainTranslator]: Completed translation [2018-11-18 14:07:03,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:07:03 WrapperNode [2018-11-18 14:07:03,580 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 14:07:03,580 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 14:07:03,580 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 14:07:03,580 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 14:07:03,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:07:03" (1/1) ... [2018-11-18 14:07:03,590 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:07:03" (1/1) ... [2018-11-18 14:07:03,594 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 14:07:03,595 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 14:07:03,595 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 14:07:03,595 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 14:07:03,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:07:03" (1/1) ... [2018-11-18 14:07:03,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:07:03" (1/1) ... [2018-11-18 14:07:03,601 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:07:03" (1/1) ... [2018-11-18 14:07:03,601 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:07:03" (1/1) ... [2018-11-18 14:07:03,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:07:03" (1/1) ... [2018-11-18 14:07:03,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:07:03" (1/1) ... [2018-11-18 14:07:03,608 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:07:03" (1/1) ... [2018-11-18 14:07:03,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 14:07:03,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 14:07:03,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 14:07:03,609 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 14:07:03,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:07:03" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_aba9ff40-1955-4149-a209-a473e87fc16c/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 [2018-11-18 14:07:03,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-11-18 14:07:03,678 INFO L130 BoogieDeclarations]: Found specification of procedure err [2018-11-18 14:07:03,678 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2018-11-18 14:07:03,678 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 14:07:03,678 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 14:07:03,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-11-18 14:07:03,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-18 14:07:03,678 INFO L130 BoogieDeclarations]: Found specification of procedure allocate_memory [2018-11-18 14:07:03,678 INFO L138 BoogieDeclarations]: Found implementation of procedure allocate_memory [2018-11-18 14:07:03,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 14:07:03,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 14:07:03,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-18 14:07:03,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 14:07:03,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 14:07:03,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-18 14:07:03,679 INFO L130 BoogieDeclarations]: Found specification of procedure append [2018-11-18 14:07:03,679 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2018-11-18 14:07:03,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-18 14:07:03,792 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 14:07:03,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:07:03 BoogieIcfgContainer [2018-11-18 14:07:03,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 14:07:03,793 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 14:07:03,794 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 14:07:03,796 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 14:07:03,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 02:07:03" (1/3) ... [2018-11-18 14:07:03,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52c18a84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 02:07:03, skipping insertion in model container [2018-11-18 14:07:03,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:07:03" (2/3) ... [2018-11-18 14:07:03,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52c18a84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 02:07:03, skipping insertion in model container [2018-11-18 14:07:03,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:07:03" (3/3) ... [2018-11-18 14:07:03,799 INFO L112 eAbstractionObserver]: Analyzing ICFG recursive_list_true-termination.c_false-unreach-call.i [2018-11-18 14:07:03,807 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 14:07:03,813 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 14:07:03,826 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 14:07:03,852 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 14:07:03,852 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 14:07:03,852 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 14:07:03,852 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 14:07:03,852 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 14:07:03,852 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 14:07:03,852 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 14:07:03,852 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 14:07:03,866 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2018-11-18 14:07:03,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-18 14:07:03,871 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:07:03,872 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:07:03,873 INFO L423 AbstractCegarLoop]: === Iteration 1 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 14:07:03,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:07:03,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1107831234, now seen corresponding path program 1 times [2018-11-18 14:07:03,880 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:07:03,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:07:03,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:07:03,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:07:03,918 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:07:03,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 14:07:04,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 14:07:04,039 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-18 14:07:04,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 02:07:04 BoogieIcfgContainer [2018-11-18 14:07:04,066 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 14:07:04,066 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 14:07:04,067 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 14:07:04,067 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 14:07:04,067 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:07:03" (3/4) ... [2018-11-18 14:07:04,069 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-18 14:07:04,108 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_aba9ff40-1955-4149-a209-a473e87fc16c/bin-2019/utaipan/witness.graphml [2018-11-18 14:07:04,108 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 14:07:04,109 INFO L168 Benchmark]: Toolchain (without parser) took 687.70 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 150.5 MB). Free memory was 959.2 MB in the beginning and 1.1 GB in the end (delta: -142.4 MB). Peak memory consumption was 8.0 MB. Max. memory is 11.5 GB. [2018-11-18 14:07:04,110 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 14:07:04,111 INFO L168 Benchmark]: CACSL2BoogieTranslator took 157.66 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 14:07:04,111 INFO L168 Benchmark]: Boogie Procedure Inliner took 14.35 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 14:07:04,111 INFO L168 Benchmark]: Boogie Preprocessor took 14.14 ms. Allocated memory is still 1.0 GB. Free memory is still 945.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 14:07:04,111 INFO L168 Benchmark]: RCFGBuilder took 183.88 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 150.5 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -184.4 MB). Peak memory consumption was 17.6 MB. Max. memory is 11.5 GB. [2018-11-18 14:07:04,112 INFO L168 Benchmark]: TraceAbstraction took 272.70 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.1 MB). Peak memory consumption was 25.1 MB. Max. memory is 11.5 GB. [2018-11-18 14:07:04,112 INFO L168 Benchmark]: Witness Printer took 41.97 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2018-11-18 14:07:04,115 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 157.66 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 14.35 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.14 ms. Allocated memory is still 1.0 GB. Free memory is still 945.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 183.88 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 150.5 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -184.4 MB). Peak memory consumption was 17.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 272.70 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.1 MB). Peak memory consumption was 25.1 MB. Max. memory is 11.5 GB. * Witness Printer took 41.97 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int i = 1; VAL [\old(i)=12, i=1] [L37] struct list *l,m; [L38] l = &m [L39] FCALL l->next = 0 [L40] FCALL l->n = 0 VAL [i=1, l={11:0}, m={11:0}] [L42] CALL, EXPR append(l, 1) VAL [\old(n)=1, i=1, l={11:0}] [L25] struct list *new_el; VAL [\old(n)=1, i=1, l={11:0}, l={11:0}, n=1] [L27] CALL, EXPR allocate_memory() VAL [i=1] [L20] EXPR, FCALL malloc(8U) [L20] RET return malloc(8U); VAL [\result={10:0}, i=1, malloc(8U)={10:0}] [L27] EXPR allocate_memory() VAL [\old(n)=1, allocate_memory()={10:0}, i=1, l={11:0}, l={11:0}, n=1] [L27] new_el = allocate_memory() [L29] FCALL new_el->n = n [L30] FCALL new_el->next = l [L32] RET return new_el; VAL [\old(n)=1, \result={10:0}, i=1, l={11:0}, l={11:0}, n=1, new_el={10:0}] [L42] EXPR append(l, 1) VAL [append(l, 1)={10:0}, i=1, l={11:0}, m={11:0}] [L42] l = append(l, 1) [L43] CALL, EXPR append(l, 2) VAL [\old(n)=2, i=1, l={10:0}] [L25] struct list *new_el; VAL [\old(n)=2, i=1, l={10:0}, l={10:0}, n=2] [L27] CALL, EXPR allocate_memory() VAL [i=1] [L20] EXPR, FCALL malloc(8U) [L20] RET return malloc(8U); VAL [\result={13:0}, i=1, malloc(8U)={13:0}] [L27] EXPR allocate_memory() VAL [\old(n)=2, allocate_memory()={13:0}, i=1, l={10:0}, l={10:0}, n=2] [L27] new_el = allocate_memory() [L29] FCALL new_el->n = n [L30] FCALL new_el->next = l [L32] RET return new_el; VAL [\old(n)=2, \result={13:0}, i=1, l={10:0}, l={10:0}, n=2, new_el={13:0}] [L43] EXPR append(l, 2) VAL [append(l, 2)={13:0}, i=1, l={10:0}, m={11:0}] [L43] l = append(l, 2) [L48] EXPR, FCALL l->next [L48] EXPR, FCALL l->next->next [L48] EXPR, FCALL l->next->next->n VAL [i=1, l={13:0}, l->next={10:0}, l->next->next={11:0}, l->next->next->n=0, m={11:0}] [L48] COND TRUE l->next->next->n == 0 [L48] CALL err() VAL [i=1] [L8] __VERIFIER_error() VAL [i=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 29 locations, 1 error locations. UNSAFE Result, 0.2s OverallTime, 1 OverallIterations, 2 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 29 NumberOfCodeBlocks, 29 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...