./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/naturalNumbers1_false-valid-deref.c --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_3c6fd252-0b24-4fef-a155-77b25a98f20e/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_3c6fd252-0b24-4fef-a155-77b25a98f20e/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_3c6fd252-0b24-4fef-a155-77b25a98f20e/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_3c6fd252-0b24-4fef-a155-77b25a98f20e/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/naturalNumbers1_false-valid-deref.c -s /tmp/vcloud-vcloud-master/worker/working_dir_3c6fd252-0b24-4fef-a155-77b25a98f20e/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_3c6fd252-0b24-4fef-a155-77b25a98f20e/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 932f76685ed1816d93a388d0ab1addae9c51483a .............................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-09 01:21:06,090 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 01:21:06,091 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 01:21:06,099 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 01:21:06,099 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 01:21:06,100 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 01:21:06,100 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 01:21:06,101 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 01:21:06,102 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 01:21:06,103 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 01:21:06,104 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 01:21:06,104 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 01:21:06,105 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 01:21:06,105 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 01:21:06,106 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 01:21:06,107 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 01:21:06,107 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 01:21:06,108 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 01:21:06,110 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 01:21:06,111 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 01:21:06,111 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 01:21:06,112 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 01:21:06,114 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 01:21:06,114 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 01:21:06,114 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 01:21:06,115 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 01:21:06,115 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 01:21:06,116 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 01:21:06,116 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 01:21:06,117 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 01:21:06,117 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 01:21:06,118 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 01:21:06,118 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 01:21:06,118 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 01:21:06,119 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 01:21:06,119 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 01:21:06,119 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_3c6fd252-0b24-4fef-a155-77b25a98f20e/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2018-12-09 01:21:06,130 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 01:21:06,130 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 01:21:06,130 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 01:21:06,131 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 01:21:06,131 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 01:21:06,131 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 01:21:06,131 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 01:21:06,131 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 01:21:06,131 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 01:21:06,131 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 01:21:06,131 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 01:21:06,131 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 01:21:06,132 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 01:21:06,132 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-09 01:21:06,132 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-09 01:21:06,132 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 01:21:06,132 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 01:21:06,133 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-09 01:21:06,133 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 01:21:06,133 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 01:21:06,133 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 01:21:06,133 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-09 01:21:06,133 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-09 01:21:06,133 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-09 01:21:06,133 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 01:21:06,134 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 01:21:06,134 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 01:21:06,134 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 01:21:06,134 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 01:21:06,134 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 01:21:06,134 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 01:21:06,134 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 01:21:06,134 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 01:21:06,134 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 01:21:06,134 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 01:21:06,134 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 01:21:06,135 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_3c6fd252-0b24-4fef-a155-77b25a98f20e/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 -> 932f76685ed1816d93a388d0ab1addae9c51483a [2018-12-09 01:21:06,156 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 01:21:06,165 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 01:21:06,168 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 01:21:06,169 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 01:21:06,170 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 01:21:06,170 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_3c6fd252-0b24-4fef-a155-77b25a98f20e/bin-2019/utaipan/../../sv-benchmarks/c/memsafety-ext3/naturalNumbers1_false-valid-deref.c [2018-12-09 01:21:06,213 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3c6fd252-0b24-4fef-a155-77b25a98f20e/bin-2019/utaipan/data/948003179/c00f43f965d343eb89f64dbf56a4328d/FLAGdca1453a5 [2018-12-09 01:21:06,509 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 01:21:06,509 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_3c6fd252-0b24-4fef-a155-77b25a98f20e/sv-benchmarks/c/memsafety-ext3/naturalNumbers1_false-valid-deref.c [2018-12-09 01:21:06,513 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3c6fd252-0b24-4fef-a155-77b25a98f20e/bin-2019/utaipan/data/948003179/c00f43f965d343eb89f64dbf56a4328d/FLAGdca1453a5 [2018-12-09 01:21:06,521 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_3c6fd252-0b24-4fef-a155-77b25a98f20e/bin-2019/utaipan/data/948003179/c00f43f965d343eb89f64dbf56a4328d [2018-12-09 01:21:06,523 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 01:21:06,524 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 01:21:06,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 01:21:06,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 01:21:06,527 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 01:21:06,527 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 01:21:06" (1/1) ... [2018-12-09 01:21:06,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bf82b32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:21:06, skipping insertion in model container [2018-12-09 01:21:06,529 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 01:21:06" (1/1) ... [2018-12-09 01:21:06,533 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 01:21:06,543 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 01:21:06,640 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 01:21:06,646 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 01:21:06,656 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 01:21:06,665 INFO L195 MainTranslator]: Completed translation [2018-12-09 01:21:06,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:21:06 WrapperNode [2018-12-09 01:21:06,665 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 01:21:06,666 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 01:21:06,666 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 01:21:06,666 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 01:21:06,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:21:06" (1/1) ... [2018-12-09 01:21:06,675 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:21:06" (1/1) ... [2018-12-09 01:21:06,679 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 01:21:06,680 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 01:21:06,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 01:21:06,680 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 01:21:06,712 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:21:06" (1/1) ... [2018-12-09 01:21:06,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:21:06" (1/1) ... [2018-12-09 01:21:06,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:21:06" (1/1) ... [2018-12-09 01:21:06,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:21:06" (1/1) ... [2018-12-09 01:21:06,718 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:21:06" (1/1) ... [2018-12-09 01:21:06,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:21:06" (1/1) ... [2018-12-09 01:21:06,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:21:06" (1/1) ... [2018-12-09 01:21:06,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 01:21:06,723 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 01:21:06,723 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 01:21:06,723 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 01:21:06,723 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:21:06" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3c6fd252-0b24-4fef-a155-77b25a98f20e/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 01:21:06,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 01:21:06,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 01:21:06,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-09 01:21:06,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 01:21:06,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 01:21:06,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2018-12-09 01:21:06,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-09 01:21:06,755 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 01:21:06,755 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 01:21:06,755 INFO L130 BoogieDeclarations]: Found specification of procedure areNatural [2018-12-09 01:21:06,755 INFO L138 BoogieDeclarations]: Found implementation of procedure areNatural [2018-12-09 01:21:06,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-09 01:21:06,851 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 01:21:06,852 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-09 01:21:06,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 01:21:06 BoogieIcfgContainer [2018-12-09 01:21:06,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 01:21:06,852 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 01:21:06,852 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 01:21:06,854 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 01:21:06,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 01:21:06" (1/3) ... [2018-12-09 01:21:06,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d0d21a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 01:21:06, skipping insertion in model container [2018-12-09 01:21:06,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:21:06" (2/3) ... [2018-12-09 01:21:06,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d0d21a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 01:21:06, skipping insertion in model container [2018-12-09 01:21:06,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 01:21:06" (3/3) ... [2018-12-09 01:21:06,856 INFO L112 eAbstractionObserver]: Analyzing ICFG naturalNumbers1_false-valid-deref.c [2018-12-09 01:21:06,863 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 01:21:06,868 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-12-09 01:21:06,878 INFO L257 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2018-12-09 01:21:06,893 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 01:21:06,893 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-09 01:21:06,893 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 01:21:06,893 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 01:21:06,893 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 01:21:06,893 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 01:21:06,893 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 01:21:06,893 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 01:21:06,901 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-12-09 01:21:06,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-09 01:21:06,906 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 01:21:06,906 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 01:21:06,907 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, areNaturalErr1REQUIRES_VIOLATION, areNaturalErr0REQUIRES_VIOLATION]=== [2018-12-09 01:21:06,910 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 01:21:06,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1845664052, now seen corresponding path program 1 times [2018-12-09 01:21:06,912 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 01:21:06,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 01:21:06,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 01:21:06,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 01:21:06,939 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 01:21:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 01:21:07,011 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 01:21:07,013 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 01:21:07,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 01:21:07,013 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 01:21:07,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 01:21:07,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 01:21:07,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 01:21:07,025 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states. [2018-12-09 01:21:07,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 01:21:07,071 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-12-09 01:21:07,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 01:21:07,072 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-12-09 01:21:07,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 01:21:07,077 INFO L225 Difference]: With dead ends: 21 [2018-12-09 01:21:07,077 INFO L226 Difference]: Without dead ends: 18 [2018-12-09 01:21:07,078 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-09 01:21:07,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-12-09 01:21:07,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-12-09 01:21:07,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-09 01:21:07,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-12-09 01:21:07,100 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 10 [2018-12-09 01:21:07,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 01:21:07,100 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-12-09 01:21:07,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 01:21:07,100 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-12-09 01:21:07,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-09 01:21:07,100 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 01:21:07,100 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 01:21:07,100 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, areNaturalErr1REQUIRES_VIOLATION, areNaturalErr0REQUIRES_VIOLATION]=== [2018-12-09 01:21:07,101 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 01:21:07,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1845664051, now seen corresponding path program 1 times [2018-12-09 01:21:07,101 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 01:21:07,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 01:21:07,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 01:21:07,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 01:21:07,102 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 01:21:07,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 01:21:07,170 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 01:21:07,171 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 01:21:07,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 01:21:07,171 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 01:21:07,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 01:21:07,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 01:21:07,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 01:21:07,172 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2018-12-09 01:21:07,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 01:21:07,215 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2018-12-09 01:21:07,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 01:21:07,215 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-12-09 01:21:07,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 01:21:07,217 INFO L225 Difference]: With dead ends: 23 [2018-12-09 01:21:07,217 INFO L226 Difference]: Without dead ends: 23 [2018-12-09 01:21:07,217 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-09 01:21:07,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-09 01:21:07,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2018-12-09 01:21:07,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-09 01:21:07,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-12-09 01:21:07,220 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 10 [2018-12-09 01:21:07,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 01:21:07,220 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-12-09 01:21:07,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 01:21:07,220 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-12-09 01:21:07,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-09 01:21:07,220 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 01:21:07,220 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 01:21:07,220 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, areNaturalErr1REQUIRES_VIOLATION, areNaturalErr0REQUIRES_VIOLATION]=== [2018-12-09 01:21:07,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 01:21:07,221 INFO L82 PathProgramCache]: Analyzing trace with hash -6453934, now seen corresponding path program 1 times [2018-12-09 01:21:07,221 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 01:21:07,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 01:21:07,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 01:21:07,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 01:21:07,222 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 01:21:07,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 01:21:07,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 01:21:07,300 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 01:21:07,300 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 01:21:07,300 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2018-12-09 01:21:07,301 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [10], [19], [20], [22], [26], [32], [33], [34], [36] [2018-12-09 01:21:07,321 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 01:21:07,321 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 01:21:07,437 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 01:21:07,438 INFO L272 AbstractInterpreter]: Visited 12 different actions 28 times. Merged at 4 different actions 16 times. Never widened. Performed 216 root evaluator evaluations with a maximum evaluation depth of 4. Performed 216 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 17 variables. [2018-12-09 01:21:07,444 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 01:21:07,444 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 01:21:07,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 01:21:07,445 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3c6fd252-0b24-4fef-a155-77b25a98f20e/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 01:21:07,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 01:21:07,451 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 01:21:07,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 01:21:07,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 01:21:07,520 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2018-12-09 01:21:07,522 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2018-12-09 01:21:07,523 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-09 01:21:07,524 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 01:21:07,525 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-09 01:21:07,525 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2018-12-09 01:21:07,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 01:21:07,533 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 01:21:07,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 01:21:07,592 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-09 01:21:07,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [6] total 14 [2018-12-09 01:21:07,592 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 01:21:07,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 01:21:07,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 01:21:07,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2018-12-09 01:21:07,593 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2018-12-09 01:21:07,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 01:21:07,630 INFO L93 Difference]: Finished difference Result 16 states and 15 transitions. [2018-12-09 01:21:07,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 01:21:07,630 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-12-09 01:21:07,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 01:21:07,631 INFO L225 Difference]: With dead ends: 16 [2018-12-09 01:21:07,631 INFO L226 Difference]: Without dead ends: 16 [2018-12-09 01:21:07,632 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2018-12-09 01:21:07,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-12-09 01:21:07,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-12-09 01:21:07,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-12-09 01:21:07,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 15 transitions. [2018-12-09 01:21:07,633 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 15 transitions. Word has length 13 [2018-12-09 01:21:07,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 01:21:07,634 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 15 transitions. [2018-12-09 01:21:07,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 01:21:07,634 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 15 transitions. [2018-12-09 01:21:07,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-12-09 01:21:07,634 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 01:21:07,634 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 01:21:07,635 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, areNaturalErr1REQUIRES_VIOLATION, areNaturalErr0REQUIRES_VIOLATION]=== [2018-12-09 01:21:07,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 01:21:07,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1907814666, now seen corresponding path program 1 times [2018-12-09 01:21:07,635 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 01:21:07,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 01:21:07,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 01:21:07,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 01:21:07,636 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 01:21:07,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 01:21:07,666 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 01:21:07,666 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 01:21:07,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-09 01:21:07,667 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 01:21:07,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 01:21:07,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 01:21:07,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 01:21:07,667 INFO L87 Difference]: Start difference. First operand 16 states and 15 transitions. Second operand 4 states. [2018-12-09 01:21:07,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 01:21:07,683 INFO L93 Difference]: Finished difference Result 15 states and 14 transitions. [2018-12-09 01:21:07,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 01:21:07,683 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-12-09 01:21:07,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 01:21:07,684 INFO L225 Difference]: With dead ends: 15 [2018-12-09 01:21:07,684 INFO L226 Difference]: Without dead ends: 0 [2018-12-09 01:21:07,684 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 01:21:07,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-09 01:21:07,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-09 01:21:07,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-09 01:21:07,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-09 01:21:07,685 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2018-12-09 01:21:07,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 01:21:07,685 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 01:21:07,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 01:21:07,685 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-09 01:21:07,686 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-09 01:21:07,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 01:21:07 BoogieIcfgContainer [2018-12-09 01:21:07,689 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 01:21:07,689 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 01:21:07,690 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 01:21:07,690 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 01:21:07,690 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 01:21:06" (3/4) ... [2018-12-09 01:21:07,692 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-09 01:21:07,696 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-09 01:21:07,696 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-09 01:21:07,696 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure areNatural [2018-12-09 01:21:07,699 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2018-12-09 01:21:07,699 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2018-12-09 01:21:07,699 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-09 01:21:07,699 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-09 01:21:07,699 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-09 01:21:07,726 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_3c6fd252-0b24-4fef-a155-77b25a98f20e/bin-2019/utaipan/witness.graphml [2018-12-09 01:21:07,726 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 01:21:07,726 INFO L168 Benchmark]: Toolchain (without parser) took 1202.61 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 94.4 MB). Free memory was 958.8 MB in the beginning and 930.5 MB in the end (delta: 28.3 MB). Peak memory consumption was 122.7 MB. Max. memory is 11.5 GB. [2018-12-09 01:21:07,727 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 01:21:07,727 INFO L168 Benchmark]: CACSL2BoogieTranslator took 140.98 ms. Allocated memory is still 1.0 GB. Free memory was 958.8 MB in the beginning and 948.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-09 01:21:07,728 INFO L168 Benchmark]: Boogie Procedure Inliner took 13.68 ms. Allocated memory is still 1.0 GB. Free memory is still 948.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 01:21:07,728 INFO L168 Benchmark]: Boogie Preprocessor took 42.96 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 94.4 MB). Free memory was 948.1 MB in the beginning and 1.1 GB in the end (delta: -135.8 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2018-12-09 01:21:07,729 INFO L168 Benchmark]: RCFGBuilder took 129.24 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: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 11.5 GB. [2018-12-09 01:21:07,729 INFO L168 Benchmark]: TraceAbstraction took 836.82 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 941.2 MB in the end (delta: 130.7 MB). Peak memory consumption was 130.7 MB. Max. memory is 11.5 GB. [2018-12-09 01:21:07,729 INFO L168 Benchmark]: Witness Printer took 36.28 ms. Allocated memory is still 1.1 GB. Free memory was 941.2 MB in the beginning and 930.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-09 01:21:07,732 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 140.98 ms. Allocated memory is still 1.0 GB. Free memory was 958.8 MB in the beginning and 948.1 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 13.68 ms. Allocated memory is still 1.0 GB. Free memory is still 948.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 42.96 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 94.4 MB). Free memory was 948.1 MB in the beginning and 1.1 GB in the end (delta: -135.8 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 129.24 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: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 836.82 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 941.2 MB in the end (delta: 130.7 MB). Peak memory consumption was 130.7 MB. Max. memory is 11.5 GB. * Witness Printer took 36.28 ms. Allocated memory is still 1.1 GB. Free memory was 941.2 MB in the beginning and 930.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 4]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 4]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 3 error locations. SAFE Result, 0.8s OverallTime, 4 OverallIterations, 2 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 47 SDtfs, 43 SDslu, 81 SDs, 0 SdLazy, 94 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 61 NumberOfCodeBlocks, 61 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 68 ConstructedInterpolants, 0 QuantifiedInterpolants, 3692 SizeOfPredicates, 7 NumberOfNonLiveVariables, 76 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 6 InterpolantComputations, 5 PerfectInterpolantSequences, 4/6 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...