./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 aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_a7936379-7609-4415-89de-43f367ce81f1/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_a7936379-7609-4415-89de-43f367ce81f1/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_a7936379-7609-4415-89de-43f367ce81f1/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_a7936379-7609-4415-89de-43f367ce81f1/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_a7936379-7609-4415-89de-43f367ce81f1/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_a7936379-7609-4415-89de-43f367ce81f1/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-aa41828 [2018-11-23 04:28:17,587 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 04:28:17,588 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 04:28:17,596 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 04:28:17,596 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 04:28:17,596 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 04:28:17,597 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 04:28:17,598 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 04:28:17,599 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 04:28:17,600 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 04:28:17,601 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 04:28:17,601 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 04:28:17,601 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 04:28:17,602 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 04:28:17,603 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 04:28:17,603 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 04:28:17,604 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 04:28:17,605 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 04:28:17,607 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 04:28:17,608 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 04:28:17,608 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 04:28:17,609 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 04:28:17,611 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 04:28:17,611 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 04:28:17,611 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 04:28:17,612 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 04:28:17,612 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 04:28:17,613 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 04:28:17,614 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 04:28:17,614 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 04:28:17,614 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 04:28:17,615 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 04:28:17,615 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 04:28:17,615 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 04:28:17,616 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 04:28:17,616 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 04:28:17,617 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_a7936379-7609-4415-89de-43f367ce81f1/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2018-11-23 04:28:17,627 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 04:28:17,627 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 04:28:17,628 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-23 04:28:17,628 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-23 04:28:17,628 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-23 04:28:17,628 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-23 04:28:17,628 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-23 04:28:17,628 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-23 04:28:17,629 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-23 04:28:17,629 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-23 04:28:17,629 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-23 04:28:17,629 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-23 04:28:17,629 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-23 04:28:17,630 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-23 04:28:17,630 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-23 04:28:17,630 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 04:28:17,630 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 04:28:17,630 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-23 04:28:17,630 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 04:28:17,631 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 04:28:17,631 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 04:28:17,631 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-11-23 04:28:17,631 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-11-23 04:28:17,631 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-11-23 04:28:17,631 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-23 04:28:17,631 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 04:28:17,631 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 04:28:17,632 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 04:28:17,632 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 04:28:17,632 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-23 04:28:17,632 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-23 04:28:17,632 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 04:28:17,632 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 04:28:17,632 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-23 04:28:17,633 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-23 04:28:17,633 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-23 04:28:17,633 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-23 04:28:17,633 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_a7936379-7609-4415-89de-43f367ce81f1/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 [2018-11-23 04:28:17,656 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 04:28:17,664 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 04:28:17,666 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 04:28:17,667 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 04:28:17,667 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 04:28:17,668 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_a7936379-7609-4415-89de-43f367ce81f1/bin-2019/utaipan/../../sv-benchmarks/c/memsafety-ext3/naturalNumbers1_false-valid-deref.c [2018-11-23 04:28:17,704 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a7936379-7609-4415-89de-43f367ce81f1/bin-2019/utaipan/data/1aa0902d4/3103f25ae1a04b889912d0765ec3df89/FLAG6e259b473 [2018-11-23 04:28:18,093 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 04:28:18,094 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_a7936379-7609-4415-89de-43f367ce81f1/sv-benchmarks/c/memsafety-ext3/naturalNumbers1_false-valid-deref.c [2018-11-23 04:28:18,097 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a7936379-7609-4415-89de-43f367ce81f1/bin-2019/utaipan/data/1aa0902d4/3103f25ae1a04b889912d0765ec3df89/FLAG6e259b473 [2018-11-23 04:28:18,106 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_a7936379-7609-4415-89de-43f367ce81f1/bin-2019/utaipan/data/1aa0902d4/3103f25ae1a04b889912d0765ec3df89 [2018-11-23 04:28:18,108 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 04:28:18,109 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 04:28:18,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 04:28:18,110 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 04:28:18,112 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 04:28:18,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:28:18" (1/1) ... [2018-11-23 04:28:18,114 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@651809fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:28:18, skipping insertion in model container [2018-11-23 04:28:18,114 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:28:18" (1/1) ... [2018-11-23 04:28:18,120 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 04:28:18,131 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 04:28:18,241 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 04:28:18,247 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 04:28:18,259 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 04:28:18,269 INFO L195 MainTranslator]: Completed translation [2018-11-23 04:28:18,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:28:18 WrapperNode [2018-11-23 04:28:18,269 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 04:28:18,270 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 04:28:18,270 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 04:28:18,270 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 04:28:18,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:28:18" (1/1) ... [2018-11-23 04:28:18,280 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:28:18" (1/1) ... [2018-11-23 04:28:18,285 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 04:28:18,285 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 04:28:18,285 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 04:28:18,285 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 04:28:18,323 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:28:18" (1/1) ... [2018-11-23 04:28:18,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:28:18" (1/1) ... [2018-11-23 04:28:18,325 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:28:18" (1/1) ... [2018-11-23 04:28:18,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:28:18" (1/1) ... [2018-11-23 04:28:18,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:28:18" (1/1) ... [2018-11-23 04:28:18,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:28:18" (1/1) ... [2018-11-23 04:28:18,335 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:28:18" (1/1) ... [2018-11-23 04:28:18,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 04:28:18,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 04:28:18,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 04:28:18,337 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 04:28:18,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:28:18" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a7936379-7609-4415-89de-43f367ce81f1/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 [2018-11-23 04:28:18,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-23 04:28:18,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-23 04:28:18,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-23 04:28:18,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 04:28:18,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 04:28:18,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2018-11-23 04:28:18,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-23 04:28:18,376 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-23 04:28:18,376 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-23 04:28:18,376 INFO L130 BoogieDeclarations]: Found specification of procedure areNatural [2018-11-23 04:28:18,376 INFO L138 BoogieDeclarations]: Found implementation of procedure areNatural [2018-11-23 04:28:18,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-23 04:28:18,490 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 04:28:18,490 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-11-23 04:28:18,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:28:18 BoogieIcfgContainer [2018-11-23 04:28:18,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 04:28:18,491 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-23 04:28:18,491 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-23 04:28:18,493 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-23 04:28:18,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:28:18" (1/3) ... [2018-11-23 04:28:18,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c71f91c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:28:18, skipping insertion in model container [2018-11-23 04:28:18,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:28:18" (2/3) ... [2018-11-23 04:28:18,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c71f91c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:28:18, skipping insertion in model container [2018-11-23 04:28:18,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:28:18" (3/3) ... [2018-11-23 04:28:18,495 INFO L112 eAbstractionObserver]: Analyzing ICFG naturalNumbers1_false-valid-deref.c [2018-11-23 04:28:18,503 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-23 04:28:18,509 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-11-23 04:28:18,519 INFO L257 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2018-11-23 04:28:18,533 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-23 04:28:18,533 INFO L383 AbstractCegarLoop]: Hoare is false [2018-11-23 04:28:18,533 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-23 04:28:18,533 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 04:28:18,533 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 04:28:18,534 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-23 04:28:18,534 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 04:28:18,534 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-23 04:28:18,546 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-11-23 04:28:18,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-23 04:28:18,554 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 04:28:18,554 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 04:28:18,555 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, areNaturalErr0REQUIRES_VIOLATION, areNaturalErr1REQUIRES_VIOLATION]=== [2018-11-23 04:28:18,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 04:28:18,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1845664052, now seen corresponding path program 1 times [2018-11-23 04:28:18,560 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 04:28:18,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 04:28:18,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 04:28:18,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 04:28:18,590 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 04:28:18,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 04:28:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 04:28:18,678 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 04:28:18,679 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-23 04:28:18,679 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 04:28:18,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 04:28:18,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 04:28:18,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 04:28:18,692 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states. [2018-11-23 04:28:18,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 04:28:18,758 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-11-23 04:28:18,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 04:28:18,759 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-11-23 04:28:18,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 04:28:18,767 INFO L225 Difference]: With dead ends: 21 [2018-11-23 04:28:18,767 INFO L226 Difference]: Without dead ends: 18 [2018-11-23 04:28:18,768 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 [2018-11-23 04:28:18,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-23 04:28:18,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-23 04:28:18,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-23 04:28:18,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-23 04:28:18,791 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 10 [2018-11-23 04:28:18,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 04:28:18,791 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-23 04:28:18,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 04:28:18,792 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-23 04:28:18,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-23 04:28:18,792 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 04:28:18,792 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 04:28:18,792 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, areNaturalErr0REQUIRES_VIOLATION, areNaturalErr1REQUIRES_VIOLATION]=== [2018-11-23 04:28:18,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 04:28:18,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1845664051, now seen corresponding path program 1 times [2018-11-23 04:28:18,793 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 04:28:18,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 04:28:18,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 04:28:18,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 04:28:18,794 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 04:28:18,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 04:28:18,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 04:28:18,912 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 04:28:18,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-23 04:28:18,912 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 04:28:18,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 04:28:18,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 04:28:18,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 04:28:18,914 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2018-11-23 04:28:18,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 04:28:18,969 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2018-11-23 04:28:18,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 04:28:18,970 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-11-23 04:28:18,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 04:28:18,972 INFO L225 Difference]: With dead ends: 23 [2018-11-23 04:28:18,972 INFO L226 Difference]: Without dead ends: 23 [2018-11-23 04:28:18,973 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 [2018-11-23 04:28:18,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-23 04:28:18,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2018-11-23 04:28:18,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-23 04:28:18,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-11-23 04:28:18,976 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 10 [2018-11-23 04:28:18,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 04:28:18,976 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-11-23 04:28:18,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 04:28:18,976 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-11-23 04:28:18,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-23 04:28:18,977 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 04:28:18,977 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 04:28:18,977 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, areNaturalErr0REQUIRES_VIOLATION, areNaturalErr1REQUIRES_VIOLATION]=== [2018-11-23 04:28:18,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 04:28:18,978 INFO L82 PathProgramCache]: Analyzing trace with hash -6453934, now seen corresponding path program 1 times [2018-11-23 04:28:18,978 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 04:28:18,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 04:28:18,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 04:28:18,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 04:28:18,979 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 04:28:18,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 04:28:19,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 04:28:19,113 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 04:28:19,113 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 04:28:19,114 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2018-11-23 04:28:19,116 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [10], [19], [20], [22], [26], [32], [33], [34], [36] [2018-11-23 04:28:19,139 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 04:28:19,139 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 04:28:19,277 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-23 04:28:19,279 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. [2018-11-23 04:28:19,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 04:28:19,285 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-23 04:28:19,285 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 04:28:19,286 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a7936379-7609-4415-89de-43f367ce81f1/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 [2018-11-23 04:28:19,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 04:28:19,292 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 04:28:19,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 04:28:19,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 04:28:19,384 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 [2018-11-23 04:28:19,386 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 [2018-11-23 04:28:19,387 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-23 04:28:19,388 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-23 04:28:19,389 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-23 04:28:19,389 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2018-11-23 04:28:19,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 04:28:19,398 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 04:28:19,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 04:28:19,476 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-23 04:28:19,476 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [6] total 14 [2018-11-23 04:28:19,476 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 04:28:19,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-23 04:28:19,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 04:28:19,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2018-11-23 04:28:19,477 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2018-11-23 04:28:19,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 04:28:19,541 INFO L93 Difference]: Finished difference Result 16 states and 15 transitions. [2018-11-23 04:28:19,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-23 04:28:19,542 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-11-23 04:28:19,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 04:28:19,542 INFO L225 Difference]: With dead ends: 16 [2018-11-23 04:28:19,542 INFO L226 Difference]: Without dead ends: 16 [2018-11-23 04:28:19,543 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2018-11-23 04:28:19,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-11-23 04:28:19,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-11-23 04:28:19,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-11-23 04:28:19,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 15 transitions. [2018-11-23 04:28:19,544 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 15 transitions. Word has length 13 [2018-11-23 04:28:19,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 04:28:19,545 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 15 transitions. [2018-11-23 04:28:19,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-23 04:28:19,545 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 15 transitions. [2018-11-23 04:28:19,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-23 04:28:19,545 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 04:28:19,545 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 04:28:19,546 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, areNaturalErr0REQUIRES_VIOLATION, areNaturalErr1REQUIRES_VIOLATION]=== [2018-11-23 04:28:19,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 04:28:19,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1907814666, now seen corresponding path program 1 times [2018-11-23 04:28:19,546 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 04:28:19,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 04:28:19,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 04:28:19,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 04:28:19,547 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 04:28:19,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 04:28:19,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 04:28:19,601 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 04:28:19,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-23 04:28:19,602 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 04:28:19,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-23 04:28:19,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-23 04:28:19,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-23 04:28:19,602 INFO L87 Difference]: Start difference. First operand 16 states and 15 transitions. Second operand 4 states. [2018-11-23 04:28:19,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 04:28:19,627 INFO L93 Difference]: Finished difference Result 15 states and 14 transitions. [2018-11-23 04:28:19,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-23 04:28:19,628 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-11-23 04:28:19,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 04:28:19,628 INFO L225 Difference]: With dead ends: 15 [2018-11-23 04:28:19,628 INFO L226 Difference]: Without dead ends: 0 [2018-11-23 04:28:19,628 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 [2018-11-23 04:28:19,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-23 04:28:19,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-23 04:28:19,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-23 04:28:19,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-23 04:28:19,629 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2018-11-23 04:28:19,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 04:28:19,629 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 04:28:19,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-23 04:28:19,629 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-23 04:28:19,630 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-23 04:28:19,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 04:28:19 BoogieIcfgContainer [2018-11-23 04:28:19,633 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-23 04:28:19,633 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 04:28:19,633 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 04:28:19,633 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 04:28:19,633 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:28:18" (3/4) ... [2018-11-23 04:28:19,635 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-23 04:28:19,639 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-23 04:28:19,639 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-23 04:28:19,639 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure areNatural [2018-11-23 04:28:19,641 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2018-11-23 04:28:19,641 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2018-11-23 04:28:19,642 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-23 04:28:19,642 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-23 04:28:19,642 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-23 04:28:19,667 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_a7936379-7609-4415-89de-43f367ce81f1/bin-2019/utaipan/witness.graphml [2018-11-23 04:28:19,668 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 04:28:19,668 INFO L168 Benchmark]: Toolchain (without parser) took 1559.65 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 123.2 MB). Free memory was 958.2 MB in the beginning and 970.2 MB in the end (delta: -12.1 MB). Peak memory consumption was 111.1 MB. Max. memory is 11.5 GB. [2018-11-23 04:28:19,669 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 04:28:19,669 INFO L168 Benchmark]: CACSL2BoogieTranslator took 160.02 ms. Allocated memory is still 1.0 GB. Free memory was 958.2 MB in the beginning and 947.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 04:28:19,670 INFO L168 Benchmark]: Boogie Procedure Inliner took 15.17 ms. Allocated memory is still 1.0 GB. Free memory was 947.4 MB in the beginning and 944.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 04:28:19,670 INFO L168 Benchmark]: Boogie Preprocessor took 51.47 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 123.2 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -172.8 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. [2018-11-23 04:28:19,670 INFO L168 Benchmark]: RCFGBuilder took 153.64 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: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 11.5 GB. [2018-11-23 04:28:19,671 INFO L168 Benchmark]: TraceAbstraction took 1141.72 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 973.7 MB in the end (delta: 128.8 MB). Peak memory consumption was 128.8 MB. Max. memory is 11.5 GB. [2018-11-23 04:28:19,671 INFO L168 Benchmark]: Witness Printer took 34.81 ms. Allocated memory is still 1.2 GB. Free memory was 973.7 MB in the beginning and 970.2 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 11.5 GB. [2018-11-23 04:28:19,674 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 160.02 ms. Allocated memory is still 1.0 GB. Free memory was 958.2 MB in the beginning and 947.4 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 15.17 ms. Allocated memory is still 1.0 GB. Free memory was 947.4 MB in the beginning and 944.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 51.47 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 123.2 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -172.8 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 153.64 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: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1141.72 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 973.7 MB in the end (delta: 128.8 MB). Peak memory consumption was 128.8 MB. Max. memory is 11.5 GB. * Witness Printer took 34.81 ms. Allocated memory is still 1.2 GB. Free memory was 973.7 MB in the beginning and 970.2 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 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, 1.1s OverallTime, 4 OverallIterations, 2 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 47 SDtfs, 43 SDslu, 81 SDs, 0 SdLazy, 94 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s 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, 0.4s 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...