./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/Ackermann_false-no-overflow.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_86cdf659-1c4d-4b9e-94f9-56406f730069/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_86cdf659-1c4d-4b9e-94f9-56406f730069/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_86cdf659-1c4d-4b9e-94f9-56406f730069/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_86cdf659-1c4d-4b9e-94f9-56406f730069/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/Ackermann_false-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_86cdf659-1c4d-4b9e-94f9-56406f730069/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_86cdf659-1c4d-4b9e-94f9-56406f730069/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 5917ee93972738bd406398210804e4342159e8a8 .................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW) --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-02 04:15:44,639 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 04:15:44,640 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 04:15:44,648 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 04:15:44,648 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 04:15:44,648 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 04:15:44,649 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 04:15:44,650 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 04:15:44,652 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 04:15:44,652 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 04:15:44,653 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 04:15:44,653 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 04:15:44,654 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 04:15:44,654 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 04:15:44,655 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 04:15:44,656 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 04:15:44,656 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 04:15:44,657 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 04:15:44,659 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 04:15:44,660 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 04:15:44,661 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 04:15:44,661 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 04:15:44,663 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 04:15:44,663 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 04:15:44,663 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 04:15:44,664 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 04:15:44,665 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 04:15:44,665 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 04:15:44,666 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 04:15:44,667 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 04:15:44,667 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 04:15:44,667 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 04:15:44,667 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 04:15:44,667 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 04:15:44,668 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 04:15:44,668 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 04:15:44,669 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_86cdf659-1c4d-4b9e-94f9-56406f730069/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2018-12-02 04:15:44,679 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 04:15:44,679 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 04:15:44,679 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 04:15:44,679 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 04:15:44,680 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-02 04:15:44,680 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-02 04:15:44,680 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-02 04:15:44,680 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-02 04:15:44,680 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-02 04:15:44,680 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-02 04:15:44,680 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-02 04:15:44,680 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-02 04:15:44,680 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-02 04:15:44,681 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 04:15:44,681 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-02 04:15:44,681 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-02 04:15:44,681 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 04:15:44,681 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-02 04:15:44,681 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 04:15:44,682 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-02 04:15:44,682 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-12-02 04:15:44,682 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-02 04:15:44,682 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-02 04:15:44,682 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 04:15:44,682 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 04:15:44,682 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 04:15:44,682 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 04:15:44,682 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 04:15:44,683 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 04:15:44,683 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 04:15:44,683 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-02 04:15:44,683 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-02 04:15:44,683 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 04:15:44,683 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-02 04:15:44,683 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-02 04:15:44,683 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_86cdf659-1c4d-4b9e-94f9-56406f730069/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 ! overflow) ) 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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5917ee93972738bd406398210804e4342159e8a8 [2018-12-02 04:15:44,705 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 04:15:44,715 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 04:15:44,717 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 04:15:44,718 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 04:15:44,719 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 04:15:44,719 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_86cdf659-1c4d-4b9e-94f9-56406f730069/bin-2019/utaipan/../../sv-benchmarks/c/termination-crafted/Ackermann_false-no-overflow.c [2018-12-02 04:15:44,765 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_86cdf659-1c4d-4b9e-94f9-56406f730069/bin-2019/utaipan/data/16294db31/2e3952612d6444d6987ba6561c854a4f/FLAG2779b63dd [2018-12-02 04:15:45,043 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 04:15:45,043 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_86cdf659-1c4d-4b9e-94f9-56406f730069/sv-benchmarks/c/termination-crafted/Ackermann_false-no-overflow.c [2018-12-02 04:15:45,047 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_86cdf659-1c4d-4b9e-94f9-56406f730069/bin-2019/utaipan/data/16294db31/2e3952612d6444d6987ba6561c854a4f/FLAG2779b63dd [2018-12-02 04:15:45,055 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_86cdf659-1c4d-4b9e-94f9-56406f730069/bin-2019/utaipan/data/16294db31/2e3952612d6444d6987ba6561c854a4f [2018-12-02 04:15:45,056 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 04:15:45,057 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 04:15:45,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 04:15:45,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 04:15:45,060 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 04:15:45,060 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:15:45" (1/1) ... [2018-12-02 04:15:45,062 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4888228d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:15:45, skipping insertion in model container [2018-12-02 04:15:45,062 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:15:45" (1/1) ... [2018-12-02 04:15:45,066 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 04:15:45,075 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 04:15:45,157 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 04:15:45,159 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 04:15:45,168 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 04:15:45,176 INFO L195 MainTranslator]: Completed translation [2018-12-02 04:15:45,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:15:45 WrapperNode [2018-12-02 04:15:45,176 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 04:15:45,177 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 04:15:45,177 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 04:15:45,177 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 04:15:45,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:15:45" (1/1) ... [2018-12-02 04:15:45,185 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:15:45" (1/1) ... [2018-12-02 04:15:45,188 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 04:15:45,189 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 04:15:45,189 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 04:15:45,189 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 04:15:45,194 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:15:45" (1/1) ... [2018-12-02 04:15:45,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:15:45" (1/1) ... [2018-12-02 04:15:45,195 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:15:45" (1/1) ... [2018-12-02 04:15:45,195 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:15:45" (1/1) ... [2018-12-02 04:15:45,197 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:15:45" (1/1) ... [2018-12-02 04:15:45,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:15:45" (1/1) ... [2018-12-02 04:15:45,199 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:15:45" (1/1) ... [2018-12-02 04:15:45,199 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 04:15:45,200 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 04:15:45,200 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 04:15:45,200 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 04:15:45,201 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:15:45" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_86cdf659-1c4d-4b9e-94f9-56406f730069/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 [2018-12-02 04:15:45,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-02 04:15:45,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-02 04:15:45,267 INFO L130 BoogieDeclarations]: Found specification of procedure Ack [2018-12-02 04:15:45,267 INFO L138 BoogieDeclarations]: Found implementation of procedure Ack [2018-12-02 04:15:45,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 04:15:45,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 04:15:45,267 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-02 04:15:45,267 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-02 04:15:45,385 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 04:15:45,385 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-02 04:15:45,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:15:45 BoogieIcfgContainer [2018-12-02 04:15:45,386 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 04:15:45,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 04:15:45,386 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 04:15:45,389 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 04:15:45,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:15:45" (1/3) ... [2018-12-02 04:15:45,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6774d488 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:15:45, skipping insertion in model container [2018-12-02 04:15:45,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:15:45" (2/3) ... [2018-12-02 04:15:45,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6774d488 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:15:45, skipping insertion in model container [2018-12-02 04:15:45,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:15:45" (3/3) ... [2018-12-02 04:15:45,391 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann_false-no-overflow.c [2018-12-02 04:15:45,398 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 04:15:45,403 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2018-12-02 04:15:45,414 INFO L257 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2018-12-02 04:15:45,431 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 04:15:45,432 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-02 04:15:45,432 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 04:15:45,432 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 04:15:45,432 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 04:15:45,432 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 04:15:45,432 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 04:15:45,432 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 04:15:45,442 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2018-12-02 04:15:45,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-02 04:15:45,446 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 04:15:45,446 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 04:15:45,447 INFO L423 AbstractCegarLoop]: === Iteration 1 === [AckErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 04:15:45,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 04:15:45,450 INFO L82 PathProgramCache]: Analyzing trace with hash -73959616, now seen corresponding path program 1 times [2018-12-02 04:15:45,452 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 04:15:45,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 04:15:45,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 04:15:45,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 04:15:45,481 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 04:15:45,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 04:15:45,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 04:15:45,520 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-02 04:15:45,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 04:15:45 BoogieIcfgContainer [2018-12-02 04:15:45,534 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-02 04:15:45,535 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 04:15:45,535 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 04:15:45,535 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 04:15:45,535 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:15:45" (3/4) ... [2018-12-02 04:15:45,537 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-02 04:15:45,559 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_86cdf659-1c4d-4b9e-94f9-56406f730069/bin-2019/utaipan/witness.graphml [2018-12-02 04:15:45,559 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 04:15:45,559 INFO L168 Benchmark]: Toolchain (without parser) took 502.70 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 108.5 MB). Free memory was 957.1 MB in the beginning and 1.1 GB in the end (delta: -115.4 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 04:15:45,560 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 04:15:45,560 INFO L168 Benchmark]: CACSL2BoogieTranslator took 118.68 ms. Allocated memory is still 1.0 GB. Free memory was 957.1 MB in the beginning and 946.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-02 04:15:45,561 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.89 ms. Allocated memory is still 1.0 GB. Free memory is still 946.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 04:15:45,561 INFO L168 Benchmark]: Boogie Preprocessor took 10.80 ms. Allocated memory is still 1.0 GB. Free memory is still 946.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 04:15:45,561 INFO L168 Benchmark]: RCFGBuilder took 185.88 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 108.5 MB). Free memory was 946.3 MB in the beginning and 1.1 GB in the end (delta: -140.2 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2018-12-02 04:15:45,562 INFO L168 Benchmark]: TraceAbstraction took 148.19 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: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 11.5 GB. [2018-12-02 04:15:45,562 INFO L168 Benchmark]: Witness Printer took 24.37 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 04:15:45,563 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 118.68 ms. Allocated memory is still 1.0 GB. Free memory was 957.1 MB in the beginning and 946.3 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 11.89 ms. Allocated memory is still 1.0 GB. Free memory is still 946.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.80 ms. Allocated memory is still 1.0 GB. Free memory is still 946.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 185.88 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 108.5 MB). Free memory was 946.3 MB in the beginning and 1.1 GB in the end (delta: -140.2 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 148.19 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: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 11.5 GB. * Witness Printer took 24.37 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: integer overflow possible integer overflow possible We found a FailurePath: [L16] int x = __VERIFIER_nondet_int(); [L17] int y = __VERIFIER_nondet_int(); [L18] COND FALSE !(x < 0 || y < 0) VAL [x=0, y=2147483647] [L21] CALL Ack(x, y) VAL [\old(m)=0, \old(n)=2147483647] [L10] COND TRUE m == 0 VAL [\old(m)=0, \old(n)=2147483647, m=0, n=2147483647] [L10] n+1 VAL [\old(m)=0, \old(n)=2147483647, m=0, n=2147483647] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 39 locations, 8 error locations. UNSAFE Result, 0.1s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...