./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive/Ackermann02_false-unreach-call_true-no-overflow_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_54cad335-39f6-4b55-9c45-e5dc23f87d1a/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_54cad335-39f6-4b55-9c45-e5dc23f87d1a/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_54cad335-39f6-4b55-9c45-e5dc23f87d1a/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_54cad335-39f6-4b55-9c45-e5dc23f87d1a/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann02_false-unreach-call_true-no-overflow_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_54cad335-39f6-4b55-9c45-e5dc23f87d1a/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_54cad335-39f6-4b55-9c45-e5dc23f87d1a/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dd82318ec795f8c5ba1d6bd1e94de4995b910941 ............................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-10-26 21:02:25,876 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 21:02:25,877 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 21:02:25,888 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 21:02:25,889 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 21:02:25,889 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 21:02:25,890 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 21:02:25,891 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 21:02:25,893 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 21:02:25,893 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 21:02:25,894 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 21:02:25,894 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 21:02:25,895 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 21:02:25,896 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 21:02:25,897 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 21:02:25,897 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 21:02:25,898 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 21:02:25,899 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 21:02:25,901 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 21:02:25,902 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 21:02:25,903 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 21:02:25,904 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 21:02:25,906 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 21:02:25,906 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 21:02:25,906 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 21:02:25,907 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 21:02:25,907 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 21:02:25,909 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 21:02:25,909 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 21:02:25,910 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 21:02:25,910 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 21:02:25,911 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 21:02:25,911 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 21:02:25,911 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 21:02:25,912 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 21:02:25,914 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 21:02:25,915 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_54cad335-39f6-4b55-9c45-e5dc23f87d1a/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-26 21:02:25,932 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 21:02:25,932 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 21:02:25,933 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 21:02:25,933 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-26 21:02:25,933 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-26 21:02:25,933 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-26 21:02:25,934 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-26 21:02:25,934 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-26 21:02:25,934 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-26 21:02:25,934 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-26 21:02:25,934 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-26 21:02:25,935 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 21:02:25,935 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 21:02:25,935 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 21:02:25,935 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 21:02:25,935 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 21:02:25,935 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 21:02:25,935 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 21:02:25,936 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 21:02:25,936 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 21:02:25,938 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 21:02:25,938 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 21:02:25,938 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 21:02:25,938 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 21:02:25,939 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 21:02:25,939 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 21:02:25,939 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 21:02:25,939 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 21:02:25,939 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 21:02:25,939 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 21:02:25,939 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-26 21:02:25,940 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 21:02:25,940 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 21:02:25,940 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 21:02:25,940 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_54cad335-39f6-4b55-9c45-e5dc23f87d1a/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dd82318ec795f8c5ba1d6bd1e94de4995b910941 [2018-10-26 21:02:25,971 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 21:02:25,981 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 21:02:25,983 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 21:02:25,984 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 21:02:25,985 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 21:02:25,985 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_54cad335-39f6-4b55-9c45-e5dc23f87d1a/bin-2019/utaipan/../../sv-benchmarks/c/recursive/Ackermann02_false-unreach-call_true-no-overflow_true-termination.c [2018-10-26 21:02:26,033 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_54cad335-39f6-4b55-9c45-e5dc23f87d1a/bin-2019/utaipan/data/69c800203/bfb7a1b6a055402b93e81d92c8308f49/FLAG940945698 [2018-10-26 21:02:26,403 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 21:02:26,403 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_54cad335-39f6-4b55-9c45-e5dc23f87d1a/sv-benchmarks/c/recursive/Ackermann02_false-unreach-call_true-no-overflow_true-termination.c [2018-10-26 21:02:26,408 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_54cad335-39f6-4b55-9c45-e5dc23f87d1a/bin-2019/utaipan/data/69c800203/bfb7a1b6a055402b93e81d92c8308f49/FLAG940945698 [2018-10-26 21:02:26,417 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_54cad335-39f6-4b55-9c45-e5dc23f87d1a/bin-2019/utaipan/data/69c800203/bfb7a1b6a055402b93e81d92c8308f49 [2018-10-26 21:02:26,419 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 21:02:26,420 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-26 21:02:26,421 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 21:02:26,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 21:02:26,424 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 21:02:26,425 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:02:26" (1/1) ... [2018-10-26 21:02:26,427 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b5e92be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:02:26, skipping insertion in model container [2018-10-26 21:02:26,427 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:02:26" (1/1) ... [2018-10-26 21:02:26,436 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 21:02:26,449 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 21:02:26,568 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 21:02:26,571 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 21:02:26,585 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 21:02:26,595 INFO L193 MainTranslator]: Completed translation [2018-10-26 21:02:26,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:02:26 WrapperNode [2018-10-26 21:02:26,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 21:02:26,596 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 21:02:26,596 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 21:02:26,596 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 21:02:26,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:02:26" (1/1) ... [2018-10-26 21:02:26,608 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:02:26" (1/1) ... [2018-10-26 21:02:26,613 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 21:02:26,613 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 21:02:26,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 21:02:26,614 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 21:02:26,621 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:02:26" (1/1) ... [2018-10-26 21:02:26,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:02:26" (1/1) ... [2018-10-26 21:02:26,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:02:26" (1/1) ... [2018-10-26 21:02:26,622 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:02:26" (1/1) ... [2018-10-26 21:02:26,625 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:02:26" (1/1) ... [2018-10-26 21:02:26,626 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:02:26" (1/1) ... [2018-10-26 21:02:26,627 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:02:26" (1/1) ... [2018-10-26 21:02:26,628 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 21:02:26,629 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 21:02:26,629 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 21:02:26,629 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 21:02:26,630 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:02:26" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_54cad335-39f6-4b55-9c45-e5dc23f87d1a/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 [2018-10-26 21:02:26,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 21:02:26,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 21:02:26,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 21:02:26,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 21:02:26,775 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 21:02:26,775 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 21:02:26,775 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2018-10-26 21:02:26,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2018-10-26 21:02:27,140 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 21:02:27,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:02:27 BoogieIcfgContainer [2018-10-26 21:02:27,141 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 21:02:27,141 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 21:02:27,141 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 21:02:27,145 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 21:02:27,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:02:26" (1/3) ... [2018-10-26 21:02:27,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@abff3e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:02:27, skipping insertion in model container [2018-10-26 21:02:27,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:02:26" (2/3) ... [2018-10-26 21:02:27,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@abff3e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:02:27, skipping insertion in model container [2018-10-26 21:02:27,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:02:27" (3/3) ... [2018-10-26 21:02:27,148 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann02_false-unreach-call_true-no-overflow_true-termination.c [2018-10-26 21:02:27,155 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 21:02:27,160 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 21:02:27,169 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 21:02:27,194 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 21:02:27,195 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 21:02:27,195 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 21:02:27,195 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 21:02:27,195 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 21:02:27,195 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 21:02:27,195 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 21:02:27,195 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 21:02:27,210 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2018-10-26 21:02:27,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-26 21:02:27,215 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:02:27,216 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:02:27,218 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:02:27,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:02:27,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1560979177, now seen corresponding path program 1 times [2018-10-26 21:02:27,225 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 21:02:27,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:02:27,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:02:27,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:02:27,267 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 21:02:27,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:02:27,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:02:27,416 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:02:27,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-26 21:02:27,416 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 21:02:27,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 21:02:27,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 21:02:27,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-26 21:02:27,429 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2018-10-26 21:02:27,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:02:27,638 INFO L93 Difference]: Finished difference Result 55 states and 77 transitions. [2018-10-26 21:02:27,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 21:02:27,639 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-10-26 21:02:27,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:02:27,647 INFO L225 Difference]: With dead ends: 55 [2018-10-26 21:02:27,647 INFO L226 Difference]: Without dead ends: 28 [2018-10-26 21:02:27,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-26 21:02:27,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-26 21:02:27,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-26 21:02:27,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-26 21:02:27,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2018-10-26 21:02:27,687 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2018-10-26 21:02:27,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:02:27,688 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2018-10-26 21:02:27,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 21:02:27,688 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2018-10-26 21:02:27,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-26 21:02:27,690 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:02:27,690 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:02:27,690 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:02:27,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:02:27,691 INFO L82 PathProgramCache]: Analyzing trace with hash -649197850, now seen corresponding path program 1 times [2018-10-26 21:02:27,691 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 21:02:27,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:02:27,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:02:27,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:02:27,692 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 21:02:27,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:02:27,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-26 21:02:27,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:02:27,886 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 21:02:27,888 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 23 with the following transitions: [2018-10-26 21:02:27,890 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [14], [18], [20], [23], [26], [27], [30], [32], [38], [39], [40], [41], [43], [44], [45], [46] [2018-10-26 21:02:27,949 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-26 21:02:27,949 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-26 21:02:28,080 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-26 21:02:28,082 INFO L272 AbstractInterpreter]: Visited 20 different actions 27 times. Merged at 2 different actions 2 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 6 variables. [2018-10-26 21:02:28,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:02:28,100 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-26 21:02:28,100 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:02:28,100 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_54cad335-39f6-4b55-9c45-e5dc23f87d1a/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 [2018-10-26 21:02:28,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:02:28,107 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-26 21:02:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:02:28,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:02:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-26 21:02:28,171 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 21:02:28,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-26 21:02:28,503 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 21:02:28,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 9 [2018-10-26 21:02:28,504 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 21:02:28,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 21:02:28,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 21:02:28,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-10-26 21:02:28,505 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 7 states. [2018-10-26 21:02:28,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:02:28,894 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2018-10-26 21:02:28,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-26 21:02:28,895 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2018-10-26 21:02:28,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:02:28,896 INFO L225 Difference]: With dead ends: 49 [2018-10-26 21:02:28,896 INFO L226 Difference]: Without dead ends: 45 [2018-10-26 21:02:28,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-10-26 21:02:28,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-26 21:02:28,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-26 21:02:28,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-26 21:02:28,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 63 transitions. [2018-10-26 21:02:28,907 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 63 transitions. Word has length 22 [2018-10-26 21:02:28,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:02:28,908 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 63 transitions. [2018-10-26 21:02:28,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-26 21:02:28,908 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 63 transitions. [2018-10-26 21:02:28,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-26 21:02:28,910 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:02:28,910 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:02:28,910 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:02:28,910 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:02:28,911 INFO L82 PathProgramCache]: Analyzing trace with hash -272503677, now seen corresponding path program 2 times [2018-10-26 21:02:28,911 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 21:02:28,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:02:28,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:02:28,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:02:28,912 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 21:02:28,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:02:28,957 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-10-26 21:02:28,957 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:02:28,957 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 21:02:28,957 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 21:02:28,957 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 21:02:28,957 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:02:28,957 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_54cad335-39f6-4b55-9c45-e5dc23f87d1a/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 21:02:28,966 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 21:02:28,966 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-26 21:02:29,007 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-26 21:02:29,007 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:02:29,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:02:29,012 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-10-26 21:02:29,012 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 21:02:29,089 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-10-26 21:02:29,107 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 21:02:29,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2018-10-26 21:02:29,107 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 21:02:29,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:02:29,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:02:29,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-26 21:02:29,109 INFO L87 Difference]: Start difference. First operand 45 states and 63 transitions. Second operand 4 states. [2018-10-26 21:02:29,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:02:29,166 INFO L93 Difference]: Finished difference Result 88 states and 151 transitions. [2018-10-26 21:02:29,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:02:29,167 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2018-10-26 21:02:29,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:02:29,169 INFO L225 Difference]: With dead ends: 88 [2018-10-26 21:02:29,170 INFO L226 Difference]: Without dead ends: 51 [2018-10-26 21:02:29,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-26 21:02:29,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-26 21:02:29,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-26 21:02:29,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-26 21:02:29,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 75 transitions. [2018-10-26 21:02:29,184 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 75 transitions. Word has length 29 [2018-10-26 21:02:29,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:02:29,185 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 75 transitions. [2018-10-26 21:02:29,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:02:29,185 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 75 transitions. [2018-10-26 21:02:29,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-26 21:02:29,186 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:02:29,186 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:02:29,186 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:02:29,187 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:02:29,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1759693041, now seen corresponding path program 1 times [2018-10-26 21:02:29,187 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 21:02:29,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:02:29,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:02:29,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:02:29,188 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 21:02:29,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 21:02:29,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 21:02:29,246 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-26 21:02:29,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 09:02:29 BoogieIcfgContainer [2018-10-26 21:02:29,270 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 21:02:29,270 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-26 21:02:29,271 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-26 21:02:29,271 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-26 21:02:29,271 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:02:27" (3/4) ... [2018-10-26 21:02:29,273 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-10-26 21:02:29,325 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_54cad335-39f6-4b55-9c45-e5dc23f87d1a/bin-2019/utaipan/witness.graphml [2018-10-26 21:02:29,326 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-26 21:02:29,326 INFO L168 Benchmark]: Toolchain (without parser) took 2906.62 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 175.6 MB). Free memory was 960.7 MB in the beginning and 1.0 GB in the end (delta: -64.6 MB). Peak memory consumption was 111.0 MB. Max. memory is 11.5 GB. [2018-10-26 21:02:29,328 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 21:02:29,328 INFO L168 Benchmark]: CACSL2BoogieTranslator took 174.65 ms. Allocated memory is still 1.0 GB. Free memory was 960.7 MB in the beginning and 950.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-26 21:02:29,328 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.06 ms. Allocated memory is still 1.0 GB. Free memory is still 950.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 21:02:29,329 INFO L168 Benchmark]: Boogie Preprocessor took 14.94 ms. Allocated memory is still 1.0 GB. Free memory was 950.0 MB in the beginning and 947.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-10-26 21:02:29,329 INFO L168 Benchmark]: RCFGBuilder took 511.92 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 175.6 MB). Free memory was 947.3 MB in the beginning and 1.2 GB in the end (delta: -213.4 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. [2018-10-26 21:02:29,330 INFO L168 Benchmark]: TraceAbstraction took 2128.86 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.0 GB in the end (delta: 130.0 MB). Peak memory consumption was 130.0 MB. Max. memory is 11.5 GB. [2018-10-26 21:02:29,330 INFO L168 Benchmark]: Witness Printer took 55.39 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-10-26 21:02:29,332 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 174.65 ms. Allocated memory is still 1.0 GB. Free memory was 960.7 MB in the beginning and 950.0 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 17.06 ms. Allocated memory is still 1.0 GB. Free memory is still 950.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.94 ms. Allocated memory is still 1.0 GB. Free memory was 950.0 MB in the beginning and 947.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 511.92 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 175.6 MB). Free memory was 947.3 MB in the beginning and 1.2 GB in the end (delta: -213.4 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2128.86 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.0 GB in the end (delta: 130.0 MB). Peak memory consumption was 130.0 MB. Max. memory is 11.5 GB. * Witness Printer took 55.39 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 43]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L26] int m = __VERIFIER_nondet_int(); [L27] COND FALSE !(m < 0 || m > 3) [L32] int n = __VERIFIER_nondet_int(); [L33] COND FALSE !(n < 0 || n > 23) VAL [m=2, n=0] [L39] CALL, EXPR ackermann(m,n) VAL [\old(m)=2, \old(n)=0] [L15] COND FALSE !(m==0) VAL [\old(m)=2, \old(n)=0, m=2, n=0] [L18] COND TRUE n==0 VAL [\old(m)=2, \old(n)=0, m=2, n=0] [L19] CALL, EXPR ackermann(m-1,1) VAL [\old(m)=1, \old(n)=1] [L15] COND FALSE !(m==0) VAL [\old(m)=1, \old(n)=1, m=1, n=1] [L18] COND FALSE !(n==0) VAL [\old(m)=1, \old(n)=1, m=1, n=1] [L21] CALL, EXPR ackermann(m,n-1) VAL [\old(m)=1, \old(n)=0] [L15] COND FALSE !(m==0) VAL [\old(m)=1, \old(n)=0, m=1, n=0] [L18] COND TRUE n==0 VAL [\old(m)=1, \old(n)=0, m=1, n=0] [L19] CALL, EXPR ackermann(m-1,1) VAL [\old(m)=0, \old(n)=1] [L15] COND TRUE m==0 [L16] RET return n+1; VAL [\old(m)=0, \old(n)=1, \result=2, m=0, n=1] [L19] EXPR ackermann(m-1,1) VAL [\old(m)=1, \old(n)=0, ackermann(m-1,1)=2, m=1, n=0] [L19] RET return ackermann(m-1,1); [L21] EXPR ackermann(m,n-1) VAL [\old(m)=1, \old(n)=1, ackermann(m,n-1)=2, m=1, n=1] [L21] CALL, EXPR ackermann(m-1,ackermann(m,n-1)) VAL [\old(m)=0, \old(n)=2] [L15] COND TRUE m==0 [L16] RET return n+1; VAL [\old(m)=0, \old(n)=2, \result=3, m=0, n=2] [L21] EXPR ackermann(m-1,ackermann(m,n-1)) VAL [\old(m)=1, \old(n)=1, ackermann(m,n-1)=2, ackermann(m-1,ackermann(m,n-1))=3, m=1, n=1] [L21] RET return ackermann(m-1,ackermann(m,n-1)); [L19] EXPR ackermann(m-1,1) VAL [\old(m)=2, \old(n)=0, ackermann(m-1,1)=3, m=2, n=0] [L19] RET return ackermann(m-1,1); [L39] EXPR ackermann(m,n) VAL [ackermann(m,n)=3, m=2, n=0] [L39] int result = ackermann(m,n); [L40] COND FALSE !(m < 2 || result >= 4) VAL [m=2, n=0, result=3] [L43] __VERIFIER_error() VAL [m=2, n=0, result=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. UNSAFE Result, 2.0s OverallTime, 4 OverallIterations, 5 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 77 SDtfs, 42 SDslu, 156 SDs, 0 SdLazy, 136 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 122 GetRequests, 97 SyntacticMatches, 8 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 159 NumberOfCodeBlocks, 159 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 161 ConstructedInterpolants, 0 QuantifiedInterpolants, 6965 SizeOfPredicates, 5 NumberOfNonLiveVariables, 152 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 46/57 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...