./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/recursive/Ackermann02_false-unreach-call_true-no-overflow_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0ed9222f Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/svcomp/c/recursive/Ackermann02_false-unreach-call_true-no-overflow_true-termination.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 Automizer --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 0.1.24-0ed9222-m [2019-01-12 14:56:16,907 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-12 14:56:16,909 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-12 14:56:16,921 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-12 14:56:16,921 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-12 14:56:16,922 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-12 14:56:16,924 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-12 14:56:16,926 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-12 14:56:16,927 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-12 14:56:16,928 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-12 14:56:16,929 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-01-12 14:56:16,929 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-01-12 14:56:16,931 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-01-12 14:56:16,932 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-01-12 14:56:16,933 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-01-12 14:56:16,934 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-01-12 14:56:16,934 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-01-12 14:56:16,937 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-01-12 14:56:16,939 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2019-01-12 14:56:16,941 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-01-12 14:56:16,942 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-01-12 14:56:16,943 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-01-12 14:56:16,946 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-01-12 14:56:16,946 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-01-12 14:56:16,947 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-01-12 14:56:16,948 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-01-12 14:56:16,949 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-01-12 14:56:16,950 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-01-12 14:56:16,951 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2019-01-12 14:56:16,952 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-01-12 14:56:16,952 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2019-01-12 14:56:16,954 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-01-12 14:56:16,954 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-01-12 14:56:16,954 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2019-01-12 14:56:16,955 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2019-01-12 14:56:16,956 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2019-01-12 14:56:16,957 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-01-12 14:56:16,972 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-12 14:56:16,973 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-12 14:56:16,974 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-12 14:56:16,974 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-12 14:56:16,974 INFO L133 SettingsManager]: * Use SBE=true [2019-01-12 14:56:16,975 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-12 14:56:16,975 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-12 14:56:16,975 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-12 14:56:16,975 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-12 14:56:16,975 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-12 14:56:16,976 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-12 14:56:16,976 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-12 14:56:16,976 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-12 14:56:16,976 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-12 14:56:16,976 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-12 14:56:16,976 INFO L133 SettingsManager]: * Use constant arrays=true [2019-01-12 14:56:16,977 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-12 14:56:16,978 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-12 14:56:16,978 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-12 14:56:16,978 INFO L133 SettingsManager]: * To the following directory=./dump/ [2019-01-12 14:56:16,979 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-12 14:56:16,979 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-12 14:56:16,979 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-12 14:56:16,979 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-12 14:56:16,979 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-12 14:56:16,980 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2019-01-12 14:56:16,981 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-12 14:56:16,981 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-01-12 14:56:16,981 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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 -> Automizer 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 [2019-01-12 14:56:17,018 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-12 14:56:17,037 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-12 14:56:17,044 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-12 14:56:17,045 INFO L271 PluginConnector]: Initializing CDTParser... [2019-01-12 14:56:17,045 INFO L276 PluginConnector]: CDTParser initialized [2019-01-12 14:56:17,046 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/recursive/Ackermann02_false-unreach-call_true-no-overflow_true-termination.c [2019-01-12 14:56:17,108 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08cb204b8/9acf8270ebb943c783ef97d750dfa025/FLAGf6da8f771 [2019-01-12 14:56:17,579 INFO L307 CDTParser]: Found 1 translation units. [2019-01-12 14:56:17,580 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/recursive/Ackermann02_false-unreach-call_true-no-overflow_true-termination.c [2019-01-12 14:56:17,587 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08cb204b8/9acf8270ebb943c783ef97d750dfa025/FLAGf6da8f771 [2019-01-12 14:56:17,909 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08cb204b8/9acf8270ebb943c783ef97d750dfa025 [2019-01-12 14:56:17,913 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-12 14:56:17,915 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-01-12 14:56:17,918 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-01-12 14:56:17,922 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-01-12 14:56:17,926 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2019-01-12 14:56:17,927 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.01 02:56:17" (1/1) ... [2019-01-12 14:56:17,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ea40dd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:17, skipping insertion in model container [2019-01-12 14:56:17,937 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.01 02:56:17" (1/1) ... [2019-01-12 14:56:17,946 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-01-12 14:56:17,967 INFO L176 MainTranslator]: Built tables and reachable declarations [2019-01-12 14:56:18,138 INFO L208 PostProcessor]: Analyzing one entry point: main [2019-01-12 14:56:18,143 INFO L191 MainTranslator]: Completed pre-run [2019-01-12 14:56:18,161 INFO L208 PostProcessor]: Analyzing one entry point: main [2019-01-12 14:56:18,174 INFO L195 MainTranslator]: Completed translation [2019-01-12 14:56:18,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:18 WrapperNode [2019-01-12 14:56:18,174 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-01-12 14:56:18,175 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-12 14:56:18,175 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-12 14:56:18,175 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-12 14:56:18,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:18" (1/1) ... [2019-01-12 14:56:18,189 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:18" (1/1) ... [2019-01-12 14:56:18,209 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-12 14:56:18,209 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-12 14:56:18,209 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-12 14:56:18,209 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-12 14:56:18,219 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:18" (1/1) ... [2019-01-12 14:56:18,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:18" (1/1) ... [2019-01-12 14:56:18,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:18" (1/1) ... [2019-01-12 14:56:18,220 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:18" (1/1) ... [2019-01-12 14:56:18,223 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:18" (1/1) ... [2019-01-12 14:56:18,226 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:18" (1/1) ... [2019-01-12 14:56:18,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:18" (1/1) ... [2019-01-12 14:56:18,228 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-12 14:56:18,233 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-12 14:56:18,234 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-12 14:56:18,234 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-12 14:56:18,235 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-01-12 14:56:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-12 14:56:18,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-12 14:56:18,356 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2019-01-12 14:56:18,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2019-01-12 14:56:18,600 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-12 14:56:18,600 INFO L286 CfgBuilder]: Removed 4 assue(true) statements. [2019-01-12 14:56:18,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.01 02:56:18 BoogieIcfgContainer [2019-01-12 14:56:18,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-12 14:56:18,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-12 14:56:18,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-12 14:56:18,605 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-12 14:56:18,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.01 02:56:17" (1/3) ... [2019-01-12 14:56:18,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12a0fcd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.01 02:56:18, skipping insertion in model container [2019-01-12 14:56:18,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:18" (2/3) ... [2019-01-12 14:56:18,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12a0fcd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.01 02:56:18, skipping insertion in model container [2019-01-12 14:56:18,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.01 02:56:18" (3/3) ... [2019-01-12 14:56:18,608 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann02_false-unreach-call_true-no-overflow_true-termination.c [2019-01-12 14:56:18,617 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-12 14:56:18,624 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-01-12 14:56:18,636 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-01-12 14:56:18,667 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2019-01-12 14:56:18,668 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-12 14:56:18,668 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-12 14:56:18,668 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-12 14:56:18,668 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-12 14:56:18,668 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-12 14:56:18,669 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-12 14:56:18,669 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-12 14:56:18,669 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-12 14:56:18,686 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-01-12 14:56:18,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-01-12 14:56:18,693 INFO L394 BasicCegarLoop]: Found error trace [2019-01-12 14:56:18,694 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-12 14:56:18,696 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-12 14:56:18,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-12 14:56:18,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1260755674, now seen corresponding path program 1 times [2019-01-12 14:56:18,704 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-12 14:56:18,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-12 14:56:18,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 14:56:18,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-12 14:56:18,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 14:56:18,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-12 14:56:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-12 14:56:19,010 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-12 14:56:19,011 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-01-12 14:56:19,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-01-12 14:56:19,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-01-12 14:56:19,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-01-12 14:56:19,027 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states. [2019-01-12 14:56:19,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-12 14:56:19,269 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions. [2019-01-12 14:56:19,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-12 14:56:19,271 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-01-12 14:56:19,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-12 14:56:19,281 INFO L225 Difference]: With dead ends: 50 [2019-01-12 14:56:19,282 INFO L226 Difference]: Without dead ends: 24 [2019-01-12 14:56:19,286 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-01-12 14:56:19,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-01-12 14:56:19,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-01-12 14:56:19,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-01-12 14:56:19,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2019-01-12 14:56:19,330 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 11 [2019-01-12 14:56:19,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-12 14:56:19,331 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2019-01-12 14:56:19,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-01-12 14:56:19,331 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2019-01-12 14:56:19,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-01-12 14:56:19,334 INFO L394 BasicCegarLoop]: Found error trace [2019-01-12 14:56:19,334 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-12 14:56:19,335 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-12 14:56:19,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-12 14:56:19,335 INFO L82 PathProgramCache]: Analyzing trace with hash 963920485, now seen corresponding path program 1 times [2019-01-12 14:56:19,335 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-12 14:56:19,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-12 14:56:19,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 14:56:19,337 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-12 14:56:19,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 14:56:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-12 14:56:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-12 14:56:19,661 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-12 14:56:19,661 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-01-12 14:56:19,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-12 14:56:19,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-12 14:56:19,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-12 14:56:19,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-01-12 14:56:19,771 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-01-12 14:56:19,771 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2019-01-12 14:56:19,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-01-12 14:56:19,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-01-12 14:56:19,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-01-12 14:56:19,774 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 7 states. [2019-01-12 14:56:20,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-12 14:56:20,120 INFO L93 Difference]: Finished difference Result 45 states and 63 transitions. [2019-01-12 14:56:20,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-12 14:56:20,123 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2019-01-12 14:56:20,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-12 14:56:20,127 INFO L225 Difference]: With dead ends: 45 [2019-01-12 14:56:20,127 INFO L226 Difference]: Without dead ends: 41 [2019-01-12 14:56:20,129 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-01-12 14:56:20,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-01-12 14:56:20,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-01-12 14:56:20,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-01-12 14:56:20,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 59 transitions. [2019-01-12 14:56:20,143 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 59 transitions. Word has length 18 [2019-01-12 14:56:20,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-12 14:56:20,144 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 59 transitions. [2019-01-12 14:56:20,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-01-12 14:56:20,144 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 59 transitions. [2019-01-12 14:56:20,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-01-12 14:56:20,146 INFO L394 BasicCegarLoop]: Found error trace [2019-01-12 14:56:20,146 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-12 14:56:20,147 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-12 14:56:20,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-12 14:56:20,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1741315320, now seen corresponding path program 2 times [2019-01-12 14:56:20,147 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-12 14:56:20,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-12 14:56:20,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 14:56:20,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-12 14:56:20,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 14:56:20,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-12 14:56:20,252 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-01-12 14:56:20,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-12 14:56:20,253 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-01-12 14:56:20,269 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-01-12 14:56:20,295 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-01-12 14:56:20,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-12 14:56:20,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-12 14:56:20,306 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-01-12 14:56:20,324 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-01-12 14:56:20,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2019-01-12 14:56:20,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-12 14:56:20,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-12 14:56:20,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-01-12 14:56:20,326 INFO L87 Difference]: Start difference. First operand 41 states and 59 transitions. Second operand 4 states. [2019-01-12 14:56:20,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-12 14:56:20,405 INFO L93 Difference]: Finished difference Result 84 states and 147 transitions. [2019-01-12 14:56:20,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-12 14:56:20,406 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-01-12 14:56:20,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-12 14:56:20,409 INFO L225 Difference]: With dead ends: 84 [2019-01-12 14:56:20,410 INFO L226 Difference]: Without dead ends: 47 [2019-01-12 14:56:20,412 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-01-12 14:56:20,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-01-12 14:56:20,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-01-12 14:56:20,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-01-12 14:56:20,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 71 transitions. [2019-01-12 14:56:20,429 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 71 transitions. Word has length 25 [2019-01-12 14:56:20,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-12 14:56:20,429 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 71 transitions. [2019-01-12 14:56:20,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-12 14:56:20,429 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 71 transitions. [2019-01-12 14:56:20,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-01-12 14:56:20,432 INFO L394 BasicCegarLoop]: Found error trace [2019-01-12 14:56:20,432 INFO L402 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] [2019-01-12 14:56:20,432 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-12 14:56:20,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-12 14:56:20,435 INFO L82 PathProgramCache]: Analyzing trace with hash -781004688, now seen corresponding path program 1 times [2019-01-12 14:56:20,435 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-12 14:56:20,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-12 14:56:20,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 14:56:20,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-12 14:56:20,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 14:56:20,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-12 14:56:20,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-12 14:56:20,507 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2019-01-12 14:56:20,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.01 02:56:20 BoogieIcfgContainer [2019-01-12 14:56:20,540 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-01-12 14:56:20,541 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-01-12 14:56:20,541 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-01-12 14:56:20,541 INFO L276 PluginConnector]: Witness Printer initialized [2019-01-12 14:56:20,542 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.01 02:56:18" (3/4) ... [2019-01-12 14:56:20,544 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2019-01-12 14:56:20,596 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-01-12 14:56:20,597 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-01-12 14:56:20,597 INFO L168 Benchmark]: Toolchain (without parser) took 2683.57 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 111.7 MB). Free memory was 952.7 MB in the beginning and 991.2 MB in the end (delta: -38.5 MB). Peak memory consumption was 73.2 MB. Max. memory is 11.5 GB. [2019-01-12 14:56:20,599 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-12 14:56:20,600 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.46 ms. Allocated memory is still 1.0 GB. Free memory was 952.7 MB in the beginning and 941.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-01-12 14:56:20,600 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.90 ms. Allocated memory is still 1.0 GB. Free memory is still 941.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-12 14:56:20,601 INFO L168 Benchmark]: Boogie Preprocessor took 19.40 ms. Allocated memory is still 1.0 GB. Free memory is still 941.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-12 14:56:20,601 INFO L168 Benchmark]: RCFGBuilder took 367.97 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 111.7 MB). Free memory was 941.9 MB in the beginning and 1.1 GB in the end (delta: -143.9 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2019-01-12 14:56:20,602 INFO L168 Benchmark]: TraceAbstraction took 1938.39 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 998.0 MB in the end (delta: 87.8 MB). Peak memory consumption was 87.8 MB. Max. memory is 11.5 GB. [2019-01-12 14:56:20,603 INFO L168 Benchmark]: Witness Printer took 55.84 ms. Allocated memory is still 1.1 GB. Free memory was 998.0 MB in the beginning and 991.2 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. [2019-01-12 14:56:20,607 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 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 256.46 ms. Allocated memory is still 1.0 GB. Free memory was 952.7 MB in the beginning and 941.9 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 33.90 ms. Allocated memory is still 1.0 GB. Free memory is still 941.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.40 ms. Allocated memory is still 1.0 GB. Free memory is still 941.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 367.97 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 111.7 MB). Free memory was 941.9 MB in the beginning and 1.1 GB in the end (delta: -143.9 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1938.39 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 998.0 MB in the end (delta: 87.8 MB). Peak memory consumption was 87.8 MB. Max. memory is 11.5 GB. * Witness Printer took 55.84 ms. Allocated memory is still 1.1 GB. Free memory was 998.0 MB in the beginning and 991.2 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 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) [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] return n+1; VAL [\old(m)=0, \old(n)=1, \result=2, m=0, n=1] [L19] RET, EXPR ackermann(m-1,1) VAL [\old(m)=1, \old(n)=0, ackermann(m-1,1)=2, m=1, n=0] [L19] return ackermann(m-1,1); [L21] RET, 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] return n+1; VAL [\old(m)=0, \old(n)=2, \result=3, m=0, n=2] [L21] RET, 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] return ackermann(m-1,ackermann(m,n-1)); [L19] RET, EXPR ackermann(m-1,1) VAL [\old(m)=2, \old(n)=0, ackermann(m-1,1)=3, m=2, n=0] [L19] return ackermann(m-1,1); [L39] RET, EXPR ackermann(m,n) [L39] int result = ackermann(m,n); [L40] COND FALSE !(m < 2 || result >= 4) [L43] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 1 error locations. UNSAFE Result, 1.8s OverallTime, 4 OverallIterations, 5 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 64 SDtfs, 55 SDslu, 106 SDs, 0 SdLazy, 129 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=3, 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: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 135 NumberOfCodeBlocks, 135 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 92 ConstructedInterpolants, 0 QuantifiedInterpolants, 3254 SizeOfPredicates, 4 NumberOfNonLiveVariables, 136 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 31/38 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...