./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/afterrec_2calls_false-unreach-call_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_9577c97f-eeab-40d7-b4c2-b7c0666546d4/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_9577c97f-eeab-40d7-b4c2-b7c0666546d4/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_9577c97f-eeab-40d7-b4c2-b7c0666546d4/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_9577c97f-eeab-40d7-b4c2-b7c0666546d4/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/afterrec_2calls_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_9577c97f-eeab-40d7-b4c2-b7c0666546d4/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_9577c97f-eeab-40d7-b4c2-b7c0666546d4/bin-2019/uautomizer --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 7757e3f263599cd02799bfad01adb3bcaa895e82 ................................................................................................................................................................................................................................................................................. 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 20:58:09,838 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 20:58:09,840 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 20:58:09,849 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 20:58:09,849 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 20:58:09,850 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 20:58:09,851 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 20:58:09,853 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 20:58:09,854 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 20:58:09,855 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 20:58:09,856 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 20:58:09,856 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 20:58:09,856 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 20:58:09,857 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 20:58:09,858 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 20:58:09,859 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 20:58:09,859 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 20:58:09,861 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 20:58:09,862 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 20:58:09,863 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 20:58:09,864 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 20:58:09,865 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 20:58:09,866 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 20:58:09,867 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 20:58:09,867 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 20:58:09,868 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 20:58:09,869 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 20:58:09,870 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 20:58:09,870 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 20:58:09,871 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 20:58:09,872 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 20:58:09,872 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 20:58:09,872 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 20:58:09,872 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 20:58:09,873 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 20:58:09,874 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 20:58:09,874 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_9577c97f-eeab-40d7-b4c2-b7c0666546d4/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-26 20:58:09,885 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 20:58:09,885 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 20:58:09,885 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 20:58:09,886 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 20:58:09,886 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 20:58:09,886 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 20:58:09,886 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 20:58:09,887 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 20:58:09,887 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 20:58:09,887 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 20:58:09,887 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 20:58:09,887 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 20:58:09,888 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 20:58:09,888 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 20:58:09,889 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 20:58:09,889 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 20:58:09,889 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 20:58:09,889 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 20:58:09,889 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 20:58:09,889 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 20:58:09,889 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 20:58:09,890 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 20:58:09,890 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 20:58:09,890 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 20:58:09,890 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 20:58:09,890 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 20:58:09,890 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 20:58:09,890 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 20:58:09,891 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 20:58:09,891 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 -> /tmp/vcloud-vcloud-master/worker/working_dir_9577c97f-eeab-40d7-b4c2-b7c0666546d4/bin-2019/uautomizer 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 -> 7757e3f263599cd02799bfad01adb3bcaa895e82 [2018-10-26 20:58:09,918 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 20:58:09,928 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 20:58:09,930 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 20:58:09,932 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 20:58:09,932 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 20:58:09,933 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_9577c97f-eeab-40d7-b4c2-b7c0666546d4/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/afterrec_2calls_false-unreach-call_true-termination.c [2018-10-26 20:58:09,976 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9577c97f-eeab-40d7-b4c2-b7c0666546d4/bin-2019/uautomizer/data/870e62661/c611534e44564869aa677c1963b756ec/FLAGe659251c8 [2018-10-26 20:58:10,348 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 20:58:10,349 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_9577c97f-eeab-40d7-b4c2-b7c0666546d4/sv-benchmarks/c/recursive-simple/afterrec_2calls_false-unreach-call_true-termination.c [2018-10-26 20:58:10,354 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9577c97f-eeab-40d7-b4c2-b7c0666546d4/bin-2019/uautomizer/data/870e62661/c611534e44564869aa677c1963b756ec/FLAGe659251c8 [2018-10-26 20:58:10,372 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_9577c97f-eeab-40d7-b4c2-b7c0666546d4/bin-2019/uautomizer/data/870e62661/c611534e44564869aa677c1963b756ec [2018-10-26 20:58:10,375 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 20:58:10,376 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 20:58:10,377 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 20:58:10,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 20:58:10,380 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 20:58:10,381 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:58:10" (1/1) ... [2018-10-26 20:58:10,383 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2547b47a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:58:10, skipping insertion in model container [2018-10-26 20:58:10,383 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:58:10" (1/1) ... [2018-10-26 20:58:10,391 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 20:58:10,403 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 20:58:10,510 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 20:58:10,512 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 20:58:10,522 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 20:58:10,532 INFO L193 MainTranslator]: Completed translation [2018-10-26 20:58:10,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:58:10 WrapperNode [2018-10-26 20:58:10,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 20:58:10,533 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 20:58:10,533 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 20:58:10,534 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 20:58:10,545 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:58:10" (1/1) ... [2018-10-26 20:58:10,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:58:10" (1/1) ... [2018-10-26 20:58:10,553 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:58:10" (1/1) ... [2018-10-26 20:58:10,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:58:10" (1/1) ... [2018-10-26 20:58:10,555 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:58:10" (1/1) ... [2018-10-26 20:58:10,559 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:58:10" (1/1) ... [2018-10-26 20:58:10,560 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:58:10" (1/1) ... [2018-10-26 20:58:10,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 20:58:10,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 20:58:10,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 20:58:10,562 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 20:58:10,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:58:10" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9577c97f-eeab-40d7-b4c2-b7c0666546d4/bin-2019/uautomizer/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 20:58:10,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 20:58:10,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 20:58:10,696 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2018-10-26 20:58:10,696 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2018-10-26 20:58:10,696 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 20:58:10,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-10-26 20:58:10,696 INFO L130 BoogieDeclarations]: Found specification of procedure f [2018-10-26 20:58:10,696 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2018-10-26 20:58:10,696 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 20:58:10,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 20:58:10,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 20:58:10,872 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 20:58:10,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:58:10 BoogieIcfgContainer [2018-10-26 20:58:10,873 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 20:58:10,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 20:58:10,874 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 20:58:10,877 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 20:58:10,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:58:10" (1/3) ... [2018-10-26 20:58:10,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@589a4c6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:58:10, skipping insertion in model container [2018-10-26 20:58:10,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:58:10" (2/3) ... [2018-10-26 20:58:10,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@589a4c6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:58:10, skipping insertion in model container [2018-10-26 20:58:10,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:58:10" (3/3) ... [2018-10-26 20:58:10,880 INFO L112 eAbstractionObserver]: Analyzing ICFG afterrec_2calls_false-unreach-call_true-termination.c [2018-10-26 20:58:10,886 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 20:58:10,893 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-10-26 20:58:10,906 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2018-10-26 20:58:10,930 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 20:58:10,931 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 20:58:10,931 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 20:58:10,931 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 20:58:10,931 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 20:58:10,932 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 20:58:10,932 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 20:58:10,932 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 20:58:10,932 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 20:58:10,948 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2018-10-26 20:58:10,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-26 20:58:10,953 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:58:10,954 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:58:10,956 INFO L424 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION, f2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:58:10,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:58:10,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1662209305, now seen corresponding path program 1 times [2018-10-26 20:58:10,963 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:58:10,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:58:11,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:58:11,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:58:11,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:58:11,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:58:11,380 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 20:58:11,382 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 20:58:11,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-10-26 20:58:11,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 20:58:11,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 20:58:11,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-10-26 20:58:11,395 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 7 states. [2018-10-26 20:58:11,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:58:11,538 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2018-10-26 20:58:11,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-26 20:58:11,540 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2018-10-26 20:58:11,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:58:11,547 INFO L225 Difference]: With dead ends: 34 [2018-10-26 20:58:11,547 INFO L226 Difference]: Without dead ends: 22 [2018-10-26 20:58:11,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-10-26 20:58:11,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-26 20:58:11,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-26 20:58:11,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-26 20:58:11,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-26 20:58:11,578 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 13 [2018-10-26 20:58:11,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:58:11,579 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-26 20:58:11,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-26 20:58:11,579 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-26 20:58:11,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-26 20:58:11,579 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:58:11,580 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:58:11,580 INFO L424 AbstractCegarLoop]: === Iteration 2 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION, f2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:58:11,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:58:11,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1078403623, now seen corresponding path program 1 times [2018-10-26 20:58:11,580 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:58:11,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:58:11,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:58:11,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:58:11,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:58:11,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 20:58:11,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 20:58:11,613 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-26 20:58:11,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 08:58:11 BoogieIcfgContainer [2018-10-26 20:58:11,635 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 20:58:11,635 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-26 20:58:11,635 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-26 20:58:11,636 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-26 20:58:11,636 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:58:10" (3/4) ... [2018-10-26 20:58:11,638 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-10-26 20:58:11,668 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_9577c97f-eeab-40d7-b4c2-b7c0666546d4/bin-2019/uautomizer/witness.graphml [2018-10-26 20:58:11,669 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-26 20:58:11,669 INFO L168 Benchmark]: Toolchain (without parser) took 1294.18 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.6 MB). Free memory was 961.1 MB in the beginning and 1.1 GB in the end (delta: -115.7 MB). Peak memory consumption was 15.9 MB. Max. memory is 11.5 GB. [2018-10-26 20:58:11,671 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 20:58:11,671 INFO L168 Benchmark]: CACSL2BoogieTranslator took 156.45 ms. Allocated memory is still 1.0 GB. Free memory was 961.1 MB in the beginning and 950.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-26 20:58:11,672 INFO L168 Benchmark]: Boogie Preprocessor took 28.25 ms. Allocated memory is still 1.0 GB. Free memory is still 950.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 20:58:11,672 INFO L168 Benchmark]: RCFGBuilder took 311.17 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.6 MB). Free memory was 950.4 MB in the beginning and 1.1 GB in the end (delta: -168.7 MB). Peak memory consumption was 23.6 MB. Max. memory is 11.5 GB. [2018-10-26 20:58:11,673 INFO L168 Benchmark]: TraceAbstraction took 761.45 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 38.6 MB). Peak memory consumption was 38.6 MB. Max. memory is 11.5 GB. [2018-10-26 20:58:11,673 INFO L168 Benchmark]: Witness Printer took 33.31 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.7 MB). Peak memory consumption was 3.7 MB. Max. memory is 11.5 GB. [2018-10-26 20:58:11,677 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 156.45 ms. Allocated memory is still 1.0 GB. Free memory was 961.1 MB in the beginning and 950.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 28.25 ms. Allocated memory is still 1.0 GB. Free memory is still 950.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 311.17 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.6 MB). Free memory was 950.4 MB in the beginning and 1.1 GB in the end (delta: -168.7 MB). Peak memory consumption was 23.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 761.45 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 38.6 MB). Peak memory consumption was 38.6 MB. Max. memory is 11.5 GB. * Witness Printer took 33.31 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.7 MB). Peak memory consumption was 3.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L21] CALL f(4) VAL [\old(n)=4] [L7] COND FALSE !(n<3) [L8] n-- VAL [\old(n)=4, n=3] [L9] CALL f2(n) VAL [\old(n)=3] [L14] COND FALSE !(n<3) [L15] n-- VAL [\old(n)=3, n=2] [L16] CALL f(n) VAL [\old(n)=2] [L7] COND TRUE, RET n<3 VAL [\old(n)=2, n=2] [L16] f(n) VAL [\old(n)=3, n=2] [L17] __VERIFIER_error() VAL [\old(n)=3, n=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 2 error locations. UNSAFE Result, 0.7s OverallTime, 2 OverallIterations, 2 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 14 SDtfs, 3 SDslu, 61 SDs, 0 SdLazy, 33 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 29 NumberOfCodeBlocks, 29 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 288 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...