/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/recursive-simple/afterrec-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 09:21:46,767 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 09:21:46,770 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 09:21:46,816 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 09:21:46,817 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 09:21:46,822 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 09:21:46,826 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 09:21:46,834 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 09:21:46,838 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 09:21:46,844 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 09:21:46,849 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 09:21:46,850 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 09:21:46,851 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 09:21:46,854 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 09:21:46,856 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 09:21:46,858 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 09:21:46,860 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 09:21:46,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 09:21:46,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 09:21:46,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 09:21:46,885 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 09:21:46,887 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 09:21:46,890 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 09:21:46,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 09:21:46,903 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 09:21:46,908 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 09:21:46,909 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 09:21:46,912 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 09:21:46,913 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 09:21:46,914 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 09:21:46,915 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 09:21:46,916 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 09:21:46,924 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 09:21:46,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 09:21:46,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 09:21:46,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 09:21:46,929 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 09:21:47,001 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 09:21:47,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 09:21:47,006 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 09:21:47,006 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 09:21:47,007 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 09:21:47,007 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 09:21:47,007 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 09:21:47,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 09:21:47,008 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 09:21:47,008 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 09:21:47,009 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 09:21:47,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 09:21:47,010 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 09:21:47,011 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 09:21:47,011 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 09:21:47,011 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 09:21:47,011 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 09:21:47,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 09:21:47,012 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 09:21:47,012 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 09:21:47,012 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 09:21:47,013 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 09:21:47,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 09:21:47,013 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 09:21:47,013 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 09:21:47,014 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 09:21:47,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 09:21:47,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 09:21:47,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 09:21:47,501 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 09:21:47,502 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 09:21:47,503 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/afterrec-1.c [2020-12-23 09:21:47,595 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/bf60adbbe/00eb760ff0144be9aea12f3d44684c00/FLAGc4467e7b2 [2020-12-23 09:21:48,256 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 09:21:48,257 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/afterrec-1.c [2020-12-23 09:21:48,267 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/bf60adbbe/00eb760ff0144be9aea12f3d44684c00/FLAGc4467e7b2 [2020-12-23 09:21:48,615 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/bf60adbbe/00eb760ff0144be9aea12f3d44684c00 [2020-12-23 09:21:48,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 09:21:48,620 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 09:21:48,625 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 09:21:48,626 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 09:21:48,630 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 09:21:48,631 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:21:48" (1/1) ... [2020-12-23 09:21:48,634 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68afd02a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:48, skipping insertion in model container [2020-12-23 09:21:48,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:21:48" (1/1) ... [2020-12-23 09:21:48,643 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 09:21:48,658 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 09:21:48,799 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/afterrec-1.c[318,331] [2020-12-23 09:21:48,804 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:21:48,815 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 09:21:48,830 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/afterrec-1.c[318,331] [2020-12-23 09:21:48,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:21:48,848 INFO L208 MainTranslator]: Completed translation [2020-12-23 09:21:48,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:48 WrapperNode [2020-12-23 09:21:48,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 09:21:48,850 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 09:21:48,850 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 09:21:48,850 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 09:21:48,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:48" (1/1) ... [2020-12-23 09:21:48,871 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:48" (1/1) ... [2020-12-23 09:21:48,889 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 09:21:48,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 09:21:48,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 09:21:48,890 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 09:21:48,900 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:48" (1/1) ... [2020-12-23 09:21:48,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:48" (1/1) ... [2020-12-23 09:21:48,902 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:48" (1/1) ... [2020-12-23 09:21:48,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:48" (1/1) ... [2020-12-23 09:21:48,906 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:48" (1/1) ... [2020-12-23 09:21:48,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:48" (1/1) ... [2020-12-23 09:21:48,909 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:48" (1/1) ... [2020-12-23 09:21:48,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 09:21:48,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 09:21:48,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 09:21:48,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 09:21:48,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 09:21:49,029 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-12-23 09:21:49,031 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-12-23 09:21:49,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 09:21:49,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 09:21:49,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 09:21:49,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 09:21:49,276 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 09:21:49,277 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-23 09:21:49,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:21:49 BoogieIcfgContainer [2020-12-23 09:21:49,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 09:21:49,281 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 09:21:49,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 09:21:49,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 09:21:49,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 09:21:48" (1/3) ... [2020-12-23 09:21:49,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1062d04b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:21:49, skipping insertion in model container [2020-12-23 09:21:49,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:48" (2/3) ... [2020-12-23 09:21:49,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1062d04b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:21:49, skipping insertion in model container [2020-12-23 09:21:49,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:21:49" (3/3) ... [2020-12-23 09:21:49,291 INFO L111 eAbstractionObserver]: Analyzing ICFG afterrec-1.c [2020-12-23 09:21:49,298 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 09:21:49,303 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 09:21:49,324 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 09:21:49,353 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 09:21:49,354 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 09:21:49,354 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 09:21:49,354 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 09:21:49,354 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 09:21:49,354 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 09:21:49,354 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 09:21:49,355 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 09:21:49,372 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-12-23 09:21:49,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 09:21:49,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:21:49,379 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:21:49,379 INFO L429 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:21:49,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:21:49,386 INFO L82 PathProgramCache]: Analyzing trace with hash -2027498805, now seen corresponding path program 1 times [2020-12-23 09:21:49,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:21:49,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193172819] [2020-12-23 09:21:49,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:21:49,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 09:21:49,563 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 09:21:49,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 09:21:49,623 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 09:21:49,666 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 09:21:49,668 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 09:21:49,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 09:21:49,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 09:21:49 BoogieIcfgContainer [2020-12-23 09:21:49,722 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 09:21:49,726 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 09:21:49,726 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 09:21:49,726 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 09:21:49,727 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:21:49" (3/4) ... [2020-12-23 09:21:49,730 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-23 09:21:49,827 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive-simple/afterrec-1.c-witness.graphml [2020-12-23 09:21:49,828 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 09:21:49,831 INFO L168 Benchmark]: Toolchain (without parser) took 1209.38 ms. Allocated memory is still 162.5 MB. Free memory was 136.9 MB in the beginning and 100.2 MB in the end (delta: 36.7 MB). Peak memory consumption was 36.7 MB. Max. memory is 8.0 GB. [2020-12-23 09:21:49,831 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 162.5 MB. Free memory is still 137.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 09:21:49,835 INFO L168 Benchmark]: CACSL2BoogieTranslator took 223.67 ms. Allocated memory is still 162.5 MB. Free memory was 136.9 MB in the beginning and 128.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 09:21:49,837 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.16 ms. Allocated memory is still 162.5 MB. Free memory was 128.0 MB in the beginning and 126.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 09:21:49,841 INFO L168 Benchmark]: Boogie Preprocessor took 21.35 ms. Allocated memory is still 162.5 MB. Free memory was 126.9 MB in the beginning and 125.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 09:21:49,842 INFO L168 Benchmark]: RCFGBuilder took 367.37 ms. Allocated memory is still 162.5 MB. Free memory was 125.9 MB in the beginning and 114.9 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 09:21:49,843 INFO L168 Benchmark]: TraceAbstraction took 441.10 ms. Allocated memory is still 162.5 MB. Free memory was 114.8 MB in the beginning and 102.3 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-12-23 09:21:49,844 INFO L168 Benchmark]: Witness Printer took 102.20 ms. Allocated memory is still 162.5 MB. Free memory was 102.3 MB in the beginning and 100.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 09:21:49,854 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 162.5 MB. Free memory is still 137.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 223.67 ms. Allocated memory is still 162.5 MB. Free memory was 136.9 MB in the beginning and 128.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 39.16 ms. Allocated memory is still 162.5 MB. Free memory was 128.0 MB in the beginning and 126.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.35 ms. Allocated memory is still 162.5 MB. Free memory was 126.9 MB in the beginning and 125.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 367.37 ms. Allocated memory is still 162.5 MB. Free memory was 125.9 MB in the beginning and 114.9 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 441.10 ms. Allocated memory is still 162.5 MB. Free memory was 114.8 MB in the beginning and 102.3 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Witness Printer took 102.20 ms. Allocated memory is still 162.5 MB. Free memory was 102.3 MB in the beginning and 100.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 9]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L13] CALL f(4) VAL [\old(n)=4] [L6] COND FALSE !(n<3) [L7] n-- VAL [\old(n)=4, n=3] [L8] CALL f(n) VAL [\old(n)=3] [L6] COND FALSE !(n<3) [L7] n-- VAL [\old(n)=3, n=2] [L8] CALL f(n) VAL [\old(n)=2] [L6] COND TRUE n<3 VAL [\old(n)=2, n=2] [L8] RET f(n) VAL [\old(n)=3, n=2] [L9] reach_error() VAL [\old(n)=3, n=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 3, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...