./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/recursive-simple/afterrec_2calls_false-unreach-call_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-simple/afterrec_2calls_false-unreach-call_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 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 0.1.24-0ed9222-m [2019-01-12 14:56:47,453 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-12 14:56:47,455 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-12 14:56:47,466 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-12 14:56:47,467 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-12 14:56:47,468 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-12 14:56:47,469 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-12 14:56:47,472 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-12 14:56:47,474 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-12 14:56:47,475 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-12 14:56:47,475 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-01-12 14:56:47,476 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-01-12 14:56:47,477 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-01-12 14:56:47,478 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-01-12 14:56:47,479 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-01-12 14:56:47,480 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-01-12 14:56:47,481 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-01-12 14:56:47,483 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-01-12 14:56:47,486 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2019-01-12 14:56:47,487 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-01-12 14:56:47,489 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-01-12 14:56:47,490 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-01-12 14:56:47,493 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-01-12 14:56:47,493 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-01-12 14:56:47,494 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-01-12 14:56:47,495 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-01-12 14:56:47,496 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-01-12 14:56:47,497 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-01-12 14:56:47,498 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2019-01-12 14:56:47,499 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-01-12 14:56:47,500 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2019-01-12 14:56:47,501 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-01-12 14:56:47,501 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-01-12 14:56:47,501 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2019-01-12 14:56:47,502 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2019-01-12 14:56:47,504 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2019-01-12 14:56:47,504 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-01-12 14:56:47,530 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-12 14:56:47,530 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-12 14:56:47,532 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-12 14:56:47,536 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-12 14:56:47,536 INFO L133 SettingsManager]: * Use SBE=true [2019-01-12 14:56:47,536 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-12 14:56:47,537 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-12 14:56:47,537 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-12 14:56:47,537 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-12 14:56:47,537 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-12 14:56:47,537 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-12 14:56:47,537 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-12 14:56:47,538 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-12 14:56:47,538 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-12 14:56:47,538 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-12 14:56:47,538 INFO L133 SettingsManager]: * Use constant arrays=true [2019-01-12 14:56:47,538 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-12 14:56:47,539 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-12 14:56:47,540 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-12 14:56:47,540 INFO L133 SettingsManager]: * To the following directory=./dump/ [2019-01-12 14:56:47,540 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-12 14:56:47,541 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-12 14:56:47,541 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-12 14:56:47,541 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-12 14:56:47,542 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-12 14:56:47,542 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2019-01-12 14:56:47,542 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-12 14:56:47,542 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-01-12 14:56:47,542 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 -> 7757e3f263599cd02799bfad01adb3bcaa895e82 [2019-01-12 14:56:47,603 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-12 14:56:47,619 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-12 14:56:47,623 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-12 14:56:47,625 INFO L271 PluginConnector]: Initializing CDTParser... [2019-01-12 14:56:47,625 INFO L276 PluginConnector]: CDTParser initialized [2019-01-12 14:56:47,626 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/recursive-simple/afterrec_2calls_false-unreach-call_true-termination.c [2019-01-12 14:56:47,687 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2c5c07bf/08107fa5210b413b863b08add4aa7619/FLAG1590028f9 [2019-01-12 14:56:48,082 INFO L307 CDTParser]: Found 1 translation units. [2019-01-12 14:56:48,083 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/recursive-simple/afterrec_2calls_false-unreach-call_true-termination.c [2019-01-12 14:56:48,089 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2c5c07bf/08107fa5210b413b863b08add4aa7619/FLAG1590028f9 [2019-01-12 14:56:48,482 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2c5c07bf/08107fa5210b413b863b08add4aa7619 [2019-01-12 14:56:48,486 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-12 14:56:48,489 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-01-12 14:56:48,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-01-12 14:56:48,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-01-12 14:56:48,494 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2019-01-12 14:56:48,495 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.01 02:56:48" (1/1) ... [2019-01-12 14:56:48,499 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d896b9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:48, skipping insertion in model container [2019-01-12 14:56:48,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.01 02:56:48" (1/1) ... [2019-01-12 14:56:48,510 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-01-12 14:56:48,528 INFO L176 MainTranslator]: Built tables and reachable declarations [2019-01-12 14:56:48,672 INFO L208 PostProcessor]: Analyzing one entry point: main [2019-01-12 14:56:48,676 INFO L191 MainTranslator]: Completed pre-run [2019-01-12 14:56:48,688 INFO L208 PostProcessor]: Analyzing one entry point: main [2019-01-12 14:56:48,700 INFO L195 MainTranslator]: Completed translation [2019-01-12 14:56:48,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:48 WrapperNode [2019-01-12 14:56:48,701 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-01-12 14:56:48,702 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-12 14:56:48,702 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-12 14:56:48,702 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-12 14:56:48,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:48" (1/1) ... [2019-01-12 14:56:48,715 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:48" (1/1) ... [2019-01-12 14:56:48,729 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-12 14:56:48,729 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-12 14:56:48,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-12 14:56:48,729 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-12 14:56:48,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:48" (1/1) ... [2019-01-12 14:56:48,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:48" (1/1) ... [2019-01-12 14:56:48,737 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:48" (1/1) ... [2019-01-12 14:56:48,737 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:48" (1/1) ... [2019-01-12 14:56:48,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:48" (1/1) ... [2019-01-12 14:56:48,740 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:48" (1/1) ... [2019-01-12 14:56:48,741 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:48" (1/1) ... [2019-01-12 14:56:48,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-12 14:56:48,742 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-12 14:56:48,742 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-12 14:56:48,742 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-12 14:56:48,743 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:48" (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 14:56:48,854 INFO L130 BoogieDeclarations]: Found specification of procedure f [2019-01-12 14:56:48,854 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2019-01-12 14:56:48,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-12 14:56:48,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-12 14:56:48,855 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2019-01-12 14:56:48,855 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2019-01-12 14:56:49,029 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-12 14:56:49,030 INFO L286 CfgBuilder]: Removed 4 assue(true) statements. [2019-01-12 14:56:49,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.01 02:56:49 BoogieIcfgContainer [2019-01-12 14:56:49,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-12 14:56:49,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-12 14:56:49,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-12 14:56:49,034 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-12 14:56:49,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.01 02:56:48" (1/3) ... [2019-01-12 14:56:49,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58e6bbf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.01 02:56:49, skipping insertion in model container [2019-01-12 14:56:49,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:48" (2/3) ... [2019-01-12 14:56:49,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58e6bbf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.01 02:56:49, skipping insertion in model container [2019-01-12 14:56:49,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.01 02:56:49" (3/3) ... [2019-01-12 14:56:49,038 INFO L112 eAbstractionObserver]: Analyzing ICFG afterrec_2calls_false-unreach-call_true-termination.c [2019-01-12 14:56:49,046 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-12 14:56:49,052 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-01-12 14:56:49,064 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-01-12 14:56:49,093 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2019-01-12 14:56:49,093 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-12 14:56:49,094 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-12 14:56:49,094 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-12 14:56:49,094 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-12 14:56:49,094 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-12 14:56:49,094 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-12 14:56:49,094 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-12 14:56:49,094 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-12 14:56:49,110 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-01-12 14:56:49,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-01-12 14:56:49,115 INFO L394 BasicCegarLoop]: Found error trace [2019-01-12 14:56:49,116 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-12 14:56:49,118 INFO L423 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION, f2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-12 14:56:49,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-12 14:56:49,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1282022558, now seen corresponding path program 1 times [2019-01-12 14:56:49,126 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-12 14:56:49,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-12 14:56:49,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 14:56:49,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-12 14:56:49,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 14:56:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-12 14:56:49,476 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 14:56:49,479 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-12 14:56:49,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-01-12 14:56:49,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-01-12 14:56:49,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-01-12 14:56:49,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-01-12 14:56:49,495 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 7 states. [2019-01-12 14:56:49,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-12 14:56:49,708 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2019-01-12 14:56:49,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-12 14:56:49,710 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-01-12 14:56:49,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-12 14:56:49,718 INFO L225 Difference]: With dead ends: 30 [2019-01-12 14:56:49,718 INFO L226 Difference]: Without dead ends: 19 [2019-01-12 14:56:49,721 INFO L631 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 [2019-01-12 14:56:49,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-01-12 14:56:49,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-01-12 14:56:49,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-01-12 14:56:49,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-01-12 14:56:49,757 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 10 [2019-01-12 14:56:49,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-12 14:56:49,757 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-01-12 14:56:49,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-01-12 14:56:49,758 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-01-12 14:56:49,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-01-12 14:56:49,759 INFO L394 BasicCegarLoop]: Found error trace [2019-01-12 14:56:49,759 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-12 14:56:49,760 INFO L423 AbstractCegarLoop]: === Iteration 2 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION, f2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-12 14:56:49,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-12 14:56:49,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1404533112, now seen corresponding path program 1 times [2019-01-12 14:56:49,760 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-12 14:56:49,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-12 14:56:49,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 14:56:49,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-12 14:56:49,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 14:56:49,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-12 14:56:49,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-12 14:56:49,798 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2019-01-12 14:56:49,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.01 02:56:49 BoogieIcfgContainer [2019-01-12 14:56:49,819 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-01-12 14:56:49,819 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-01-12 14:56:49,820 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-01-12 14:56:49,820 INFO L276 PluginConnector]: Witness Printer initialized [2019-01-12 14:56:49,820 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.01 02:56:49" (3/4) ... [2019-01-12 14:56:49,823 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2019-01-12 14:56:49,869 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-01-12 14:56:49,869 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-01-12 14:56:49,871 INFO L168 Benchmark]: Toolchain (without parser) took 1383.40 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 947.3 MB in the beginning and 1.1 GB in the end (delta: -140.1 MB). Peak memory consumption was 4.0 MB. Max. memory is 11.5 GB. [2019-01-12 14:56:49,873 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 972.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-12 14:56:49,873 INFO L168 Benchmark]: CACSL2BoogieTranslator took 211.45 ms. Allocated memory is still 1.0 GB. Free memory was 947.3 MB in the beginning and 936.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-01-12 14:56:49,874 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.46 ms. Allocated memory is still 1.0 GB. Free memory is still 936.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-12 14:56:49,874 INFO L168 Benchmark]: Boogie Preprocessor took 12.39 ms. Allocated memory is still 1.0 GB. Free memory is still 936.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-12 14:56:49,875 INFO L168 Benchmark]: RCFGBuilder took 289.16 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 936.6 MB in the beginning and 1.1 GB in the end (delta: -185.6 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. [2019-01-12 14:56:49,876 INFO L168 Benchmark]: TraceAbstraction took 787.30 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: 34.7 MB). Peak memory consumption was 34.7 MB. Max. memory is 11.5 GB. [2019-01-12 14:56:49,877 INFO L168 Benchmark]: Witness Printer took 50.59 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-12 14:56:49,881 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 972.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 211.45 ms. Allocated memory is still 1.0 GB. Free memory was 947.3 MB in the beginning and 936.6 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 27.46 ms. Allocated memory is still 1.0 GB. Free memory is still 936.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.39 ms. Allocated memory is still 1.0 GB. Free memory is still 936.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 289.16 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 936.6 MB in the beginning and 1.1 GB in the end (delta: -185.6 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 787.30 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: 34.7 MB). Peak memory consumption was 34.7 MB. Max. memory is 11.5 GB. * Witness Printer took 50.59 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 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 n<3 VAL [\old(n)=2, n=2] [L16] RET f(n) VAL [\old(n)=3, n=2] [L17] __VERIFIER_error() VAL [\old(n)=3, n=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 19 locations, 2 error locations. UNSAFE Result, 0.7s OverallTime, 2 OverallIterations, 2 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 11 SDtfs, 3 SDslu, 46 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=19occurred 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, 0.2s InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 189 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...