./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/recursive-simple/afterrec_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 91b1670e 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_true-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 30601811463d073f869bef96a3132d41c5e6f5ce ............................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-91b1670 [2018-11-28 18:51:30,486 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 18:51:30,488 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 18:51:30,500 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 18:51:30,500 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 18:51:30,501 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 18:51:30,503 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 18:51:30,512 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 18:51:30,514 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 18:51:30,515 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 18:51:30,516 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 18:51:30,516 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 18:51:30,517 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 18:51:30,518 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 18:51:30,519 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 18:51:30,519 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 18:51:30,520 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 18:51:30,522 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 18:51:30,524 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 18:51:30,526 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 18:51:30,527 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 18:51:30,528 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 18:51:30,530 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 18:51:30,530 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 18:51:30,530 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 18:51:30,531 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 18:51:30,532 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 18:51:30,533 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 18:51:30,534 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 18:51:30,535 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 18:51:30,535 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 18:51:30,536 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 18:51:30,536 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 18:51:30,536 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 18:51:30,537 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 18:51:30,537 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 18:51:30,538 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 18:51:30,555 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 18:51:30,555 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 18:51:30,556 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 18:51:30,557 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 18:51:30,557 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 18:51:30,557 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 18:51:30,558 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 18:51:30,558 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 18:51:30,558 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 18:51:30,558 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 18:51:30,558 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 18:51:30,558 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 18:51:30,559 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 18:51:30,560 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 18:51:30,560 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 18:51:30,560 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 18:51:30,560 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 18:51:30,560 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 18:51:30,560 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 18:51:30,561 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 18:51:30,562 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 18:51:30,562 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 18:51:30,562 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 18:51:30,562 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 18:51:30,562 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 18:51:30,563 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 18:51:30,563 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 18:51:30,563 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 18:51:30,563 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 18:51:30,563 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 18:51:30,563 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 -> 30601811463d073f869bef96a3132d41c5e6f5ce [2018-11-28 18:51:30,620 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 18:51:30,636 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 18:51:30,642 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 18:51:30,644 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 18:51:30,644 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 18:51:30,645 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/recursive-simple/afterrec_true-unreach-call_true-termination.c [2018-11-28 18:51:30,707 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62d9c29f6/359ee7b2f7ad49a593e55727e561b6d5/FLAG2496ff2b2 [2018-11-28 18:51:31,187 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 18:51:31,188 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/recursive-simple/afterrec_true-unreach-call_true-termination.c [2018-11-28 18:51:31,194 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62d9c29f6/359ee7b2f7ad49a593e55727e561b6d5/FLAG2496ff2b2 [2018-11-28 18:51:31,530 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62d9c29f6/359ee7b2f7ad49a593e55727e561b6d5 [2018-11-28 18:51:31,535 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 18:51:31,536 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 18:51:31,538 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 18:51:31,538 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 18:51:31,542 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 18:51:31,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 06:51:31" (1/1) ... [2018-11-28 18:51:31,547 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16567499 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:31, skipping insertion in model container [2018-11-28 18:51:31,547 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 06:51:31" (1/1) ... [2018-11-28 18:51:31,556 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 18:51:31,573 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 18:51:31,743 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 18:51:31,747 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 18:51:31,764 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 18:51:31,781 INFO L195 MainTranslator]: Completed translation [2018-11-28 18:51:31,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:31 WrapperNode [2018-11-28 18:51:31,782 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 18:51:31,783 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 18:51:31,783 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 18:51:31,783 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 18:51:31,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:31" (1/1) ... [2018-11-28 18:51:31,801 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:31" (1/1) ... [2018-11-28 18:51:31,810 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 18:51:31,810 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 18:51:31,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 18:51:31,810 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 18:51:31,822 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:31" (1/1) ... [2018-11-28 18:51:31,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:31" (1/1) ... [2018-11-28 18:51:31,822 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:31" (1/1) ... [2018-11-28 18:51:31,823 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:31" (1/1) ... [2018-11-28 18:51:31,826 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:31" (1/1) ... [2018-11-28 18:51:31,829 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:31" (1/1) ... [2018-11-28 18:51:31,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:31" (1/1) ... [2018-11-28 18:51:31,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 18:51:31,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 18:51:31,832 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 18:51:31,832 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 18:51:31,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:31" (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 [2018-11-28 18:51:31,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 18:51:31,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 18:51:31,977 INFO L130 BoogieDeclarations]: Found specification of procedure f [2018-11-28 18:51:31,977 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2018-11-28 18:51:31,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 18:51:31,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 18:51:31,977 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 18:51:31,978 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 18:51:32,161 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 18:51:32,161 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-28 18:51:32,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:51:32 BoogieIcfgContainer [2018-11-28 18:51:32,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 18:51:32,163 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 18:51:32,163 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 18:51:32,167 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 18:51:32,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 06:51:31" (1/3) ... [2018-11-28 18:51:32,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4de5630 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 06:51:32, skipping insertion in model container [2018-11-28 18:51:32,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:31" (2/3) ... [2018-11-28 18:51:32,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4de5630 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 06:51:32, skipping insertion in model container [2018-11-28 18:51:32,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:51:32" (3/3) ... [2018-11-28 18:51:32,171 INFO L112 eAbstractionObserver]: Analyzing ICFG afterrec_true-unreach-call_true-termination.c [2018-11-28 18:51:32,182 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 18:51:32,190 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 18:51:32,208 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 18:51:32,240 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 18:51:32,241 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 18:51:32,242 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 18:51:32,242 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 18:51:32,242 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 18:51:32,242 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 18:51:32,242 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 18:51:32,242 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 18:51:32,242 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 18:51:32,262 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2018-11-28 18:51:32,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-28 18:51:32,269 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:32,270 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:32,273 INFO L423 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:32,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:32,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1715138264, now seen corresponding path program 1 times [2018-11-28 18:51:32,282 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:32,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:32,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:32,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:51:32,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:32,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:32,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-28 18:51:32,493 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:32,494 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:51:32,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:51:32,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:32,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:32,625 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-28 18:51:32,647 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-28 18:51:32,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2018-11-28 18:51:32,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 18:51:32,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 18:51:32,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-28 18:51:32,668 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2018-11-28 18:51:32,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:32,783 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2018-11-28 18:51:32,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 18:51:32,785 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-11-28 18:51:32,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:32,792 INFO L225 Difference]: With dead ends: 24 [2018-11-28 18:51:32,792 INFO L226 Difference]: Without dead ends: 0 [2018-11-28 18:51:32,796 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-28 18:51:32,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-28 18:51:32,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-28 18:51:32,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-28 18:51:32,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-28 18:51:32,824 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2018-11-28 18:51:32,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:32,824 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 18:51:32,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 18:51:32,825 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-28 18:51:32,825 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-28 18:51:32,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-28 18:51:32,894 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-28 18:51:32,894 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-28 18:51:32,894 INFO L448 ceAbstractionStarter]: For program point fErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2018-11-28 18:51:32,895 INFO L448 ceAbstractionStarter]: For program point fEXIT(lines 3 8) no Hoare annotation was computed. [2018-11-28 18:51:32,895 INFO L444 ceAbstractionStarter]: At program point L6(line 6) the Hoare annotation is: (< 2 |f_#in~n|) [2018-11-28 18:51:32,895 INFO L451 ceAbstractionStarter]: At program point fENTRY(lines 3 8) the Hoare annotation is: true [2018-11-28 18:51:32,895 INFO L448 ceAbstractionStarter]: For program point L6-1(lines 3 8) no Hoare annotation was computed. [2018-11-28 18:51:32,895 INFO L448 ceAbstractionStarter]: For program point L4(line 4) no Hoare annotation was computed. [2018-11-28 18:51:32,895 INFO L448 ceAbstractionStarter]: For program point fFINAL(lines 3 8) no Hoare annotation was computed. [2018-11-28 18:51:32,896 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-28 18:51:32,896 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-28 18:51:32,896 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-28 18:51:32,896 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-28 18:51:32,896 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 10 12) the Hoare annotation is: true [2018-11-28 18:51:32,897 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 10 12) no Hoare annotation was computed. [2018-11-28 18:51:32,897 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 10 12) no Hoare annotation was computed. [2018-11-28 18:51:32,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 06:51:32 BoogieIcfgContainer [2018-11-28 18:51:32,900 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 18:51:32,901 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 18:51:32,901 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 18:51:32,901 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 18:51:32,902 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:51:32" (3/4) ... [2018-11-28 18:51:32,905 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-28 18:51:32,911 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-28 18:51:32,912 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure f [2018-11-28 18:51:32,912 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-28 18:51:32,916 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2018-11-28 18:51:32,916 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-28 18:51:32,916 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-28 18:51:32,953 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-11-28 18:51:32,953 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 18:51:32,954 INFO L168 Benchmark]: Toolchain (without parser) took 1418.51 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.7 MB). Free memory was 952.7 MB in the beginning and 1.1 GB in the end (delta: -131.6 MB). Peak memory consumption was 13.1 MB. Max. memory is 11.5 GB. [2018-11-28 18:51:32,956 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:51:32,956 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.47 ms. Allocated memory is still 1.0 GB. Free memory was 952.7 MB in the beginning and 941.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-28 18:51:32,957 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.95 ms. Allocated memory is still 1.0 GB. Free memory is still 941.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:51:32,958 INFO L168 Benchmark]: Boogie Preprocessor took 21.07 ms. Allocated memory is still 1.0 GB. Free memory is still 941.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:51:32,958 INFO L168 Benchmark]: RCFGBuilder took 330.66 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.7 MB). Free memory was 941.9 MB in the beginning and 1.1 GB in the end (delta: -182.8 MB). Peak memory consumption was 24.9 MB. Max. memory is 11.5 GB. [2018-11-28 18:51:32,959 INFO L168 Benchmark]: TraceAbstraction took 737.17 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: 33.8 MB). Peak memory consumption was 33.8 MB. Max. memory is 11.5 GB. [2018-11-28 18:51:32,963 INFO L168 Benchmark]: Witness Printer took 52.28 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: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2018-11-28 18:51:32,970 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 244.47 ms. Allocated memory is still 1.0 GB. Free memory was 952.7 MB in the beginning and 941.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.95 ms. Allocated memory is still 1.0 GB. Free memory is still 941.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.07 ms. Allocated memory is still 1.0 GB. Free memory is still 941.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 330.66 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.7 MB). Free memory was 941.9 MB in the beginning and 1.1 GB in the end (delta: -182.8 MB). Peak memory consumption was 24.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 737.17 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: 33.8 MB). Peak memory consumption was 33.8 MB. Max. memory is 11.5 GB. * Witness Printer took 52.28 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: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 16 locations, 1 error locations. SAFE Result, 0.6s OverallTime, 1 OverallIterations, 3 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 9 SDtfs, 5 SDslu, 15 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred 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: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 8 PreInvPairs, 8 NumberOfFragments, 9 HoareAnnotationTreeSize, 8 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 32 NumberOfCodeBlocks, 32 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 570 SizeOfPredicates, 1 NumberOfNonLiveVariables, 38 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 10/14 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...