./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/recursive/Fibonacci01_true-unreach-call_true-no-overflow.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2e94e6aa 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/Fibonacci01_true-unreach-call_true-no-overflow.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 0f8f22ce4f3bf9068fc0240f174785871ced813b ......................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-2e94e6a [2018-12-31 09:51:52,549 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-31 09:51:52,550 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-31 09:51:52,567 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-31 09:51:52,569 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-31 09:51:52,570 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-31 09:51:52,572 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-31 09:51:52,574 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-31 09:51:52,577 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-31 09:51:52,585 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-31 09:51:52,586 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-31 09:51:52,590 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-31 09:51:52,591 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-31 09:51:52,593 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-31 09:51:52,594 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-31 09:51:52,597 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-31 09:51:52,598 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-31 09:51:52,602 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-31 09:51:52,608 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-31 09:51:52,612 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-31 09:51:52,613 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-31 09:51:52,616 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-31 09:51:52,620 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-31 09:51:52,622 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-31 09:51:52,622 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-31 09:51:52,623 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-31 09:51:52,624 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-31 09:51:52,627 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-31 09:51:52,628 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-31 09:51:52,629 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-31 09:51:52,629 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-31 09:51:52,632 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-31 09:51:52,632 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-31 09:51:52,633 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-31 09:51:52,634 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-31 09:51:52,635 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-31 09:51:52,637 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-31 09:51:52,664 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-31 09:51:52,665 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-31 09:51:52,666 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-31 09:51:52,667 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-31 09:51:52,668 INFO L133 SettingsManager]: * Use SBE=true [2018-12-31 09:51:52,668 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-31 09:51:52,668 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-31 09:51:52,669 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-31 09:51:52,669 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-31 09:51:52,669 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-31 09:51:52,670 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-31 09:51:52,670 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-31 09:51:52,670 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-31 09:51:52,670 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-31 09:51:52,670 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-31 09:51:52,671 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-31 09:51:52,672 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-31 09:51:52,673 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-31 09:51:52,673 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-31 09:51:52,674 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-31 09:51:52,674 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-31 09:51:52,674 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-31 09:51:52,674 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-31 09:51:52,674 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-31 09:51:52,675 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-31 09:51:52,675 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-31 09:51:52,675 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-31 09:51:52,675 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-31 09:51:52,675 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 -> 0f8f22ce4f3bf9068fc0240f174785871ced813b [2018-12-31 09:51:52,728 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-31 09:51:52,745 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-31 09:51:52,751 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-31 09:51:52,753 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-31 09:51:52,753 INFO L276 PluginConnector]: CDTParser initialized [2018-12-31 09:51:52,754 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/recursive/Fibonacci01_true-unreach-call_true-no-overflow.c [2018-12-31 09:51:52,814 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b68032bd0/b1a332a69f7e4c3f9e7e1827e2177dbe/FLAG105ccc5f7 [2018-12-31 09:51:53,270 INFO L307 CDTParser]: Found 1 translation units. [2018-12-31 09:51:53,273 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/recursive/Fibonacci01_true-unreach-call_true-no-overflow.c [2018-12-31 09:51:53,282 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b68032bd0/b1a332a69f7e4c3f9e7e1827e2177dbe/FLAG105ccc5f7 [2018-12-31 09:51:53,622 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b68032bd0/b1a332a69f7e4c3f9e7e1827e2177dbe [2018-12-31 09:51:53,626 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-31 09:51:53,628 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-31 09:51:53,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-31 09:51:53,629 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-31 09:51:53,633 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-31 09:51:53,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 09:51:53" (1/1) ... [2018-12-31 09:51:53,638 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@488d0b16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:51:53, skipping insertion in model container [2018-12-31 09:51:53,638 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 09:51:53" (1/1) ... [2018-12-31 09:51:53,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-31 09:51:53,663 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-31 09:51:53,839 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 09:51:53,844 INFO L191 MainTranslator]: Completed pre-run [2018-12-31 09:51:53,863 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 09:51:53,879 INFO L195 MainTranslator]: Completed translation [2018-12-31 09:51:53,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:51:53 WrapperNode [2018-12-31 09:51:53,879 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-31 09:51:53,880 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-31 09:51:53,880 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-31 09:51:53,881 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-31 09:51:53,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:51:53" (1/1) ... [2018-12-31 09:51:53,898 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:51:53" (1/1) ... [2018-12-31 09:51:53,925 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-31 09:51:53,926 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-31 09:51:53,926 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-31 09:51:53,926 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-31 09:51:53,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:51:53" (1/1) ... [2018-12-31 09:51:53,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:51:53" (1/1) ... [2018-12-31 09:51:53,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:51:53" (1/1) ... [2018-12-31 09:51:53,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:51:53" (1/1) ... [2018-12-31 09:51:53,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:51:53" (1/1) ... [2018-12-31 09:51:53,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:51:53" (1/1) ... [2018-12-31 09:51:53,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:51:53" (1/1) ... [2018-12-31 09:51:53,955 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-31 09:51:53,956 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-31 09:51:53,956 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-31 09:51:53,956 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-31 09:51:53,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:51:53" (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 [2018-12-31 09:51:54,104 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2018-12-31 09:51:54,105 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2018-12-31 09:51:54,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-31 09:51:54,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-31 09:51:54,392 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-31 09:51:54,392 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-12-31 09:51:54,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 09:51:54 BoogieIcfgContainer [2018-12-31 09:51:54,393 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-31 09:51:54,394 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-31 09:51:54,394 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-31 09:51:54,397 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-31 09:51:54,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.12 09:51:53" (1/3) ... [2018-12-31 09:51:54,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60cc19d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 09:51:54, skipping insertion in model container [2018-12-31 09:51:54,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:51:53" (2/3) ... [2018-12-31 09:51:54,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60cc19d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 09:51:54, skipping insertion in model container [2018-12-31 09:51:54,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 09:51:54" (3/3) ... [2018-12-31 09:51:54,400 INFO L112 eAbstractionObserver]: Analyzing ICFG Fibonacci01_true-unreach-call_true-no-overflow.c [2018-12-31 09:51:54,411 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-31 09:51:54,418 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-31 09:51:54,436 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-31 09:51:54,468 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-31 09:51:54,469 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-31 09:51:54,469 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-31 09:51:54,469 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-31 09:51:54,469 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-31 09:51:54,470 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-31 09:51:54,470 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-31 09:51:54,470 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-31 09:51:54,470 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-31 09:51:54,487 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-12-31 09:51:54,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-31 09:51:54,493 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 09:51:54,494 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 09:51:54,497 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 09:51:54,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 09:51:54,503 INFO L82 PathProgramCache]: Analyzing trace with hash -337677157, now seen corresponding path program 1 times [2018-12-31 09:51:54,505 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 09:51:54,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 09:51:54,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 09:51:54,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 09:51:54,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 09:51:54,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 09:51:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 09:51:54,859 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 09:51:54,859 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-31 09:51:54,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-31 09:51:54,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-31 09:51:54,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-12-31 09:51:54,878 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 6 states. [2018-12-31 09:51:55,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 09:51:55,125 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2018-12-31 09:51:55,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-31 09:51:55,127 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-12-31 09:51:55,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 09:51:55,138 INFO L225 Difference]: With dead ends: 31 [2018-12-31 09:51:55,138 INFO L226 Difference]: Without dead ends: 18 [2018-12-31 09:51:55,141 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-12-31 09:51:55,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-12-31 09:51:55,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-12-31 09:51:55,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-31 09:51:55,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2018-12-31 09:51:55,189 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2018-12-31 09:51:55,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 09:51:55,189 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2018-12-31 09:51:55,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-31 09:51:55,190 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2018-12-31 09:51:55,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-31 09:51:55,192 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 09:51:55,192 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 09:51:55,193 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 09:51:55,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 09:51:55,193 INFO L82 PathProgramCache]: Analyzing trace with hash -461887010, now seen corresponding path program 1 times [2018-12-31 09:51:55,193 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 09:51:55,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 09:51:55,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 09:51:55,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 09:51:55,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 09:51:55,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 09:51:55,469 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-31 09:51:55,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 09:51:55,469 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 [2018-12-31 09:51:55,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 09:51:55,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 09:51:55,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 09:51:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-31 09:51:55,633 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-31 09:51:55,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2018-12-31 09:51:55,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-31 09:51:55,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-31 09:51:55,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-31 09:51:55,636 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 6 states. [2018-12-31 09:51:55,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 09:51:55,841 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2018-12-31 09:51:55,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-31 09:51:55,841 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2018-12-31 09:51:55,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 09:51:55,843 INFO L225 Difference]: With dead ends: 35 [2018-12-31 09:51:55,843 INFO L226 Difference]: Without dead ends: 20 [2018-12-31 09:51:55,845 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-12-31 09:51:55,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-12-31 09:51:55,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-12-31 09:51:55,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-31 09:51:55,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2018-12-31 09:51:55,853 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 23 [2018-12-31 09:51:55,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 09:51:55,853 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2018-12-31 09:51:55,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-31 09:51:55,854 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2018-12-31 09:51:55,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-12-31 09:51:55,855 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 09:51:55,855 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 09:51:55,856 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 09:51:55,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 09:51:55,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1032875874, now seen corresponding path program 1 times [2018-12-31 09:51:55,856 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 09:51:55,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 09:51:55,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 09:51:55,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 09:51:55,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 09:51:55,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 09:51:56,271 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-31 09:51:56,272 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 09:51:56,272 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 09:51:56,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 09:51:56,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 09:51:56,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 09:51:56,845 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-31 09:51:56,865 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 09:51:56,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2018-12-31 09:51:56,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-31 09:51:56,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-31 09:51:56,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-12-31 09:51:56,867 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 17 states. [2018-12-31 09:51:57,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 09:51:57,264 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2018-12-31 09:51:57,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-31 09:51:57,264 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2018-12-31 09:51:57,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 09:51:57,267 INFO L225 Difference]: With dead ends: 30 [2018-12-31 09:51:57,267 INFO L226 Difference]: Without dead ends: 26 [2018-12-31 09:51:57,268 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2018-12-31 09:51:57,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-12-31 09:51:57,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-12-31 09:51:57,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-31 09:51:57,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2018-12-31 09:51:57,278 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 24 [2018-12-31 09:51:57,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 09:51:57,279 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2018-12-31 09:51:57,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-31 09:51:57,280 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2018-12-31 09:51:57,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-31 09:51:57,282 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 09:51:57,282 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 09:51:57,282 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 09:51:57,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 09:51:57,283 INFO L82 PathProgramCache]: Analyzing trace with hash 498258551, now seen corresponding path program 2 times [2018-12-31 09:51:57,284 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 09:51:57,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 09:51:57,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 09:51:57,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 09:51:57,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 09:51:57,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 09:51:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-12-31 09:51:57,512 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 09:51:57,513 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 09:51:57,531 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 09:51:57,554 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 09:51:57,555 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 09:51:57,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 09:51:57,662 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-12-31 09:51:57,681 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 09:51:57,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2018-12-31 09:51:57,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-31 09:51:57,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-31 09:51:57,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-12-31 09:51:57,683 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 11 states. [2018-12-31 09:51:57,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 09:51:57,913 INFO L93 Difference]: Finished difference Result 50 states and 73 transitions. [2018-12-31 09:51:57,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-31 09:51:57,914 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2018-12-31 09:51:57,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 09:51:57,917 INFO L225 Difference]: With dead ends: 50 [2018-12-31 09:51:57,917 INFO L226 Difference]: Without dead ends: 28 [2018-12-31 09:51:57,918 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2018-12-31 09:51:57,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-31 09:51:57,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2018-12-31 09:51:57,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-31 09:51:57,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2018-12-31 09:51:57,928 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 37 [2018-12-31 09:51:57,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 09:51:57,929 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2018-12-31 09:51:57,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-31 09:51:57,930 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2018-12-31 09:51:57,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-12-31 09:51:57,932 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 09:51:57,932 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 09:51:57,933 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 09:51:57,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 09:51:57,933 INFO L82 PathProgramCache]: Analyzing trace with hash 2107265955, now seen corresponding path program 3 times [2018-12-31 09:51:57,933 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 09:51:57,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 09:51:57,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 09:51:57,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 09:51:57,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 09:51:57,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 09:51:58,140 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-12-31 09:51:58,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 09:51:58,141 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 09:51:58,158 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 09:51:58,178 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-31 09:51:58,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 09:51:58,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 09:51:58,449 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-31 09:51:58,467 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 09:51:58,468 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2018-12-31 09:51:58,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-31 09:51:58,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-31 09:51:58,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2018-12-31 09:51:58,470 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand 21 states. [2018-12-31 09:51:59,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 09:51:59,550 INFO L93 Difference]: Finished difference Result 39 states and 61 transitions. [2018-12-31 09:51:59,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-31 09:51:59,551 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 38 [2018-12-31 09:51:59,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 09:51:59,553 INFO L225 Difference]: With dead ends: 39 [2018-12-31 09:51:59,553 INFO L226 Difference]: Without dead ends: 0 [2018-12-31 09:51:59,556 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2018-12-31 09:51:59,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-31 09:51:59,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-31 09:51:59,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-31 09:51:59,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-31 09:51:59,558 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2018-12-31 09:51:59,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 09:51:59,558 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-31 09:51:59,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-31 09:51:59,558 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-31 09:51:59,558 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-31 09:51:59,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-31 09:51:59,797 WARN L181 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2018-12-31 09:51:59,803 INFO L448 ceAbstractionStarter]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2018-12-31 09:51:59,804 INFO L451 ceAbstractionStarter]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2018-12-31 09:51:59,804 INFO L444 ceAbstractionStarter]: At program point L20(line 20) the Hoare annotation is: (and (<= 2 fibonacci_~n) (= fibonacci_~n |fibonacci_#in~n|)) [2018-12-31 09:51:59,804 INFO L448 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2018-12-31 09:51:59,804 INFO L444 ceAbstractionStarter]: At program point L20-2(line 20) the Hoare annotation is: (or (and (<= 1 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 2) (<= 2 fibonacci_~n) (<= fibonacci_~n |fibonacci_#in~n|)) (and (<= 3 fibonacci_~n) (= fibonacci_~n |fibonacci_#in~n|) (<= fibonacci_~n (+ |fibonacci_#t~ret0| 2)))) [2018-12-31 09:51:59,805 INFO L448 ceAbstractionStarter]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2018-12-31 09:51:59,805 INFO L448 ceAbstractionStarter]: For program point L17(lines 17 21) no Hoare annotation was computed. [2018-12-31 09:51:59,805 INFO L448 ceAbstractionStarter]: For program point L20-3(line 20) no Hoare annotation was computed. [2018-12-31 09:51:59,805 INFO L448 ceAbstractionStarter]: For program point L15(lines 15 21) no Hoare annotation was computed. [2018-12-31 09:51:59,805 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-31 09:51:59,805 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed. [2018-12-31 09:51:59,805 INFO L448 ceAbstractionStarter]: For program point L31(lines 31 35) no Hoare annotation was computed. [2018-12-31 09:51:59,805 INFO L451 ceAbstractionStarter]: At program point L30(line 30) the Hoare annotation is: true [2018-12-31 09:51:59,806 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2018-12-31 09:51:59,806 INFO L448 ceAbstractionStarter]: For program point L30-1(line 30) no Hoare annotation was computed. [2018-12-31 09:51:59,806 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-31 09:51:59,806 INFO L448 ceAbstractionStarter]: For program point L27(lines 27 29) no Hoare annotation was computed. [2018-12-31 09:51:59,806 INFO L451 ceAbstractionStarter]: At program point L25(lines 25 36) the Hoare annotation is: true [2018-12-31 09:51:59,806 INFO L448 ceAbstractionStarter]: For program point L34(line 34) no Hoare annotation was computed. [2018-12-31 09:51:59,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.12 09:51:59 BoogieIcfgContainer [2018-12-31 09:51:59,813 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-31 09:51:59,814 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-31 09:51:59,814 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-31 09:51:59,814 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-31 09:51:59,815 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 09:51:54" (3/4) ... [2018-12-31 09:51:59,819 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-31 09:51:59,826 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibonacci [2018-12-31 09:51:59,831 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-12-31 09:51:59,832 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-31 09:51:59,881 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-12-31 09:51:59,881 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-31 09:51:59,882 INFO L168 Benchmark]: Toolchain (without parser) took 6255.59 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 210.2 MB). Free memory was 952.7 MB in the beginning and 1.2 GB in the end (delta: -237.7 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 09:51:59,883 INFO L168 Benchmark]: CDTParser took 0.16 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. [2018-12-31 09:51:59,884 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.77 ms. Allocated memory is still 1.0 GB. Free memory was 952.7 MB in the beginning and 942.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-31 09:51:59,885 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.08 ms. Allocated memory is still 1.0 GB. Free memory is still 942.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 09:51:59,886 INFO L168 Benchmark]: Boogie Preprocessor took 29.88 ms. Allocated memory is still 1.0 GB. Free memory is still 942.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 09:51:59,886 INFO L168 Benchmark]: RCFGBuilder took 437.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 942.0 MB in the beginning and 1.1 GB in the end (delta: -181.4 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. [2018-12-31 09:51:59,888 INFO L168 Benchmark]: TraceAbstraction took 5419.19 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 61.9 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -74.5 MB). Peak memory consumption was 310.1 MB. Max. memory is 11.5 GB. [2018-12-31 09:51:59,889 INFO L168 Benchmark]: Witness Printer took 67.66 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 7.4 MB). Peak memory consumption was 7.4 MB. Max. memory is 11.5 GB. [2018-12-31 09:51:59,894 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 250.77 ms. Allocated memory is still 1.0 GB. Free memory was 952.7 MB in the beginning and 942.0 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 45.08 ms. Allocated memory is still 1.0 GB. Free memory is still 942.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 29.88 ms. Allocated memory is still 1.0 GB. Free memory is still 942.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 437.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 942.0 MB in the beginning and 1.1 GB in the end (delta: -181.4 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5419.19 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 61.9 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -74.5 MB). Peak memory consumption was 310.1 MB. Max. memory is 11.5 GB. * Witness Printer took 67.66 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 7.4 MB). Peak memory consumption was 7.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 34]: 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 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 19 locations, 1 error locations. SAFE Result, 5.3s OverallTime, 5 OverallIterations, 5 TraceHistogramMax, 2.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.2s HoareAnnotationTime, HoareTripleCheckerStatistics: 67 SDtfs, 65 SDslu, 230 SDs, 0 SdLazy, 571 SolverSat, 66 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 196 GetRequests, 117 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 32 PreInvPairs, 49 NumberOfFragments, 36 HoareAnnotationTreeSize, 32 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 53 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 254 NumberOfCodeBlocks, 246 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 245 ConstructedInterpolants, 0 QuantifiedInterpolants, 20220 SizeOfPredicates, 13 NumberOfNonLiveVariables, 270 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 167/244 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...