./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/recursive-simple/id_i5_o5_false-unreach-call_true-termination.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-simple/id_i5_o5_false-unreach-call_true-termination.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bd8a40b9ab0ccbf5be4fcc211d81cb04996473fb .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-2e94e6a [2018-12-31 09:55:10,627 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-31 09:55:10,629 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-31 09:55:10,644 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-31 09:55:10,645 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-31 09:55:10,646 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-31 09:55:10,648 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-31 09:55:10,649 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-31 09:55:10,651 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-31 09:55:10,652 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-31 09:55:10,653 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-31 09:55:10,653 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-31 09:55:10,654 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-31 09:55:10,655 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-31 09:55:10,656 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-31 09:55:10,657 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-31 09:55:10,658 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-31 09:55:10,659 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-31 09:55:10,662 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-31 09:55:10,663 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-31 09:55:10,664 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-31 09:55:10,666 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-31 09:55:10,668 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-31 09:55:10,669 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-31 09:55:10,669 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-31 09:55:10,670 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-31 09:55:10,671 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-31 09:55:10,672 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-31 09:55:10,672 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-31 09:55:10,673 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-31 09:55:10,674 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-31 09:55:10,674 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-31 09:55:10,675 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-31 09:55:10,675 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-31 09:55:10,676 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-31 09:55:10,676 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-31 09:55:10,677 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-31 09:55:10,696 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-31 09:55:10,696 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-31 09:55:10,697 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-31 09:55:10,697 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-31 09:55:10,698 INFO L133 SettingsManager]: * Use SBE=true [2018-12-31 09:55:10,698 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-31 09:55:10,698 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-31 09:55:10,699 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-31 09:55:10,699 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-31 09:55:10,699 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-31 09:55:10,699 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-31 09:55:10,699 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-31 09:55:10,699 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-31 09:55:10,700 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-31 09:55:10,701 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-31 09:55:10,701 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-31 09:55:10,701 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-31 09:55:10,701 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-31 09:55:10,701 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-31 09:55:10,702 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-31 09:55:10,702 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-31 09:55:10,703 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-31 09:55:10,703 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-31 09:55:10,703 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-31 09:55:10,703 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-31 09:55:10,703 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-31 09:55:10,703 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-31 09:55:10,704 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-31 09:55:10,704 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 -> bd8a40b9ab0ccbf5be4fcc211d81cb04996473fb [2018-12-31 09:55:10,741 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-31 09:55:10,759 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-31 09:55:10,764 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-31 09:55:10,765 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-31 09:55:10,766 INFO L276 PluginConnector]: CDTParser initialized [2018-12-31 09:55:10,767 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/recursive-simple/id_i5_o5_false-unreach-call_true-termination.c [2018-12-31 09:55:10,837 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eeef50c23/acbe26f9ddae40cbaed61233837bb17e/FLAGbe01c9e10 [2018-12-31 09:55:11,293 INFO L307 CDTParser]: Found 1 translation units. [2018-12-31 09:55:11,294 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/recursive-simple/id_i5_o5_false-unreach-call_true-termination.c [2018-12-31 09:55:11,302 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eeef50c23/acbe26f9ddae40cbaed61233837bb17e/FLAGbe01c9e10 [2018-12-31 09:55:11,661 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eeef50c23/acbe26f9ddae40cbaed61233837bb17e [2018-12-31 09:55:11,666 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-31 09:55:11,669 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-31 09:55:11,671 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-31 09:55:11,672 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-31 09:55:11,678 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-31 09:55:11,679 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 09:55:11" (1/1) ... [2018-12-31 09:55:11,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ad84337 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:55:11, skipping insertion in model container [2018-12-31 09:55:11,683 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 09:55:11" (1/1) ... [2018-12-31 09:55:11,693 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-31 09:55:11,711 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-31 09:55:11,915 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 09:55:11,921 INFO L191 MainTranslator]: Completed pre-run [2018-12-31 09:55:11,942 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 09:55:11,961 INFO L195 MainTranslator]: Completed translation [2018-12-31 09:55:11,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:55:11 WrapperNode [2018-12-31 09:55:11,961 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-31 09:55:11,962 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-31 09:55:11,963 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-31 09:55:11,963 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-31 09:55:11,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:55:11" (1/1) ... [2018-12-31 09:55:11,980 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:55:11" (1/1) ... [2018-12-31 09:55:12,001 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-31 09:55:12,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-31 09:55:12,002 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-31 09:55:12,002 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-31 09:55:12,013 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:55:11" (1/1) ... [2018-12-31 09:55:12,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:55:11" (1/1) ... [2018-12-31 09:55:12,015 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:55:11" (1/1) ... [2018-12-31 09:55:12,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:55:11" (1/1) ... [2018-12-31 09:55:12,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:55:11" (1/1) ... [2018-12-31 09:55:12,021 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:55:11" (1/1) ... [2018-12-31 09:55:12,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:55:11" (1/1) ... [2018-12-31 09:55:12,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-31 09:55:12,024 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-31 09:55:12,024 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-31 09:55:12,024 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-31 09:55:12,026 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:55:11" (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 09:55:12,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-31 09:55:12,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-31 09:55:12,188 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-12-31 09:55:12,188 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-12-31 09:55:12,370 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-31 09:55:12,370 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-12-31 09:55:12,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 09:55:12 BoogieIcfgContainer [2018-12-31 09:55:12,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-31 09:55:12,372 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-31 09:55:12,372 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-31 09:55:12,376 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-31 09:55:12,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.12 09:55:11" (1/3) ... [2018-12-31 09:55:12,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13fbc138 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 09:55:12, skipping insertion in model container [2018-12-31 09:55:12,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:55:11" (2/3) ... [2018-12-31 09:55:12,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13fbc138 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 09:55:12, skipping insertion in model container [2018-12-31 09:55:12,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 09:55:12" (3/3) ... [2018-12-31 09:55:12,379 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i5_o5_false-unreach-call_true-termination.c [2018-12-31 09:55:12,390 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-31 09:55:12,397 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-31 09:55:12,415 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-31 09:55:12,448 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-31 09:55:12,449 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-31 09:55:12,449 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-31 09:55:12,449 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-31 09:55:12,449 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-31 09:55:12,449 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-31 09:55:12,450 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-31 09:55:12,450 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-31 09:55:12,450 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-31 09:55:12,468 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2018-12-31 09:55:12,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-31 09:55:12,475 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 09:55:12,476 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 09:55:12,478 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 09:55:12,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 09:55:12,485 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2018-12-31 09:55:12,487 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 09:55:12,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 09:55:12,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 09:55:12,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 09:55:12,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 09:55:12,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 09:55:12,786 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 09:55:12,789 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 09:55:12,789 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-31 09:55:12,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-31 09:55:12,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-31 09:55:12,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-31 09:55:12,810 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 5 states. [2018-12-31 09:55:12,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 09:55:12,963 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2018-12-31 09:55:12,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-31 09:55:12,965 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-12-31 09:55:12,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 09:55:12,976 INFO L225 Difference]: With dead ends: 24 [2018-12-31 09:55:12,976 INFO L226 Difference]: Without dead ends: 14 [2018-12-31 09:55:12,980 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-31 09:55:12,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-12-31 09:55:13,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-12-31 09:55:13,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-31 09:55:13,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-12-31 09:55:13,022 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2018-12-31 09:55:13,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 09:55:13,022 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-12-31 09:55:13,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-31 09:55:13,023 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-12-31 09:55:13,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-12-31 09:55:13,024 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 09:55:13,025 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 09:55:13,025 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 09:55:13,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 09:55:13,026 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2018-12-31 09:55:13,026 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 09:55:13,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 09:55:13,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 09:55:13,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 09:55:13,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 09:55:13,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 09:55:13,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-31 09:55:13,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 09:55:13,133 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 09:55:13,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 09:55:13,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 09:55:13,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 09:55:13,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-31 09:55:13,245 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 09:55:13,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-12-31 09:55:13,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-31 09:55:13,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-31 09:55:13,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-31 09:55:13,247 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 6 states. [2018-12-31 09:55:13,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 09:55:13,475 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-12-31 09:55:13,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-31 09:55:13,476 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2018-12-31 09:55:13,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 09:55:13,477 INFO L225 Difference]: With dead ends: 21 [2018-12-31 09:55:13,477 INFO L226 Difference]: Without dead ends: 17 [2018-12-31 09:55:13,479 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-12-31 09:55:13,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-12-31 09:55:13,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-12-31 09:55:13,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-31 09:55:13,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-12-31 09:55:13,489 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2018-12-31 09:55:13,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 09:55:13,490 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-12-31 09:55:13,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-31 09:55:13,490 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-12-31 09:55:13,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-12-31 09:55:13,491 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 09:55:13,491 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 09:55:13,491 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 09:55:13,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 09:55:13,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2018-12-31 09:55:13,492 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 09:55:13,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 09:55:13,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 09:55:13,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 09:55:13,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 09:55:13,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 09:55:13,751 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-31 09:55:13,752 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 09:55:13,752 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 09:55:13,772 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 09:55:13,806 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 09:55:13,807 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 09:55:13,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 09:55:13,829 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-31 09:55:13,853 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 09:55:13,853 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-12-31 09:55:13,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-31 09:55:13,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-31 09:55:13,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-12-31 09:55:13,855 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 7 states. [2018-12-31 09:55:14,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 09:55:14,012 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2018-12-31 09:55:14,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-31 09:55:14,017 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2018-12-31 09:55:14,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 09:55:14,018 INFO L225 Difference]: With dead ends: 24 [2018-12-31 09:55:14,018 INFO L226 Difference]: Without dead ends: 20 [2018-12-31 09:55:14,019 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-12-31 09:55:14,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-12-31 09:55:14,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-12-31 09:55:14,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-31 09:55:14,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-12-31 09:55:14,027 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2018-12-31 09:55:14,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 09:55:14,032 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-12-31 09:55:14,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-31 09:55:14,032 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-12-31 09:55:14,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-31 09:55:14,036 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 09:55:14,036 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 09:55:14,036 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 09:55:14,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 09:55:14,037 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2018-12-31 09:55:14,037 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 09:55:14,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 09:55:14,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 09:55:14,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 09:55:14,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 09:55:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 09:55:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-31 09:55:14,320 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 09:55:14,320 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 09:55:14,335 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 09:55:14,351 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-31 09:55:14,352 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 09:55:14,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 09:55:14,900 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-31 09:55:14,924 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 09:55:14,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2018-12-31 09:55:14,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-31 09:55:14,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-31 09:55:14,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2018-12-31 09:55:14,928 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 17 states. [2018-12-31 09:55:15,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 09:55:15,276 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-12-31 09:55:15,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-31 09:55:15,277 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 27 [2018-12-31 09:55:15,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 09:55:15,279 INFO L225 Difference]: With dead ends: 27 [2018-12-31 09:55:15,279 INFO L226 Difference]: Without dead ends: 23 [2018-12-31 09:55:15,280 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2018-12-31 09:55:15,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-31 09:55:15,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-12-31 09:55:15,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-31 09:55:15,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-12-31 09:55:15,286 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2018-12-31 09:55:15,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 09:55:15,286 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-12-31 09:55:15,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-31 09:55:15,287 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-12-31 09:55:15,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-31 09:55:15,288 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 09:55:15,288 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 09:55:15,289 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 09:55:15,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 09:55:15,289 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2018-12-31 09:55:15,289 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 09:55:15,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 09:55:15,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 09:55:15,291 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 09:55:15,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 09:55:15,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 09:55:15,427 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-12-31 09:55:15,427 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 09:55:15,427 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 09:55:15,444 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 09:55:15,457 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 09:55:15,457 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 09:55:15,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 09:55:15,481 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-12-31 09:55:15,501 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 09:55:15,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-12-31 09:55:15,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-31 09:55:15,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-31 09:55:15,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-12-31 09:55:15,503 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 9 states. [2018-12-31 09:55:15,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 09:55:15,738 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2018-12-31 09:55:15,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-31 09:55:15,741 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-12-31 09:55:15,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 09:55:15,742 INFO L225 Difference]: With dead ends: 30 [2018-12-31 09:55:15,742 INFO L226 Difference]: Without dead ends: 26 [2018-12-31 09:55:15,743 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-12-31 09:55:15,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-12-31 09:55:15,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-12-31 09:55:15,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-31 09:55:15,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-12-31 09:55:15,752 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2018-12-31 09:55:15,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 09:55:15,753 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-12-31 09:55:15,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-31 09:55:15,753 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-12-31 09:55:15,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-12-31 09:55:15,755 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 09:55:15,755 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 09:55:15,755 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 09:55:15,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 09:55:15,756 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2018-12-31 09:55:15,756 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 09:55:15,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 09:55:15,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 09:55:15,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 09:55:15,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 09:55:15,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-31 09:55:15,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-31 09:55:15,825 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-31 09:55:15,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.12 09:55:15 BoogieIcfgContainer [2018-12-31 09:55:15,859 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-31 09:55:15,859 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-31 09:55:15,859 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-31 09:55:15,860 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-31 09:55:15,860 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 09:55:12" (3/4) ... [2018-12-31 09:55:15,863 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-31 09:55:15,919 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-12-31 09:55:15,919 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-31 09:55:15,920 INFO L168 Benchmark]: Toolchain (without parser) took 4252.68 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 954.1 MB in the end (delta: -1.4 MB). Peak memory consumption was 143.3 MB. Max. memory is 11.5 GB. [2018-12-31 09:55:15,922 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 09:55:15,923 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.45 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 09:55:15,924 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.72 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 09:55:15,924 INFO L168 Benchmark]: Boogie Preprocessor took 21.97 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 09:55:15,925 INFO L168 Benchmark]: RCFGBuilder took 347.95 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.7 MB). Free memory was 942.0 MB in the beginning and 1.1 GB in the end (delta: -181.8 MB). Peak memory consumption was 25.2 MB. Max. memory is 11.5 GB. [2018-12-31 09:55:15,926 INFO L168 Benchmark]: TraceAbstraction took 3486.52 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 954.1 MB in the end (delta: 169.6 MB). Peak memory consumption was 169.6 MB. Max. memory is 11.5 GB. [2018-12-31 09:55:15,926 INFO L168 Benchmark]: Witness Printer took 59.95 ms. Allocated memory is still 1.2 GB. Free memory is still 954.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 09:55:15,939 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 290.45 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 38.72 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 21.97 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 347.95 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.7 MB). Free memory was 942.0 MB in the beginning and 1.1 GB in the end (delta: -181.8 MB). Peak memory consumption was 25.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3486.52 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 954.1 MB in the end (delta: 169.6 MB). Peak memory consumption was 169.6 MB. Max. memory is 11.5 GB. * Witness Printer took 59.95 ms. Allocated memory is still 1.2 GB. Free memory is still 954.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 5; [L11] CALL, EXPR id(input) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] int result = id(input); [L12] COND TRUE result == 5 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. UNSAFE Result, 3.4s OverallTime, 6 OverallIterations, 6 TraceHistogramMax, 1.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 47 SDtfs, 56 SDslu, 182 SDs, 0 SdLazy, 195 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=5, 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 240 NumberOfCodeBlocks, 235 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 192 ConstructedInterpolants, 0 QuantifiedInterpolants, 11080 SizeOfPredicates, 18 NumberOfNonLiveVariables, 216 ConjunctsInSsa, 36 ConjunctsInUnsatCore, 9 InterpolantComputations, 1 PerfectInterpolantSequences, 100/200 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...