./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/recursive-simple/id_o10_false-unreach-call_true-termination_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-simple/id_o10_false-unreach-call_true-termination_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 0c292d0c9d9c055df9398b3303a92d6621b60758 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 10:00:33,300 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-31 10:00:33,302 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-31 10:00:33,320 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-31 10:00:33,321 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-31 10:00:33,323 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-31 10:00:33,325 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-31 10:00:33,328 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-31 10:00:33,330 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-31 10:00:33,330 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-31 10:00:33,333 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-31 10:00:33,333 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-31 10:00:33,335 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-31 10:00:33,338 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-31 10:00:33,347 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-31 10:00:33,348 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-31 10:00:33,349 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-31 10:00:33,351 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-31 10:00:33,353 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-31 10:00:33,355 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-31 10:00:33,357 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-31 10:00:33,358 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-31 10:00:33,361 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-31 10:00:33,361 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-31 10:00:33,361 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-31 10:00:33,362 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-31 10:00:33,364 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-31 10:00:33,365 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-31 10:00:33,365 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-31 10:00:33,367 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-31 10:00:33,367 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-31 10:00:33,368 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-31 10:00:33,368 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-31 10:00:33,368 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-31 10:00:33,370 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-31 10:00:33,370 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-31 10:00:33,371 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-31 10:00:33,394 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-31 10:00:33,394 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-31 10:00:33,395 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-31 10:00:33,395 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-31 10:00:33,396 INFO L133 SettingsManager]: * Use SBE=true [2018-12-31 10:00:33,397 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-31 10:00:33,397 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-31 10:00:33,397 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-31 10:00:33,397 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-31 10:00:33,397 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-31 10:00:33,398 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-31 10:00:33,398 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-31 10:00:33,398 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-31 10:00:33,398 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-31 10:00:33,398 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-31 10:00:33,398 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-31 10:00:33,398 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-31 10:00:33,400 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-31 10:00:33,400 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-31 10:00:33,400 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-31 10:00:33,401 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-31 10:00:33,401 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-31 10:00:33,401 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-31 10:00:33,401 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-31 10:00:33,401 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-31 10:00:33,401 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-31 10:00:33,402 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-31 10:00:33,402 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-31 10:00:33,402 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 -> 0c292d0c9d9c055df9398b3303a92d6621b60758 [2018-12-31 10:00:33,445 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-31 10:00:33,458 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-31 10:00:33,462 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-31 10:00:33,463 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-31 10:00:33,464 INFO L276 PluginConnector]: CDTParser initialized [2018-12-31 10:00:33,464 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/recursive-simple/id_o10_false-unreach-call_true-termination_true-no-overflow.c [2018-12-31 10:00:33,531 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9beed4468/7508998e1fcb4285ba76e28a48cc9755/FLAGdb5cc64f8 [2018-12-31 10:00:34,038 INFO L307 CDTParser]: Found 1 translation units. [2018-12-31 10:00:34,039 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/recursive-simple/id_o10_false-unreach-call_true-termination_true-no-overflow.c [2018-12-31 10:00:34,044 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9beed4468/7508998e1fcb4285ba76e28a48cc9755/FLAGdb5cc64f8 [2018-12-31 10:00:34,387 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9beed4468/7508998e1fcb4285ba76e28a48cc9755 [2018-12-31 10:00:34,391 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-31 10:00:34,393 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-31 10:00:34,394 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-31 10:00:34,394 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-31 10:00:34,398 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-31 10:00:34,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 10:00:34" (1/1) ... [2018-12-31 10:00:34,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40fa3b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:00:34, skipping insertion in model container [2018-12-31 10:00:34,403 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 10:00:34" (1/1) ... [2018-12-31 10:00:34,413 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-31 10:00:34,432 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-31 10:00:34,633 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 10:00:34,638 INFO L191 MainTranslator]: Completed pre-run [2018-12-31 10:00:34,654 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 10:00:34,669 INFO L195 MainTranslator]: Completed translation [2018-12-31 10:00:34,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:00:34 WrapperNode [2018-12-31 10:00:34,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-31 10:00:34,671 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-31 10:00:34,671 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-31 10:00:34,671 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-31 10:00:34,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:00:34" (1/1) ... [2018-12-31 10:00:34,685 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:00:34" (1/1) ... [2018-12-31 10:00:34,705 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-31 10:00:34,706 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-31 10:00:34,706 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-31 10:00:34,706 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-31 10:00:34,717 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:00:34" (1/1) ... [2018-12-31 10:00:34,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:00:34" (1/1) ... [2018-12-31 10:00:34,718 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:00:34" (1/1) ... [2018-12-31 10:00:34,718 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:00:34" (1/1) ... [2018-12-31 10:00:34,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:00:34" (1/1) ... [2018-12-31 10:00:34,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:00:34" (1/1) ... [2018-12-31 10:00:34,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:00:34" (1/1) ... [2018-12-31 10:00:34,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-31 10:00:34,724 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-31 10:00:34,724 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-31 10:00:34,725 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-31 10:00:34,725 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:00:34" (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 10:00:34,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-31 10:00:34,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-31 10:00:34,864 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-12-31 10:00:34,864 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-12-31 10:00:35,043 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-31 10:00:35,043 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-12-31 10:00:35,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 10:00:35 BoogieIcfgContainer [2018-12-31 10:00:35,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-31 10:00:35,045 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-31 10:00:35,045 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-31 10:00:35,049 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-31 10:00:35,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.12 10:00:34" (1/3) ... [2018-12-31 10:00:35,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23faf7c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 10:00:35, skipping insertion in model container [2018-12-31 10:00:35,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:00:34" (2/3) ... [2018-12-31 10:00:35,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23faf7c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 10:00:35, skipping insertion in model container [2018-12-31 10:00:35,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 10:00:35" (3/3) ... [2018-12-31 10:00:35,052 INFO L112 eAbstractionObserver]: Analyzing ICFG id_o10_false-unreach-call_true-termination_true-no-overflow.c [2018-12-31 10:00:35,062 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-31 10:00:35,069 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-31 10:00:35,083 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-31 10:00:35,114 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-31 10:00:35,114 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-31 10:00:35,115 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-31 10:00:35,115 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-31 10:00:35,115 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-31 10:00:35,115 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-31 10:00:35,115 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-31 10:00:35,115 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-31 10:00:35,115 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-31 10:00:35,134 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2018-12-31 10:00:35,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-31 10:00:35,143 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:00:35,145 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:00:35,149 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:00:35,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:00:35,156 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2018-12-31 10:00:35,158 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:00:35,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:00:35,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:00:35,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:00:35,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:00:35,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:00:35,596 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 10:00:35,598 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 10:00:35,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-31 10:00:35,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-31 10:00:35,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-31 10:00:35,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-31 10:00:35,618 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 5 states. [2018-12-31 10:00:35,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:00:35,719 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-12-31 10:00:35,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-31 10:00:35,722 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-12-31 10:00:35,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:00:35,732 INFO L225 Difference]: With dead ends: 27 [2018-12-31 10:00:35,732 INFO L226 Difference]: Without dead ends: 14 [2018-12-31 10:00:35,735 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-31 10:00:35,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-12-31 10:00:35,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-12-31 10:00:35,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-31 10:00:35,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-12-31 10:00:35,776 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2018-12-31 10:00:35,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:00:35,777 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-12-31 10:00:35,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-31 10:00:35,777 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-12-31 10:00:35,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-12-31 10:00:35,779 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:00:35,779 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:00:35,780 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:00:35,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:00:35,780 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2018-12-31 10:00:35,780 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:00:35,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:00:35,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:00:35,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:00:35,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:00:35,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:00:36,093 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 9 [2018-12-31 10:00:36,098 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 10:00:36,098 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:00:36,098 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 10:00:36,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:00:36,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:00:36,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:00:36,252 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 10:00:36,282 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:00:36,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-12-31 10:00:36,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-31 10:00:36,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-31 10:00:36,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-12-31 10:00:36,285 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2018-12-31 10:00:36,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:00:36,338 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-12-31 10:00:36,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-31 10:00:36,341 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2018-12-31 10:00:36,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:00:36,342 INFO L225 Difference]: With dead ends: 21 [2018-12-31 10:00:36,342 INFO L226 Difference]: Without dead ends: 17 [2018-12-31 10:00:36,345 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-12-31 10:00:36,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-12-31 10:00:36,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-12-31 10:00:36,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-31 10:00:36,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-12-31 10:00:36,355 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2018-12-31 10:00:36,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:00:36,355 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-12-31 10:00:36,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-31 10:00:36,355 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-12-31 10:00:36,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-12-31 10:00:36,358 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:00:36,358 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:00:36,359 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:00:36,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:00:36,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2018-12-31 10:00:36,359 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:00:36,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:00:36,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:00:36,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:00:36,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:00:36,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:00:37,061 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 10:00:37,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:00:37,061 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 10:00:37,073 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 10:00:37,087 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 10:00:37,087 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:00:37,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:00:37,188 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 10:00:37,208 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:00:37,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-12-31 10:00:37,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-31 10:00:37,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-31 10:00:37,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2018-12-31 10:00:37,210 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 10 states. [2018-12-31 10:00:37,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:00:37,313 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2018-12-31 10:00:37,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-31 10:00:37,317 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2018-12-31 10:00:37,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:00:37,318 INFO L225 Difference]: With dead ends: 24 [2018-12-31 10:00:37,318 INFO L226 Difference]: Without dead ends: 20 [2018-12-31 10:00:37,319 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2018-12-31 10:00:37,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-12-31 10:00:37,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-12-31 10:00:37,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-31 10:00:37,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-12-31 10:00:37,326 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2018-12-31 10:00:37,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:00:37,327 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-12-31 10:00:37,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-31 10:00:37,327 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-12-31 10:00:37,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-31 10:00:37,329 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:00:37,329 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:00:37,329 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:00:37,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:00:37,330 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2018-12-31 10:00:37,330 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:00:37,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:00:37,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:00:37,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:00:37,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:00:37,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:00:37,936 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 10:00:37,936 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:00:37,936 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 10:00:37,951 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 10:00:37,978 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-31 10:00:37,978 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:00:37,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:00:38,034 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 10:00:38,056 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:00:38,057 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-12-31 10:00:38,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-31 10:00:38,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-31 10:00:38,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2018-12-31 10:00:38,058 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 12 states. [2018-12-31 10:00:38,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:00:38,162 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-12-31 10:00:38,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-31 10:00:38,162 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2018-12-31 10:00:38,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:00:38,164 INFO L225 Difference]: With dead ends: 27 [2018-12-31 10:00:38,164 INFO L226 Difference]: Without dead ends: 23 [2018-12-31 10:00:38,165 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2018-12-31 10:00:38,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-31 10:00:38,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-12-31 10:00:38,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-31 10:00:38,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-12-31 10:00:38,170 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2018-12-31 10:00:38,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:00:38,171 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-12-31 10:00:38,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-31 10:00:38,171 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-12-31 10:00:38,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-31 10:00:38,173 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:00:38,173 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:00:38,173 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:00:38,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:00:38,174 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2018-12-31 10:00:38,174 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:00:38,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:00:38,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:00:38,175 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:00:38,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:00:38,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:00:38,593 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 10:00:38,593 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:00:38,594 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 10:00:38,604 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 10:00:38,626 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 10:00:38,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:00:38,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:00:38,698 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 10:00:38,718 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:00:38,719 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-12-31 10:00:38,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-31 10:00:38,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-31 10:00:38,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2018-12-31 10:00:38,720 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 14 states. [2018-12-31 10:00:38,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:00:38,848 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2018-12-31 10:00:38,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-31 10:00:38,849 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2018-12-31 10:00:38,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:00:38,851 INFO L225 Difference]: With dead ends: 30 [2018-12-31 10:00:38,851 INFO L226 Difference]: Without dead ends: 26 [2018-12-31 10:00:38,852 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2018-12-31 10:00:38,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-12-31 10:00:38,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-12-31 10:00:38,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-31 10:00:38,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-12-31 10:00:38,857 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2018-12-31 10:00:38,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:00:38,858 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-12-31 10:00:38,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-31 10:00:38,858 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-12-31 10:00:38,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-12-31 10:00:38,860 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:00:38,860 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:00:38,860 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:00:38,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:00:38,860 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2018-12-31 10:00:38,861 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:00:38,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:00:38,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:00:38,862 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:00:38,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:00:38,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:00:39,192 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-31 10:00:39,192 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:00:39,192 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:00:39,211 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 10:00:39,336 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-12-31 10:00:39,336 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:00:39,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:00:39,392 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-31 10:00:39,412 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:00:39,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-12-31 10:00:39,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-31 10:00:39,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-31 10:00:39,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2018-12-31 10:00:39,415 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 16 states. [2018-12-31 10:00:39,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:00:39,593 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-12-31 10:00:39,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-31 10:00:39,594 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2018-12-31 10:00:39,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:00:39,595 INFO L225 Difference]: With dead ends: 33 [2018-12-31 10:00:39,595 INFO L226 Difference]: Without dead ends: 29 [2018-12-31 10:00:39,596 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2018-12-31 10:00:39,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-12-31 10:00:39,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-12-31 10:00:39,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-31 10:00:39,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-12-31 10:00:39,603 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2018-12-31 10:00:39,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:00:39,604 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-12-31 10:00:39,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-31 10:00:39,604 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-12-31 10:00:39,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-31 10:00:39,605 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:00:39,605 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:00:39,606 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:00:39,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:00:39,606 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2018-12-31 10:00:39,606 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:00:39,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:00:39,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:00:39,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:00:39,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:00:39,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:00:40,239 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-12-31 10:00:40,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:00:40,240 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:00:40,251 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 10:00:40,282 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-12-31 10:00:40,282 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:00:40,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:00:40,332 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-12-31 10:00:40,353 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:00:40,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-12-31 10:00:40,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-31 10:00:40,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-31 10:00:40,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2018-12-31 10:00:40,355 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 18 states. [2018-12-31 10:00:40,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:00:40,842 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2018-12-31 10:00:40,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-31 10:00:40,843 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2018-12-31 10:00:40,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:00:40,845 INFO L225 Difference]: With dead ends: 36 [2018-12-31 10:00:40,846 INFO L226 Difference]: Without dead ends: 32 [2018-12-31 10:00:40,847 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2018-12-31 10:00:40,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-31 10:00:40,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-12-31 10:00:40,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-31 10:00:40,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2018-12-31 10:00:40,852 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2018-12-31 10:00:40,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:00:40,853 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2018-12-31 10:00:40,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-31 10:00:40,853 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2018-12-31 10:00:40,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-12-31 10:00:40,855 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:00:40,855 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:00:40,855 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:00:40,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:00:40,856 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2018-12-31 10:00:40,856 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:00:40,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:00:40,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:00:40,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:00:40,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:00:40,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:00:41,369 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-12-31 10:00:41,370 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:00:41,370 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:00:41,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:00:41,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:00:41,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:00:41,475 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-12-31 10:00:41,495 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:00:41,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-12-31 10:00:41,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-12-31 10:00:41,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-31 10:00:41,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2018-12-31 10:00:41,498 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 20 states. [2018-12-31 10:00:41,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:00:41,678 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2018-12-31 10:00:41,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-31 10:00:41,679 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 51 [2018-12-31 10:00:41,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:00:41,681 INFO L225 Difference]: With dead ends: 39 [2018-12-31 10:00:41,681 INFO L226 Difference]: Without dead ends: 35 [2018-12-31 10:00:41,682 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2018-12-31 10:00:41,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-12-31 10:00:41,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-12-31 10:00:41,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-12-31 10:00:41,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-12-31 10:00:41,688 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2018-12-31 10:00:41,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:00:41,688 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-12-31 10:00:41,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-12-31 10:00:41,688 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-12-31 10:00:41,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-31 10:00:41,690 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:00:41,690 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:00:41,690 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:00:41,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:00:41,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2018-12-31 10:00:41,691 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:00:41,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:00:41,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:00:41,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:00:41,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:00:41,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:00:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-12-31 10:00:42,202 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:00:42,203 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:00:42,213 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 10:00:42,234 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 10:00:42,234 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:00:42,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:00:42,374 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-12-31 10:00:42,394 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:00:42,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-12-31 10:00:42,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-31 10:00:42,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-31 10:00:42,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2018-12-31 10:00:42,396 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 22 states. [2018-12-31 10:00:42,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:00:42,669 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2018-12-31 10:00:42,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-31 10:00:42,670 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 57 [2018-12-31 10:00:42,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:00:42,672 INFO L225 Difference]: With dead ends: 42 [2018-12-31 10:00:42,672 INFO L226 Difference]: Without dead ends: 38 [2018-12-31 10:00:42,673 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2018-12-31 10:00:42,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-31 10:00:42,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-12-31 10:00:42,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-12-31 10:00:42,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-12-31 10:00:42,680 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2018-12-31 10:00:42,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:00:42,680 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-12-31 10:00:42,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-31 10:00:42,680 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-12-31 10:00:42,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-12-31 10:00:42,683 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:00:42,683 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:00:42,684 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:00:42,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:00:42,684 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2018-12-31 10:00:42,684 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:00:42,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:00:42,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:00:42,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:00:42,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:00:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:00:43,310 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-12-31 10:00:43,311 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:00:43,311 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:00:43,321 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 10:00:43,462 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-12-31 10:00:43,462 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:00:43,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:00:43,612 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-12-31 10:00:43,633 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:00:43,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-12-31 10:00:43,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-31 10:00:43,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-31 10:00:43,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2018-12-31 10:00:43,635 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 24 states. [2018-12-31 10:00:43,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:00:43,882 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-12-31 10:00:43,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-12-31 10:00:43,883 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 63 [2018-12-31 10:00:43,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:00:43,886 INFO L225 Difference]: With dead ends: 45 [2018-12-31 10:00:43,886 INFO L226 Difference]: Without dead ends: 41 [2018-12-31 10:00:43,887 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2018-12-31 10:00:43,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-12-31 10:00:43,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-12-31 10:00:43,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-12-31 10:00:43,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-12-31 10:00:43,893 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2018-12-31 10:00:43,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:00:43,893 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-12-31 10:00:43,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-31 10:00:43,894 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-12-31 10:00:43,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-12-31 10:00:43,895 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:00:43,895 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:00:43,895 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:00:43,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:00:43,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2018-12-31 10:00:43,895 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:00:43,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:00:43,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:00:43,896 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:00:43,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:00:43,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-31 10:00:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-31 10:00:43,999 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-31 10:00:44,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.12 10:00:44 BoogieIcfgContainer [2018-12-31 10:00:44,036 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-31 10:00:44,036 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-31 10:00:44,036 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-31 10:00:44,036 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-31 10:00:44,037 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 10:00:35" (3/4) ... [2018-12-31 10:00:44,039 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-31 10:00:44,106 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-12-31 10:00:44,106 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-31 10:00:44,107 INFO L168 Benchmark]: Toolchain (without parser) took 9715.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 180.9 MB). Free memory was 948.7 MB in the beginning and 844.2 MB in the end (delta: 104.5 MB). Peak memory consumption was 285.3 MB. Max. memory is 11.5 GB. [2018-12-31 10:00:44,108 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 10:00:44,108 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.01 ms. Allocated memory is still 1.0 GB. Free memory was 948.7 MB in the beginning and 937.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-31 10:00:44,109 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.53 ms. Allocated memory is still 1.0 GB. Free memory is still 937.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 10:00:44,109 INFO L168 Benchmark]: Boogie Preprocessor took 18.09 ms. Allocated memory is still 1.0 GB. Free memory is still 937.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 10:00:44,110 INFO L168 Benchmark]: RCFGBuilder took 319.72 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 107.0 MB). Free memory was 937.9 MB in the beginning and 1.1 GB in the end (delta: -153.6 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. [2018-12-31 10:00:44,110 INFO L168 Benchmark]: TraceAbstraction took 8990.61 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 73.9 MB). Free memory was 1.1 GB in the beginning and 844.2 MB in the end (delta: 247.3 MB). Peak memory consumption was 321.2 MB. Max. memory is 11.5 GB. [2018-12-31 10:00:44,111 INFO L168 Benchmark]: Witness Printer took 69.93 ms. Allocated memory is still 1.2 GB. Free memory is still 844.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 10:00:44,114 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 277.01 ms. Allocated memory is still 1.0 GB. Free memory was 948.7 MB in the beginning and 937.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 34.53 ms. Allocated memory is still 1.0 GB. Free memory is still 937.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.09 ms. Allocated memory is still 1.0 GB. Free memory is still 937.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 319.72 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 107.0 MB). Free memory was 937.9 MB in the beginning and 1.1 GB in the end (delta: -153.6 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 8990.61 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 73.9 MB). Free memory was 1.1 GB in the beginning and 844.2 MB in the end (delta: 247.3 MB). Peak memory consumption was 321.2 MB. Max. memory is 11.5 GB. * Witness Printer took 69.93 ms. Allocated memory is still 1.2 GB. Free memory is still 844.2 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] unsigned int input = __VERIFIER_nondet_uint(); [L11] CALL, EXPR id(input) VAL [\old(x)=10] [L5] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L6] CALL, EXPR id(x-1) VAL [\old(x)=9] [L5] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L6] CALL, EXPR id(x-1) VAL [\old(x)=8] [L5] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L6] CALL, EXPR id(x-1) VAL [\old(x)=7] [L5] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L6] CALL, EXPR id(x-1) VAL [\old(x)=6] [L5] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L6] CALL, EXPR id(x-1) 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; [L6] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] unsigned int result = id(input); [L12] COND TRUE result == 10 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. UNSAFE Result, 8.9s OverallTime, 11 OverallIterations, 11 TraceHistogramMax, 1.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 203 SDtfs, 3 SDslu, 2348 SDs, 0 SdLazy, 1233 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 482 GetRequests, 344 SyntacticMatches, 9 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=10, 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, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 5.5s InterpolantComputationTime, 780 NumberOfCodeBlocks, 780 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 692 ConstructedInterpolants, 0 QuantifiedInterpolants, 122872 SizeOfPredicates, 9 NumberOfNonLiveVariables, 738 ConjunctsInSsa, 252 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 900/1800 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...