./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/loops/n.c11_true-unreach-call_false-termination.i --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/loops/n.c11_true-unreach-call_false-termination.i -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 24b22c477e8a47eac290a2fc1c5b1e1aaa3a4fa4 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-2e94e6a [2018-12-31 05:41:27,965 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-31 05:41:27,967 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-31 05:41:27,979 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-31 05:41:27,980 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-31 05:41:27,981 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-31 05:41:27,982 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-31 05:41:27,992 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-31 05:41:27,994 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-31 05:41:27,994 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-31 05:41:27,998 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-31 05:41:27,998 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-31 05:41:27,999 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-31 05:41:28,000 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-31 05:41:28,003 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-31 05:41:28,004 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-31 05:41:28,005 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-31 05:41:28,006 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-31 05:41:28,008 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-31 05:41:28,010 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-31 05:41:28,011 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-31 05:41:28,012 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-31 05:41:28,015 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-31 05:41:28,015 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-31 05:41:28,015 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-31 05:41:28,016 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-31 05:41:28,019 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-31 05:41:28,020 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-31 05:41:28,021 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-31 05:41:28,023 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-31 05:41:28,023 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-31 05:41:28,024 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-31 05:41:28,024 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-31 05:41:28,024 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-31 05:41:28,026 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-31 05:41:28,027 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-31 05:41:28,028 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-31 05:41:28,048 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-31 05:41:28,049 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-31 05:41:28,050 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-31 05:41:28,050 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-31 05:41:28,050 INFO L133 SettingsManager]: * Use SBE=true [2018-12-31 05:41:28,051 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-31 05:41:28,051 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-31 05:41:28,051 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-31 05:41:28,051 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-31 05:41:28,051 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-31 05:41:28,051 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-31 05:41:28,052 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-31 05:41:28,052 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-31 05:41:28,052 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-31 05:41:28,052 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-31 05:41:28,052 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-31 05:41:28,052 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-31 05:41:28,053 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-31 05:41:28,053 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-31 05:41:28,053 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-31 05:41:28,053 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-31 05:41:28,053 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-31 05:41:28,054 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-31 05:41:28,054 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-31 05:41:28,054 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-31 05:41:28,054 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-31 05:41:28,054 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-31 05:41:28,054 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-31 05:41:28,055 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 -> 24b22c477e8a47eac290a2fc1c5b1e1aaa3a4fa4 [2018-12-31 05:41:28,100 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-31 05:41:28,117 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-31 05:41:28,123 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-31 05:41:28,125 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-31 05:41:28,125 INFO L276 PluginConnector]: CDTParser initialized [2018-12-31 05:41:28,126 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/loops/n.c11_true-unreach-call_false-termination.i [2018-12-31 05:41:28,193 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ef831285/5ab20aa11e334c4ca1162fcd194b0ca3/FLAGd7c5dd029 [2018-12-31 05:41:28,642 INFO L307 CDTParser]: Found 1 translation units. [2018-12-31 05:41:28,643 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/loops/n.c11_true-unreach-call_false-termination.i [2018-12-31 05:41:28,649 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ef831285/5ab20aa11e334c4ca1162fcd194b0ca3/FLAGd7c5dd029 [2018-12-31 05:41:29,002 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ef831285/5ab20aa11e334c4ca1162fcd194b0ca3 [2018-12-31 05:41:29,006 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-31 05:41:29,007 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-31 05:41:29,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-31 05:41:29,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-31 05:41:29,012 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-31 05:41:29,013 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 05:41:29" (1/1) ... [2018-12-31 05:41:29,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fbddce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:41:29, skipping insertion in model container [2018-12-31 05:41:29,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 05:41:29" (1/1) ... [2018-12-31 05:41:29,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-31 05:41:29,042 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-31 05:41:29,249 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 05:41:29,255 INFO L191 MainTranslator]: Completed pre-run [2018-12-31 05:41:29,277 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 05:41:29,292 INFO L195 MainTranslator]: Completed translation [2018-12-31 05:41:29,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:41:29 WrapperNode [2018-12-31 05:41:29,293 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-31 05:41:29,294 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-31 05:41:29,294 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-31 05:41:29,294 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-31 05:41:29,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:41:29" (1/1) ... [2018-12-31 05:41:29,308 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:41:29" (1/1) ... [2018-12-31 05:41:29,330 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-31 05:41:29,330 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-31 05:41:29,330 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-31 05:41:29,331 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-31 05:41:29,340 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:41:29" (1/1) ... [2018-12-31 05:41:29,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:41:29" (1/1) ... [2018-12-31 05:41:29,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:41:29" (1/1) ... [2018-12-31 05:41:29,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:41:29" (1/1) ... [2018-12-31 05:41:29,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:41:29" (1/1) ... [2018-12-31 05:41:29,350 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:41:29" (1/1) ... [2018-12-31 05:41:29,351 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:41:29" (1/1) ... [2018-12-31 05:41:29,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-31 05:41:29,352 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-31 05:41:29,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-31 05:41:29,353 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-31 05:41:29,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:41:29" (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 05:41:29,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-31 05:41:29,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-31 05:41:29,642 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-31 05:41:29,643 INFO L280 CfgBuilder]: Removed 7 assue(true) statements. [2018-12-31 05:41:29,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 05:41:29 BoogieIcfgContainer [2018-12-31 05:41:29,643 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-31 05:41:29,644 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-31 05:41:29,644 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-31 05:41:29,647 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-31 05:41:29,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.12 05:41:29" (1/3) ... [2018-12-31 05:41:29,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@365a736f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 05:41:29, skipping insertion in model container [2018-12-31 05:41:29,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:41:29" (2/3) ... [2018-12-31 05:41:29,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@365a736f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 05:41:29, skipping insertion in model container [2018-12-31 05:41:29,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 05:41:29" (3/3) ... [2018-12-31 05:41:29,650 INFO L112 eAbstractionObserver]: Analyzing ICFG n.c11_true-unreach-call_false-termination.i [2018-12-31 05:41:29,658 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-31 05:41:29,665 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-31 05:41:29,682 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-31 05:41:29,713 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-31 05:41:29,714 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-31 05:41:29,714 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-31 05:41:29,714 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-31 05:41:29,714 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-31 05:41:29,715 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-31 05:41:29,715 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-31 05:41:29,715 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-31 05:41:29,715 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-31 05:41:29,728 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2018-12-31 05:41:29,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-31 05:41:29,735 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:41:29,736 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-31 05:41:29,739 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:41:29,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:41:29,745 INFO L82 PathProgramCache]: Analyzing trace with hash 30139652, now seen corresponding path program 1 times [2018-12-31 05:41:29,747 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:41:29,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:41:29,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:41:29,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 05:41:29,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:41:29,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:41:29,861 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 05:41:29,863 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 05:41:29,864 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-31 05:41:29,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-31 05:41:29,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-31 05:41:29,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-31 05:41:29,884 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2018-12-31 05:41:29,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:41:29,899 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2018-12-31 05:41:29,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-31 05:41:29,900 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2018-12-31 05:41:29,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:41:29,911 INFO L225 Difference]: With dead ends: 20 [2018-12-31 05:41:29,911 INFO L226 Difference]: Without dead ends: 8 [2018-12-31 05:41:29,915 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-31 05:41:29,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-12-31 05:41:29,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-12-31 05:41:29,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-12-31 05:41:29,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2018-12-31 05:41:29,945 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2018-12-31 05:41:29,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:41:29,946 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-12-31 05:41:29,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-31 05:41:29,946 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2018-12-31 05:41:29,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-31 05:41:29,946 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:41:29,947 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-31 05:41:29,947 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:41:29,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:41:29,947 INFO L82 PathProgramCache]: Analyzing trace with hash 29811951, now seen corresponding path program 1 times [2018-12-31 05:41:29,948 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:41:29,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:41:29,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:41:29,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 05:41:29,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:41:29,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:41:30,303 WARN L181 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 5 [2018-12-31 05:41:30,383 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 05:41:30,384 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 05:41:30,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-31 05:41:30,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-31 05:41:30,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-31 05:41:30,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-31 05:41:30,386 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2018-12-31 05:41:30,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:41:30,537 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2018-12-31 05:41:30,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-31 05:41:30,538 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-12-31 05:41:30,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:41:30,539 INFO L225 Difference]: With dead ends: 20 [2018-12-31 05:41:30,539 INFO L226 Difference]: Without dead ends: 11 [2018-12-31 05:41:30,540 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-31 05:41:30,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-12-31 05:41:30,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2018-12-31 05:41:30,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-12-31 05:41:30,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2018-12-31 05:41:30,544 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 5 [2018-12-31 05:41:30,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:41:30,544 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2018-12-31 05:41:30,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-31 05:41:30,544 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2018-12-31 05:41:30,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-31 05:41:30,547 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:41:30,547 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 05:41:30,549 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:41:30,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:41:30,550 INFO L82 PathProgramCache]: Analyzing trace with hash 665854491, now seen corresponding path program 1 times [2018-12-31 05:41:30,550 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:41:30,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:41:30,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:41:30,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 05:41:30,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:41:30,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:41:30,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 05:41:30,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 05:41:30,753 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 05:41:30,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 05:41:30,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:41:30,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 05:41:30,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 05:41:30,994 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 05:41:30,994 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-12-31 05:41:30,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-31 05:41:30,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-31 05:41:30,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-31 05:41:30,996 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 6 states. [2018-12-31 05:41:31,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:41:31,277 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2018-12-31 05:41:31,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-31 05:41:31,279 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2018-12-31 05:41:31,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:41:31,280 INFO L225 Difference]: With dead ends: 23 [2018-12-31 05:41:31,280 INFO L226 Difference]: Without dead ends: 14 [2018-12-31 05:41:31,282 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-12-31 05:41:31,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-12-31 05:41:31,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2018-12-31 05:41:31,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-12-31 05:41:31,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-12-31 05:41:31,285 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2018-12-31 05:41:31,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:41:31,286 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-12-31 05:41:31,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-31 05:41:31,286 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-12-31 05:41:31,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-12-31 05:41:31,287 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:41:31,287 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2018-12-31 05:41:31,287 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:41:31,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:41:31,288 INFO L82 PathProgramCache]: Analyzing trace with hash -386546321, now seen corresponding path program 2 times [2018-12-31 05:41:31,288 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:41:31,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:41:31,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:41:31,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 05:41:31,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:41:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:41:31,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 05:41:31,491 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 05:41:31,491 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 05:41:31,504 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 05:41:31,528 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 05:41:31,528 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 05:41:31,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 05:41:31,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 05:41:31,593 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 05:41:31,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-12-31 05:41:31,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-31 05:41:31,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-31 05:41:31,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-12-31 05:41:31,595 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2018-12-31 05:41:31,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:41:31,828 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2018-12-31 05:41:31,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-31 05:41:31,829 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-12-31 05:41:31,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:41:31,830 INFO L225 Difference]: With dead ends: 29 [2018-12-31 05:41:31,831 INFO L226 Difference]: Without dead ends: 17 [2018-12-31 05:41:31,831 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-12-31 05:41:31,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-12-31 05:41:31,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2018-12-31 05:41:31,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-12-31 05:41:31,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-12-31 05:41:31,836 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2018-12-31 05:41:31,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:41:31,836 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-12-31 05:41:31,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-31 05:41:31,837 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-12-31 05:41:31,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-31 05:41:31,837 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:41:31,837 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1] [2018-12-31 05:41:31,838 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:41:31,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:41:31,838 INFO L82 PathProgramCache]: Analyzing trace with hash 802124187, now seen corresponding path program 3 times [2018-12-31 05:41:31,838 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:41:31,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:41:31,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:41:31,840 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 05:41:31,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:41:31,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:41:32,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 05:41:32,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 05:41:32,032 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 05:41:32,041 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 05:41:32,059 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-31 05:41:32,059 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 05:41:32,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 05:41:32,148 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 05:41:32,179 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 05:41:32,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-12-31 05:41:32,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-31 05:41:32,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-31 05:41:32,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-12-31 05:41:32,181 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 8 states. [2018-12-31 05:41:32,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:41:32,580 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2018-12-31 05:41:32,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-31 05:41:32,585 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-12-31 05:41:32,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:41:32,586 INFO L225 Difference]: With dead ends: 35 [2018-12-31 05:41:32,586 INFO L226 Difference]: Without dead ends: 20 [2018-12-31 05:41:32,587 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-12-31 05:41:32,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-12-31 05:41:32,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2018-12-31 05:41:32,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-12-31 05:41:32,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-12-31 05:41:32,594 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2018-12-31 05:41:32,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:41:32,594 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-12-31 05:41:32,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-31 05:41:32,595 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-12-31 05:41:32,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-31 05:41:32,595 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:41:32,596 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1] [2018-12-31 05:41:32,596 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:41:32,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:41:32,596 INFO L82 PathProgramCache]: Analyzing trace with hash 479872495, now seen corresponding path program 4 times [2018-12-31 05:41:32,596 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:41:32,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:41:32,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:41:32,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 05:41:32,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:41:32,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:41:32,771 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 05:41:32,771 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 05:41:32,771 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 05:41:32,789 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 05:41:32,803 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 05:41:32,803 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 05:41:32,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 05:41:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 05:41:32,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 05:41:32,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-12-31 05:41:32,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-31 05:41:32,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-31 05:41:32,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-12-31 05:41:32,881 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 9 states. [2018-12-31 05:41:33,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:41:33,008 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2018-12-31 05:41:33,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-31 05:41:33,012 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2018-12-31 05:41:33,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:41:33,013 INFO L225 Difference]: With dead ends: 33 [2018-12-31 05:41:33,013 INFO L226 Difference]: Without dead ends: 0 [2018-12-31 05:41:33,014 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-12-31 05:41:33,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-31 05:41:33,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-31 05:41:33,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-31 05:41:33,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-31 05:41:33,015 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2018-12-31 05:41:33,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:41:33,015 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-31 05:41:33,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-31 05:41:33,015 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-31 05:41:33,015 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-31 05:41:33,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-31 05:41:33,089 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-31 05:41:33,089 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2018-12-31 05:41:33,089 INFO L444 ceAbstractionStarter]: At program point L13-2(lines 13 18) the Hoare annotation is: (or (and (<= ULTIMATE.start_main_~len~0 4) (<= 4 ULTIMATE.start_main_~len~0)) (and (<= 1 ULTIMATE.start_main_~len~0) (<= ULTIMATE.start_main_~len~0 1)) (and (<= 3 ULTIMATE.start_main_~len~0) (<= ULTIMATE.start_main_~len~0 3)) (and (<= 2 ULTIMATE.start_main_~len~0) (<= ULTIMATE.start_main_~len~0 2)) (and (<= 0 ULTIMATE.start_main_~len~0) (<= ULTIMATE.start_main_~len~0 0))) [2018-12-31 05:41:33,090 INFO L448 ceAbstractionStarter]: For program point L13-3(lines 13 18) no Hoare annotation was computed. [2018-12-31 05:41:33,090 INFO L448 ceAbstractionStarter]: For program point L3(lines 3 5) no Hoare annotation was computed. [2018-12-31 05:41:33,090 INFO L451 ceAbstractionStarter]: At program point L3-2(lines 2 7) the Hoare annotation is: true [2018-12-31 05:41:33,090 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2018-12-31 05:41:33,090 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-31 05:41:33,090 INFO L451 ceAbstractionStarter]: At program point L20(lines 9 21) the Hoare annotation is: true [2018-12-31 05:41:33,091 INFO L448 ceAbstractionStarter]: For program point L14(lines 14 15) no Hoare annotation was computed. [2018-12-31 05:41:33,091 INFO L448 ceAbstractionStarter]: For program point L14-2(lines 14 15) no Hoare annotation was computed. [2018-12-31 05:41:33,091 INFO L448 ceAbstractionStarter]: For program point L4(line 4) no Hoare annotation was computed. [2018-12-31 05:41:33,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.12 05:41:33 BoogieIcfgContainer [2018-12-31 05:41:33,105 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-31 05:41:33,106 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-31 05:41:33,106 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-31 05:41:33,106 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-31 05:41:33,107 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 05:41:29" (3/4) ... [2018-12-31 05:41:33,110 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-31 05:41:33,120 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2018-12-31 05:41:33,121 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-31 05:41:33,168 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-12-31 05:41:33,168 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-31 05:41:33,169 INFO L168 Benchmark]: Toolchain (without parser) took 4163.09 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 118.0 MB). Free memory was 951.4 MB in the beginning and 941.3 MB in the end (delta: 10.1 MB). Peak memory consumption was 128.0 MB. Max. memory is 11.5 GB. [2018-12-31 05:41:33,171 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 05:41:33,171 INFO L168 Benchmark]: CACSL2BoogieTranslator took 285.10 ms. Allocated memory is still 1.0 GB. Free memory was 951.4 MB in the beginning and 940.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-31 05:41:33,172 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.39 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 05:41:33,172 INFO L168 Benchmark]: Boogie Preprocessor took 21.80 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 05:41:33,173 INFO L168 Benchmark]: RCFGBuilder took 290.88 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 118.0 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -152.0 MB). Peak memory consumption was 18.6 MB. Max. memory is 11.5 GB. [2018-12-31 05:41:33,174 INFO L168 Benchmark]: TraceAbstraction took 3461.51 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 948.0 MB in the end (delta: 144.6 MB). Peak memory consumption was 144.6 MB. Max. memory is 11.5 GB. [2018-12-31 05:41:33,175 INFO L168 Benchmark]: Witness Printer took 62.63 ms. Allocated memory is still 1.1 GB. Free memory was 948.0 MB in the beginning and 941.3 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2018-12-31 05:41:33,180 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 285.10 ms. Allocated memory is still 1.0 GB. Free memory was 951.4 MB in the beginning and 940.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 36.39 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.80 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 290.88 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 118.0 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -152.0 MB). Peak memory consumption was 18.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3461.51 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 948.0 MB in the end (delta: 144.6 MB). Peak memory consumption was 144.6 MB. Max. memory is 11.5 GB. * Witness Printer took 62.63 ms. Allocated memory is still 1.1 GB. Free memory was 948.0 MB in the beginning and 941.3 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: ((((len <= 4 && 4 <= len) || (1 <= len && len <= 1)) || (3 <= len && len <= 3)) || (2 <= len && len <= 2)) || (0 <= len && len <= 0) - InvariantResult [Line: 2]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 9]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. SAFE Result, 3.3s OverallTime, 6 OverallIterations, 4 TraceHistogramMax, 1.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 50 SDtfs, 40 SDslu, 114 SDs, 0 SdLazy, 187 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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, 6 MinimizatonAttempts, 4 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 10 NumberOfFragments, 38 HoareAnnotationTreeSize, 3 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 110 NumberOfCodeBlocks, 110 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 100 ConstructedInterpolants, 0 QuantifiedInterpolants, 7572 SizeOfPredicates, 12 NumberOfNonLiveVariables, 102 ConjunctsInSsa, 53 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 0/80 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...