./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/recursive-simple/fibo_10_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2e94e6aa Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/svcomp/c/recursive-simple/fibo_10_true-unreach-call_true-termination.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dd317ac0ecdb37853dacea373914a521115465e0 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 10:05:27,424 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-31 10:05:27,426 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-31 10:05:27,437 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-31 10:05:27,437 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-31 10:05:27,438 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-31 10:05:27,440 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-31 10:05:27,442 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-31 10:05:27,443 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-31 10:05:27,444 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-31 10:05:27,445 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-31 10:05:27,445 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-31 10:05:27,446 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-31 10:05:27,447 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-31 10:05:27,449 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-31 10:05:27,451 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-31 10:05:27,452 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-31 10:05:27,457 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-31 10:05:27,460 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-31 10:05:27,463 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-31 10:05:27,465 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-31 10:05:27,468 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-31 10:05:27,470 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-31 10:05:27,471 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-31 10:05:27,471 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-31 10:05:27,472 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-31 10:05:27,473 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-31 10:05:27,473 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-31 10:05:27,474 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-31 10:05:27,475 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-31 10:05:27,475 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-31 10:05:27,476 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-31 10:05:27,476 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-31 10:05:27,477 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-31 10:05:27,478 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-31 10:05:27,478 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-31 10:05:27,479 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-31 10:05:27,493 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-31 10:05:27,494 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-31 10:05:27,495 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-31 10:05:27,495 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-31 10:05:27,495 INFO L133 SettingsManager]: * Use SBE=true [2018-12-31 10:05:27,495 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-31 10:05:27,496 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-31 10:05:27,496 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-31 10:05:27,496 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-31 10:05:27,496 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-31 10:05:27,496 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-31 10:05:27,496 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-31 10:05:27,497 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-31 10:05:27,497 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-31 10:05:27,497 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-31 10:05:27,497 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-31 10:05:27,497 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-31 10:05:27,497 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-31 10:05:27,498 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-31 10:05:27,498 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-31 10:05:27,498 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-31 10:05:27,498 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-31 10:05:27,498 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-31 10:05:27,499 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-31 10:05:27,499 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-31 10:05:27,499 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-31 10:05:27,499 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-31 10:05:27,499 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-31 10:05:27,499 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 -> dd317ac0ecdb37853dacea373914a521115465e0 [2018-12-31 10:05:27,551 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-31 10:05:27,564 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-31 10:05:27,568 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-31 10:05:27,570 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-31 10:05:27,571 INFO L276 PluginConnector]: CDTParser initialized [2018-12-31 10:05:27,571 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/recursive-simple/fibo_10_true-unreach-call_true-termination.c [2018-12-31 10:05:27,647 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f5a72750/79093254aebe4f0880aea292543d0c90/FLAG302e88134 [2018-12-31 10:05:28,080 INFO L307 CDTParser]: Found 1 translation units. [2018-12-31 10:05:28,081 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/recursive-simple/fibo_10_true-unreach-call_true-termination.c [2018-12-31 10:05:28,087 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f5a72750/79093254aebe4f0880aea292543d0c90/FLAG302e88134 [2018-12-31 10:05:28,476 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f5a72750/79093254aebe4f0880aea292543d0c90 [2018-12-31 10:05:28,481 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-31 10:05:28,483 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-31 10:05:28,488 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-31 10:05:28,488 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-31 10:05:28,492 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-31 10:05:28,494 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 10:05:28" (1/1) ... [2018-12-31 10:05:28,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d2d9836 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:05:28, skipping insertion in model container [2018-12-31 10:05:28,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 10:05:28" (1/1) ... [2018-12-31 10:05:28,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-31 10:05:28,530 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-31 10:05:28,755 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 10:05:28,761 INFO L191 MainTranslator]: Completed pre-run [2018-12-31 10:05:28,782 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 10:05:28,800 INFO L195 MainTranslator]: Completed translation [2018-12-31 10:05:28,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:05:28 WrapperNode [2018-12-31 10:05:28,802 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-31 10:05:28,803 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-31 10:05:28,803 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-31 10:05:28,803 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-31 10:05:28,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:05:28" (1/1) ... [2018-12-31 10:05:28,819 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:05:28" (1/1) ... [2018-12-31 10:05:28,843 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-31 10:05:28,844 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-31 10:05:28,844 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-31 10:05:28,844 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-31 10:05:28,854 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:05:28" (1/1) ... [2018-12-31 10:05:28,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:05:28" (1/1) ... [2018-12-31 10:05:28,855 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:05:28" (1/1) ... [2018-12-31 10:05:28,855 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:05:28" (1/1) ... [2018-12-31 10:05:28,858 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:05:28" (1/1) ... [2018-12-31 10:05:28,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:05:28" (1/1) ... [2018-12-31 10:05:28,861 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:05:28" (1/1) ... [2018-12-31 10:05:28,862 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-31 10:05:28,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-31 10:05:28,863 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-31 10:05:28,863 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-31 10:05:28,864 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:05:28" (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 10:05:28,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-31 10:05:28,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-31 10:05:28,986 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2018-12-31 10:05:28,986 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2018-12-31 10:05:29,213 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-31 10:05:29,213 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-12-31 10:05:29,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 10:05:29 BoogieIcfgContainer [2018-12-31 10:05:29,214 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-31 10:05:29,216 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-31 10:05:29,216 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-31 10:05:29,221 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-31 10:05:29,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.12 10:05:28" (1/3) ... [2018-12-31 10:05:29,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41327803 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 10:05:29, skipping insertion in model container [2018-12-31 10:05:29,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:05:28" (2/3) ... [2018-12-31 10:05:29,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41327803 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 10:05:29, skipping insertion in model container [2018-12-31 10:05:29,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 10:05:29" (3/3) ... [2018-12-31 10:05:29,231 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_10_true-unreach-call_true-termination.c [2018-12-31 10:05:29,251 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-31 10:05:29,263 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-31 10:05:29,289 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-31 10:05:29,327 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-31 10:05:29,328 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-31 10:05:29,328 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-31 10:05:29,328 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-31 10:05:29,328 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-31 10:05:29,329 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-31 10:05:29,329 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-31 10:05:29,329 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-31 10:05:29,330 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-31 10:05:29,350 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-12-31 10:05:29,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-31 10:05:29,357 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:05:29,358 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:05:29,361 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:05:29,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:05:29,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1007516703, now seen corresponding path program 1 times [2018-12-31 10:05:29,371 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:05:29,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:05:29,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:29,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:05:29,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:29,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:05:29,622 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 10:05:29,626 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 10:05:29,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-31 10:05:29,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-31 10:05:29,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-31 10:05:29,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-31 10:05:29,646 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2018-12-31 10:05:29,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:05:29,802 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2018-12-31 10:05:29,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-31 10:05:29,805 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-12-31 10:05:29,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:05:29,815 INFO L225 Difference]: With dead ends: 29 [2018-12-31 10:05:29,815 INFO L226 Difference]: Without dead ends: 17 [2018-12-31 10:05:29,818 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-31 10:05:29,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-12-31 10:05:29,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-12-31 10:05:29,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-31 10:05:29,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2018-12-31 10:05:29,862 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2018-12-31 10:05:29,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:05:29,863 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2018-12-31 10:05:29,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-31 10:05:29,863 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2018-12-31 10:05:29,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-31 10:05:29,865 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:05:29,865 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:05:29,865 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:05:29,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:05:29,866 INFO L82 PathProgramCache]: Analyzing trace with hash -453503986, now seen corresponding path program 1 times [2018-12-31 10:05:29,866 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:05:29,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:05:29,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:29,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:05:29,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:05:30,107 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 10:05:30,108 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 10:05:30,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-31 10:05:30,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-31 10:05:30,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-31 10:05:30,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-31 10:05:30,110 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 5 states. [2018-12-31 10:05:30,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:05:30,420 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2018-12-31 10:05:30,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-31 10:05:30,421 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-12-31 10:05:30,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:05:30,423 INFO L225 Difference]: With dead ends: 23 [2018-12-31 10:05:30,423 INFO L226 Difference]: Without dead ends: 19 [2018-12-31 10:05:30,424 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-31 10:05:30,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-12-31 10:05:30,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2018-12-31 10:05:30,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-31 10:05:30,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2018-12-31 10:05:30,431 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2018-12-31 10:05:30,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:05:30,432 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2018-12-31 10:05:30,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-31 10:05:30,433 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2018-12-31 10:05:30,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-31 10:05:30,435 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:05:30,435 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:05:30,435 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:05:30,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:05:30,436 INFO L82 PathProgramCache]: Analyzing trace with hash 511906889, now seen corresponding path program 1 times [2018-12-31 10:05:30,436 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:05:30,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:05:30,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:30,438 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:05:30,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:05:30,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-31 10:05:30,650 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:05:30,650 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 10:05:30,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:05:30,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:05:30,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:05:30,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-31 10:05:30,854 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:05:30,854 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-12-31 10:05:30,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-31 10:05:30,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-31 10:05:30,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-12-31 10:05:30,857 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 8 states. [2018-12-31 10:05:31,047 WARN L181 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 6 [2018-12-31 10:05:31,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:05:31,195 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2018-12-31 10:05:31,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-31 10:05:31,197 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2018-12-31 10:05:31,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:05:31,199 INFO L225 Difference]: With dead ends: 34 [2018-12-31 10:05:31,199 INFO L226 Difference]: Without dead ends: 19 [2018-12-31 10:05:31,203 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-12-31 10:05:31,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-12-31 10:05:31,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-12-31 10:05:31,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-12-31 10:05:31,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2018-12-31 10:05:31,214 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 22 [2018-12-31 10:05:31,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:05:31,215 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2018-12-31 10:05:31,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-31 10:05:31,216 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2018-12-31 10:05:31,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-31 10:05:31,218 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:05:31,218 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:05:31,218 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:05:31,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:05:31,219 INFO L82 PathProgramCache]: Analyzing trace with hash 178931364, now seen corresponding path program 1 times [2018-12-31 10:05:31,219 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:05:31,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:05:31,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:31,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:05:31,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:31,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:05:31,404 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-31 10:05:31,404 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:05:31,404 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 10:05:31,418 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:05:31,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:05:31,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:05:31,467 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-31 10:05:31,494 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:05:31,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-12-31 10:05:31,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-31 10:05:31,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-31 10:05:31,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-31 10:05:31,496 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 6 states. [2018-12-31 10:05:31,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:05:31,801 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2018-12-31 10:05:31,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-31 10:05:31,802 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2018-12-31 10:05:31,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:05:31,805 INFO L225 Difference]: With dead ends: 28 [2018-12-31 10:05:31,805 INFO L226 Difference]: Without dead ends: 24 [2018-12-31 10:05:31,809 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-12-31 10:05:31,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-31 10:05:31,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-12-31 10:05:31,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-31 10:05:31,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2018-12-31 10:05:31,823 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 23 [2018-12-31 10:05:31,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:05:31,824 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2018-12-31 10:05:31,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-31 10:05:31,824 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2018-12-31 10:05:31,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-12-31 10:05:31,828 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:05:31,828 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:05:31,829 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:05:31,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:05:31,830 INFO L82 PathProgramCache]: Analyzing trace with hash 645818342, now seen corresponding path program 2 times [2018-12-31 10:05:31,830 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:05:31,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:05:31,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:31,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:05:31,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:31,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:05:31,965 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-12-31 10:05:31,966 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:05:31,966 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 10:05:31,985 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 10:05:32,009 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 10:05:32,009 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:05:32,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:05:32,097 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-12-31 10:05:32,120 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:05:32,120 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2018-12-31 10:05:32,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-31 10:05:32,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-31 10:05:32,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-12-31 10:05:32,121 INFO L87 Difference]: Start difference. First operand 24 states and 33 transitions. Second operand 8 states. [2018-12-31 10:05:32,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:05:32,391 INFO L93 Difference]: Finished difference Result 36 states and 56 transitions. [2018-12-31 10:05:32,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-31 10:05:32,392 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2018-12-31 10:05:32,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:05:32,394 INFO L225 Difference]: With dead ends: 36 [2018-12-31 10:05:32,394 INFO L226 Difference]: Without dead ends: 32 [2018-12-31 10:05:32,395 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-12-31 10:05:32,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-31 10:05:32,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2018-12-31 10:05:32,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-31 10:05:32,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 45 transitions. [2018-12-31 10:05:32,406 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 45 transitions. Word has length 36 [2018-12-31 10:05:32,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:05:32,406 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 45 transitions. [2018-12-31 10:05:32,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-31 10:05:32,407 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 45 transitions. [2018-12-31 10:05:32,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-12-31 10:05:32,410 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:05:32,410 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 8, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1] [2018-12-31 10:05:32,411 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:05:32,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:05:32,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1193104726, now seen corresponding path program 3 times [2018-12-31 10:05:32,411 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:05:32,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:05:32,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:32,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:05:32,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:32,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:05:32,636 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 110 proven. 8 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2018-12-31 10:05:32,637 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:05:32,637 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 10:05:32,661 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 10:05:32,764 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-31 10:05:32,764 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:05:32,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:05:32,943 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 130 proven. 12 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2018-12-31 10:05:32,968 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:05:32,969 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2018-12-31 10:05:32,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-31 10:05:32,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-31 10:05:32,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-12-31 10:05:32,970 INFO L87 Difference]: Start difference. First operand 29 states and 45 transitions. Second operand 11 states. [2018-12-31 10:05:33,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:05:33,303 INFO L93 Difference]: Finished difference Result 61 states and 109 transitions. [2018-12-31 10:05:33,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-31 10:05:33,304 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 77 [2018-12-31 10:05:33,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:05:33,306 INFO L225 Difference]: With dead ends: 61 [2018-12-31 10:05:33,306 INFO L226 Difference]: Without dead ends: 34 [2018-12-31 10:05:33,308 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2018-12-31 10:05:33,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-12-31 10:05:33,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2018-12-31 10:05:33,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-12-31 10:05:33,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2018-12-31 10:05:33,317 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 77 [2018-12-31 10:05:33,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:05:33,318 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2018-12-31 10:05:33,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-31 10:05:33,318 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2018-12-31 10:05:33,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-12-31 10:05:33,320 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:05:33,320 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1] [2018-12-31 10:05:33,321 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:05:33,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:05:33,321 INFO L82 PathProgramCache]: Analyzing trace with hash -91709127, now seen corresponding path program 4 times [2018-12-31 10:05:33,321 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:05:33,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:05:33,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:33,322 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:05:33,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:33,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:05:33,449 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 41 proven. 82 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2018-12-31 10:05:33,450 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:05:33,450 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 10:05:33,460 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 10:05:33,496 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 10:05:33,496 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:05:33,501 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:05:33,562 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 127 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2018-12-31 10:05:33,582 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:05:33,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2018-12-31 10:05:33,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-31 10:05:33,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-31 10:05:33,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-12-31 10:05:33,584 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 8 states. [2018-12-31 10:05:33,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:05:33,795 INFO L93 Difference]: Finished difference Result 40 states and 62 transitions. [2018-12-31 10:05:33,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-31 10:05:33,796 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 78 [2018-12-31 10:05:33,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:05:33,798 INFO L225 Difference]: With dead ends: 40 [2018-12-31 10:05:33,798 INFO L226 Difference]: Without dead ends: 36 [2018-12-31 10:05:33,799 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-12-31 10:05:33,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-31 10:05:33,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-12-31 10:05:33,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-12-31 10:05:33,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2018-12-31 10:05:33,809 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 78 [2018-12-31 10:05:33,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:05:33,809 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2018-12-31 10:05:33,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-31 10:05:33,809 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2018-12-31 10:05:33,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-12-31 10:05:33,813 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:05:33,813 INFO L402 BasicCegarLoop]: trace histogram [21, 21, 18, 10, 10, 10, 10, 10, 10, 10, 8, 3, 1, 1, 1, 1, 1, 1] [2018-12-31 10:05:33,813 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:05:33,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:05:33,813 INFO L82 PathProgramCache]: Analyzing trace with hash -2138111439, now seen corresponding path program 5 times [2018-12-31 10:05:33,814 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:05:33,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:05:33,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:33,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:05:33,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:33,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:05:34,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 239 proven. 179 refuted. 0 times theorem prover too weak. 755 trivial. 0 not checked. [2018-12-31 10:05:34,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:05:34,079 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 10:05:34,111 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 10:05:34,235 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-12-31 10:05:34,235 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:05:34,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:05:34,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 710 proven. 17 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2018-12-31 10:05:34,532 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:05:34,533 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 12 [2018-12-31 10:05:34,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-31 10:05:34,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-31 10:05:34,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-12-31 10:05:34,534 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 12 states. [2018-12-31 10:05:35,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:05:35,285 INFO L93 Difference]: Finished difference Result 84 states and 173 transitions. [2018-12-31 10:05:35,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-31 10:05:35,287 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 147 [2018-12-31 10:05:35,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:05:35,290 INFO L225 Difference]: With dead ends: 84 [2018-12-31 10:05:35,290 INFO L226 Difference]: Without dead ends: 50 [2018-12-31 10:05:35,293 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2018-12-31 10:05:35,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-12-31 10:05:35,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2018-12-31 10:05:35,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-31 10:05:35,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 73 transitions. [2018-12-31 10:05:35,304 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 73 transitions. Word has length 147 [2018-12-31 10:05:35,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:05:35,304 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 73 transitions. [2018-12-31 10:05:35,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-31 10:05:35,305 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 73 transitions. [2018-12-31 10:05:35,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-12-31 10:05:35,307 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:05:35,307 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1] [2018-12-31 10:05:35,307 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:05:35,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:05:35,308 INFO L82 PathProgramCache]: Analyzing trace with hash -2413653, now seen corresponding path program 6 times [2018-12-31 10:05:35,308 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:05:35,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:05:35,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:35,309 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:05:35,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:35,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:05:35,553 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 76 proven. 241 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2018-12-31 10:05:35,554 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:05:35,554 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 10:05:35,564 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 10:05:35,653 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-12-31 10:05:35,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:05:35,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:05:35,731 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 52 proven. 326 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2018-12-31 10:05:35,749 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:05:35,750 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2018-12-31 10:05:35,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-31 10:05:35,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-31 10:05:35,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-12-31 10:05:35,751 INFO L87 Difference]: Start difference. First operand 44 states and 73 transitions. Second operand 9 states. [2018-12-31 10:05:36,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:05:36,100 INFO L93 Difference]: Finished difference Result 53 states and 93 transitions. [2018-12-31 10:05:36,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-31 10:05:36,101 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 132 [2018-12-31 10:05:36,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:05:36,104 INFO L225 Difference]: With dead ends: 53 [2018-12-31 10:05:36,105 INFO L226 Difference]: Without dead ends: 49 [2018-12-31 10:05:36,105 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-12-31 10:05:36,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-12-31 10:05:36,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-12-31 10:05:36,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-12-31 10:05:36,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 89 transitions. [2018-12-31 10:05:36,117 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 89 transitions. Word has length 132 [2018-12-31 10:05:36,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:05:36,118 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 89 transitions. [2018-12-31 10:05:36,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-31 10:05:36,119 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 89 transitions. [2018-12-31 10:05:36,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-12-31 10:05:36,122 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:05:36,122 INFO L402 BasicCegarLoop]: trace histogram [29, 29, 23, 14, 14, 14, 14, 14, 14, 14, 9, 6, 1, 1, 1, 1, 1, 1] [2018-12-31 10:05:36,123 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:05:36,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:05:36,123 INFO L82 PathProgramCache]: Analyzing trace with hash 2144955960, now seen corresponding path program 7 times [2018-12-31 10:05:36,123 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:05:36,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:05:36,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:36,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:05:36,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:36,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:05:36,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 403 proven. 124 refuted. 0 times theorem prover too weak. 1714 trivial. 0 not checked. [2018-12-31 10:05:36,485 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:05:36,485 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 10:05:36,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:05:36,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:05:36,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:05:36,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 117 proven. 639 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2018-12-31 10:05:36,676 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:05:36,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 10 [2018-12-31 10:05:36,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-31 10:05:36,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-31 10:05:36,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-12-31 10:05:36,678 INFO L87 Difference]: Start difference. First operand 49 states and 89 transitions. Second operand 10 states. [2018-12-31 10:05:37,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:05:37,050 INFO L93 Difference]: Finished difference Result 58 states and 111 transitions. [2018-12-31 10:05:37,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-31 10:05:37,051 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 200 [2018-12-31 10:05:37,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:05:37,054 INFO L225 Difference]: With dead ends: 58 [2018-12-31 10:05:37,054 INFO L226 Difference]: Without dead ends: 54 [2018-12-31 10:05:37,055 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2018-12-31 10:05:37,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-12-31 10:05:37,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-12-31 10:05:37,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-12-31 10:05:37,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 107 transitions. [2018-12-31 10:05:37,067 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 107 transitions. Word has length 200 [2018-12-31 10:05:37,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:05:37,068 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 107 transitions. [2018-12-31 10:05:37,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-31 10:05:37,069 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 107 transitions. [2018-12-31 10:05:37,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2018-12-31 10:05:37,081 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:05:37,082 INFO L402 BasicCegarLoop]: trace histogram [77, 77, 68, 38, 38, 38, 38, 38, 38, 38, 30, 9, 1, 1, 1, 1, 1, 1] [2018-12-31 10:05:37,082 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:05:37,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:05:37,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1003332153, now seen corresponding path program 8 times [2018-12-31 10:05:37,083 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:05:37,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:05:37,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:37,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:05:37,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:37,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:05:37,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16794 backedges. 560 proven. 1384 refuted. 0 times theorem prover too weak. 14850 trivial. 0 not checked. [2018-12-31 10:05:37,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:05:37,453 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 10:05:37,464 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 10:05:37,625 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 10:05:37,625 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:05:37,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:05:38,681 INFO L134 CoverageAnalysis]: Checked inductivity of 16794 backedges. 426 proven. 2326 refuted. 0 times theorem prover too weak. 14042 trivial. 0 not checked. [2018-12-31 10:05:38,700 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:05:38,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 14 [2018-12-31 10:05:38,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-31 10:05:38,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-31 10:05:38,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2018-12-31 10:05:38,703 INFO L87 Difference]: Start difference. First operand 54 states and 107 transitions. Second operand 14 states. [2018-12-31 10:05:39,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:05:39,280 INFO L93 Difference]: Finished difference Result 136 states and 301 transitions. [2018-12-31 10:05:39,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-12-31 10:05:39,281 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 533 [2018-12-31 10:05:39,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:05:39,283 INFO L225 Difference]: With dead ends: 136 [2018-12-31 10:05:39,283 INFO L226 Difference]: Without dead ends: 84 [2018-12-31 10:05:39,285 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 527 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=233, Invalid=523, Unknown=0, NotChecked=0, Total=756 [2018-12-31 10:05:39,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-12-31 10:05:39,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2018-12-31 10:05:39,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-12-31 10:05:39,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 115 transitions. [2018-12-31 10:05:39,298 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 115 transitions. Word has length 533 [2018-12-31 10:05:39,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:05:39,298 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 115 transitions. [2018-12-31 10:05:39,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-31 10:05:39,299 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 115 transitions. [2018-12-31 10:05:39,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2018-12-31 10:05:39,316 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:05:39,317 INFO L402 BasicCegarLoop]: trace histogram [81, 81, 65, 40, 40, 40, 40, 40, 40, 40, 25, 16, 1, 1, 1, 1, 1, 1] [2018-12-31 10:05:39,317 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:05:39,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:05:39,317 INFO L82 PathProgramCache]: Analyzing trace with hash -475858480, now seen corresponding path program 9 times [2018-12-31 10:05:39,317 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:05:39,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:05:39,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:39,319 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:05:39,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:05:39,880 INFO L134 CoverageAnalysis]: Checked inductivity of 18160 backedges. 2560 proven. 122 refuted. 0 times theorem prover too weak. 15478 trivial. 0 not checked. [2018-12-31 10:05:39,881 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:05:39,881 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:05:39,890 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 10:05:40,001 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-12-31 10:05:40,001 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:05:40,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:05:40,242 INFO L134 CoverageAnalysis]: Checked inductivity of 18160 backedges. 2468 proven. 73 refuted. 0 times theorem prover too weak. 15619 trivial. 0 not checked. [2018-12-31 10:05:40,262 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:05:40,263 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 14 [2018-12-31 10:05:40,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-31 10:05:40,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-31 10:05:40,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2018-12-31 10:05:40,265 INFO L87 Difference]: Start difference. First operand 82 states and 115 transitions. Second operand 14 states. [2018-12-31 10:05:40,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:05:40,664 INFO L93 Difference]: Finished difference Result 177 states and 275 transitions. [2018-12-31 10:05:40,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-31 10:05:40,665 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 554 [2018-12-31 10:05:40,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:05:40,669 INFO L225 Difference]: With dead ends: 177 [2018-12-31 10:05:40,669 INFO L226 Difference]: Without dead ends: 96 [2018-12-31 10:05:40,670 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 556 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2018-12-31 10:05:40,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-12-31 10:05:40,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2018-12-31 10:05:40,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-12-31 10:05:40,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 127 transitions. [2018-12-31 10:05:40,682 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 127 transitions. Word has length 554 [2018-12-31 10:05:40,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:05:40,684 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 127 transitions. [2018-12-31 10:05:40,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-31 10:05:40,684 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 127 transitions. [2018-12-31 10:05:40,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2018-12-31 10:05:40,687 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:05:40,687 INFO L402 BasicCegarLoop]: trace histogram [67, 67, 54, 33, 33, 33, 33, 33, 33, 33, 21, 13, 1, 1, 1, 1, 1, 1] [2018-12-31 10:05:40,687 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:05:40,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:05:40,688 INFO L82 PathProgramCache]: Analyzing trace with hash 187396788, now seen corresponding path program 10 times [2018-12-31 10:05:40,688 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:05:40,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:05:40,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:40,689 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:05:40,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:05:41,645 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 1412 proven. 592 refuted. 0 times theorem prover too weak. 10383 trivial. 0 not checked. [2018-12-31 10:05:41,645 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:05:41,645 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:05:41,655 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 10:05:41,758 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 10:05:41,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:05:41,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:05:42,093 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 361 proven. 2270 refuted. 0 times theorem prover too weak. 9756 trivial. 0 not checked. [2018-12-31 10:05:42,127 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:05:42,127 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 12 [2018-12-31 10:05:42,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-31 10:05:42,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-31 10:05:42,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-12-31 10:05:42,129 INFO L87 Difference]: Start difference. First operand 91 states and 127 transitions. Second operand 12 states. [2018-12-31 10:05:42,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:05:42,430 INFO L93 Difference]: Finished difference Result 100 states and 145 transitions. [2018-12-31 10:05:42,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-31 10:05:42,431 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 459 [2018-12-31 10:05:42,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:05:42,435 INFO L225 Difference]: With dead ends: 100 [2018-12-31 10:05:42,435 INFO L226 Difference]: Without dead ends: 96 [2018-12-31 10:05:42,436 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-12-31 10:05:42,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-12-31 10:05:42,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-12-31 10:05:42,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-12-31 10:05:42,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 141 transitions. [2018-12-31 10:05:42,448 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 141 transitions. Word has length 459 [2018-12-31 10:05:42,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:05:42,449 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 141 transitions. [2018-12-31 10:05:42,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-31 10:05:42,450 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 141 transitions. [2018-12-31 10:05:42,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 855 [2018-12-31 10:05:42,456 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:05:42,457 INFO L402 BasicCegarLoop]: trace histogram [125, 125, 101, 62, 62, 62, 62, 62, 62, 62, 39, 24, 1, 1, 1, 1, 1, 1] [2018-12-31 10:05:42,457 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:05:42,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:05:42,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1206433902, now seen corresponding path program 11 times [2018-12-31 10:05:42,458 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:05:42,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:05:42,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:42,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:05:42,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:42,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:05:43,157 INFO L134 CoverageAnalysis]: Checked inductivity of 43614 backedges. 743 proven. 4468 refuted. 0 times theorem prover too weak. 38403 trivial. 0 not checked. [2018-12-31 10:05:43,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:05:43,158 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:05:43,171 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 10:05:43,676 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 92 check-sat command(s) [2018-12-31 10:05:43,676 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:05:43,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:05:44,299 INFO L134 CoverageAnalysis]: Checked inductivity of 43614 backedges. 6279 proven. 1865 refuted. 0 times theorem prover too weak. 35470 trivial. 0 not checked. [2018-12-31 10:05:44,319 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:05:44,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 23 [2018-12-31 10:05:44,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-12-31 10:05:44,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-12-31 10:05:44,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2018-12-31 10:05:44,322 INFO L87 Difference]: Start difference. First operand 96 states and 141 transitions. Second operand 23 states. [2018-12-31 10:05:47,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:05:47,167 INFO L93 Difference]: Finished difference Result 264 states and 561 transitions. [2018-12-31 10:05:47,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-12-31 10:05:47,168 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 854 [2018-12-31 10:05:47,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:05:47,173 INFO L225 Difference]: With dead ends: 264 [2018-12-31 10:05:47,173 INFO L226 Difference]: Without dead ends: 170 [2018-12-31 10:05:47,175 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 908 GetRequests, 851 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=673, Invalid=2749, Unknown=0, NotChecked=0, Total=3422 [2018-12-31 10:05:47,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-12-31 10:05:47,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 134. [2018-12-31 10:05:47,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-12-31 10:05:47,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 199 transitions. [2018-12-31 10:05:47,193 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 199 transitions. Word has length 854 [2018-12-31 10:05:47,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:05:47,194 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 199 transitions. [2018-12-31 10:05:47,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-12-31 10:05:47,194 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 199 transitions. [2018-12-31 10:05:47,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1386 [2018-12-31 10:05:47,209 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:05:47,210 INFO L402 BasicCegarLoop]: trace histogram [203, 203, 164, 101, 101, 101, 101, 101, 101, 101, 63, 39, 1, 1, 1, 1, 1, 1] [2018-12-31 10:05:47,210 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:05:47,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:05:47,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1881094982, now seen corresponding path program 12 times [2018-12-31 10:05:47,211 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:05:47,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:05:47,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:47,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:05:47,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:47,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:05:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 115578 backedges. 6431 proven. 3718 refuted. 0 times theorem prover too weak. 105429 trivial. 0 not checked. [2018-12-31 10:05:48,682 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:05:48,683 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:05:48,691 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 10:05:49,678 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 146 check-sat command(s) [2018-12-31 10:05:49,678 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:05:49,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:05:51,898 INFO L134 CoverageAnalysis]: Checked inductivity of 115578 backedges. 9568 proven. 1014 refuted. 0 times theorem prover too weak. 104996 trivial. 0 not checked. [2018-12-31 10:05:51,920 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:05:51,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2018-12-31 10:05:51,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-12-31 10:05:51,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-12-31 10:05:51,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2018-12-31 10:05:51,924 INFO L87 Difference]: Start difference. First operand 134 states and 199 transitions. Second operand 23 states. [2018-12-31 10:05:53,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:05:53,338 INFO L93 Difference]: Finished difference Result 323 states and 616 transitions. [2018-12-31 10:05:53,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-12-31 10:05:53,339 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1385 [2018-12-31 10:05:53,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:05:53,346 INFO L225 Difference]: With dead ends: 323 [2018-12-31 10:05:53,347 INFO L226 Difference]: Without dead ends: 167 [2018-12-31 10:05:53,350 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1433 GetRequests, 1386 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=514, Invalid=1838, Unknown=0, NotChecked=0, Total=2352 [2018-12-31 10:05:53,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-12-31 10:05:53,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 131. [2018-12-31 10:05:53,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-12-31 10:05:53,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 177 transitions. [2018-12-31 10:05:53,368 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 177 transitions. Word has length 1385 [2018-12-31 10:05:53,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:05:53,370 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 177 transitions. [2018-12-31 10:05:53,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-12-31 10:05:53,370 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 177 transitions. [2018-12-31 10:05:53,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1209 [2018-12-31 10:05:53,385 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:05:53,386 INFO L402 BasicCegarLoop]: trace histogram [177, 177, 143, 88, 88, 88, 88, 88, 88, 88, 55, 34, 1, 1, 1, 1, 1, 1] [2018-12-31 10:05:53,386 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:05:53,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:05:53,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1577357454, now seen corresponding path program 13 times [2018-12-31 10:05:53,388 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:05:53,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:05:53,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:53,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:05:53,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:05:56,476 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 0 proven. 28921 refuted. 0 times theorem prover too weak. 58848 trivial. 0 not checked. [2018-12-31 10:05:56,476 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:05:56,476 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:05:56,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:05:56,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:05:56,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:06:00,595 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 0 proven. 28921 refuted. 0 times theorem prover too weak. 58848 trivial. 0 not checked. [2018-12-31 10:06:00,616 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:06:00,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 40 [2018-12-31 10:06:00,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-12-31 10:06:00,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-12-31 10:06:00,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2018-12-31 10:06:00,619 INFO L87 Difference]: Start difference. First operand 131 states and 177 transitions. Second operand 40 states. [2018-12-31 10:06:01,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:06:01,444 INFO L93 Difference]: Finished difference Result 144 states and 202 transitions. [2018-12-31 10:06:01,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-12-31 10:06:01,445 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 1208 [2018-12-31 10:06:01,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:06:01,450 INFO L225 Difference]: With dead ends: 144 [2018-12-31 10:06:01,450 INFO L226 Difference]: Without dead ends: 140 [2018-12-31 10:06:01,453 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1564 GetRequests, 1436 SyntacticMatches, 90 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2018-12-31 10:06:01,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-12-31 10:06:01,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 136. [2018-12-31 10:06:01,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-12-31 10:06:01,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 184 transitions. [2018-12-31 10:06:01,468 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 184 transitions. Word has length 1208 [2018-12-31 10:06:01,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:06:01,468 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 184 transitions. [2018-12-31 10:06:01,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-12-31 10:06:01,470 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 184 transitions. [2018-12-31 10:06:01,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1672 [2018-12-31 10:06:01,493 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:06:01,494 INFO L402 BasicCegarLoop]: trace histogram [245, 245, 198, 122, 122, 122, 122, 122, 122, 122, 76, 47, 1, 1, 1, 1, 1, 1] [2018-12-31 10:06:01,494 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:06:01,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:06:01,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1824040433, now seen corresponding path program 14 times [2018-12-31 10:06:01,496 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:06:01,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:06:01,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:06:01,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:06:01,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:06:01,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:06:02,431 WARN L181 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 8 [2018-12-31 10:06:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 168587 backedges. 2138 proven. 11524 refuted. 0 times theorem prover too weak. 154925 trivial. 0 not checked. [2018-12-31 10:06:03,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:06:03,619 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:06:03,629 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 10:06:04,086 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 10:06:04,086 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:06:04,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:06:05,146 INFO L134 CoverageAnalysis]: Checked inductivity of 168587 backedges. 2156 proven. 11497 refuted. 0 times theorem prover too weak. 154934 trivial. 0 not checked. [2018-12-31 10:06:05,167 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:06:05,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2018-12-31 10:06:05,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-31 10:06:05,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-31 10:06:05,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2018-12-31 10:06:05,170 INFO L87 Difference]: Start difference. First operand 136 states and 184 transitions. Second operand 18 states. [2018-12-31 10:06:05,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:06:05,479 INFO L93 Difference]: Finished difference Result 139 states and 192 transitions. [2018-12-31 10:06:05,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-31 10:06:05,480 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1671 [2018-12-31 10:06:05,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:06:05,483 INFO L225 Difference]: With dead ends: 139 [2018-12-31 10:06:05,483 INFO L226 Difference]: Without dead ends: 0 [2018-12-31 10:06:05,485 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1704 GetRequests, 1678 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=241, Invalid=461, Unknown=0, NotChecked=0, Total=702 [2018-12-31 10:06:05,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-31 10:06:05,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-31 10:06:05,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-31 10:06:05,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-31 10:06:05,486 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1671 [2018-12-31 10:06:05,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:06:05,488 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-31 10:06:05,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-31 10:06:05,488 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-31 10:06:05,489 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-31 10:06:05,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-31 10:06:05,805 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-31 10:06:05,812 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-31 10:06:10,384 WARN L181 SmtUtils]: Spent 4.54 s on a formula simplification. DAG size of input: 170 DAG size of output: 74 [2018-12-31 10:06:10,734 WARN L181 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 8 [2018-12-31 10:06:10,742 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-31 10:06:10,742 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2018-12-31 10:06:10,742 INFO L444 ceAbstractionStarter]: At program point L29(lines 23 30) the Hoare annotation is: (<= 10 ULTIMATE.start_main_~x~0) [2018-12-31 10:06:10,743 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-31 10:06:10,744 INFO L448 ceAbstractionStarter]: For program point L27(line 27) no Hoare annotation was computed. [2018-12-31 10:06:10,744 INFO L448 ceAbstractionStarter]: For program point L26(lines 26 28) no Hoare annotation was computed. [2018-12-31 10:06:10,745 INFO L444 ceAbstractionStarter]: At program point L25(line 25) the Hoare annotation is: (and (<= 10 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 10)) [2018-12-31 10:06:10,745 INFO L448 ceAbstractionStarter]: For program point L25-1(line 25) no Hoare annotation was computed. [2018-12-31 10:06:10,745 INFO L448 ceAbstractionStarter]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2018-12-31 10:06:10,745 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2018-12-31 10:06:10,745 INFO L448 ceAbstractionStarter]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2018-12-31 10:06:10,745 INFO L448 ceAbstractionStarter]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2018-12-31 10:06:10,745 INFO L444 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (<= fibo_~n |fibo_#in~n|) (<= |fibo_#in~n| fibo_~n) (< 1 fibo_~n)) [2018-12-31 10:06:10,745 INFO L448 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2018-12-31 10:06:10,746 INFO L444 ceAbstractionStarter]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse5 (<= fibo_~n |fibo_#in~n|)) (.cse6 (<= |fibo_#in~n| fibo_~n))) (let ((.cse0 (and (<= 7 |fibo_#in~n|) (<= |fibo_#t~ret0| 8) .cse5 .cse6 (<= 8 |fibo_#t~ret0|) (<= |fibo_#in~n| 7))) (.cse1 (and .cse5 (<= 10 |fibo_#in~n|) .cse6 (<= 34 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 34))) (.cse2 (and (<= |fibo_#t~ret0| 21) .cse5 (<= 21 |fibo_#t~ret0|) (<= 9 fibo_~n) (<= |fibo_#in~n| 9))) (.cse3 (and .cse5 .cse6 (<= 11 |fibo_#in~n|))) (.cse4 (and (<= 13 |fibo_#t~ret0|) (<= |fibo_#in~n| 8) .cse5 (<= |fibo_#t~ret0| 13) (<= 8 fibo_~n)))) (and (or (and (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2)) (or (< 4 |fibo_#in~n|) (< |fibo_#in~n| 4))) (or (<= |fibo_#in~n| 5) (and (<= |fibo_#t~ret0| 5) (<= 5 |fibo_#t~ret0|)) .cse0 .cse1 .cse2 .cse3 .cse4) (or (or (< 5 |fibo_#in~n|) (< |fibo_#in~n| 5)) (and (<= 3 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 3))) (< 1 |fibo_#in~n|) (or (< 3 |fibo_#in~n|) (and (<= |fibo_#t~ret0| 1) (<= 1 |fibo_#t~ret0|))) (or .cse0 .cse1 .cse2 .cse3 (and (<= |fibo_#in~n| 6) .cse5 .cse6) .cse4)))) [2018-12-31 10:06:10,747 INFO L448 ceAbstractionStarter]: For program point L8(lines 8 12) no Hoare annotation was computed. [2018-12-31 10:06:10,747 INFO L448 ceAbstractionStarter]: For program point L11-3(line 11) no Hoare annotation was computed. [2018-12-31 10:06:10,747 INFO L448 ceAbstractionStarter]: For program point L6(lines 6 12) no Hoare annotation was computed. [2018-12-31 10:06:10,747 INFO L451 ceAbstractionStarter]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2018-12-31 10:06:10,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.12 10:06:10 BoogieIcfgContainer [2018-12-31 10:06:10,769 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-31 10:06:10,770 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-31 10:06:10,770 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-31 10:06:10,770 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-31 10:06:10,771 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 10:05:29" (3/4) ... [2018-12-31 10:06:10,776 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-31 10:06:10,785 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo [2018-12-31 10:06:10,790 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-12-31 10:06:10,790 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-31 10:06:10,834 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-12-31 10:06:10,835 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-31 10:06:10,836 INFO L168 Benchmark]: Toolchain (without parser) took 42354.64 ms. Allocated memory was 1.0 GB in the beginning and 3.1 GB in the end (delta: 2.1 GB). Free memory was 946.0 MB in the beginning and 867.3 MB in the end (delta: 78.7 MB). Peak memory consumption was 2.2 GB. Max. memory is 11.5 GB. [2018-12-31 10:06:10,838 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 972.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 10:06:10,838 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.04 ms. Allocated memory is still 1.0 GB. Free memory was 946.0 MB in the beginning and 935.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-31 10:06:10,838 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.88 ms. Allocated memory is still 1.0 GB. Free memory is still 935.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 10:06:10,839 INFO L168 Benchmark]: Boogie Preprocessor took 18.66 ms. Allocated memory is still 1.0 GB. Free memory is still 935.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 10:06:10,839 INFO L168 Benchmark]: RCFGBuilder took 351.52 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 935.3 MB in the beginning and 1.1 GB in the end (delta: -181.2 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. [2018-12-31 10:06:10,842 INFO L168 Benchmark]: TraceAbstraction took 41553.38 ms. Allocated memory was 1.2 GB in the beginning and 3.1 GB in the end (delta: 1.9 GB). Free memory was 1.1 GB in the beginning and 867.3 MB in the end (delta: 249.2 MB). Peak memory consumption was 2.2 GB. Max. memory is 11.5 GB. [2018-12-31 10:06:10,843 INFO L168 Benchmark]: Witness Printer took 64.52 ms. Allocated memory is still 3.1 GB. Free memory is still 867.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 10:06:10,847 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 972.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 314.04 ms. Allocated memory is still 1.0 GB. Free memory was 946.0 MB in the beginning and 935.3 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 40.88 ms. Allocated memory is still 1.0 GB. Free memory is still 935.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.66 ms. Allocated memory is still 1.0 GB. Free memory is still 935.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 351.52 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 935.3 MB in the beginning and 1.1 GB in the end (delta: -181.2 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 41553.38 ms. Allocated memory was 1.2 GB in the beginning and 3.1 GB in the end (delta: 1.9 GB). Free memory was 1.1 GB in the beginning and 867.3 MB in the end (delta: 249.2 MB). Peak memory consumption was 2.2 GB. Max. memory is 11.5 GB. * Witness Printer took 64.52 ms. Allocated memory is still 3.1 GB. Free memory is still 867.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: 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: 23]: Loop Invariant Derived loop invariant: 10 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 19 locations, 1 error locations. SAFE Result, 41.4s OverallTime, 17 OverallIterations, 245 TraceHistogramMax, 10.1s AutomataDifference, 0.0s DeadEndRemovalTime, 5.2s HoareAnnotationTime, HoareTripleCheckerStatistics: 366 SDtfs, 658 SDslu, 2187 SDs, 0 SdLazy, 3863 SolverSat, 870 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8052 GetRequests, 7627 SyntacticMatches, 92 SemanticMatches, 333 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1933 ImplicationChecksByTransitivity, 14.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=136occurred in iteration=16, 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: 0.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 97 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 320 PreInvPairs, 521 NumberOfFragments, 249 HoareAnnotationTreeSize, 320 FomulaSimplifications, 2374 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 5 FomulaSimplificationsInter, 6357 FormulaSimplificationTreeSizeReductionInter, 4.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 3.4s SatisfiabilityAnalysisTime, 17.3s InterpolantComputationTime, 14777 NumberOfCodeBlocks, 13914 NumberOfCodeBlocksAsserted, 304 NumberOfCheckSat, 14745 ConstructedInterpolants, 0 QuantifiedInterpolants, 27200147 SizeOfPredicates, 94 NumberOfNonLiveVariables, 14431 ConjunctsInSsa, 898 ConjunctsInUnsatCore, 32 InterpolantComputations, 2 PerfectInterpolantSequences, 835284/935784 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...