java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label46_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-26 19:31:18,628 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 19:31:18,630 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 19:31:18,642 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 19:31:18,642 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 19:31:18,643 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 19:31:18,645 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 19:31:18,647 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 19:31:18,649 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 19:31:18,649 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 19:31:18,650 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 19:31:18,651 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 19:31:18,652 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 19:31:18,653 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 19:31:18,654 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 19:31:18,655 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 19:31:18,656 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 19:31:18,658 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 19:31:18,660 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 19:31:18,661 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 19:31:18,663 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 19:31:18,664 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 19:31:18,666 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 19:31:18,667 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 19:31:18,667 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 19:31:18,668 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 19:31:18,669 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 19:31:18,670 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 19:31:18,671 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 19:31:18,672 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 19:31:18,672 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 19:31:18,673 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-26 19:31:18,676 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-26 19:31:18,692 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 19:31:18,692 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 19:31:18,693 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 19:31:18,693 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 19:31:18,694 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 19:31:18,694 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 19:31:18,694 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 19:31:18,695 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 19:31:18,695 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 19:31:18,695 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 19:31:18,695 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 19:31:18,695 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 19:31:18,696 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 19:31:18,696 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 19:31:18,696 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 19:31:18,696 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 19:31:18,697 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 19:31:18,697 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 19:31:18,697 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 19:31:18,697 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 19:31:18,697 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 19:31:18,699 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 19:31:18,699 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 19:31:18,699 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 19:31:18,700 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 19:31:18,700 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 19:31:18,700 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 19:31:18,700 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-26 19:31:18,771 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 19:31:18,795 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 19:31:18,799 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 19:31:18,801 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 19:31:18,801 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 19:31:18,802 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label46_false-unreach-call.c [2018-10-26 19:31:18,882 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/bcba87dcf/2af0512505d14fefb52ccfa73594dea1/FLAGd5b901b84 [2018-10-26 19:31:19,591 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 19:31:19,592 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label46_false-unreach-call.c [2018-10-26 19:31:19,619 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/bcba87dcf/2af0512505d14fefb52ccfa73594dea1/FLAGd5b901b84 [2018-10-26 19:31:19,640 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/bcba87dcf/2af0512505d14fefb52ccfa73594dea1 [2018-10-26 19:31:19,652 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 19:31:19,654 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 19:31:19,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 19:31:19,656 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 19:31:19,662 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 19:31:19,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:31:19" (1/1) ... [2018-10-26 19:31:19,667 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5132971b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:31:19, skipping insertion in model container [2018-10-26 19:31:19,667 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:31:19" (1/1) ... [2018-10-26 19:31:19,678 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 19:31:19,786 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 19:31:20,737 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 19:31:20,743 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 19:31:20,977 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 19:31:20,997 INFO L193 MainTranslator]: Completed translation [2018-10-26 19:31:20,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:31:20 WrapperNode [2018-10-26 19:31:20,998 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 19:31:20,999 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 19:31:20,999 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 19:31:21,000 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 19:31:21,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:31:20" (1/1) ... [2018-10-26 19:31:21,058 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:31:20" (1/1) ... [2018-10-26 19:31:21,331 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 19:31:21,331 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 19:31:21,332 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 19:31:21,332 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 19:31:21,343 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:31:20" (1/1) ... [2018-10-26 19:31:21,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:31:20" (1/1) ... [2018-10-26 19:31:21,363 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:31:20" (1/1) ... [2018-10-26 19:31:21,363 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:31:20" (1/1) ... [2018-10-26 19:31:21,431 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:31:20" (1/1) ... [2018-10-26 19:31:21,448 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:31:20" (1/1) ... [2018-10-26 19:31:21,475 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:31:20" (1/1) ... [2018-10-26 19:31:21,490 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 19:31:21,491 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 19:31:21,491 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 19:31:21,491 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 19:31:21,492 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:31:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-26 19:31:21,559 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-26 19:31:21,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 19:31:21,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 19:31:28,557 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 19:31:28,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:31:28 BoogieIcfgContainer [2018-10-26 19:31:28,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 19:31:28,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 19:31:28,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 19:31:28,563 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 19:31:28,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:31:19" (1/3) ... [2018-10-26 19:31:28,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52a49d65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:31:28, skipping insertion in model container [2018-10-26 19:31:28,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:31:20" (2/3) ... [2018-10-26 19:31:28,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52a49d65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:31:28, skipping insertion in model container [2018-10-26 19:31:28,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:31:28" (3/3) ... [2018-10-26 19:31:28,567 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label46_false-unreach-call.c [2018-10-26 19:31:28,578 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 19:31:28,586 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 19:31:28,604 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 19:31:28,646 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 19:31:28,647 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 19:31:28,647 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 19:31:28,647 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 19:31:28,647 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 19:31:28,647 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 19:31:28,648 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 19:31:28,648 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 19:31:28,648 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 19:31:28,675 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states. [2018-10-26 19:31:28,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-26 19:31:28,683 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:31:28,684 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:31:28,686 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:31:28,692 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:31:28,692 INFO L82 PathProgramCache]: Analyzing trace with hash -809652462, now seen corresponding path program 1 times [2018-10-26 19:31:28,695 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:31:28,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:31:28,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:31:28,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:31:28,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:31:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:31:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:31:29,164 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:31:29,164 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 19:31:29,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:31:29,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:31:29,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:31:29,189 INFO L87 Difference]: Start difference. First operand 397 states. Second operand 4 states. [2018-10-26 19:31:35,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:31:35,809 INFO L93 Difference]: Finished difference Result 1458 states and 2766 transitions. [2018-10-26 19:31:35,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:31:35,812 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2018-10-26 19:31:35,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:31:35,842 INFO L225 Difference]: With dead ends: 1458 [2018-10-26 19:31:35,843 INFO L226 Difference]: Without dead ends: 1054 [2018-10-26 19:31:35,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:31:35,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2018-10-26 19:31:35,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1054. [2018-10-26 19:31:35,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1054 states. [2018-10-26 19:31:35,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1740 transitions. [2018-10-26 19:31:35,980 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1740 transitions. Word has length 17 [2018-10-26 19:31:35,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:31:35,980 INFO L481 AbstractCegarLoop]: Abstraction has 1054 states and 1740 transitions. [2018-10-26 19:31:35,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:31:35,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1740 transitions. [2018-10-26 19:31:35,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-26 19:31:35,985 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:31:35,986 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:31:35,987 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:31:35,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:31:35,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1981784088, now seen corresponding path program 1 times [2018-10-26 19:31:35,988 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:31:35,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:31:35,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:31:35,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:31:35,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:31:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:31:36,272 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:31:36,272 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:31:36,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 19:31:36,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 19:31:36,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 19:31:36,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 19:31:36,276 INFO L87 Difference]: Start difference. First operand 1054 states and 1740 transitions. Second operand 5 states. [2018-10-26 19:31:41,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:31:41,231 INFO L93 Difference]: Finished difference Result 3096 states and 5155 transitions. [2018-10-26 19:31:41,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 19:31:41,234 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 86 [2018-10-26 19:31:41,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:31:41,248 INFO L225 Difference]: With dead ends: 3096 [2018-10-26 19:31:41,249 INFO L226 Difference]: Without dead ends: 2044 [2018-10-26 19:31:41,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 19:31:41,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2018-10-26 19:31:41,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 2044. [2018-10-26 19:31:41,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2044 states. [2018-10-26 19:31:41,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 3111 transitions. [2018-10-26 19:31:41,309 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 3111 transitions. Word has length 86 [2018-10-26 19:31:41,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:31:41,310 INFO L481 AbstractCegarLoop]: Abstraction has 2044 states and 3111 transitions. [2018-10-26 19:31:41,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 19:31:41,310 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 3111 transitions. [2018-10-26 19:31:41,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-10-26 19:31:41,321 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:31:41,322 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:31:41,322 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:31:41,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:31:41,323 INFO L82 PathProgramCache]: Analyzing trace with hash -466720108, now seen corresponding path program 1 times [2018-10-26 19:31:41,323 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:31:41,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:31:41,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:31:41,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:31:41,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:31:41,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:31:42,019 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-26 19:31:42,254 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2018-10-26 19:31:42,602 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:31:42,603 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:31:42,603 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-26 19:31:42,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:31:42,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:31:42,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:31:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-10-26 19:31:43,085 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 19:31:43,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2018-10-26 19:31:43,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-26 19:31:43,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-26 19:31:43,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-10-26 19:31:43,091 INFO L87 Difference]: Start difference. First operand 2044 states and 3111 transitions. Second operand 8 states. [2018-10-26 19:31:44,943 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-26 19:31:55,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:31:55,681 INFO L93 Difference]: Finished difference Result 7716 states and 11157 transitions. [2018-10-26 19:31:55,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-26 19:31:55,682 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 253 [2018-10-26 19:31:55,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:31:55,718 INFO L225 Difference]: With dead ends: 7716 [2018-10-26 19:31:55,719 INFO L226 Difference]: Without dead ends: 5674 [2018-10-26 19:31:55,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2018-10-26 19:31:55,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5674 states. [2018-10-26 19:31:55,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5674 to 5344. [2018-10-26 19:31:55,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5344 states. [2018-10-26 19:31:55,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5344 states to 5344 states and 7393 transitions. [2018-10-26 19:31:55,868 INFO L78 Accepts]: Start accepts. Automaton has 5344 states and 7393 transitions. Word has length 253 [2018-10-26 19:31:55,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:31:55,869 INFO L481 AbstractCegarLoop]: Abstraction has 5344 states and 7393 transitions. [2018-10-26 19:31:55,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-26 19:31:55,869 INFO L276 IsEmpty]: Start isEmpty. Operand 5344 states and 7393 transitions. [2018-10-26 19:31:55,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2018-10-26 19:31:55,883 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:31:55,884 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:31:55,884 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:31:55,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:31:55,885 INFO L82 PathProgramCache]: Analyzing trace with hash -696319355, now seen corresponding path program 1 times [2018-10-26 19:31:55,885 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:31:55,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:31:55,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:31:55,887 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:31:55,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:31:55,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:31:56,405 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-26 19:31:56,838 WARN L179 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2018-10-26 19:31:57,479 WARN L179 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2018-10-26 19:31:57,686 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2018-10-26 19:31:57,931 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 222 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2018-10-26 19:31:57,931 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:31:57,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-26 19:31:57,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 19:31:57,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 19:31:57,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-26 19:31:57,933 INFO L87 Difference]: Start difference. First operand 5344 states and 7393 transitions. Second operand 7 states. [2018-10-26 19:32:02,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:32:02,093 INFO L93 Difference]: Finished difference Result 11075 states and 15185 transitions. [2018-10-26 19:32:02,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 19:32:02,096 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 359 [2018-10-26 19:32:02,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:32:02,123 INFO L225 Difference]: With dead ends: 11075 [2018-10-26 19:32:02,123 INFO L226 Difference]: Without dead ends: 5733 [2018-10-26 19:32:02,131 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-26 19:32:02,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5733 states. [2018-10-26 19:32:02,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5733 to 5674. [2018-10-26 19:32:02,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5674 states. [2018-10-26 19:32:02,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5674 states to 5674 states and 7729 transitions. [2018-10-26 19:32:02,234 INFO L78 Accepts]: Start accepts. Automaton has 5674 states and 7729 transitions. Word has length 359 [2018-10-26 19:32:02,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:32:02,235 INFO L481 AbstractCegarLoop]: Abstraction has 5674 states and 7729 transitions. [2018-10-26 19:32:02,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-26 19:32:02,235 INFO L276 IsEmpty]: Start isEmpty. Operand 5674 states and 7729 transitions. [2018-10-26 19:32:02,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2018-10-26 19:32:02,245 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:32:02,245 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:32:02,246 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:32:02,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:32:02,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1542528643, now seen corresponding path program 1 times [2018-10-26 19:32:02,246 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:32:02,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:32:02,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:32:02,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:32:02,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:32:02,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:32:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 484 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2018-10-26 19:32:02,682 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:32:02,682 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 19:32:02,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:32:02,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:32:02,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:32:02,684 INFO L87 Difference]: Start difference. First operand 5674 states and 7729 transitions. Second operand 4 states. [2018-10-26 19:32:06,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:32:06,413 INFO L93 Difference]: Finished difference Result 13986 states and 19291 transitions. [2018-10-26 19:32:06,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:32:06,413 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 412 [2018-10-26 19:32:06,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:32:06,436 INFO L225 Difference]: With dead ends: 13986 [2018-10-26 19:32:06,437 INFO L226 Difference]: Without dead ends: 7634 [2018-10-26 19:32:06,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:32:06,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7634 states. [2018-10-26 19:32:06,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7634 to 7634. [2018-10-26 19:32:06,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7634 states. [2018-10-26 19:32:06,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7634 states to 7634 states and 8369 transitions. [2018-10-26 19:32:06,570 INFO L78 Accepts]: Start accepts. Automaton has 7634 states and 8369 transitions. Word has length 412 [2018-10-26 19:32:06,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:32:06,570 INFO L481 AbstractCegarLoop]: Abstraction has 7634 states and 8369 transitions. [2018-10-26 19:32:06,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:32:06,571 INFO L276 IsEmpty]: Start isEmpty. Operand 7634 states and 8369 transitions. [2018-10-26 19:32:06,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 685 [2018-10-26 19:32:06,592 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:32:06,593 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:32:06,593 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:32:06,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:32:06,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1353601167, now seen corresponding path program 1 times [2018-10-26 19:32:06,594 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:32:06,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:32:06,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:32:06,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:32:06,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:32:06,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:32:07,140 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-26 19:32:07,326 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-10-26 19:32:08,712 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 611 proven. 65 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2018-10-26 19:32:08,712 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:32:08,712 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-26 19:32:08,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:32:08,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:32:08,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:32:09,306 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 565 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2018-10-26 19:32:09,328 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 19:32:09,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2018-10-26 19:32:09,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-26 19:32:09,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-26 19:32:09,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-10-26 19:32:09,331 INFO L87 Difference]: Start difference. First operand 7634 states and 8369 transitions. Second operand 9 states. [2018-10-26 19:32:15,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:32:15,916 INFO L93 Difference]: Finished difference Result 14623 states and 16014 transitions. [2018-10-26 19:32:15,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-26 19:32:15,916 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 684 [2018-10-26 19:32:15,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:32:15,944 INFO L225 Difference]: With dead ends: 14623 [2018-10-26 19:32:15,944 INFO L226 Difference]: Without dead ends: 7980 [2018-10-26 19:32:15,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 696 GetRequests, 683 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2018-10-26 19:32:15,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7980 states. [2018-10-26 19:32:16,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7980 to 7302. [2018-10-26 19:32:16,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7302 states. [2018-10-26 19:32:16,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7302 states to 7302 states and 7806 transitions. [2018-10-26 19:32:16,054 INFO L78 Accepts]: Start accepts. Automaton has 7302 states and 7806 transitions. Word has length 684 [2018-10-26 19:32:16,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:32:16,055 INFO L481 AbstractCegarLoop]: Abstraction has 7302 states and 7806 transitions. [2018-10-26 19:32:16,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-26 19:32:16,056 INFO L276 IsEmpty]: Start isEmpty. Operand 7302 states and 7806 transitions. [2018-10-26 19:32:16,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 811 [2018-10-26 19:32:16,086 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:32:16,087 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:32:16,087 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:32:16,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:32:16,088 INFO L82 PathProgramCache]: Analyzing trace with hash 432003776, now seen corresponding path program 1 times [2018-10-26 19:32:16,088 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:32:16,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:32:16,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:32:16,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:32:16,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:32:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:32:16,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1298 backedges. 1036 proven. 0 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2018-10-26 19:32:16,874 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:32:16,874 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 19:32:16,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:32:16,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:32:16,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:32:16,876 INFO L87 Difference]: Start difference. First operand 7302 states and 7806 transitions. Second operand 4 states. [2018-10-26 19:32:19,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:32:19,778 INFO L93 Difference]: Finished difference Result 17898 states and 19161 transitions. [2018-10-26 19:32:19,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:32:19,778 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 810 [2018-10-26 19:32:19,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:32:19,796 INFO L225 Difference]: With dead ends: 17898 [2018-10-26 19:32:19,797 INFO L226 Difference]: Without dead ends: 10260 [2018-10-26 19:32:19,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:32:19,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10260 states. [2018-10-26 19:32:19,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10260 to 9930. [2018-10-26 19:32:19,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9930 states. [2018-10-26 19:32:19,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9930 states to 9930 states and 10421 transitions. [2018-10-26 19:32:19,927 INFO L78 Accepts]: Start accepts. Automaton has 9930 states and 10421 transitions. Word has length 810 [2018-10-26 19:32:19,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:32:19,928 INFO L481 AbstractCegarLoop]: Abstraction has 9930 states and 10421 transitions. [2018-10-26 19:32:19,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:32:19,928 INFO L276 IsEmpty]: Start isEmpty. Operand 9930 states and 10421 transitions. [2018-10-26 19:32:19,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 874 [2018-10-26 19:32:19,948 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:32:19,949 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:32:19,949 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:32:19,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:32:19,950 INFO L82 PathProgramCache]: Analyzing trace with hash -739423767, now seen corresponding path program 1 times [2018-10-26 19:32:19,950 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:32:19,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:32:19,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:32:19,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:32:19,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:32:20,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:32:20,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 1053 proven. 0 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2018-10-26 19:32:20,720 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:32:20,721 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 19:32:20,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:32:20,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:32:20,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:32:20,722 INFO L87 Difference]: Start difference. First operand 9930 states and 10421 transitions. Second operand 4 states. [2018-10-26 19:32:22,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:32:22,701 INFO L93 Difference]: Finished difference Result 19858 states and 20851 transitions. [2018-10-26 19:32:22,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:32:22,702 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 873 [2018-10-26 19:32:22,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:32:22,716 INFO L225 Difference]: With dead ends: 19858 [2018-10-26 19:32:22,717 INFO L226 Difference]: Without dead ends: 9926 [2018-10-26 19:32:22,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:32:22,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9926 states. [2018-10-26 19:32:22,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9926 to 9926. [2018-10-26 19:32:22,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9926 states. [2018-10-26 19:32:22,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9926 states to 9926 states and 10260 transitions. [2018-10-26 19:32:22,835 INFO L78 Accepts]: Start accepts. Automaton has 9926 states and 10260 transitions. Word has length 873 [2018-10-26 19:32:22,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:32:22,836 INFO L481 AbstractCegarLoop]: Abstraction has 9926 states and 10260 transitions. [2018-10-26 19:32:22,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:32:22,836 INFO L276 IsEmpty]: Start isEmpty. Operand 9926 states and 10260 transitions. [2018-10-26 19:32:22,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1173 [2018-10-26 19:32:22,863 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:32:22,864 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:32:22,864 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:32:22,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:32:22,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1285557528, now seen corresponding path program 1 times [2018-10-26 19:32:22,865 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:32:22,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:32:22,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:32:22,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:32:22,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:32:22,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:32:23,709 WARN L179 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 10 [2018-10-26 19:32:24,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2676 backedges. 1458 proven. 0 refuted. 0 times theorem prover too weak. 1218 trivial. 0 not checked. [2018-10-26 19:32:24,613 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:32:24,613 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 19:32:24,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:32:24,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:32:24,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:32:24,615 INFO L87 Difference]: Start difference. First operand 9926 states and 10260 transitions. Second operand 4 states. [2018-10-26 19:32:27,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:32:27,144 INFO L93 Difference]: Finished difference Result 25130 states and 25980 transitions. [2018-10-26 19:32:27,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:32:27,145 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1172 [2018-10-26 19:32:27,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:32:27,164 INFO L225 Difference]: With dead ends: 25130 [2018-10-26 19:32:27,165 INFO L226 Difference]: Without dead ends: 14543 [2018-10-26 19:32:27,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:32:27,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14543 states. [2018-10-26 19:32:27,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14543 to 14543. [2018-10-26 19:32:27,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14543 states. [2018-10-26 19:32:27,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14543 states to 14543 states and 14934 transitions. [2018-10-26 19:32:27,336 INFO L78 Accepts]: Start accepts. Automaton has 14543 states and 14934 transitions. Word has length 1172 [2018-10-26 19:32:27,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:32:27,337 INFO L481 AbstractCegarLoop]: Abstraction has 14543 states and 14934 transitions. [2018-10-26 19:32:27,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:32:27,337 INFO L276 IsEmpty]: Start isEmpty. Operand 14543 states and 14934 transitions. [2018-10-26 19:32:27,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1253 [2018-10-26 19:32:27,370 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:32:27,372 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:32:27,372 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:32:27,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:32:27,373 INFO L82 PathProgramCache]: Analyzing trace with hash 18154934, now seen corresponding path program 1 times [2018-10-26 19:32:27,373 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:32:27,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:32:27,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:32:27,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:32:27,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:32:27,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:32:28,339 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-26 19:32:28,619 WARN L179 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2018-10-26 19:32:30,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2853 backedges. 1495 proven. 440 refuted. 0 times theorem prover too weak. 918 trivial. 0 not checked. [2018-10-26 19:32:30,283 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:32:30,283 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-26 19:32:30,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:32:30,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:32:30,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:32:32,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2853 backedges. 1716 proven. 0 refuted. 0 times theorem prover too weak. 1137 trivial. 0 not checked. [2018-10-26 19:32:32,077 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 19:32:32,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2018-10-26 19:32:32,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-26 19:32:32,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-26 19:32:32,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-10-26 19:32:32,080 INFO L87 Difference]: Start difference. First operand 14543 states and 14934 transitions. Second operand 9 states. [2018-10-26 19:32:34,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:32:34,909 INFO L93 Difference]: Finished difference Result 26245 states and 26981 transitions. [2018-10-26 19:32:34,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 19:32:34,910 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1252 [2018-10-26 19:32:34,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:32:34,925 INFO L225 Difference]: With dead ends: 26245 [2018-10-26 19:32:34,926 INFO L226 Difference]: Without dead ends: 14675 [2018-10-26 19:32:34,936 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1263 GetRequests, 1253 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-10-26 19:32:34,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14675 states. [2018-10-26 19:32:35,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14675 to 14213. [2018-10-26 19:32:35,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14213 states. [2018-10-26 19:32:35,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14213 states to 14213 states and 14559 transitions. [2018-10-26 19:32:35,094 INFO L78 Accepts]: Start accepts. Automaton has 14213 states and 14559 transitions. Word has length 1252 [2018-10-26 19:32:35,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:32:35,096 INFO L481 AbstractCegarLoop]: Abstraction has 14213 states and 14559 transitions. [2018-10-26 19:32:35,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-26 19:32:35,096 INFO L276 IsEmpty]: Start isEmpty. Operand 14213 states and 14559 transitions. [2018-10-26 19:32:35,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1387 [2018-10-26 19:32:35,130 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:32:35,131 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:32:35,131 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:32:35,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:32:35,132 INFO L82 PathProgramCache]: Analyzing trace with hash -865905874, now seen corresponding path program 1 times [2018-10-26 19:32:35,132 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:32:35,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:32:35,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:32:35,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:32:35,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:32:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:32:35,865 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-26 19:32:36,068 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-26 19:32:36,338 WARN L179 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-10-26 19:32:36,647 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-26 19:32:38,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3239 backedges. 2334 proven. 0 refuted. 0 times theorem prover too weak. 905 trivial. 0 not checked. [2018-10-26 19:32:38,586 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:32:38,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-26 19:32:38,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 19:32:38,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 19:32:38,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-26 19:32:38,588 INFO L87 Difference]: Start difference. First operand 14213 states and 14559 transitions. Second operand 6 states. [2018-10-26 19:32:41,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:32:41,883 INFO L93 Difference]: Finished difference Result 26117 states and 26779 transitions. [2018-10-26 19:32:41,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 19:32:41,883 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1386 [2018-10-26 19:32:41,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:32:41,908 INFO L225 Difference]: With dead ends: 26117 [2018-10-26 19:32:41,908 INFO L226 Difference]: Without dead ends: 14877 [2018-10-26 19:32:41,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-26 19:32:41,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14877 states. [2018-10-26 19:32:42,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14877 to 14543. [2018-10-26 19:32:42,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14543 states. [2018-10-26 19:32:42,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14543 states to 14543 states and 14893 transitions. [2018-10-26 19:32:42,121 INFO L78 Accepts]: Start accepts. Automaton has 14543 states and 14893 transitions. Word has length 1386 [2018-10-26 19:32:42,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:32:42,122 INFO L481 AbstractCegarLoop]: Abstraction has 14543 states and 14893 transitions. [2018-10-26 19:32:42,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 19:32:42,122 INFO L276 IsEmpty]: Start isEmpty. Operand 14543 states and 14893 transitions. [2018-10-26 19:32:42,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1420 [2018-10-26 19:32:42,164 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:32:42,165 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:32:42,165 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:32:42,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:32:42,166 INFO L82 PathProgramCache]: Analyzing trace with hash 994630025, now seen corresponding path program 1 times [2018-10-26 19:32:42,166 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:32:42,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:32:42,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:32:42,168 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:32:42,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:32:42,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:32:43,364 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-26 19:32:43,735 WARN L179 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-10-26 19:32:46,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3821 backedges. 1843 proven. 243 refuted. 0 times theorem prover too weak. 1735 trivial. 0 not checked. [2018-10-26 19:32:46,907 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:32:46,907 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-26 19:32:46,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:32:47,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:32:47,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:32:48,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3821 backedges. 1843 proven. 0 refuted. 0 times theorem prover too weak. 1978 trivial. 0 not checked. [2018-10-26 19:32:48,973 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 19:32:48,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 9 [2018-10-26 19:32:48,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-26 19:32:48,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-26 19:32:48,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-10-26 19:32:48,976 INFO L87 Difference]: Start difference. First operand 14543 states and 14893 transitions. Second operand 10 states. [2018-10-26 19:32:56,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:32:56,247 INFO L93 Difference]: Finished difference Result 28098 states and 28817 transitions. [2018-10-26 19:32:56,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-26 19:32:56,248 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1419 [2018-10-26 19:32:56,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:32:56,260 INFO L225 Difference]: With dead ends: 28098 [2018-10-26 19:32:56,261 INFO L226 Difference]: Without dead ends: 14211 [2018-10-26 19:32:56,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1434 GetRequests, 1418 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-10-26 19:32:56,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14211 states. [2018-10-26 19:32:56,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14211 to 13546. [2018-10-26 19:32:56,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13546 states. [2018-10-26 19:32:56,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13546 states to 13546 states and 13890 transitions. [2018-10-26 19:32:56,425 INFO L78 Accepts]: Start accepts. Automaton has 13546 states and 13890 transitions. Word has length 1419 [2018-10-26 19:32:56,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:32:56,426 INFO L481 AbstractCegarLoop]: Abstraction has 13546 states and 13890 transitions. [2018-10-26 19:32:56,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-26 19:32:56,426 INFO L276 IsEmpty]: Start isEmpty. Operand 13546 states and 13890 transitions. [2018-10-26 19:32:56,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1451 [2018-10-26 19:32:56,454 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:32:56,455 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:32:56,456 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:32:56,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:32:56,456 INFO L82 PathProgramCache]: Analyzing trace with hash -407160884, now seen corresponding path program 1 times [2018-10-26 19:32:56,457 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:32:56,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:32:56,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:32:56,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:32:56,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:32:56,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:32:57,130 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 9 [2018-10-26 19:32:59,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 1938 proven. 158 refuted. 0 times theorem prover too weak. 2414 trivial. 0 not checked. [2018-10-26 19:32:59,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:32:59,148 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-26 19:32:59,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:32:59,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:32:59,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:33:00,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 2096 proven. 0 refuted. 0 times theorem prover too weak. 2414 trivial. 0 not checked. [2018-10-26 19:33:00,796 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 19:33:00,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2018-10-26 19:33:00,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-26 19:33:00,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-26 19:33:00,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-10-26 19:33:00,798 INFO L87 Difference]: Start difference. First operand 13546 states and 13890 transitions. Second operand 10 states. [2018-10-26 19:33:09,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:33:09,852 INFO L93 Difference]: Finished difference Result 37048 states and 37996 transitions. [2018-10-26 19:33:09,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-26 19:33:09,853 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1450 [2018-10-26 19:33:09,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:33:09,879 INFO L225 Difference]: With dead ends: 37048 [2018-10-26 19:33:09,879 INFO L226 Difference]: Without dead ends: 21586 [2018-10-26 19:33:09,893 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1480 GetRequests, 1460 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2018-10-26 19:33:09,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21586 states. [2018-10-26 19:33:10,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21586 to 17834. [2018-10-26 19:33:10,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17834 states. [2018-10-26 19:33:10,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17834 states to 17834 states and 18210 transitions. [2018-10-26 19:33:10,130 INFO L78 Accepts]: Start accepts. Automaton has 17834 states and 18210 transitions. Word has length 1450 [2018-10-26 19:33:10,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:33:10,130 INFO L481 AbstractCegarLoop]: Abstraction has 17834 states and 18210 transitions. [2018-10-26 19:33:10,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-26 19:33:10,131 INFO L276 IsEmpty]: Start isEmpty. Operand 17834 states and 18210 transitions. [2018-10-26 19:33:10,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2020 [2018-10-26 19:33:10,168 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:33:10,169 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:33:10,169 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:33:10,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:33:10,170 INFO L82 PathProgramCache]: Analyzing trace with hash 638872038, now seen corresponding path program 1 times [2018-10-26 19:33:10,171 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:33:10,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:33:10,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:33:10,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:33:10,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:33:10,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:33:11,519 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-26 19:33:11,835 WARN L179 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2018-10-26 19:33:15,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7617 backedges. 4046 proven. 1877 refuted. 0 times theorem prover too weak. 1694 trivial. 0 not checked. [2018-10-26 19:33:15,113 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:33:15,113 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-26 19:33:15,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:33:15,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:33:15,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:33:17,953 INFO L134 CoverageAnalysis]: Checked inductivity of 7617 backedges. 4689 proven. 0 refuted. 0 times theorem prover too weak. 2928 trivial. 0 not checked. [2018-10-26 19:33:17,975 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 19:33:17,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2018-10-26 19:33:17,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-26 19:33:17,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-26 19:33:17,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-10-26 19:33:17,978 INFO L87 Difference]: Start difference. First operand 17834 states and 18210 transitions. Second operand 12 states. [2018-10-26 19:33:31,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:33:31,028 INFO L93 Difference]: Finished difference Result 37316 states and 38112 transitions. [2018-10-26 19:33:31,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-26 19:33:31,028 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 2019 [2018-10-26 19:33:31,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:33:31,046 INFO L225 Difference]: With dead ends: 37316 [2018-10-26 19:33:31,047 INFO L226 Difference]: Without dead ends: 18157 [2018-10-26 19:33:31,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2043 GetRequests, 2025 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2018-10-26 19:33:31,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18157 states. [2018-10-26 19:33:31,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18157 to 17497. [2018-10-26 19:33:31,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17497 states. [2018-10-26 19:33:31,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17497 states to 17497 states and 17825 transitions. [2018-10-26 19:33:31,204 INFO L78 Accepts]: Start accepts. Automaton has 17497 states and 17825 transitions. Word has length 2019 [2018-10-26 19:33:31,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:33:31,205 INFO L481 AbstractCegarLoop]: Abstraction has 17497 states and 17825 transitions. [2018-10-26 19:33:31,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-26 19:33:31,205 INFO L276 IsEmpty]: Start isEmpty. Operand 17497 states and 17825 transitions. [2018-10-26 19:33:31,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2395 [2018-10-26 19:33:31,242 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:33:31,243 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:33:31,244 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:33:31,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:33:31,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1188760933, now seen corresponding path program 1 times [2018-10-26 19:33:31,245 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:33:31,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:33:31,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:33:31,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:33:31,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:33:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:33:33,192 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-26 19:33:39,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10474 backedges. 4368 proven. 251 refuted. 0 times theorem prover too weak. 5855 trivial. 0 not checked. [2018-10-26 19:33:39,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:33:39,156 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-26 19:33:39,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:33:39,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:33:39,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:33:43,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10474 backedges. 5518 proven. 0 refuted. 0 times theorem prover too weak. 4956 trivial. 0 not checked. [2018-10-26 19:33:43,311 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 19:33:43,312 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2018-10-26 19:33:43,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-26 19:33:43,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-26 19:33:43,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-10-26 19:33:43,314 INFO L87 Difference]: Start difference. First operand 17497 states and 17825 transitions. Second operand 10 states. [2018-10-26 19:33:54,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:33:54,150 INFO L93 Difference]: Finished difference Result 39552 states and 40337 transitions. [2018-10-26 19:33:54,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-26 19:33:54,151 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 2394 [2018-10-26 19:33:54,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:33:54,169 INFO L225 Difference]: With dead ends: 39552 [2018-10-26 19:33:54,170 INFO L226 Difference]: Without dead ends: 21568 [2018-10-26 19:33:54,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2417 GetRequests, 2399 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2018-10-26 19:33:54,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21568 states. [2018-10-26 19:33:54,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21568 to 19791. [2018-10-26 19:33:54,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19791 states. [2018-10-26 19:33:54,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19791 states to 19791 states and 20093 transitions. [2018-10-26 19:33:54,363 INFO L78 Accepts]: Start accepts. Automaton has 19791 states and 20093 transitions. Word has length 2394 [2018-10-26 19:33:54,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:33:54,363 INFO L481 AbstractCegarLoop]: Abstraction has 19791 states and 20093 transitions. [2018-10-26 19:33:54,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-26 19:33:54,363 INFO L276 IsEmpty]: Start isEmpty. Operand 19791 states and 20093 transitions. [2018-10-26 19:33:54,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2518 [2018-10-26 19:33:54,412 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:33:54,413 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:33:54,413 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:33:54,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:33:54,414 INFO L82 PathProgramCache]: Analyzing trace with hash -556451108, now seen corresponding path program 1 times [2018-10-26 19:33:54,414 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:33:54,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:33:54,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:33:54,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:33:54,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:33:54,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:33:58,615 INFO L134 CoverageAnalysis]: Checked inductivity of 10889 backedges. 923 proven. 15 refuted. 0 times theorem prover too weak. 9951 trivial. 0 not checked. [2018-10-26 19:33:58,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:33:58,616 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-26 19:33:58,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:33:59,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:33:59,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:34:02,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10889 backedges. 923 proven. 15 refuted. 0 times theorem prover too weak. 9951 trivial. 0 not checked. [2018-10-26 19:34:02,594 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 19:34:02,595 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2018-10-26 19:34:02,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 19:34:02,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 19:34:02,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-26 19:34:02,598 INFO L87 Difference]: Start difference. First operand 19791 states and 20093 transitions. Second operand 6 states. [2018-10-26 19:34:06,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:34:06,217 INFO L93 Difference]: Finished difference Result 42220 states and 42858 transitions. [2018-10-26 19:34:06,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 19:34:06,217 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 2517 [2018-10-26 19:34:06,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:34:06,239 INFO L225 Difference]: With dead ends: 42220 [2018-10-26 19:34:06,240 INFO L226 Difference]: Without dead ends: 22431 [2018-10-26 19:34:06,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2521 GetRequests, 2516 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-26 19:34:06,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22431 states. [2018-10-26 19:34:06,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22431 to 20781. [2018-10-26 19:34:06,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20781 states. [2018-10-26 19:34:06,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20781 states to 20781 states and 21088 transitions. [2018-10-26 19:34:06,456 INFO L78 Accepts]: Start accepts. Automaton has 20781 states and 21088 transitions. Word has length 2517 [2018-10-26 19:34:06,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:34:06,456 INFO L481 AbstractCegarLoop]: Abstraction has 20781 states and 21088 transitions. [2018-10-26 19:34:06,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 19:34:06,457 INFO L276 IsEmpty]: Start isEmpty. Operand 20781 states and 21088 transitions. [2018-10-26 19:34:06,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2672 [2018-10-26 19:34:06,513 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:34:06,514 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:34:06,514 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:34:06,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:34:06,515 INFO L82 PathProgramCache]: Analyzing trace with hash 560175035, now seen corresponding path program 1 times [2018-10-26 19:34:06,515 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:34:06,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:34:06,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:34:06,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:34:06,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:34:06,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:34:08,600 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-26 19:34:17,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12289 backedges. 9713 proven. 482 refuted. 0 times theorem prover too weak. 2094 trivial. 0 not checked. [2018-10-26 19:34:17,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:34:17,083 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-26 19:34:17,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:34:17,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:34:17,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:34:24,671 INFO L134 CoverageAnalysis]: Checked inductivity of 12289 backedges. 9148 proven. 816 refuted. 0 times theorem prover too weak. 2325 trivial. 0 not checked. [2018-10-26 19:34:24,693 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 19:34:24,694 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2018-10-26 19:34:24,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-26 19:34:24,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-26 19:34:24,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2018-10-26 19:34:24,697 INFO L87 Difference]: Start difference. First operand 20781 states and 21088 transitions. Second operand 13 states. [2018-10-26 19:34:33,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:34:33,779 INFO L93 Difference]: Finished difference Result 39414 states and 40022 transitions. [2018-10-26 19:34:33,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-26 19:34:33,780 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 2671 [2018-10-26 19:34:33,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:34:33,801 INFO L225 Difference]: With dead ends: 39414 [2018-10-26 19:34:33,801 INFO L226 Difference]: Without dead ends: 22925 [2018-10-26 19:34:33,812 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2695 GetRequests, 2674 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2018-10-26 19:34:33,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22925 states. [2018-10-26 19:34:34,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22925 to 20451. [2018-10-26 19:34:34,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20451 states. [2018-10-26 19:34:34,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20451 states to 20451 states and 20730 transitions. [2018-10-26 19:34:34,030 INFO L78 Accepts]: Start accepts. Automaton has 20451 states and 20730 transitions. Word has length 2671 [2018-10-26 19:34:34,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:34:34,032 INFO L481 AbstractCegarLoop]: Abstraction has 20451 states and 20730 transitions. [2018-10-26 19:34:34,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-26 19:34:34,032 INFO L276 IsEmpty]: Start isEmpty. Operand 20451 states and 20730 transitions. [2018-10-26 19:34:34,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2740 [2018-10-26 19:34:34,094 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:34:34,095 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:34:34,096 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:34:34,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:34:34,097 INFO L82 PathProgramCache]: Analyzing trace with hash 931094297, now seen corresponding path program 1 times [2018-10-26 19:34:34,097 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:34:34,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:34:34,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:34:34,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:34:34,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:34:34,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:34:35,937 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-26 19:34:44,588 INFO L134 CoverageAnalysis]: Checked inductivity of 13119 backedges. 7051 proven. 2468 refuted. 0 times theorem prover too weak. 3600 trivial. 0 not checked. [2018-10-26 19:34:44,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:34:44,588 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-26 19:34:44,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:34:45,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:34:45,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:34:52,757 INFO L134 CoverageAnalysis]: Checked inductivity of 13119 backedges. 7977 proven. 0 refuted. 0 times theorem prover too weak. 5142 trivial. 0 not checked. [2018-10-26 19:34:52,779 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 19:34:52,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [18] total 20 [2018-10-26 19:34:52,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-26 19:34:52,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-26 19:34:52,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2018-10-26 19:34:52,783 INFO L87 Difference]: Start difference. First operand 20451 states and 20730 transitions. Second operand 20 states. Received shutdown request... [2018-10-26 19:35:06,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-26 19:35:06,139 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-26 19:35:06,146 WARN L205 ceAbstractionStarter]: Timeout [2018-10-26 19:35:06,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 07:35:06 BoogieIcfgContainer [2018-10-26 19:35:06,146 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 19:35:06,147 INFO L168 Benchmark]: Toolchain (without parser) took 226494.72 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 2.6 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-10-26 19:35:06,148 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-26 19:35:06,149 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1343.11 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 76.6 MB). Peak memory consumption was 76.6 MB. Max. memory is 7.1 GB. [2018-10-26 19:35:06,150 INFO L168 Benchmark]: Boogie Procedure Inliner took 331.82 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 701.0 MB). Free memory was 1.3 GB in the beginning and 2.1 GB in the end (delta: -804.4 MB). Peak memory consumption was 28.6 MB. Max. memory is 7.1 GB. [2018-10-26 19:35:06,151 INFO L168 Benchmark]: Boogie Preprocessor took 159.22 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. [2018-10-26 19:35:06,151 INFO L168 Benchmark]: RCFGBuilder took 7067.21 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 1.8 GB in the end (delta: 281.0 MB). Peak memory consumption was 281.0 MB. Max. memory is 7.1 GB. [2018-10-26 19:35:06,152 INFO L168 Benchmark]: TraceAbstraction took 217587.24 ms. Allocated memory was 2.2 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 1.8 GB in the beginning and 2.6 GB in the end (delta: -763.4 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-10-26 19:35:06,157 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1343.11 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 76.6 MB). Peak memory consumption was 76.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 331.82 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 701.0 MB). Free memory was 1.3 GB in the beginning and 2.1 GB in the end (delta: -804.4 MB). Peak memory consumption was 28.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 159.22 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 7067.21 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 1.8 GB in the end (delta: 281.0 MB). Peak memory consumption was 281.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 217587.24 ms. Allocated memory was 2.2 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 1.8 GB in the beginning and 2.6 GB in the end (delta: -763.4 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 55). Cancelled while BasicCegarLoop was constructing difference of abstraction (20451states) and FLOYD_HOARE automaton (currently 24 states, 20 states before enhancement),while ReachableStatesComputation was computing reachable states (7427 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 397 locations, 1 error locations. TIMEOUT Result, 217.5s OverallTime, 18 OverallIterations, 14 TraceHistogramMax, 119.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3214 SDtfs, 38026 SDslu, 2132 SDs, 0 SdLazy, 86704 SolverSat, 5619 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 97.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17643 GetRequests, 17448 SyntacticMatches, 28 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 11.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20781occurred 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: 2.5s AutomataMinimizationTime, 17 MinimizatonAttempts, 13171 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.1s SsaConstructionTime, 4.7s SatisfiabilityAnalysisTime, 49.8s InterpolantComputationTime, 39911 NumberOfCodeBlocks, 39911 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 39883 ConstructedInterpolants, 680 QuantifiedInterpolants, 284687917 SizeOfPredicates, 7 NumberOfNonLiveVariables, 19943 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 28 InterpolantComputations, 16 PerfectInterpolantSequences, 135603/142440 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown