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/Problem12_label24_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-26 21:17:51,545 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 21:17:51,549 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 21:17:51,562 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 21:17:51,562 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 21:17:51,563 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 21:17:51,564 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 21:17:51,567 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 21:17:51,568 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 21:17:51,569 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 21:17:51,570 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 21:17:51,570 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 21:17:51,571 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 21:17:51,572 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 21:17:51,574 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 21:17:51,574 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 21:17:51,575 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 21:17:51,577 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 21:17:51,579 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 21:17:51,581 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 21:17:51,582 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 21:17:51,584 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 21:17:51,586 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 21:17:51,590 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 21:17:51,590 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 21:17:51,591 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 21:17:51,592 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 21:17:51,593 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 21:17:51,600 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 21:17:51,601 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 21:17:51,601 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 21:17:51,602 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-26 21:17:51,608 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 21:17:51,641 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 21:17:51,642 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 21:17:51,642 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 21:17:51,643 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 21:17:51,643 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 21:17:51,643 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 21:17:51,644 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 21:17:51,645 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 21:17:51,645 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 21:17:51,645 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 21:17:51,645 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 21:17:51,646 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 21:17:51,646 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 21:17:51,646 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 21:17:51,647 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 21:17:51,647 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 21:17:51,647 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 21:17:51,647 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 21:17:51,647 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 21:17:51,649 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 21:17:51,649 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 21:17:51,649 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 21:17:51,649 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 21:17:51,650 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 21:17:51,650 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 21:17:51,650 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 21:17:51,650 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 21:17:51,650 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-26 21:17:51,722 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 21:17:51,738 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 21:17:51,741 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 21:17:51,743 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 21:17:51,743 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 21:17:51,744 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label24_true-unreach-call.c [2018-10-26 21:17:51,804 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/928a90e3d/22f40601d278490cacf5fb563119ce05/FLAGd8269afce [2018-10-26 21:17:52,607 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 21:17:52,608 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label24_true-unreach-call.c [2018-10-26 21:17:52,639 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/928a90e3d/22f40601d278490cacf5fb563119ce05/FLAGd8269afce [2018-10-26 21:17:52,656 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/928a90e3d/22f40601d278490cacf5fb563119ce05 [2018-10-26 21:17:52,670 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 21:17:52,672 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 21:17:52,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 21:17:52,673 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 21:17:52,678 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 21:17:52,679 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:17:52" (1/1) ... [2018-10-26 21:17:52,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1879af29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:17:52, skipping insertion in model container [2018-10-26 21:17:52,683 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:17:52" (1/1) ... [2018-10-26 21:17:52,695 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 21:17:52,843 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 21:17:54,024 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 21:17:54,030 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 21:17:54,624 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 21:17:54,658 INFO L193 MainTranslator]: Completed translation [2018-10-26 21:17:54,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:17:54 WrapperNode [2018-10-26 21:17:54,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 21:17:54,660 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 21:17:54,660 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 21:17:54,660 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 21:17:54,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:17:54" (1/1) ... [2018-10-26 21:17:54,745 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:17:54" (1/1) ... [2018-10-26 21:17:55,339 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 21:17:55,340 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 21:17:55,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 21:17:55,341 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 21:17:55,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:17:54" (1/1) ... [2018-10-26 21:17:55,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:17:54" (1/1) ... [2018-10-26 21:17:55,382 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:17:54" (1/1) ... [2018-10-26 21:17:55,383 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:17:54" (1/1) ... [2018-10-26 21:17:55,564 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:17:54" (1/1) ... [2018-10-26 21:17:55,616 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:17:54" (1/1) ... [2018-10-26 21:17:55,703 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:17:54" (1/1) ... [2018-10-26 21:17:55,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 21:17:55,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 21:17:55,794 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 21:17:55,794 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 21:17:55,795 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:17:54" (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 21:17:55,872 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-26 21:17:55,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 21:17:55,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 21:18:06,542 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 21:18:06,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:18:06 BoogieIcfgContainer [2018-10-26 21:18:06,543 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 21:18:06,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 21:18:06,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 21:18:06,549 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 21:18:06,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:17:52" (1/3) ... [2018-10-26 21:18:06,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a634187 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:18:06, skipping insertion in model container [2018-10-26 21:18:06,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:17:54" (2/3) ... [2018-10-26 21:18:06,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a634187 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:18:06, skipping insertion in model container [2018-10-26 21:18:06,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:18:06" (3/3) ... [2018-10-26 21:18:06,554 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label24_true-unreach-call.c [2018-10-26 21:18:06,564 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 21:18:06,581 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 21:18:06,596 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 21:18:06,651 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 21:18:06,652 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 21:18:06,652 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 21:18:06,653 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 21:18:06,653 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 21:18:06,653 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 21:18:06,653 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 21:18:06,653 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 21:18:06,653 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 21:18:06,691 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states. [2018-10-26 21:18:06,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-26 21:18:06,701 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:18:06,703 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:18:06,705 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:18:06,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:18:06,710 INFO L82 PathProgramCache]: Analyzing trace with hash 84973194, now seen corresponding path program 1 times [2018-10-26 21:18:06,712 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:18:06,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:18:06,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:18:06,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:18:06,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:18:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:18:07,153 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 21:18:07,156 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:18:07,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 21:18:07,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:18:07,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:18:07,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:18:07,182 INFO L87 Difference]: Start difference. First operand 819 states. Second operand 4 states. [2018-10-26 21:18:28,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:18:28,419 INFO L93 Difference]: Finished difference Result 3146 states and 6134 transitions. [2018-10-26 21:18:28,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:18:28,421 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2018-10-26 21:18:28,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:18:28,465 INFO L225 Difference]: With dead ends: 3146 [2018-10-26 21:18:28,465 INFO L226 Difference]: Without dead ends: 2320 [2018-10-26 21:18:28,474 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 21:18:28,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2018-10-26 21:18:28,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 2320. [2018-10-26 21:18:28,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2320 states. [2018-10-26 21:18:28,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 3858 transitions. [2018-10-26 21:18:28,635 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 3858 transitions. Word has length 47 [2018-10-26 21:18:28,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:18:28,635 INFO L481 AbstractCegarLoop]: Abstraction has 2320 states and 3858 transitions. [2018-10-26 21:18:28,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:18:28,638 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 3858 transitions. [2018-10-26 21:18:28,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-26 21:18:28,647 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:18:28,647 INFO L375 BasicCegarLoop]: trace histogram [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 21:18:28,647 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:18:28,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:18:28,648 INFO L82 PathProgramCache]: Analyzing trace with hash -936824486, now seen corresponding path program 1 times [2018-10-26 21:18:28,648 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:18:28,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:18:28,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:18:28,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:18:28,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:18:28,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:18:29,044 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:18:29,045 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:18:29,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 21:18:29,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:18:29,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:18:29,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:18:29,048 INFO L87 Difference]: Start difference. First operand 2320 states and 3858 transitions. Second operand 4 states. [2018-10-26 21:18:42,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:18:42,319 INFO L93 Difference]: Finished difference Result 9150 states and 15304 transitions. [2018-10-26 21:18:42,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:18:42,320 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 119 [2018-10-26 21:18:42,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:18:42,355 INFO L225 Difference]: With dead ends: 9150 [2018-10-26 21:18:42,355 INFO L226 Difference]: Without dead ends: 6832 [2018-10-26 21:18:42,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 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 21:18:42,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6832 states. [2018-10-26 21:18:42,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6832 to 6832. [2018-10-26 21:18:42,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6832 states. [2018-10-26 21:18:42,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6832 states to 6832 states and 9936 transitions. [2018-10-26 21:18:42,501 INFO L78 Accepts]: Start accepts. Automaton has 6832 states and 9936 transitions. Word has length 119 [2018-10-26 21:18:42,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:18:42,502 INFO L481 AbstractCegarLoop]: Abstraction has 6832 states and 9936 transitions. [2018-10-26 21:18:42,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:18:42,502 INFO L276 IsEmpty]: Start isEmpty. Operand 6832 states and 9936 transitions. [2018-10-26 21:18:42,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-26 21:18:42,508 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:18:42,509 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2018-10-26 21:18:42,509 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:18:42,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:18:42,509 INFO L82 PathProgramCache]: Analyzing trace with hash -320161239, now seen corresponding path program 1 times [2018-10-26 21:18:42,509 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:18:42,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:18:42,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:18:42,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:18:42,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:18:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:18:42,889 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-26 21:18:43,330 WARN L179 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2018-10-26 21:18:43,965 WARN L179 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2018-10-26 21:18:44,207 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:18:44,208 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:18:44,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-26 21:18:44,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 21:18:44,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 21:18:44,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-26 21:18:44,209 INFO L87 Difference]: Start difference. First operand 6832 states and 9936 transitions. Second operand 6 states. [2018-10-26 21:18:44,388 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-10-26 21:19:01,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:19:01,083 INFO L93 Difference]: Finished difference Result 21934 states and 31609 transitions. [2018-10-26 21:19:01,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 21:19:01,085 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2018-10-26 21:19:01,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:19:01,156 INFO L225 Difference]: With dead ends: 21934 [2018-10-26 21:19:01,157 INFO L226 Difference]: Without dead ends: 15104 [2018-10-26 21:19:01,168 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-10-26 21:19:01,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15104 states. [2018-10-26 21:19:01,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15104 to 15104. [2018-10-26 21:19:01,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15104 states. [2018-10-26 21:19:01,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15104 states to 15104 states and 21135 transitions. [2018-10-26 21:19:01,452 INFO L78 Accepts]: Start accepts. Automaton has 15104 states and 21135 transitions. Word has length 125 [2018-10-26 21:19:01,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:19:01,453 INFO L481 AbstractCegarLoop]: Abstraction has 15104 states and 21135 transitions. [2018-10-26 21:19:01,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 21:19:01,453 INFO L276 IsEmpty]: Start isEmpty. Operand 15104 states and 21135 transitions. [2018-10-26 21:19:01,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-26 21:19:01,460 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:19:01,460 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:19:01,460 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:19:01,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:19:01,462 INFO L82 PathProgramCache]: Analyzing trace with hash 257272057, now seen corresponding path program 1 times [2018-10-26 21:19:01,462 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:19:01,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:19:01,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:19:01,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:19:01,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:19:01,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:19:02,058 WARN L179 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 9 [2018-10-26 21:19:02,310 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2018-10-26 21:19:02,551 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 145 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-10-26 21:19:02,551 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:19:02,551 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 21:19:02,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:19:02,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:19:02,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:19:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:19:02,840 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 21:19:02,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2018-10-26 21:19:02,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 21:19:02,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 21:19:02,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-10-26 21:19:02,842 INFO L87 Difference]: Start difference. First operand 15104 states and 21135 transitions. Second operand 7 states. [2018-10-26 21:19:04,392 WARN L179 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2018-10-26 21:19:26,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:19:26,028 INFO L93 Difference]: Finished difference Result 79868 states and 112723 transitions. [2018-10-26 21:19:26,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-26 21:19:26,029 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 197 [2018-10-26 21:19:26,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:19:26,156 INFO L225 Difference]: With dead ends: 79868 [2018-10-26 21:19:26,156 INFO L226 Difference]: Without dead ends: 63259 [2018-10-26 21:19:26,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 198 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2018-10-26 21:19:26,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63259 states. [2018-10-26 21:19:26,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63259 to 40671. [2018-10-26 21:19:26,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40671 states. [2018-10-26 21:19:26,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40671 states to 40671 states and 48760 transitions. [2018-10-26 21:19:26,973 INFO L78 Accepts]: Start accepts. Automaton has 40671 states and 48760 transitions. Word has length 197 [2018-10-26 21:19:26,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:19:26,974 INFO L481 AbstractCegarLoop]: Abstraction has 40671 states and 48760 transitions. [2018-10-26 21:19:26,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-26 21:19:26,974 INFO L276 IsEmpty]: Start isEmpty. Operand 40671 states and 48760 transitions. [2018-10-26 21:19:26,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2018-10-26 21:19:26,987 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:19:26,988 INFO L375 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:19:26,988 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:19:26,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:19:26,989 INFO L82 PathProgramCache]: Analyzing trace with hash -2127600608, now seen corresponding path program 1 times [2018-10-26 21:19:26,989 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:19:26,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:19:26,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:19:26,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:19:26,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:19:27,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:19:27,477 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-26 21:19:27,962 WARN L179 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2018-10-26 21:19:28,525 WARN L179 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2018-10-26 21:19:29,034 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 236 proven. 8 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2018-10-26 21:19:29,035 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:19:29,035 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 21:19:29,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:19:29,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:19:29,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:19:29,281 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 312 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-10-26 21:19:29,302 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 21:19:29,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2018-10-26 21:19:29,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 21:19:29,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 21:19:29,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-26 21:19:29,304 INFO L87 Difference]: Start difference. First operand 40671 states and 48760 transitions. Second operand 7 states. [2018-10-26 21:19:42,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:19:42,718 INFO L93 Difference]: Finished difference Result 92621 states and 110572 transitions. [2018-10-26 21:19:42,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-26 21:19:42,718 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 368 [2018-10-26 21:19:42,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:19:42,881 INFO L225 Difference]: With dead ends: 92621 [2018-10-26 21:19:42,882 INFO L226 Difference]: Without dead ends: 51951 [2018-10-26 21:19:42,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 371 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2018-10-26 21:19:42,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51951 states. [2018-10-26 21:19:43,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51951 to 51951. [2018-10-26 21:19:43,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51951 states. [2018-10-26 21:19:43,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51951 states to 51951 states and 56873 transitions. [2018-10-26 21:19:43,589 INFO L78 Accepts]: Start accepts. Automaton has 51951 states and 56873 transitions. Word has length 368 [2018-10-26 21:19:43,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:19:43,590 INFO L481 AbstractCegarLoop]: Abstraction has 51951 states and 56873 transitions. [2018-10-26 21:19:43,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-26 21:19:43,590 INFO L276 IsEmpty]: Start isEmpty. Operand 51951 states and 56873 transitions. [2018-10-26 21:19:43,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2018-10-26 21:19:43,607 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:19:43,608 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 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 21:19:43,608 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:19:43,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:19:43,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1870176737, now seen corresponding path program 1 times [2018-10-26 21:19:43,608 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:19:43,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:19:43,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:19:43,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:19:43,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:19:43,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:19:44,500 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 331 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-10-26 21:19:44,501 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:19:44,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 21:19:44,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:19:44,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:19:44,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:19:44,503 INFO L87 Difference]: Start difference. First operand 51951 states and 56873 transitions. Second operand 4 states. [2018-10-26 21:19:52,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:19:52,657 INFO L93 Difference]: Finished difference Result 109916 states and 120731 transitions. [2018-10-26 21:19:52,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:19:52,658 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 406 [2018-10-26 21:19:52,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:19:52,753 INFO L225 Difference]: With dead ends: 109916 [2018-10-26 21:19:52,753 INFO L226 Difference]: Without dead ends: 58719 [2018-10-26 21:19:52,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 4 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 21:19:52,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58719 states. [2018-10-26 21:19:53,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58719 to 57967. [2018-10-26 21:19:53,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57967 states. [2018-10-26 21:19:53,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57967 states to 57967 states and 62925 transitions. [2018-10-26 21:19:53,447 INFO L78 Accepts]: Start accepts. Automaton has 57967 states and 62925 transitions. Word has length 406 [2018-10-26 21:19:53,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:19:53,448 INFO L481 AbstractCegarLoop]: Abstraction has 57967 states and 62925 transitions. [2018-10-26 21:19:53,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:19:53,449 INFO L276 IsEmpty]: Start isEmpty. Operand 57967 states and 62925 transitions. [2018-10-26 21:19:53,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2018-10-26 21:19:53,481 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:19:53,482 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:19:53,482 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:19:53,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:19:53,483 INFO L82 PathProgramCache]: Analyzing trace with hash -65666149, now seen corresponding path program 1 times [2018-10-26 21:19:53,483 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:19:53,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:19:53,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:19:53,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:19:53,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:19:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:19:53,944 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-10-26 21:19:54,377 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 465 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-10-26 21:19:54,378 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:19:54,378 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 21:19:54,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:19:54,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:19:54,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:19:54,379 INFO L87 Difference]: Start difference. First operand 57967 states and 62925 transitions. Second operand 4 states. [2018-10-26 21:20:02,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:20:02,293 INFO L93 Difference]: Finished difference Result 137740 states and 149642 transitions. [2018-10-26 21:20:02,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 21:20:02,293 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 481 [2018-10-26 21:20:02,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:20:02,375 INFO L225 Difference]: With dead ends: 137740 [2018-10-26 21:20:02,375 INFO L226 Difference]: Without dead ends: 80527 [2018-10-26 21:20:02,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 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 21:20:02,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80527 states. [2018-10-26 21:20:03,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80527 to 79023. [2018-10-26 21:20:03,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79023 states. [2018-10-26 21:20:03,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79023 states to 79023 states and 85399 transitions. [2018-10-26 21:20:03,147 INFO L78 Accepts]: Start accepts. Automaton has 79023 states and 85399 transitions. Word has length 481 [2018-10-26 21:20:03,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:20:03,147 INFO L481 AbstractCegarLoop]: Abstraction has 79023 states and 85399 transitions. [2018-10-26 21:20:03,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:20:03,147 INFO L276 IsEmpty]: Start isEmpty. Operand 79023 states and 85399 transitions. [2018-10-26 21:20:03,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2018-10-26 21:20:03,176 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:20:03,177 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:20:03,177 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:20:03,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:20:03,178 INFO L82 PathProgramCache]: Analyzing trace with hash -294675675, now seen corresponding path program 1 times [2018-10-26 21:20:03,178 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:20:03,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:20:03,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:20:03,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:20:03,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:20:03,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:20:03,970 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2018-10-26 21:20:03,971 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:20:03,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 21:20:03,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 21:20:03,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 21:20:03,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 21:20:03,973 INFO L87 Difference]: Start difference. First operand 79023 states and 85399 transitions. Second operand 5 states. [2018-10-26 21:20:17,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:20:17,477 INFO L93 Difference]: Finished difference Result 228772 states and 247688 transitions. [2018-10-26 21:20:17,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 21:20:17,477 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 485 [2018-10-26 21:20:17,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:20:17,678 INFO L225 Difference]: With dead ends: 228772 [2018-10-26 21:20:17,679 INFO L226 Difference]: Without dead ends: 150503 [2018-10-26 21:20:17,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 21:20:17,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150503 states. [2018-10-26 21:20:19,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150503 to 125687. [2018-10-26 21:20:19,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125687 states. [2018-10-26 21:20:19,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125687 states to 125687 states and 133649 transitions. [2018-10-26 21:20:19,484 INFO L78 Accepts]: Start accepts. Automaton has 125687 states and 133649 transitions. Word has length 485 [2018-10-26 21:20:19,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:20:19,485 INFO L481 AbstractCegarLoop]: Abstraction has 125687 states and 133649 transitions. [2018-10-26 21:20:19,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 21:20:19,485 INFO L276 IsEmpty]: Start isEmpty. Operand 125687 states and 133649 transitions. [2018-10-26 21:20:19,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1006 [2018-10-26 21:20:19,567 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:20:19,568 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:20:19,568 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:20:19,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:20:19,569 INFO L82 PathProgramCache]: Analyzing trace with hash -406535854, now seen corresponding path program 1 times [2018-10-26 21:20:19,569 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:20:19,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:20:19,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:20:19,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:20:19,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:20:19,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:20:20,932 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 512 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-10-26 21:20:20,933 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:20:20,933 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 21:20:20,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:20:20,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:20:20,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:20:20,934 INFO L87 Difference]: Start difference. First operand 125687 states and 133649 transitions. Second operand 4 states. [2018-10-26 21:20:29,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:20:29,010 INFO L93 Difference]: Finished difference Result 246097 states and 261970 transitions. [2018-10-26 21:20:29,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:20:29,010 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1005 [2018-10-26 21:20:29,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:20:29,127 INFO L225 Difference]: With dead ends: 246097 [2018-10-26 21:20:29,127 INFO L226 Difference]: Without dead ends: 104574 [2018-10-26 21:20:29,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 3 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 21:20:29,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104574 states. [2018-10-26 21:20:29,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104574 to 94798. [2018-10-26 21:20:29,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94798 states. [2018-10-26 21:20:29,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94798 states to 94798 states and 99342 transitions. [2018-10-26 21:20:29,976 INFO L78 Accepts]: Start accepts. Automaton has 94798 states and 99342 transitions. Word has length 1005 [2018-10-26 21:20:29,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:20:29,977 INFO L481 AbstractCegarLoop]: Abstraction has 94798 states and 99342 transitions. [2018-10-26 21:20:29,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:20:29,978 INFO L276 IsEmpty]: Start isEmpty. Operand 94798 states and 99342 transitions. [2018-10-26 21:20:30,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1035 [2018-10-26 21:20:30,042 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:20:30,045 INFO L375 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:20:30,045 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:20:30,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:20:30,045 INFO L82 PathProgramCache]: Analyzing trace with hash -68173860, now seen corresponding path program 1 times [2018-10-26 21:20:30,046 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:20:30,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:20:30,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:20:30,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:20:30,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:20:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:20:31,362 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 701 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2018-10-26 21:20:31,363 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:20:31,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 21:20:31,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 21:20:31,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 21:20:31,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 21:20:31,364 INFO L87 Difference]: Start difference. First operand 94798 states and 99342 transitions. Second operand 3 states. [2018-10-26 21:20:36,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:20:36,677 INFO L93 Difference]: Finished difference Result 238474 states and 250460 transitions. [2018-10-26 21:20:36,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 21:20:36,677 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1034 [2018-10-26 21:20:36,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:20:36,851 INFO L225 Difference]: With dead ends: 238474 [2018-10-26 21:20:36,851 INFO L226 Difference]: Without dead ends: 143677 [2018-10-26 21:20:36,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 21:20:37,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143677 states. [2018-10-26 21:20:38,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143677 to 132397. [2018-10-26 21:20:38,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132397 states. [2018-10-26 21:20:38,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132397 states to 132397 states and 137869 transitions. [2018-10-26 21:20:38,743 INFO L78 Accepts]: Start accepts. Automaton has 132397 states and 137869 transitions. Word has length 1034 [2018-10-26 21:20:38,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:20:38,743 INFO L481 AbstractCegarLoop]: Abstraction has 132397 states and 137869 transitions. [2018-10-26 21:20:38,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 21:20:38,744 INFO L276 IsEmpty]: Start isEmpty. Operand 132397 states and 137869 transitions. [2018-10-26 21:20:38,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1043 [2018-10-26 21:20:38,807 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:20:38,807 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:20:38,808 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:20:38,808 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:20:38,808 INFO L82 PathProgramCache]: Analyzing trace with hash -688117906, now seen corresponding path program 1 times [2018-10-26 21:20:38,808 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:20:38,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:20:38,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:20:38,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:20:38,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:20:38,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:20:40,571 INFO L134 CoverageAnalysis]: Checked inductivity of 849 backedges. 725 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2018-10-26 21:20:40,572 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:20:40,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 21:20:40,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:20:40,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:20:40,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:20:40,574 INFO L87 Difference]: Start difference. First operand 132397 states and 137869 transitions. Second operand 4 states. [2018-10-26 21:20:49,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:20:49,165 INFO L93 Difference]: Finished difference Result 296376 states and 308510 transitions. [2018-10-26 21:20:49,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:20:49,166 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1042 [2018-10-26 21:20:49,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:20:49,345 INFO L225 Difference]: With dead ends: 296376 [2018-10-26 21:20:49,345 INFO L226 Difference]: Without dead ends: 164733 [2018-10-26 21:20:49,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 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 21:20:49,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164733 states. [2018-10-26 21:20:51,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164733 to 148189. [2018-10-26 21:20:51,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148189 states. [2018-10-26 21:20:51,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148189 states to 148189 states and 153748 transitions. [2018-10-26 21:20:51,620 INFO L78 Accepts]: Start accepts. Automaton has 148189 states and 153748 transitions. Word has length 1042 [2018-10-26 21:20:51,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:20:51,621 INFO L481 AbstractCegarLoop]: Abstraction has 148189 states and 153748 transitions. [2018-10-26 21:20:51,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:20:51,621 INFO L276 IsEmpty]: Start isEmpty. Operand 148189 states and 153748 transitions. [2018-10-26 21:20:51,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1173 [2018-10-26 21:20:51,714 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:20:51,715 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:20:51,715 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:20:51,716 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:20:51,716 INFO L82 PathProgramCache]: Analyzing trace with hash -812773691, now seen corresponding path program 1 times [2018-10-26 21:20:51,716 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:20:51,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:20:51,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:20:51,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:20:51,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:20:51,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:20:52,639 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-26 21:20:52,937 WARN L179 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2018-10-26 21:20:58,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 679 proven. 45 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2018-10-26 21:20:58,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:20:58,092 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 21:20:58,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:20:58,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:20:58,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:20:58,909 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 16 [2018-10-26 21:21:00,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 679 proven. 45 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2018-10-26 21:21:00,383 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:21:00,383 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4] total 14 [2018-10-26 21:21:00,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-26 21:21:00,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-26 21:21:00,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2018-10-26 21:21:00,385 INFO L87 Difference]: Start difference. First operand 148189 states and 153748 transitions. Second operand 14 states. Received shutdown request... [2018-10-26 21:21:37,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-26 21:21:37,130 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-26 21:21:37,135 WARN L205 ceAbstractionStarter]: Timeout [2018-10-26 21:21:37,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 09:21:37 BoogieIcfgContainer [2018-10-26 21:21:37,136 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 21:21:37,137 INFO L168 Benchmark]: Toolchain (without parser) took 224466.37 ms. Allocated memory was 1.5 GB in the beginning and 3.7 GB in the end (delta: 2.1 GB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -716.0 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-10-26 21:21:37,138 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-26 21:21:37,139 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1986.21 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 200.8 MB). Peak memory consumption was 200.8 MB. Max. memory is 7.1 GB. [2018-10-26 21:21:37,139 INFO L168 Benchmark]: Boogie Procedure Inliner took 679.78 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 806.4 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 68.9 MB. Max. memory is 7.1 GB. [2018-10-26 21:21:37,141 INFO L168 Benchmark]: Boogie Preprocessor took 453.33 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 48.7 MB). Peak memory consumption was 48.7 MB. Max. memory is 7.1 GB. [2018-10-26 21:21:37,141 INFO L168 Benchmark]: RCFGBuilder took 10749.11 ms. Allocated memory was 2.3 GB in the beginning and 2.5 GB in the end (delta: 206.0 MB). Free memory was 2.2 GB in the beginning and 2.3 GB in the end (delta: -150.6 MB). Peak memory consumption was 622.0 MB. Max. memory is 7.1 GB. [2018-10-26 21:21:37,142 INFO L168 Benchmark]: TraceAbstraction took 210590.94 ms. Allocated memory was 2.5 GB in the beginning and 3.7 GB in the end (delta: 1.1 GB). Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 185.5 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-10-26 21:21:37,148 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1986.21 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 200.8 MB). Peak memory consumption was 200.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 679.78 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 806.4 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 68.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 453.33 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 48.7 MB). Peak memory consumption was 48.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 10749.11 ms. Allocated memory was 2.3 GB in the beginning and 2.5 GB in the end (delta: 206.0 MB). Free memory was 2.2 GB in the beginning and 2.3 GB in the end (delta: -150.6 MB). Peak memory consumption was 622.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 210590.94 ms. Allocated memory was 2.5 GB in the beginning and 3.7 GB in the end (delta: 1.1 GB). Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 185.5 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 150]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 150). Cancelled while BasicCegarLoop was constructing difference of abstraction (148189states) and FLOYD_HOARE automaton (currently 34 states, 14 states before enhancement),while ReachableStatesComputation was computing reachable states (199602 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 819 locations, 1 error locations. TIMEOUT Result, 210.4s OverallTime, 12 OverallIterations, 6 TraceHistogramMax, 178.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 7996 SDtfs, 38089 SDslu, 1504 SDs, 0 SdLazy, 82829 SolverSat, 13185 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 147.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1858 GetRequests, 1769 SyntacticMatches, 17 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 7.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=148189occurred in iteration=11, 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: 9.9s AutomataMinimizationTime, 11 MinimizatonAttempts, 87260 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 10.9s InterpolantComputationTime, 8218 NumberOfCodeBlocks, 8218 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 8203 ConstructedInterpolants, 47 QuantifiedInterpolants, 31759287 SizeOfPredicates, 2 NumberOfNonLiveVariables, 2137 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 15 InterpolantComputations, 11 PerfectInterpolantSequences, 7703/7806 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown