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/Problem18_label57_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 18:37:47,445 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 18:37:47,448 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 18:37:47,464 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 18:37:47,464 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 18:37:47,465 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 18:37:47,466 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 18:37:47,468 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 18:37:47,469 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 18:37:47,470 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 18:37:47,471 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 18:37:47,471 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 18:37:47,472 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 18:37:47,473 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 18:37:47,475 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 18:37:47,475 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 18:37:47,476 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 18:37:47,478 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 18:37:47,480 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 18:37:47,482 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 18:37:47,483 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 18:37:47,484 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 18:37:47,486 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-23 18:37:47,487 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-23 18:37:47,487 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-23 18:37:47,488 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-23 18:37:47,489 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-23 18:37:47,490 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-23 18:37:47,490 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-23 18:37:47,492 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-23 18:37:47,492 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-23 18:37:47,493 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-23 18:37:47,493 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-23 18:37:47,493 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-23 18:37:47,494 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-23 18:37:47,495 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-23 18:37:47,495 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 [2018-10-23 18:37:47,510 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 18:37:47,510 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 18:37:47,511 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 18:37:47,511 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 18:37:47,512 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 18:37:47,512 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 18:37:47,512 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 18:37:47,512 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 18:37:47,513 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 18:37:47,513 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 18:37:47,513 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 18:37:47,513 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 18:37:47,513 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 18:37:47,514 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 18:37:47,514 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 18:37:47,514 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 18:37:47,514 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 18:37:47,514 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 18:37:47,515 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 18:37:47,515 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 18:37:47,515 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 18:37:47,515 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 18:37:47,515 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 18:37:47,515 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 18:37:47,516 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 18:37:47,516 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 18:37:47,516 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 18:37:47,516 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 18:37:47,568 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 18:37:47,585 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 18:37:47,588 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 18:37:47,589 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 18:37:47,590 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 18:37:47,590 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label57_false-unreach-call.c [2018-10-23 18:37:47,647 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/64c75270a/e14b57462d9b4b3bb58b9e611dda9337/FLAGd218851c3 [2018-10-23 18:37:48,399 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 18:37:48,400 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label57_false-unreach-call.c [2018-10-23 18:37:48,430 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/64c75270a/e14b57462d9b4b3bb58b9e611dda9337/FLAGd218851c3 [2018-10-23 18:37:48,451 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/64c75270a/e14b57462d9b4b3bb58b9e611dda9337 [2018-10-23 18:37:48,463 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 18:37:48,465 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 18:37:48,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 18:37:48,466 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 18:37:48,471 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 18:37:48,472 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:37:48" (1/1) ... [2018-10-23 18:37:48,475 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65fbebad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:37:48, skipping insertion in model container [2018-10-23 18:37:48,475 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:37:48" (1/1) ... [2018-10-23 18:37:48,486 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 18:37:48,614 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 18:37:49,580 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 18:37:49,585 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 18:37:50,090 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 18:37:50,123 INFO L193 MainTranslator]: Completed translation [2018-10-23 18:37:50,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:37:50 WrapperNode [2018-10-23 18:37:50,124 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 18:37:50,126 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 18:37:50,126 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 18:37:50,126 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 18:37:50,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:37:50" (1/1) ... [2018-10-23 18:37:50,210 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:37:50" (1/1) ... [2018-10-23 18:37:50,673 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 18:37:50,673 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 18:37:50,674 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 18:37:50,674 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 18:37:50,685 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:37:50" (1/1) ... [2018-10-23 18:37:50,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:37:50" (1/1) ... [2018-10-23 18:37:50,709 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:37:50" (1/1) ... [2018-10-23 18:37:50,710 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:37:50" (1/1) ... [2018-10-23 18:37:50,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:37:50" (1/1) ... [2018-10-23 18:37:50,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:37:50" (1/1) ... [2018-10-23 18:37:50,875 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:37:50" (1/1) ... [2018-10-23 18:37:50,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 18:37:50,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 18:37:50,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 18:37:50,901 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 18:37:50,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:37:50" (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 [2018-10-23 18:37:50,972 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-23 18:37:50,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 18:37:50,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 18:38:00,406 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 18:38:00,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:38:00 BoogieIcfgContainer [2018-10-23 18:38:00,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 18:38:00,409 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 18:38:00,409 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 18:38:00,414 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 18:38:00,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:37:48" (1/3) ... [2018-10-23 18:38:00,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@772f1ea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:38:00, skipping insertion in model container [2018-10-23 18:38:00,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:37:50" (2/3) ... [2018-10-23 18:38:00,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@772f1ea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:38:00, skipping insertion in model container [2018-10-23 18:38:00,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:38:00" (3/3) ... [2018-10-23 18:38:00,421 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label57_false-unreach-call.c [2018-10-23 18:38:00,431 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 18:38:00,446 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 18:38:00,464 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 18:38:00,510 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 18:38:00,510 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 18:38:00,511 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 18:38:00,511 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 18:38:00,511 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 18:38:00,511 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 18:38:00,511 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 18:38:00,511 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 18:38:00,512 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 18:38:00,546 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states. [2018-10-23 18:38:00,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-23 18:38:00,554 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:38:00,555 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:38:00,557 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:38:00,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:38:00,564 INFO L82 PathProgramCache]: Analyzing trace with hash 384191218, now seen corresponding path program 1 times [2018-10-23 18:38:00,566 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:38:00,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:38:00,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:38:00,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:38:00,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:38:00,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:38:00,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:38:00,848 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:38:00,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 18:38:00,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:38:00,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:38:00,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:38:00,873 INFO L87 Difference]: Start difference. First operand 758 states. Second operand 4 states. [2018-10-23 18:38:11,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:38:11,581 INFO L93 Difference]: Finished difference Result 2902 states and 5650 transitions. [2018-10-23 18:38:11,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:38:11,584 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-10-23 18:38:11,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:38:11,632 INFO L225 Difference]: With dead ends: 2902 [2018-10-23 18:38:11,632 INFO L226 Difference]: Without dead ends: 2137 [2018-10-23 18:38:11,640 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 [2018-10-23 18:38:11,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2018-10-23 18:38:11,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 2137. [2018-10-23 18:38:11,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2137 states. [2018-10-23 18:38:11,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 3512 transitions. [2018-10-23 18:38:11,803 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 3512 transitions. Word has length 9 [2018-10-23 18:38:11,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:38:11,804 INFO L481 AbstractCegarLoop]: Abstraction has 2137 states and 3512 transitions. [2018-10-23 18:38:11,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:38:11,804 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 3512 transitions. [2018-10-23 18:38:11,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-23 18:38:11,807 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:38:11,808 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-23 18:38:11,808 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:38:11,808 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:38:11,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1279445259, now seen corresponding path program 1 times [2018-10-23 18:38:11,809 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:38:11,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:38:11,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:38:11,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:38:11,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:38:11,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:38:12,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:38:12,195 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:38:12,195 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 18:38:12,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:38:12,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:38:12,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:38:12,199 INFO L87 Difference]: Start difference. First operand 2137 states and 3512 transitions. Second operand 4 states. [2018-10-23 18:38:12,353 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-23 18:38:25,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:38:25,225 INFO L93 Difference]: Finished difference Result 7730 states and 12408 transitions. [2018-10-23 18:38:25,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 18:38:25,226 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2018-10-23 18:38:25,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:38:25,252 INFO L225 Difference]: With dead ends: 7730 [2018-10-23 18:38:25,252 INFO L226 Difference]: Without dead ends: 5595 [2018-10-23 18:38:25,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-23 18:38:25,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5595 states. [2018-10-23 18:38:25,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5595 to 5595. [2018-10-23 18:38:25,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5595 states. [2018-10-23 18:38:25,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5595 states to 5595 states and 8127 transitions. [2018-10-23 18:38:25,363 INFO L78 Accepts]: Start accepts. Automaton has 5595 states and 8127 transitions. Word has length 79 [2018-10-23 18:38:25,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:38:25,364 INFO L481 AbstractCegarLoop]: Abstraction has 5595 states and 8127 transitions. [2018-10-23 18:38:25,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:38:25,364 INFO L276 IsEmpty]: Start isEmpty. Operand 5595 states and 8127 transitions. [2018-10-23 18:38:25,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-23 18:38:25,373 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:38:25,373 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-23 18:38:25,374 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:38:25,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:38:25,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1405792587, now seen corresponding path program 1 times [2018-10-23 18:38:25,374 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:38:25,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:38:25,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:38:25,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:38:25,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:38:25,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:38:26,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:38:26,120 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:38:26,121 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:38:26,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 18:38:26,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 18:38:26,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-23 18:38:26,122 INFO L87 Difference]: Start difference. First operand 5595 states and 8127 transitions. Second operand 5 states. [2018-10-23 18:38:26,437 WARN L179 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2018-10-23 18:38:35,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:38:35,146 INFO L93 Difference]: Finished difference Result 15334 states and 22438 transitions. [2018-10-23 18:38:35,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 18:38:35,146 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2018-10-23 18:38:35,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:38:35,194 INFO L225 Difference]: With dead ends: 15334 [2018-10-23 18:38:35,194 INFO L226 Difference]: Without dead ends: 9741 [2018-10-23 18:38:35,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-23 18:38:35,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9741 states. [2018-10-23 18:38:35,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9741 to 9741. [2018-10-23 18:38:35,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9741 states. [2018-10-23 18:38:35,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9741 states to 9741 states and 12610 transitions. [2018-10-23 18:38:35,382 INFO L78 Accepts]: Start accepts. Automaton has 9741 states and 12610 transitions. Word has length 128 [2018-10-23 18:38:35,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:38:35,382 INFO L481 AbstractCegarLoop]: Abstraction has 9741 states and 12610 transitions. [2018-10-23 18:38:35,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 18:38:35,383 INFO L276 IsEmpty]: Start isEmpty. Operand 9741 states and 12610 transitions. [2018-10-23 18:38:35,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-10-23 18:38:35,388 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:38:35,388 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:38:35,389 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:38:35,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:38:35,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1876778072, now seen corresponding path program 1 times [2018-10-23 18:38:35,389 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:38:35,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:38:35,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:38:35,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:38:35,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:38:35,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:38:36,054 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 86 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:38:36,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:38:36,054 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 [2018-10-23 18:38:36,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:38:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:38:36,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:38:36,385 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:38:36,417 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:38:36,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2018-10-23 18:38:36,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 18:38:36,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 18:38:36,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-23 18:38:36,419 INFO L87 Difference]: Start difference. First operand 9741 states and 12610 transitions. Second operand 6 states. [2018-10-23 18:38:39,158 WARN L179 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2018-10-23 18:38:49,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:38:49,581 INFO L93 Difference]: Finished difference Result 34693 states and 47766 transitions. [2018-10-23 18:38:49,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 18:38:49,581 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 270 [2018-10-23 18:38:49,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:38:49,657 INFO L225 Difference]: With dead ends: 34693 [2018-10-23 18:38:49,658 INFO L226 Difference]: Without dead ends: 24261 [2018-10-23 18:38:49,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 270 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-10-23 18:38:49,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24261 states. [2018-10-23 18:38:50,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24261 to 17339. [2018-10-23 18:38:50,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17339 states. [2018-10-23 18:38:50,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17339 states to 17339 states and 19377 transitions. [2018-10-23 18:38:50,036 INFO L78 Accepts]: Start accepts. Automaton has 17339 states and 19377 transitions. Word has length 270 [2018-10-23 18:38:50,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:38:50,037 INFO L481 AbstractCegarLoop]: Abstraction has 17339 states and 19377 transitions. [2018-10-23 18:38:50,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 18:38:50,037 INFO L276 IsEmpty]: Start isEmpty. Operand 17339 states and 19377 transitions. [2018-10-23 18:38:50,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 899 [2018-10-23 18:38:50,075 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:38:50,076 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 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, 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] [2018-10-23 18:38:50,076 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:38:50,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:38:50,077 INFO L82 PathProgramCache]: Analyzing trace with hash -965734514, now seen corresponding path program 1 times [2018-10-23 18:38:50,077 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:38:50,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:38:50,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:38:50,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:38:50,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:38:50,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:38:51,332 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2018-10-23 18:38:51,332 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:38:51,333 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 18:38:51,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 18:38:51,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 18:38:51,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 18:38:51,335 INFO L87 Difference]: Start difference. First operand 17339 states and 19377 transitions. Second operand 3 states. [2018-10-23 18:38:55,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:38:55,936 INFO L93 Difference]: Finished difference Result 40204 states and 45234 transitions. [2018-10-23 18:38:55,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 18:38:55,945 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 898 [2018-10-23 18:38:55,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:38:55,981 INFO L225 Difference]: With dead ends: 40204 [2018-10-23 18:38:55,982 INFO L226 Difference]: Without dead ends: 22867 [2018-10-23 18:38:56,000 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 [2018-10-23 18:38:56,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22867 states. [2018-10-23 18:38:56,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22867 to 22176. [2018-10-23 18:38:56,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22176 states. [2018-10-23 18:38:56,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22176 states to 22176 states and 24954 transitions. [2018-10-23 18:38:56,290 INFO L78 Accepts]: Start accepts. Automaton has 22176 states and 24954 transitions. Word has length 898 [2018-10-23 18:38:56,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:38:56,291 INFO L481 AbstractCegarLoop]: Abstraction has 22176 states and 24954 transitions. [2018-10-23 18:38:56,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 18:38:56,292 INFO L276 IsEmpty]: Start isEmpty. Operand 22176 states and 24954 transitions. [2018-10-23 18:38:56,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 911 [2018-10-23 18:38:56,317 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:38:56,318 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 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, 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] [2018-10-23 18:38:56,318 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:38:56,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:38:56,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1985172884, now seen corresponding path program 1 times [2018-10-23 18:38:56,319 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:38:56,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:38:56,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:38:56,320 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:38:56,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:38:56,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:38:57,101 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 4 [2018-10-23 18:38:58,137 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 20 proven. 130 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2018-10-23 18:38:58,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:38:58,137 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 [2018-10-23 18:38:58,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:38:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:38:58,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:38:59,037 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2018-10-23 18:38:59,058 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:38:59,059 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2018-10-23 18:38:59,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 18:38:59,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 18:38:59,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 18:38:59,062 INFO L87 Difference]: Start difference. First operand 22176 states and 24954 transitions. Second operand 5 states. [2018-10-23 18:39:05,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:39:05,167 INFO L93 Difference]: Finished difference Result 62316 states and 72612 transitions. [2018-10-23 18:39:05,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:39:05,167 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 910 [2018-10-23 18:39:05,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:39:05,255 INFO L225 Difference]: With dead ends: 62316 [2018-10-23 18:39:05,255 INFO L226 Difference]: Without dead ends: 40142 [2018-10-23 18:39:05,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 913 GetRequests, 909 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 18:39:05,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40142 states. [2018-10-23 18:39:05,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40142 to 40142. [2018-10-23 18:39:05,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40142 states. [2018-10-23 18:39:05,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40142 states to 40142 states and 45148 transitions. [2018-10-23 18:39:05,795 INFO L78 Accepts]: Start accepts. Automaton has 40142 states and 45148 transitions. Word has length 910 [2018-10-23 18:39:05,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:39:05,797 INFO L481 AbstractCegarLoop]: Abstraction has 40142 states and 45148 transitions. [2018-10-23 18:39:05,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 18:39:05,797 INFO L276 IsEmpty]: Start isEmpty. Operand 40142 states and 45148 transitions. [2018-10-23 18:39:05,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 913 [2018-10-23 18:39:05,841 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:39:05,849 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 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, 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] [2018-10-23 18:39:05,850 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:39:05,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:39:05,851 INFO L82 PathProgramCache]: Analyzing trace with hash -407387247, now seen corresponding path program 1 times [2018-10-23 18:39:05,851 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:39:05,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:39:05,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:39:05,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:39:05,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:39:05,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:39:07,039 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2018-10-23 18:39:07,039 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:39:07,040 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 18:39:07,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 18:39:07,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 18:39:07,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 18:39:07,042 INFO L87 Difference]: Start difference. First operand 40142 states and 45148 transitions. Second operand 3 states. [2018-10-23 18:39:12,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:39:12,179 INFO L93 Difference]: Finished difference Result 89956 states and 101827 transitions. [2018-10-23 18:39:12,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 18:39:12,179 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 912 [2018-10-23 18:39:12,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:39:12,265 INFO L225 Difference]: With dead ends: 89956 [2018-10-23 18:39:12,266 INFO L226 Difference]: Without dead ends: 49816 [2018-10-23 18:39:12,304 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 [2018-10-23 18:39:12,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49816 states. [2018-10-23 18:39:12,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49816 to 49816. [2018-10-23 18:39:12,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49816 states. [2018-10-23 18:39:12,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49816 states to 49816 states and 55516 transitions. [2018-10-23 18:39:12,894 INFO L78 Accepts]: Start accepts. Automaton has 49816 states and 55516 transitions. Word has length 912 [2018-10-23 18:39:12,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:39:12,896 INFO L481 AbstractCegarLoop]: Abstraction has 49816 states and 55516 transitions. [2018-10-23 18:39:12,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 18:39:12,896 INFO L276 IsEmpty]: Start isEmpty. Operand 49816 states and 55516 transitions. [2018-10-23 18:39:12,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 934 [2018-10-23 18:39:12,908 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:39:12,909 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:39:12,909 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:39:12,910 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:39:12,910 INFO L82 PathProgramCache]: Analyzing trace with hash -488477036, now seen corresponding path program 1 times [2018-10-23 18:39:12,910 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:39:12,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:39:12,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:39:12,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:39:12,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:39:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:39:13,647 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-23 18:39:13,984 WARN L179 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 14 [2018-10-23 18:39:15,564 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 14 proven. 411 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-10-23 18:39:15,564 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:39:15,565 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 [2018-10-23 18:39:15,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:39:15,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:39:15,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:39:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 514 trivial. 0 not checked. [2018-10-23 18:39:16,301 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:39:16,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2018-10-23 18:39:16,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 18:39:16,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 18:39:16,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-10-23 18:39:16,303 INFO L87 Difference]: Start difference. First operand 49816 states and 55516 transitions. Second operand 9 states. [2018-10-23 18:39:35,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:39:35,603 INFO L93 Difference]: Finished difference Result 229126 states and 258809 transitions. [2018-10-23 18:39:35,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-23 18:39:35,603 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 933 [2018-10-23 18:39:35,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:39:35,859 INFO L225 Difference]: With dead ends: 229126 [2018-10-23 18:39:35,859 INFO L226 Difference]: Without dead ends: 179312 [2018-10-23 18:39:35,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 959 GetRequests, 942 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2018-10-23 18:39:36,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179312 states. [2018-10-23 18:39:37,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179312 to 74001. [2018-10-23 18:39:37,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74001 states. [2018-10-23 18:39:37,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74001 states to 74001 states and 81136 transitions. [2018-10-23 18:39:37,732 INFO L78 Accepts]: Start accepts. Automaton has 74001 states and 81136 transitions. Word has length 933 [2018-10-23 18:39:37,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:39:37,732 INFO L481 AbstractCegarLoop]: Abstraction has 74001 states and 81136 transitions. [2018-10-23 18:39:37,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-23 18:39:37,733 INFO L276 IsEmpty]: Start isEmpty. Operand 74001 states and 81136 transitions. [2018-10-23 18:39:37,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1136 [2018-10-23 18:39:37,750 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:39:37,751 INFO L375 BasicCegarLoop]: trace histogram [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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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] [2018-10-23 18:39:37,751 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:39:37,752 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:39:37,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1799357642, now seen corresponding path program 1 times [2018-10-23 18:39:37,752 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:39:37,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:39:37,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:39:37,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:39:37,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:39:37,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:39:38,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1385 backedges. 433 proven. 0 refuted. 0 times theorem prover too weak. 952 trivial. 0 not checked. [2018-10-23 18:39:38,879 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:39:38,879 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:39:38,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:39:38,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:39:38,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:39:38,880 INFO L87 Difference]: Start difference. First operand 74001 states and 81136 transitions. Second operand 4 states. [2018-10-23 18:39:44,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:39:44,951 INFO L93 Difference]: Finished difference Result 156292 states and 171875 transitions. [2018-10-23 18:39:44,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:39:44,952 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1135 [2018-10-23 18:39:44,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:39:45,031 INFO L225 Difference]: With dead ends: 156292 [2018-10-23 18:39:45,032 INFO L226 Difference]: Without dead ends: 76055 [2018-10-23 18:39:45,078 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 [2018-10-23 18:39:45,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76055 states. [2018-10-23 18:39:45,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76055 to 75364. [2018-10-23 18:39:45,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75364 states. [2018-10-23 18:39:45,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75364 states to 75364 states and 80118 transitions. [2018-10-23 18:39:45,748 INFO L78 Accepts]: Start accepts. Automaton has 75364 states and 80118 transitions. Word has length 1135 [2018-10-23 18:39:45,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:39:45,749 INFO L481 AbstractCegarLoop]: Abstraction has 75364 states and 80118 transitions. [2018-10-23 18:39:45,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:39:45,749 INFO L276 IsEmpty]: Start isEmpty. Operand 75364 states and 80118 transitions. [2018-10-23 18:39:45,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1191 [2018-10-23 18:39:45,772 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:39:45,773 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:39:45,774 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:39:45,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:39:45,774 INFO L82 PathProgramCache]: Analyzing trace with hash -336413025, now seen corresponding path program 1 times [2018-10-23 18:39:45,774 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:39:45,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:39:45,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:39:45,776 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:39:45,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:39:45,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:39:46,537 WARN L179 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-10-23 18:39:47,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 933 proven. 0 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2018-10-23 18:39:47,606 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:39:47,607 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:39:47,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:39:47,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:39:47,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:39:47,608 INFO L87 Difference]: Start difference. First operand 75364 states and 80118 transitions. Second operand 4 states. [2018-10-23 18:39:53,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:39:53,338 INFO L93 Difference]: Finished difference Result 152799 states and 162312 transitions. [2018-10-23 18:39:53,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:39:53,338 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1190 [2018-10-23 18:39:53,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:39:53,419 INFO L225 Difference]: With dead ends: 152799 [2018-10-23 18:39:53,419 INFO L226 Difference]: Without dead ends: 76054 [2018-10-23 18:39:53,457 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 [2018-10-23 18:39:53,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76054 states. [2018-10-23 18:39:53,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76054 to 74672. [2018-10-23 18:39:53,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74672 states. [2018-10-23 18:39:54,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74672 states to 74672 states and 78293 transitions. [2018-10-23 18:39:54,033 INFO L78 Accepts]: Start accepts. Automaton has 74672 states and 78293 transitions. Word has length 1190 [2018-10-23 18:39:54,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:39:54,034 INFO L481 AbstractCegarLoop]: Abstraction has 74672 states and 78293 transitions. [2018-10-23 18:39:54,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:39:54,034 INFO L276 IsEmpty]: Start isEmpty. Operand 74672 states and 78293 transitions. [2018-10-23 18:39:54,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1220 [2018-10-23 18:39:54,052 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:39:54,053 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:39:54,054 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:39:54,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:39:54,054 INFO L82 PathProgramCache]: Analyzing trace with hash 552987551, now seen corresponding path program 1 times [2018-10-23 18:39:54,054 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:39:54,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:39:54,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:39:54,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:39:54,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:39:54,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:39:58,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1656 backedges. 710 proven. 852 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2018-10-23 18:39:58,075 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:39:58,075 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 [2018-10-23 18:39:58,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:39:58,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:39:58,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:39:59,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1656 backedges. 853 proven. 0 refuted. 0 times theorem prover too weak. 803 trivial. 0 not checked. [2018-10-23 18:39:59,951 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:39:59,951 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2018-10-23 18:39:59,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-23 18:39:59,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-23 18:39:59,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2018-10-23 18:39:59,954 INFO L87 Difference]: Start difference. First operand 74672 states and 78293 transitions. Second operand 13 states. [2018-10-23 18:40:21,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:40:21,845 INFO L93 Difference]: Finished difference Result 177850 states and 186617 transitions. [2018-10-23 18:40:21,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-23 18:40:21,845 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 1219 [2018-10-23 18:40:21,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:40:21,963 INFO L225 Difference]: With dead ends: 177850 [2018-10-23 18:40:21,963 INFO L226 Difference]: Without dead ends: 103871 [2018-10-23 18:40:21,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1273 GetRequests, 1237 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=282, Invalid=978, Unknown=0, NotChecked=0, Total=1260 [2018-10-23 18:40:22,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103871 states. [2018-10-23 18:40:22,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103871 to 73981. [2018-10-23 18:40:22,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73981 states. [2018-10-23 18:40:22,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73981 states to 73981 states and 77271 transitions. [2018-10-23 18:40:22,651 INFO L78 Accepts]: Start accepts. Automaton has 73981 states and 77271 transitions. Word has length 1219 [2018-10-23 18:40:22,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:40:22,652 INFO L481 AbstractCegarLoop]: Abstraction has 73981 states and 77271 transitions. [2018-10-23 18:40:22,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-23 18:40:22,652 INFO L276 IsEmpty]: Start isEmpty. Operand 73981 states and 77271 transitions. [2018-10-23 18:40:22,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1239 [2018-10-23 18:40:22,667 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:40:22,668 INFO L375 BasicCegarLoop]: trace histogram [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, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:40:22,668 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:40:22,668 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:40:22,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1465835729, now seen corresponding path program 1 times [2018-10-23 18:40:22,669 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:40:22,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:40:22,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:40:22,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:40:22,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:40:22,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:40:23,635 WARN L179 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2018-10-23 18:40:24,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1907 backedges. 948 proven. 0 refuted. 0 times theorem prover too weak. 959 trivial. 0 not checked. [2018-10-23 18:40:24,698 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:40:24,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:40:24,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:40:24,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:40:24,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:40:24,699 INFO L87 Difference]: Start difference. First operand 73981 states and 77271 transitions. Second operand 4 states. [2018-10-23 18:40:29,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:40:29,336 INFO L93 Difference]: Finished difference Result 148651 states and 155233 transitions. [2018-10-23 18:40:29,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:40:29,337 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1238 [2018-10-23 18:40:29,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:40:29,407 INFO L225 Difference]: With dead ends: 148651 [2018-10-23 18:40:29,407 INFO L226 Difference]: Without dead ends: 75363 [2018-10-23 18:40:29,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:40:29,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75363 states. [2018-10-23 18:40:30,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75363 to 73981. [2018-10-23 18:40:30,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73981 states. [2018-10-23 18:40:30,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73981 states to 73981 states and 76973 transitions. [2018-10-23 18:40:30,341 INFO L78 Accepts]: Start accepts. Automaton has 73981 states and 76973 transitions. Word has length 1238 [2018-10-23 18:40:30,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:40:30,342 INFO L481 AbstractCegarLoop]: Abstraction has 73981 states and 76973 transitions. [2018-10-23 18:40:30,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:40:30,342 INFO L276 IsEmpty]: Start isEmpty. Operand 73981 states and 76973 transitions. [2018-10-23 18:40:30,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1294 [2018-10-23 18:40:30,362 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:40:30,363 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 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, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:40:30,363 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:40:30,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:40:30,363 INFO L82 PathProgramCache]: Analyzing trace with hash 85839490, now seen corresponding path program 1 times [2018-10-23 18:40:30,363 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:40:30,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:40:30,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:40:30,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:40:30,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:40:30,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:40:32,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1758 backedges. 983 proven. 0 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2018-10-23 18:40:32,418 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:40:32,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:40:32,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:40:32,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:40:32,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:40:32,419 INFO L87 Difference]: Start difference. First operand 73981 states and 76973 transitions. Second operand 4 states. [2018-10-23 18:40:37,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:40:37,075 INFO L93 Difference]: Finished difference Result 144497 states and 150445 transitions. [2018-10-23 18:40:37,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:40:37,076 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1293 [2018-10-23 18:40:37,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:40:37,152 INFO L225 Difference]: With dead ends: 144497 [2018-10-23 18:40:37,152 INFO L226 Difference]: Without dead ends: 71209 [2018-10-23 18:40:37,197 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 [2018-10-23 18:40:37,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71209 states. [2018-10-23 18:40:37,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71209 to 70518. [2018-10-23 18:40:37,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70518 states. [2018-10-23 18:40:37,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70518 states to 70518 states and 72953 transitions. [2018-10-23 18:40:37,811 INFO L78 Accepts]: Start accepts. Automaton has 70518 states and 72953 transitions. Word has length 1293 [2018-10-23 18:40:37,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:40:37,812 INFO L481 AbstractCegarLoop]: Abstraction has 70518 states and 72953 transitions. [2018-10-23 18:40:37,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:40:37,812 INFO L276 IsEmpty]: Start isEmpty. Operand 70518 states and 72953 transitions. [2018-10-23 18:40:37,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1369 [2018-10-23 18:40:37,841 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:40:37,842 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:40:37,842 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:40:37,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:40:37,843 INFO L82 PathProgramCache]: Analyzing trace with hash -543097555, now seen corresponding path program 1 times [2018-10-23 18:40:37,843 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:40:37,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:40:37,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:40:37,844 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:40:37,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:40:37,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:40:39,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2350 backedges. 1464 proven. 4 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2018-10-23 18:40:39,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:40:39,949 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 [2018-10-23 18:40:39,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:40:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:40:40,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:40:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2350 backedges. 1074 proven. 0 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2018-10-23 18:40:41,164 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:40:41,164 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-10-23 18:40:41,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 18:40:41,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 18:40:41,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-23 18:40:41,166 INFO L87 Difference]: Start difference. First operand 70518 states and 72953 transitions. Second operand 5 states. [2018-10-23 18:40:51,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:40:51,441 INFO L93 Difference]: Finished difference Result 165903 states and 172100 transitions. [2018-10-23 18:40:51,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 18:40:51,442 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1368 [2018-10-23 18:40:51,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:40:51,520 INFO L225 Difference]: With dead ends: 165903 [2018-10-23 18:40:51,520 INFO L226 Difference]: Without dead ends: 87078 [2018-10-23 18:40:51,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1380 GetRequests, 1371 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-23 18:40:51,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87078 states. [2018-10-23 18:40:52,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87078 to 85005. [2018-10-23 18:40:52,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85005 states. [2018-10-23 18:40:52,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85005 states to 85005 states and 86789 transitions. [2018-10-23 18:40:52,263 INFO L78 Accepts]: Start accepts. Automaton has 85005 states and 86789 transitions. Word has length 1368 [2018-10-23 18:40:52,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:40:52,263 INFO L481 AbstractCegarLoop]: Abstraction has 85005 states and 86789 transitions. [2018-10-23 18:40:52,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 18:40:52,264 INFO L276 IsEmpty]: Start isEmpty. Operand 85005 states and 86789 transitions. [2018-10-23 18:40:52,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1539 [2018-10-23 18:40:52,293 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:40:52,293 INFO L375 BasicCegarLoop]: trace histogram [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, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:40:52,294 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:40:52,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:40:52,294 INFO L82 PathProgramCache]: Analyzing trace with hash -834619835, now seen corresponding path program 1 times [2018-10-23 18:40:52,295 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:40:52,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:40:52,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:40:52,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:40:52,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:40:52,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:40:54,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2404 backedges. 1652 proven. 70 refuted. 0 times theorem prover too weak. 682 trivial. 0 not checked. [2018-10-23 18:40:54,552 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:40:54,552 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 [2018-10-23 18:40:54,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:40:54,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:40:54,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:40:56,089 WARN L179 SmtUtils]: Spent 881.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 22 [2018-10-23 18:40:57,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2404 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 2356 trivial. 0 not checked. [2018-10-23 18:40:57,065 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:40:57,066 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-10-23 18:40:57,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 18:40:57,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 18:40:57,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-23 18:40:57,068 INFO L87 Difference]: Start difference. First operand 85005 states and 86789 transitions. Second operand 5 states. [2018-10-23 18:41:24,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:41:24,169 INFO L93 Difference]: Finished difference Result 203869 states and 208211 transitions. [2018-10-23 18:41:24,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 18:41:24,170 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1538 [2018-10-23 18:41:24,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:41:24,284 INFO L225 Difference]: With dead ends: 203869 [2018-10-23 18:41:24,285 INFO L226 Difference]: Without dead ends: 119557 [2018-10-23 18:41:24,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1544 GetRequests, 1539 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-23 18:41:24,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119557 states. [2018-10-23 18:41:25,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119557 to 113337. [2018-10-23 18:41:25,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113337 states. [2018-10-23 18:41:25,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113337 states to 113337 states and 115232 transitions. [2018-10-23 18:41:25,332 INFO L78 Accepts]: Start accepts. Automaton has 113337 states and 115232 transitions. Word has length 1538 [2018-10-23 18:41:25,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:41:25,333 INFO L481 AbstractCegarLoop]: Abstraction has 113337 states and 115232 transitions. [2018-10-23 18:41:25,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 18:41:25,333 INFO L276 IsEmpty]: Start isEmpty. Operand 113337 states and 115232 transitions. [2018-10-23 18:41:25,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1814 [2018-10-23 18:41:25,394 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:41:25,395 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:41:25,395 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:41:25,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:41:25,396 INFO L82 PathProgramCache]: Analyzing trace with hash 485102502, now seen corresponding path program 1 times [2018-10-23 18:41:25,396 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:41:25,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:41:25,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:41:25,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:41:25,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:41:25,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:41:28,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3521 backedges. 2157 proven. 786 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2018-10-23 18:41:28,663 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:41:28,663 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 [2018-10-23 18:41:28,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:41:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:41:29,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:41:30,162 WARN L179 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 25 Received shutdown request... [2018-10-23 18:41:30,483 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-23 18:41:30,685 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 18:41:30,685 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 18:41:30,691 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 18:41:30,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:41:30 BoogieIcfgContainer [2018-10-23 18:41:30,692 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 18:41:30,692 INFO L168 Benchmark]: Toolchain (without parser) took 222228.61 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.4 GB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -865.1 MB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. [2018-10-23 18:41:30,694 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. [2018-10-23 18:41:30,694 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1659.18 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: 148.0 MB). Peak memory consumption was 148.0 MB. Max. memory is 7.1 GB. [2018-10-23 18:41:30,695 INFO L168 Benchmark]: Boogie Procedure Inliner took 547.20 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 770.2 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -930.7 MB). Peak memory consumption was 45.2 MB. Max. memory is 7.1 GB. [2018-10-23 18:41:30,696 INFO L168 Benchmark]: Boogie Preprocessor took 226.67 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: 29.7 MB). Peak memory consumption was 29.7 MB. Max. memory is 7.1 GB. [2018-10-23 18:41:30,697 INFO L168 Benchmark]: RCFGBuilder took 9507.29 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.6 GB in the end (delta: 525.4 MB). Peak memory consumption was 525.4 MB. Max. memory is 7.1 GB. [2018-10-23 18:41:30,697 INFO L168 Benchmark]: TraceAbstraction took 210282.34 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.6 GB). Free memory was 1.6 GB in the beginning and 2.3 GB in the end (delta: -637.3 MB). Peak memory consumption was 1.0 GB. Max. memory is 7.1 GB. [2018-10-23 18:41:30,703 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 1659.18 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: 148.0 MB). Peak memory consumption was 148.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 547.20 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 770.2 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -930.7 MB). Peak memory consumption was 45.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 226.67 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: 29.7 MB). Peak memory consumption was 29.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 9507.29 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.6 GB in the end (delta: 525.4 MB). Peak memory consumption was 525.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 210282.34 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.6 GB). Free memory was 1.6 GB in the beginning and 2.3 GB in the end (delta: -637.3 MB). Peak memory consumption was 1.0 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 33]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 33). Cancelled while BasicCegarLoop was analyzing trace of length 1814 with TraceHistMax 7,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 9 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 758 locations, 1 error locations. TIMEOUT Result, 210.1s OverallTime, 16 OverallIterations, 8 TraceHistogramMax, 163.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 7118 SDtfs, 48204 SDslu, 2131 SDs, 0 SdLazy, 90684 SolverSat, 15673 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 132.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6388 GetRequests, 6284 SyntacticMatches, 17 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 6.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=113337occurred in iteration=15, 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: 9.0s AutomataMinimizationTime, 15 MinimizatonAttempts, 155253 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 16.1s InterpolantComputationTime, 19358 NumberOfCodeBlocks, 19358 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 19337 ConstructedInterpolants, 7 QuantifiedInterpolants, 47072154 SizeOfPredicates, 2 NumberOfNonLiveVariables, 7242 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 21 InterpolantComputations, 15 PerfectInterpolantSequences, 21137/22608 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown