java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label41_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 16:14:32,638 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 16:14:32,640 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 16:14:32,653 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 16:14:32,653 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 16:14:32,654 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 16:14:32,656 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 16:14:32,658 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 16:14:32,659 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 16:14:32,660 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 16:14:32,661 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 16:14:32,661 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 16:14:32,662 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 16:14:32,663 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 16:14:32,664 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 16:14:32,665 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 16:14:32,666 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 16:14:32,668 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 16:14:32,670 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 16:14:32,671 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 16:14:32,672 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 16:14:32,673 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 16:14:32,676 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 16:14:32,676 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 16:14:32,676 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 16:14:32,677 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 16:14:32,678 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 16:14:32,679 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 16:14:32,680 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 16:14:32,681 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 16:14:32,681 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 16:14:32,682 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-24 16:14:32,685 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 [2018-10-24 16:14:32,713 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 16:14:32,713 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 16:14:32,714 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 16:14:32,714 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 16:14:32,715 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 16:14:32,716 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 16:14:32,716 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 16:14:32,716 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 16:14:32,716 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 16:14:32,716 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 16:14:32,717 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 16:14:32,717 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 16:14:32,717 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 16:14:32,717 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 16:14:32,717 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 16:14:32,718 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 16:14:32,718 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 16:14:32,718 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 16:14:32,718 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 16:14:32,718 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 16:14:32,719 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 16:14:32,719 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 16:14:32,719 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 16:14:32,719 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 16:14:32,719 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 16:14:32,720 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 16:14:32,721 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 16:14:32,721 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 16:14:32,780 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 16:14:32,794 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 16:14:32,797 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 16:14:32,799 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 16:14:32,799 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 16:14:32,800 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label41_true-unreach-call.c [2018-10-24 16:14:32,857 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/1159fdbf1/adfefce44868435aa53ac7b97b7a1449/FLAG9debaac1c [2018-10-24 16:14:33,539 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 16:14:33,540 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label41_true-unreach-call.c [2018-10-24 16:14:33,571 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/1159fdbf1/adfefce44868435aa53ac7b97b7a1449/FLAG9debaac1c [2018-10-24 16:14:33,593 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/1159fdbf1/adfefce44868435aa53ac7b97b7a1449 [2018-10-24 16:14:33,605 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 16:14:33,607 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 16:14:33,609 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 16:14:33,609 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 16:14:33,613 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 16:14:33,614 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:14:33" (1/1) ... [2018-10-24 16:14:33,617 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@570fd3ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:14:33, skipping insertion in model container [2018-10-24 16:14:33,618 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:14:33" (1/1) ... [2018-10-24 16:14:33,629 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 16:14:33,808 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 16:14:35,117 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:14:35,122 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 16:14:35,751 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:14:35,789 INFO L193 MainTranslator]: Completed translation [2018-10-24 16:14:35,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:14:35 WrapperNode [2018-10-24 16:14:35,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 16:14:35,791 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 16:14:35,795 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 16:14:35,796 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 16:14:35,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:14:35" (1/1) ... [2018-10-24 16:14:35,885 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:14:35" (1/1) ... [2018-10-24 16:14:36,444 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 16:14:36,444 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 16:14:36,445 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 16:14:36,445 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 16:14:36,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:14:35" (1/1) ... [2018-10-24 16:14:36,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:14:35" (1/1) ... [2018-10-24 16:14:36,490 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:14:35" (1/1) ... [2018-10-24 16:14:36,491 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:14:35" (1/1) ... [2018-10-24 16:14:36,602 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:14:35" (1/1) ... [2018-10-24 16:14:36,653 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:14:35" (1/1) ... [2018-10-24 16:14:36,693 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:14:35" (1/1) ... [2018-10-24 16:14:36,771 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 16:14:36,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 16:14:36,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 16:14:36,772 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 16:14:36,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:14:35" (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 [2018-10-24 16:14:36,843 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 16:14:36,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 16:14:36,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 16:14:45,700 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 16:14:45,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:14:45 BoogieIcfgContainer [2018-10-24 16:14:45,701 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 16:14:45,702 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 16:14:45,702 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 16:14:45,705 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 16:14:45,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 04:14:33" (1/3) ... [2018-10-24 16:14:45,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74fbb47f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:14:45, skipping insertion in model container [2018-10-24 16:14:45,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:14:35" (2/3) ... [2018-10-24 16:14:45,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74fbb47f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:14:45, skipping insertion in model container [2018-10-24 16:14:45,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:14:45" (3/3) ... [2018-10-24 16:14:45,709 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label41_true-unreach-call.c [2018-10-24 16:14:45,719 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 16:14:45,729 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 16:14:45,747 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 16:14:45,800 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 16:14:45,801 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 16:14:45,801 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 16:14:45,801 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 16:14:45,801 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 16:14:45,802 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 16:14:45,802 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 16:14:45,802 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 16:14:45,802 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 16:14:45,847 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states. [2018-10-24 16:14:45,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-24 16:14:45,863 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:14:45,864 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:14:45,866 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:14:45,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:14:45,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1884671582, now seen corresponding path program 1 times [2018-10-24 16:14:45,875 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:14:45,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:14:45,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:14:45,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:14:45,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:14:46,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:14:46,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:14:46,380 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:14:46,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:14:46,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:14:46,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:14:46,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:14:46,404 INFO L87 Difference]: Start difference. First operand 819 states. Second operand 4 states. [2018-10-24 16:15:00,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:15:00,311 INFO L93 Difference]: Finished difference Result 3162 states and 6150 transitions. [2018-10-24 16:15:00,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:15:00,314 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2018-10-24 16:15:00,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:15:00,351 INFO L225 Difference]: With dead ends: 3162 [2018-10-24 16:15:00,351 INFO L226 Difference]: Without dead ends: 2336 [2018-10-24 16:15:00,359 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 [2018-10-24 16:15:00,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2018-10-24 16:15:00,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 2336. [2018-10-24 16:15:00,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2336 states. [2018-10-24 16:15:00,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2336 states to 2336 states and 3769 transitions. [2018-10-24 16:15:00,517 INFO L78 Accepts]: Start accepts. Automaton has 2336 states and 3769 transitions. Word has length 53 [2018-10-24 16:15:00,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:15:00,518 INFO L481 AbstractCegarLoop]: Abstraction has 2336 states and 3769 transitions. [2018-10-24 16:15:00,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:15:00,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2336 states and 3769 transitions. [2018-10-24 16:15:00,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-24 16:15:00,531 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:15:00,531 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:15:00,532 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:15:00,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:15:00,532 INFO L82 PathProgramCache]: Analyzing trace with hash -455382204, now seen corresponding path program 1 times [2018-10-24 16:15:00,532 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:15:00,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:15:00,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:15:00,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:15:00,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:15:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:15:01,179 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2018-10-24 16:15:01,405 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:15:01,405 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:15:01,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 16:15:01,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 16:15:01,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 16:15:01,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-24 16:15:01,408 INFO L87 Difference]: Start difference. First operand 2336 states and 3769 transitions. Second operand 6 states. [2018-10-24 16:15:17,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:15:17,914 INFO L93 Difference]: Finished difference Result 9183 states and 14416 transitions. [2018-10-24 16:15:17,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:15:17,914 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 130 [2018-10-24 16:15:17,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:15:17,949 INFO L225 Difference]: With dead ends: 9183 [2018-10-24 16:15:17,949 INFO L226 Difference]: Without dead ends: 6849 [2018-10-24 16:15:17,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:15:17,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6849 states. [2018-10-24 16:15:18,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6849 to 6849. [2018-10-24 16:15:18,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6849 states. [2018-10-24 16:15:18,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6849 states to 6849 states and 9754 transitions. [2018-10-24 16:15:18,096 INFO L78 Accepts]: Start accepts. Automaton has 6849 states and 9754 transitions. Word has length 130 [2018-10-24 16:15:18,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:15:18,097 INFO L481 AbstractCegarLoop]: Abstraction has 6849 states and 9754 transitions. [2018-10-24 16:15:18,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 16:15:18,097 INFO L276 IsEmpty]: Start isEmpty. Operand 6849 states and 9754 transitions. [2018-10-24 16:15:18,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-10-24 16:15:18,108 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:15:18,108 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:15:18,109 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:15:18,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:15:18,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1535905281, now seen corresponding path program 1 times [2018-10-24 16:15:18,109 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:15:18,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:15:18,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:15:18,111 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:15:18,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:15:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:15:18,626 WARN L179 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 9 [2018-10-24 16:15:18,940 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 151 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-10-24 16:15:18,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:15:18,940 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 [2018-10-24 16:15:18,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:15:19,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:15:19,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:15:19,230 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:15:19,263 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:15:19,263 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2018-10-24 16:15:19,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 16:15:19,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 16:15:19,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:15:19,269 INFO L87 Difference]: Start difference. First operand 6849 states and 9754 transitions. Second operand 7 states. [2018-10-24 16:15:38,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:15:38,475 INFO L93 Difference]: Finished difference Result 28768 states and 40519 transitions. [2018-10-24 16:15:38,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 16:15:38,479 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 232 [2018-10-24 16:15:38,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:15:38,575 INFO L225 Difference]: With dead ends: 28768 [2018-10-24 16:15:38,575 INFO L226 Difference]: Without dead ends: 18909 [2018-10-24 16:15:38,596 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 233 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2018-10-24 16:15:38,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18909 states. [2018-10-24 16:15:39,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18909 to 14367. [2018-10-24 16:15:39,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14367 states. [2018-10-24 16:15:39,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14367 states to 14367 states and 17896 transitions. [2018-10-24 16:15:39,224 INFO L78 Accepts]: Start accepts. Automaton has 14367 states and 17896 transitions. Word has length 232 [2018-10-24 16:15:39,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:15:39,228 INFO L481 AbstractCegarLoop]: Abstraction has 14367 states and 17896 transitions. [2018-10-24 16:15:39,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 16:15:39,228 INFO L276 IsEmpty]: Start isEmpty. Operand 14367 states and 17896 transitions. [2018-10-24 16:15:39,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2018-10-24 16:15:39,238 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:15:39,238 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:15:39,239 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:15:39,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:15:39,239 INFO L82 PathProgramCache]: Analyzing trace with hash 603282787, now seen corresponding path program 1 times [2018-10-24 16:15:39,239 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:15:39,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:15:39,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:15:39,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:15:39,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:15:39,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:15:39,647 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:15:39,648 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:15:39,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:15:39,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:15:39,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:15:39,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:15:39,650 INFO L87 Difference]: Start difference. First operand 14367 states and 17896 transitions. Second operand 4 states. [2018-10-24 16:15:47,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:15:47,320 INFO L93 Difference]: Finished difference Result 49788 states and 63216 transitions. [2018-10-24 16:15:47,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:15:47,320 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 287 [2018-10-24 16:15:47,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:15:47,399 INFO L225 Difference]: With dead ends: 49788 [2018-10-24 16:15:47,399 INFO L226 Difference]: Without dead ends: 35423 [2018-10-24 16:15:47,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:15:47,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35423 states. [2018-10-24 16:15:47,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35423 to 35423. [2018-10-24 16:15:47,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35423 states. [2018-10-24 16:15:47,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35423 states to 35423 states and 43956 transitions. [2018-10-24 16:15:47,980 INFO L78 Accepts]: Start accepts. Automaton has 35423 states and 43956 transitions. Word has length 287 [2018-10-24 16:15:47,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:15:47,981 INFO L481 AbstractCegarLoop]: Abstraction has 35423 states and 43956 transitions. [2018-10-24 16:15:47,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:15:47,981 INFO L276 IsEmpty]: Start isEmpty. Operand 35423 states and 43956 transitions. [2018-10-24 16:15:47,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-10-24 16:15:47,989 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:15:47,989 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:15:47,989 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:15:47,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:15:47,990 INFO L82 PathProgramCache]: Analyzing trace with hash -673880654, now seen corresponding path program 1 times [2018-10-24 16:15:47,990 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:15:47,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:15:47,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:15:47,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:15:47,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:15:48,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:15:48,857 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 101 proven. 7 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-10-24 16:15:48,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:15:48,858 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) [2018-10-24 16:15:48,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:15:48,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:15:48,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:15:49,115 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-10-24 16:15:49,146 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:15:49,146 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2018-10-24 16:15:49,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:15:49,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:15:49,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:15:49,151 INFO L87 Difference]: Start difference. First operand 35423 states and 43956 transitions. Second operand 5 states. [2018-10-24 16:16:00,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:16:00,453 INFO L93 Difference]: Finished difference Result 140028 states and 174957 transitions. [2018-10-24 16:16:00,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:16:00,454 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 293 [2018-10-24 16:16:00,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:16:00,565 INFO L225 Difference]: With dead ends: 140028 [2018-10-24 16:16:00,565 INFO L226 Difference]: Without dead ends: 87268 [2018-10-24 16:16:00,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:16:00,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87268 states. [2018-10-24 16:16:01,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87268 to 78237. [2018-10-24 16:16:01,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78237 states. [2018-10-24 16:16:01,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78237 states to 78237 states and 88129 transitions. [2018-10-24 16:16:01,595 INFO L78 Accepts]: Start accepts. Automaton has 78237 states and 88129 transitions. Word has length 293 [2018-10-24 16:16:01,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:16:01,596 INFO L481 AbstractCegarLoop]: Abstraction has 78237 states and 88129 transitions. [2018-10-24 16:16:01,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:16:01,596 INFO L276 IsEmpty]: Start isEmpty. Operand 78237 states and 88129 transitions. [2018-10-24 16:16:01,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2018-10-24 16:16:01,604 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:16:01,605 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:16:01,605 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:16:01,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:16:01,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1940907995, now seen corresponding path program 1 times [2018-10-24 16:16:01,606 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:16:01,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:16:01,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:16:01,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:16:01,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:16:01,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:16:01,964 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2018-10-24 16:16:01,964 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:16:01,964 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:16:01,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:16:01,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:16:01,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:16:01,965 INFO L87 Difference]: Start difference. First operand 78237 states and 88129 transitions. Second operand 4 states. [2018-10-24 16:16:12,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:16:12,350 INFO L93 Difference]: Finished difference Result 160232 states and 180145 transitions. [2018-10-24 16:16:12,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:16:12,350 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2018-10-24 16:16:12,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:16:13,057 INFO L225 Difference]: With dead ends: 160232 [2018-10-24 16:16:13,057 INFO L226 Difference]: Without dead ends: 81997 [2018-10-24 16:16:13,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:16:13,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81997 states. [2018-10-24 16:16:13,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81997 to 79741. [2018-10-24 16:16:13,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79741 states. [2018-10-24 16:16:13,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79741 states to 79741 states and 88520 transitions. [2018-10-24 16:16:13,902 INFO L78 Accepts]: Start accepts. Automaton has 79741 states and 88520 transitions. Word has length 332 [2018-10-24 16:16:13,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:16:13,903 INFO L481 AbstractCegarLoop]: Abstraction has 79741 states and 88520 transitions. [2018-10-24 16:16:13,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:16:13,903 INFO L276 IsEmpty]: Start isEmpty. Operand 79741 states and 88520 transitions. [2018-10-24 16:16:13,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2018-10-24 16:16:13,931 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:16:13,931 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:16:13,932 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:16:13,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:16:13,932 INFO L82 PathProgramCache]: Analyzing trace with hash -124946050, now seen corresponding path program 1 times [2018-10-24 16:16:13,932 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:16:13,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:16:13,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:16:13,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:16:13,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:16:13,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:16:14,492 WARN L179 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-10-24 16:16:14,588 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 405 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-10-24 16:16:14,589 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:16:14,589 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:16:14,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:16:14,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:16:14,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:16:14,591 INFO L87 Difference]: Start difference. First operand 79741 states and 88520 transitions. Second operand 4 states. [2018-10-24 16:16:20,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:16:20,828 INFO L93 Difference]: Finished difference Result 161736 states and 179377 transitions. [2018-10-24 16:16:20,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:16:20,829 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 474 [2018-10-24 16:16:20,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:16:20,921 INFO L225 Difference]: With dead ends: 161736 [2018-10-24 16:16:20,921 INFO L226 Difference]: Without dead ends: 81997 [2018-10-24 16:16:20,977 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 [2018-10-24 16:16:21,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81997 states. [2018-10-24 16:16:22,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81997 to 80493. [2018-10-24 16:16:22,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80493 states. [2018-10-24 16:16:22,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80493 states to 80493 states and 88286 transitions. [2018-10-24 16:16:22,468 INFO L78 Accepts]: Start accepts. Automaton has 80493 states and 88286 transitions. Word has length 474 [2018-10-24 16:16:22,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:16:22,468 INFO L481 AbstractCegarLoop]: Abstraction has 80493 states and 88286 transitions. [2018-10-24 16:16:22,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:16:22,469 INFO L276 IsEmpty]: Start isEmpty. Operand 80493 states and 88286 transitions. [2018-10-24 16:16:22,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2018-10-24 16:16:22,486 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:16:22,487 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:16:22,487 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:16:22,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:16:22,487 INFO L82 PathProgramCache]: Analyzing trace with hash 370586703, now seen corresponding path program 1 times [2018-10-24 16:16:22,487 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:16:22,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:16:22,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:16:22,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:16:22,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:16:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:16:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 383 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-24 16:16:22,914 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:16:22,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:16:22,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:16:22,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:16:22,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:16:22,915 INFO L87 Difference]: Start difference. First operand 80493 states and 88286 transitions. Second operand 3 states. [2018-10-24 16:16:27,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:16:27,744 INFO L93 Difference]: Finished difference Result 178280 states and 195690 transitions. [2018-10-24 16:16:27,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:16:27,744 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 480 [2018-10-24 16:16:27,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:16:27,853 INFO L225 Difference]: With dead ends: 178280 [2018-10-24 16:16:27,853 INFO L226 Difference]: Without dead ends: 97789 [2018-10-24 16:16:27,903 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 [2018-10-24 16:16:27,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97789 states. [2018-10-24 16:16:28,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97789 to 95533. [2018-10-24 16:16:28,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95533 states. [2018-10-24 16:16:28,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95533 states to 95533 states and 104018 transitions. [2018-10-24 16:16:28,738 INFO L78 Accepts]: Start accepts. Automaton has 95533 states and 104018 transitions. Word has length 480 [2018-10-24 16:16:28,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:16:28,739 INFO L481 AbstractCegarLoop]: Abstraction has 95533 states and 104018 transitions. [2018-10-24 16:16:28,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:16:28,739 INFO L276 IsEmpty]: Start isEmpty. Operand 95533 states and 104018 transitions. [2018-10-24 16:16:28,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2018-10-24 16:16:28,761 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:16:28,761 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:16:28,761 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:16:28,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:16:28,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1189729698, now seen corresponding path program 1 times [2018-10-24 16:16:28,762 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:16:28,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:16:28,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:16:28,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:16:28,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:16:29,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:16:30,092 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-24 16:16:30,445 WARN L179 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2018-10-24 16:16:30,640 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 16 [2018-10-24 16:16:31,031 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 156 proven. 12 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2018-10-24 16:16:31,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:16:31,032 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 [2018-10-24 16:16:31,039 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:16:31,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:16:31,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:16:31,451 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2018-10-24 16:16:31,472 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:16:31,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2018-10-24 16:16:31,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 16:16:31,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 16:16:31,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-10-24 16:16:31,474 INFO L87 Difference]: Start difference. First operand 95533 states and 104018 transitions. Second operand 8 states. [2018-10-24 16:16:44,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:16:44,700 INFO L93 Difference]: Finished difference Result 226408 states and 245790 transitions. [2018-10-24 16:16:44,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 16:16:44,701 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 582 [2018-10-24 16:16:44,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:16:44,862 INFO L225 Difference]: With dead ends: 226408 [2018-10-24 16:16:44,862 INFO L226 Difference]: Without dead ends: 130877 [2018-10-24 16:16:44,919 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 582 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2018-10-24 16:16:45,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130877 states. [2018-10-24 16:16:45,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130877 to 126364. [2018-10-24 16:16:45,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126364 states. [2018-10-24 16:16:46,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126364 states to 126364 states and 134868 transitions. [2018-10-24 16:16:46,995 INFO L78 Accepts]: Start accepts. Automaton has 126364 states and 134868 transitions. Word has length 582 [2018-10-24 16:16:46,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:16:46,995 INFO L481 AbstractCegarLoop]: Abstraction has 126364 states and 134868 transitions. [2018-10-24 16:16:46,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 16:16:46,996 INFO L276 IsEmpty]: Start isEmpty. Operand 126364 states and 134868 transitions. [2018-10-24 16:16:47,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 589 [2018-10-24 16:16:47,015 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:16:47,016 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:16:47,016 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:16:47,016 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:16:47,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1462200261, now seen corresponding path program 1 times [2018-10-24 16:16:47,017 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:16:47,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:16:47,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:16:47,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:16:47,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:16:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:16:47,550 WARN L179 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2018-10-24 16:16:47,773 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 650 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2018-10-24 16:16:47,773 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:16:47,773 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 16:16:47,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 16:16:47,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 16:16:47,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-24 16:16:47,774 INFO L87 Difference]: Start difference. First operand 126364 states and 134868 transitions. Second operand 6 states. [2018-10-24 16:16:57,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:16:57,467 INFO L93 Difference]: Finished difference Result 270742 states and 289402 transitions. [2018-10-24 16:16:57,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:16:57,468 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 588 [2018-10-24 16:16:57,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:16:57,644 INFO L225 Difference]: With dead ends: 270742 [2018-10-24 16:16:57,645 INFO L226 Difference]: Without dead ends: 144380 [2018-10-24 16:16:57,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-24 16:16:57,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144380 states. [2018-10-24 16:17:00,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144380 to 140652. [2018-10-24 16:17:00,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140652 states. [2018-10-24 16:17:00,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140652 states to 140652 states and 148217 transitions. [2018-10-24 16:17:00,270 INFO L78 Accepts]: Start accepts. Automaton has 140652 states and 148217 transitions. Word has length 588 [2018-10-24 16:17:00,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:17:00,271 INFO L481 AbstractCegarLoop]: Abstraction has 140652 states and 148217 transitions. [2018-10-24 16:17:00,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 16:17:00,271 INFO L276 IsEmpty]: Start isEmpty. Operand 140652 states and 148217 transitions. [2018-10-24 16:17:00,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 593 [2018-10-24 16:17:00,293 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:17:00,294 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:17:00,294 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:17:00,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:17:00,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1747693829, now seen corresponding path program 1 times [2018-10-24 16:17:00,295 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:17:00,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:17:00,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:17:00,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:17:00,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:17:00,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:17:01,987 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 654 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2018-10-24 16:17:01,988 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:17:01,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:17:01,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:17:01,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:17:01,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:17:01,989 INFO L87 Difference]: Start difference. First operand 140652 states and 148217 transitions. Second operand 4 states. [2018-10-24 16:17:09,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:17:09,083 INFO L93 Difference]: Finished difference Result 282054 states and 297172 transitions. [2018-10-24 16:17:09,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:17:09,084 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 592 [2018-10-24 16:17:09,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:17:09,229 INFO L225 Difference]: With dead ends: 282054 [2018-10-24 16:17:09,229 INFO L226 Difference]: Without dead ends: 138394 [2018-10-24 16:17:09,311 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:17:09,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138394 states. [2018-10-24 16:17:11,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138394 to 133882. [2018-10-24 16:17:11,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133882 states. [2018-10-24 16:17:11,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133882 states to 133882 states and 138683 transitions. [2018-10-24 16:17:11,661 INFO L78 Accepts]: Start accepts. Automaton has 133882 states and 138683 transitions. Word has length 592 [2018-10-24 16:17:11,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:17:11,661 INFO L481 AbstractCegarLoop]: Abstraction has 133882 states and 138683 transitions. [2018-10-24 16:17:11,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:17:11,661 INFO L276 IsEmpty]: Start isEmpty. Operand 133882 states and 138683 transitions. [2018-10-24 16:17:11,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 604 [2018-10-24 16:17:11,672 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:17:11,673 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:17:11,673 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:17:11,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:17:11,673 INFO L82 PathProgramCache]: Analyzing trace with hash -665011732, now seen corresponding path program 1 times [2018-10-24 16:17:11,674 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:17:11,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:17:11,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:17:11,675 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:17:11,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:17:11,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:17:15,753 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 557 proven. 0 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2018-10-24 16:17:15,754 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:17:15,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:17:15,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:17:15,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:17:15,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:17:15,755 INFO L87 Difference]: Start difference. First operand 133882 states and 138683 transitions. Second operand 4 states. [2018-10-24 16:17:22,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:17:22,963 INFO L93 Difference]: Finished difference Result 267010 states and 276607 transitions. [2018-10-24 16:17:22,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:17:22,964 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 603 [2018-10-24 16:17:22,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:17:23,120 INFO L225 Difference]: With dead ends: 267010 [2018-10-24 16:17:23,120 INFO L226 Difference]: Without dead ends: 133882 [2018-10-24 16:17:23,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:17:23,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133882 states. [2018-10-24 16:17:24,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133882 to 127114. [2018-10-24 16:17:24,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127114 states. [2018-10-24 16:17:24,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127114 states to 127114 states and 130731 transitions. [2018-10-24 16:17:24,291 INFO L78 Accepts]: Start accepts. Automaton has 127114 states and 130731 transitions. Word has length 603 [2018-10-24 16:17:24,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:17:24,291 INFO L481 AbstractCegarLoop]: Abstraction has 127114 states and 130731 transitions. [2018-10-24 16:17:24,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:17:24,292 INFO L276 IsEmpty]: Start isEmpty. Operand 127114 states and 130731 transitions. [2018-10-24 16:17:24,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 635 [2018-10-24 16:17:24,303 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:17:24,304 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:17:24,304 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:17:24,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:17:24,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1504455587, now seen corresponding path program 1 times [2018-10-24 16:17:24,305 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:17:24,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:17:24,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:17:24,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:17:24,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:17:24,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:17:25,425 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2018-10-24 16:17:25,425 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:17:25,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:17:25,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:17:25,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:17:25,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:17:25,427 INFO L87 Difference]: Start difference. First operand 127114 states and 130731 transitions. Second operand 5 states. [2018-10-24 16:17:35,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:17:35,202 INFO L93 Difference]: Finished difference Result 365546 states and 376003 transitions. [2018-10-24 16:17:35,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:17:35,202 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 634 [2018-10-24 16:17:35,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:17:35,462 INFO L225 Difference]: With dead ends: 365546 [2018-10-24 16:17:35,463 INFO L226 Difference]: Without dead ends: 239186 [2018-10-24 16:17:35,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:17:35,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239186 states. [2018-10-24 16:17:37,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239186 to 179776. [2018-10-24 16:17:37,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179776 states. [2018-10-24 16:17:37,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179776 states to 179776 states and 184327 transitions. [2018-10-24 16:17:37,846 INFO L78 Accepts]: Start accepts. Automaton has 179776 states and 184327 transitions. Word has length 634 [2018-10-24 16:17:37,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:17:37,846 INFO L481 AbstractCegarLoop]: Abstraction has 179776 states and 184327 transitions. [2018-10-24 16:17:37,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:17:37,846 INFO L276 IsEmpty]: Start isEmpty. Operand 179776 states and 184327 transitions. [2018-10-24 16:17:37,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 658 [2018-10-24 16:17:37,863 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:17:37,864 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:17:37,864 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:17:37,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:17:37,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1685967853, now seen corresponding path program 1 times [2018-10-24 16:17:37,865 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:17:37,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:17:37,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:17:37,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:17:37,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:17:37,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:17:39,019 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 203 proven. 0 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2018-10-24 16:17:39,019 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:17:39,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:17:39,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:17:39,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:17:39,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:17:39,021 INFO L87 Difference]: Start difference. First operand 179776 states and 184327 transitions. Second operand 4 states. [2018-10-24 16:17:45,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:17:45,381 INFO L93 Difference]: Finished difference Result 342977 states and 351972 transitions. [2018-10-24 16:17:45,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:17:45,382 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 657 [2018-10-24 16:17:45,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:17:46,291 INFO L225 Difference]: With dead ends: 342977 [2018-10-24 16:17:46,291 INFO L226 Difference]: Without dead ends: 163955 [2018-10-24 16:17:46,340 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 [2018-10-24 16:17:46,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163955 states. [2018-10-24 16:17:47,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163955 to 144403. [2018-10-24 16:17:47,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144403 states. [2018-10-24 16:17:47,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144403 states to 144403 states and 147207 transitions. [2018-10-24 16:17:47,747 INFO L78 Accepts]: Start accepts. Automaton has 144403 states and 147207 transitions. Word has length 657 [2018-10-24 16:17:47,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:17:47,747 INFO L481 AbstractCegarLoop]: Abstraction has 144403 states and 147207 transitions. [2018-10-24 16:17:47,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:17:47,748 INFO L276 IsEmpty]: Start isEmpty. Operand 144403 states and 147207 transitions. [2018-10-24 16:17:47,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1038 [2018-10-24 16:17:47,811 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:17:47,812 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:17:47,812 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:17:47,812 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:17:47,813 INFO L82 PathProgramCache]: Analyzing trace with hash 942381596, now seen corresponding path program 1 times [2018-10-24 16:17:47,813 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:17:47,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:17:47,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:17:47,814 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:17:47,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:17:47,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:17:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 799 backedges. 153 proven. 382 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2018-10-24 16:17:49,928 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:17:49,928 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 [2018-10-24 16:17:49,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:17:50,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:17:50,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:17:51,624 INFO L134 CoverageAnalysis]: Checked inductivity of 799 backedges. 203 proven. 332 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2018-10-24 16:17:51,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:17:51,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2018-10-24 16:17:51,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 16:17:51,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 16:17:51,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:17:51,647 INFO L87 Difference]: Start difference. First operand 144403 states and 147207 transitions. Second operand 7 states. [2018-10-24 16:18:08,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:18:08,831 INFO L93 Difference]: Finished difference Result 352727 states and 359878 transitions. [2018-10-24 16:18:08,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 16:18:08,832 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1037 [2018-10-24 16:18:08,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:18:09,065 INFO L225 Difference]: With dead ends: 352727 [2018-10-24 16:18:09,065 INFO L226 Difference]: Without dead ends: 214342 [2018-10-24 16:18:09,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1041 GetRequests, 1035 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:18:09,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214342 states. [2018-10-24 16:18:11,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214342 to 174483. [2018-10-24 16:18:11,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174483 states. [2018-10-24 16:18:11,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174483 states to 174483 states and 178073 transitions. [2018-10-24 16:18:11,257 INFO L78 Accepts]: Start accepts. Automaton has 174483 states and 178073 transitions. Word has length 1037 [2018-10-24 16:18:11,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:18:11,258 INFO L481 AbstractCegarLoop]: Abstraction has 174483 states and 178073 transitions. [2018-10-24 16:18:11,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 16:18:11,258 INFO L276 IsEmpty]: Start isEmpty. Operand 174483 states and 178073 transitions. [2018-10-24 16:18:11,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1305 [2018-10-24 16:18:11,354 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:18:11,355 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:18:11,355 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:18:11,355 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:18:11,356 INFO L82 PathProgramCache]: Analyzing trace with hash -298410865, now seen corresponding path program 1 times [2018-10-24 16:18:11,356 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:18:11,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:18:11,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:18:11,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:18:11,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:18:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:18:14,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1686 backedges. 1230 proven. 315 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2018-10-24 16:18:14,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:18:14,261 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 [2018-10-24 16:18:14,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:18:14,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:18:14,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:18:16,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1686 backedges. 1230 proven. 315 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2018-10-24 16:18:16,400 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:18:16,400 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2018-10-24 16:18:16,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 16:18:16,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 16:18:16,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 16:18:16,402 INFO L87 Difference]: Start difference. First operand 174483 states and 178073 transitions. Second operand 6 states. Received shutdown request... [2018-10-24 16:18:21,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 16:18:21,989 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 16:18:21,995 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 16:18:21,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 04:18:21 BoogieIcfgContainer [2018-10-24 16:18:21,996 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 16:18:21,997 INFO L168 Benchmark]: Toolchain (without parser) took 228390.94 ms. Allocated memory was 1.5 GB in the beginning and 4.6 GB in the end (delta: 3.1 GB). Free memory was 1.4 GB in the beginning and 2.5 GB in the end (delta: -1.1 GB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2018-10-24 16:18:21,998 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. [2018-10-24 16:18:21,999 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2182.18 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 203.5 MB). Peak memory consumption was 203.5 MB. Max. memory is 7.1 GB. [2018-10-24 16:18:21,999 INFO L168 Benchmark]: Boogie Procedure Inliner took 652.55 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 804.3 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -996.4 MB). Peak memory consumption was 68.8 MB. Max. memory is 7.1 GB. [2018-10-24 16:18:22,000 INFO L168 Benchmark]: Boogie Preprocessor took 326.48 ms. Allocated memory is still 2.4 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 36.5 MB). Peak memory consumption was 36.5 MB. Max. memory is 7.1 GB. [2018-10-24 16:18:22,001 INFO L168 Benchmark]: RCFGBuilder took 8929.91 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 234.4 MB). Free memory was 2.2 GB in the beginning and 2.4 GB in the end (delta: -197.1 MB). Peak memory consumption was 651.7 MB. Max. memory is 7.1 GB. [2018-10-24 16:18:22,002 INFO L168 Benchmark]: TraceAbstraction took 216293.84 ms. Allocated memory was 2.6 GB in the beginning and 4.6 GB in the end (delta: 2.0 GB). Free memory was 2.4 GB in the beginning and 2.5 GB in the end (delta: -117.0 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. [2018-10-24 16:18:22,008 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 2182.18 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 203.5 MB). Peak memory consumption was 203.5 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 652.55 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 804.3 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -996.4 MB). Peak memory consumption was 68.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 326.48 ms. Allocated memory is still 2.4 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 36.5 MB). Peak memory consumption was 36.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8929.91 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 234.4 MB). Free memory was 2.2 GB in the beginning and 2.4 GB in the end (delta: -197.1 MB). Peak memory consumption was 651.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 216293.84 ms. Allocated memory was 2.6 GB in the beginning and 4.6 GB in the end (delta: 2.0 GB). Free memory was 2.4 GB in the beginning and 2.5 GB in the end (delta: -117.0 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 168]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 168). Cancelled while BasicCegarLoop was constructing difference of abstraction (174483states) and FLOYD_HOARE automaton (currently 9 states, 6 states before enhancement),while ReachableStatesComputation was computing reachable states (20041 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 819 locations, 1 error locations. TIMEOUT Result, 216.2s OverallTime, 16 OverallIterations, 6 TraceHistogramMax, 170.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 8663 SDtfs, 46638 SDslu, 1187 SDs, 0 SdLazy, 81543 SolverSat, 15383 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 132.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3544 GetRequests, 3467 SyntacticMatches, 19 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 5.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=179776occurred in iteration=13, 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: 19.4s AutomataMinimizationTime, 15 MinimizatonAttempts, 157931 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 11.9s InterpolantComputationTime, 11726 NumberOfCodeBlocks, 11726 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 11705 ConstructedInterpolants, 0 QuantifiedInterpolants, 26093051 SizeOfPredicates, 3 NumberOfNonLiveVariables, 4095 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 21 InterpolantComputations, 14 PerfectInterpolantSequences, 10628/11996 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown