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/Problem15_label16_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 20:29:15,769 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 20:29:15,772 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 20:29:15,787 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 20:29:15,788 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 20:29:15,789 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 20:29:15,790 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 20:29:15,792 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 20:29:15,794 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 20:29:15,794 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 20:29:15,795 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 20:29:15,796 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 20:29:15,796 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 20:29:15,797 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 20:29:15,799 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 20:29:15,799 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 20:29:15,800 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 20:29:15,802 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 20:29:15,804 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 20:29:15,806 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 20:29:15,807 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 20:29:15,808 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 20:29:15,811 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-23 20:29:15,822 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-23 20:29:15,858 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 20:29:15,858 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 20:29:15,860 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 20:29:15,860 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 20:29:15,861 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 20:29:15,861 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 20:29:15,861 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 20:29:15,861 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 20:29:15,862 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 20:29:15,863 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 20:29:15,863 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 20:29:15,863 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 20:29:15,864 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 20:29:15,864 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 20:29:15,864 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 20:29:15,864 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 20:29:15,864 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 20:29:15,865 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 20:29:15,865 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 20:29:15,865 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 20:29:15,865 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 20:29:15,865 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 20:29:15,866 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 20:29:15,866 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 20:29:15,866 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 20:29:15,866 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 20:29:15,866 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 20:29:15,867 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 20:29:15,950 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 20:29:15,967 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 20:29:15,971 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 20:29:15,973 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 20:29:15,974 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 20:29:15,975 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label16_true-unreach-call.c [2018-10-23 20:29:16,037 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/059b084b9/3210daa7eda549a9923c4ced9559da84/FLAG578de60d7 [2018-10-23 20:29:16,713 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 20:29:16,714 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label16_true-unreach-call.c [2018-10-23 20:29:16,737 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/059b084b9/3210daa7eda549a9923c4ced9559da84/FLAG578de60d7 [2018-10-23 20:29:16,759 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/059b084b9/3210daa7eda549a9923c4ced9559da84 [2018-10-23 20:29:16,771 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 20:29:16,772 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 20:29:16,774 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 20:29:16,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 20:29:16,778 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 20:29:16,779 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:29:16" (1/1) ... [2018-10-23 20:29:16,782 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65fbebad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:16, skipping insertion in model container [2018-10-23 20:29:16,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:29:16" (1/1) ... [2018-10-23 20:29:16,793 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 20:29:16,898 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 20:29:17,759 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 20:29:17,769 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 20:29:18,098 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 20:29:18,121 INFO L193 MainTranslator]: Completed translation [2018-10-23 20:29:18,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:18 WrapperNode [2018-10-23 20:29:18,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 20:29:18,123 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 20:29:18,124 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 20:29:18,126 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 20:29:18,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:18" (1/1) ... [2018-10-23 20:29:18,185 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:18" (1/1) ... [2018-10-23 20:29:18,525 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 20:29:18,526 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 20:29:18,526 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 20:29:18,526 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 20:29:18,537 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:18" (1/1) ... [2018-10-23 20:29:18,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:18" (1/1) ... [2018-10-23 20:29:18,562 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:18" (1/1) ... [2018-10-23 20:29:18,562 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:18" (1/1) ... [2018-10-23 20:29:18,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:18" (1/1) ... [2018-10-23 20:29:18,665 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:18" (1/1) ... [2018-10-23 20:29:18,701 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:18" (1/1) ... [2018-10-23 20:29:18,741 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 20:29:18,742 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 20:29:18,742 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 20:29:18,742 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 20:29:18,743 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 20:29:18,810 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-23 20:29:18,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 20:29:18,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 20:29:27,450 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 20:29:27,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:29:27 BoogieIcfgContainer [2018-10-23 20:29:27,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 20:29:27,452 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 20:29:27,452 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 20:29:27,456 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 20:29:27,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:29:16" (1/3) ... [2018-10-23 20:29:27,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d72c4f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:29:27, skipping insertion in model container [2018-10-23 20:29:27,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:18" (2/3) ... [2018-10-23 20:29:27,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d72c4f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:29:27, skipping insertion in model container [2018-10-23 20:29:27,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:29:27" (3/3) ... [2018-10-23 20:29:27,460 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label16_true-unreach-call.c [2018-10-23 20:29:27,469 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 20:29:27,477 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 20:29:27,495 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 20:29:27,535 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 20:29:27,536 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 20:29:27,536 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 20:29:27,537 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 20:29:27,537 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 20:29:27,537 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 20:29:27,537 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 20:29:27,537 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 20:29:27,537 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 20:29:27,566 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states. [2018-10-23 20:29:27,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-23 20:29:27,576 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:29:27,578 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:29:27,580 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:29:27,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:29:27,587 INFO L82 PathProgramCache]: Analyzing trace with hash 265969354, now seen corresponding path program 1 times [2018-10-23 20:29:27,589 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:29:27,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:29:27,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:29:27,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:29:27,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:29:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:29:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:29:28,125 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:29:28,125 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:29:28,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:29:28,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:29:28,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:29:28,148 INFO L87 Difference]: Start difference. First operand 425 states. Second operand 4 states. [2018-10-23 20:29:37,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:29:37,015 INFO L93 Difference]: Finished difference Result 1474 states and 2723 transitions. [2018-10-23 20:29:37,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:29:37,017 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2018-10-23 20:29:37,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:29:37,053 INFO L225 Difference]: With dead ends: 1474 [2018-10-23 20:29:37,053 INFO L226 Difference]: Without dead ends: 1042 [2018-10-23 20:29:37,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:29:37,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2018-10-23 20:29:37,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 1040. [2018-10-23 20:29:37,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1040 states. [2018-10-23 20:29:37,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 1638 transitions. [2018-10-23 20:29:37,194 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 1638 transitions. Word has length 63 [2018-10-23 20:29:37,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:29:37,194 INFO L481 AbstractCegarLoop]: Abstraction has 1040 states and 1638 transitions. [2018-10-23 20:29:37,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:29:37,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 1638 transitions. [2018-10-23 20:29:37,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-10-23 20:29:37,202 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:29:37,203 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:29:37,203 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:29:37,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:29:37,206 INFO L82 PathProgramCache]: Analyzing trace with hash -899294482, now seen corresponding path program 1 times [2018-10-23 20:29:37,206 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:29:37,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:29:37,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:29:37,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:29:37,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:29:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:29:37,640 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:29:37,641 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:29:37,641 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:29:37,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:29:37,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:29:37,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:29:37,644 INFO L87 Difference]: Start difference. First operand 1040 states and 1638 transitions. Second operand 5 states. [2018-10-23 20:29:52,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:29:52,430 INFO L93 Difference]: Finished difference Result 3299 states and 5135 transitions. [2018-10-23 20:29:52,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:29:52,433 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 129 [2018-10-23 20:29:52,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:29:52,446 INFO L225 Difference]: With dead ends: 3299 [2018-10-23 20:29:52,447 INFO L226 Difference]: Without dead ends: 2261 [2018-10-23 20:29:52,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:29:52,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2261 states. [2018-10-23 20:29:52,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2261 to 1953. [2018-10-23 20:29:52,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1953 states. [2018-10-23 20:29:52,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 2816 transitions. [2018-10-23 20:29:52,505 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 2816 transitions. Word has length 129 [2018-10-23 20:29:52,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:29:52,506 INFO L481 AbstractCegarLoop]: Abstraction has 1953 states and 2816 transitions. [2018-10-23 20:29:52,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:29:52,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 2816 transitions. [2018-10-23 20:29:52,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-23 20:29:52,510 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:29:52,510 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, 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] [2018-10-23 20:29:52,511 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:29:52,511 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:29:52,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183744, now seen corresponding path program 1 times [2018-10-23 20:29:52,511 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:29:52,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:29:52,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:29:52,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:29:52,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:29:52,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:29:52,912 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:29:52,912 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:29:52,913 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:29:52,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:29:52,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:29:52,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:29:52,916 INFO L87 Difference]: Start difference. First operand 1953 states and 2816 transitions. Second operand 4 states. [2018-10-23 20:29:58,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:29:58,169 INFO L93 Difference]: Finished difference Result 7212 states and 10585 transitions. [2018-10-23 20:29:58,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:29:58,171 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2018-10-23 20:29:58,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:29:58,198 INFO L225 Difference]: With dead ends: 7212 [2018-10-23 20:29:58,198 INFO L226 Difference]: Without dead ends: 5261 [2018-10-23 20:29:58,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:29:58,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5261 states. [2018-10-23 20:29:58,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5261 to 5255. [2018-10-23 20:29:58,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5255 states. [2018-10-23 20:29:58,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5255 states to 5255 states and 6986 transitions. [2018-10-23 20:29:58,307 INFO L78 Accepts]: Start accepts. Automaton has 5255 states and 6986 transitions. Word has length 134 [2018-10-23 20:29:58,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:29:58,308 INFO L481 AbstractCegarLoop]: Abstraction has 5255 states and 6986 transitions. [2018-10-23 20:29:58,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:29:58,308 INFO L276 IsEmpty]: Start isEmpty. Operand 5255 states and 6986 transitions. [2018-10-23 20:29:58,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-10-23 20:29:58,314 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:29:58,314 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:29:58,314 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:29:58,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:29:58,315 INFO L82 PathProgramCache]: Analyzing trace with hash -648643925, now seen corresponding path program 1 times [2018-10-23 20:29:58,315 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:29:58,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:29:58,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:29:58,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:29:58,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:29:58,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:29:58,739 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 121 proven. 4 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-10-23 20:29:58,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:29:58,740 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:29:58,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:29:58,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:29:58,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:29:58,984 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 200 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:29:59,021 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:29:59,022 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-10-23 20:29:59,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:29:59,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:29:59,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:29:59,023 INFO L87 Difference]: Start difference. First operand 5255 states and 6986 transitions. Second operand 4 states. [2018-10-23 20:30:04,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:30:04,587 INFO L93 Difference]: Finished difference Result 19280 states and 26028 transitions. [2018-10-23 20:30:04,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:30:04,589 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 235 [2018-10-23 20:30:04,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:30:04,664 INFO L225 Difference]: With dead ends: 19280 [2018-10-23 20:30:04,664 INFO L226 Difference]: Without dead ends: 14027 [2018-10-23 20:30:04,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:30:04,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14027 states. [2018-10-23 20:30:04,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14027 to 8857. [2018-10-23 20:30:04,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8857 states. [2018-10-23 20:30:04,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8857 states to 8857 states and 11192 transitions. [2018-10-23 20:30:04,864 INFO L78 Accepts]: Start accepts. Automaton has 8857 states and 11192 transitions. Word has length 235 [2018-10-23 20:30:04,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:30:04,865 INFO L481 AbstractCegarLoop]: Abstraction has 8857 states and 11192 transitions. [2018-10-23 20:30:04,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:30:04,865 INFO L276 IsEmpty]: Start isEmpty. Operand 8857 states and 11192 transitions. [2018-10-23 20:30:04,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2018-10-23 20:30:04,875 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:30:04,876 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:30:04,876 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:30:04,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:30:04,877 INFO L82 PathProgramCache]: Analyzing trace with hash -845032929, now seen corresponding path program 1 times [2018-10-23 20:30:04,877 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:30:04,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:30:04,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:30:04,878 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:30:04,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:30:04,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:30:05,330 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-23 20:30:05,482 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2018-10-23 20:30:05,672 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-10-23 20:30:05,672 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:30:05,672 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:30:05,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:30:05,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:30:05,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:30:05,673 INFO L87 Difference]: Start difference. First operand 8857 states and 11192 transitions. Second operand 5 states. [2018-10-23 20:30:12,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:30:12,550 INFO L93 Difference]: Finished difference Result 19215 states and 24057 transitions. [2018-10-23 20:30:12,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:30:12,550 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 337 [2018-10-23 20:30:12,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:30:12,588 INFO L225 Difference]: With dead ends: 19215 [2018-10-23 20:30:12,588 INFO L226 Difference]: Without dead ends: 10360 [2018-10-23 20:30:12,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:30:12,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10360 states. [2018-10-23 20:30:12,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10360 to 10057. [2018-10-23 20:30:12,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10057 states. [2018-10-23 20:30:12,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10057 states to 10057 states and 12448 transitions. [2018-10-23 20:30:12,787 INFO L78 Accepts]: Start accepts. Automaton has 10057 states and 12448 transitions. Word has length 337 [2018-10-23 20:30:12,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:30:12,788 INFO L481 AbstractCegarLoop]: Abstraction has 10057 states and 12448 transitions. [2018-10-23 20:30:12,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:30:12,788 INFO L276 IsEmpty]: Start isEmpty. Operand 10057 states and 12448 transitions. [2018-10-23 20:30:12,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-10-23 20:30:12,801 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:30:12,802 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:30:12,802 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:30:12,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:30:12,803 INFO L82 PathProgramCache]: Analyzing trace with hash -506042351, now seen corresponding path program 1 times [2018-10-23 20:30:12,803 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:30:12,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:30:12,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:30:12,804 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:30:12,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:30:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:30:13,242 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-10-23 20:30:13,242 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:30:13,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:30:13,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:30:13,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:30:13,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:30:13,244 INFO L87 Difference]: Start difference. First operand 10057 states and 12448 transitions. Second operand 4 states. [2018-10-23 20:30:17,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:30:17,824 INFO L93 Difference]: Finished difference Result 25814 states and 32434 transitions. [2018-10-23 20:30:17,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:30:17,825 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 411 [2018-10-23 20:30:17,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:30:17,858 INFO L225 Difference]: With dead ends: 25814 [2018-10-23 20:30:17,858 INFO L226 Difference]: Without dead ends: 15759 [2018-10-23 20:30:17,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:30:17,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15759 states. [2018-10-23 20:30:18,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15759 to 15759. [2018-10-23 20:30:18,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15759 states. [2018-10-23 20:30:18,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15759 states to 15759 states and 18917 transitions. [2018-10-23 20:30:18,108 INFO L78 Accepts]: Start accepts. Automaton has 15759 states and 18917 transitions. Word has length 411 [2018-10-23 20:30:18,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:30:18,109 INFO L481 AbstractCegarLoop]: Abstraction has 15759 states and 18917 transitions. [2018-10-23 20:30:18,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:30:18,110 INFO L276 IsEmpty]: Start isEmpty. Operand 15759 states and 18917 transitions. [2018-10-23 20:30:18,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2018-10-23 20:30:18,130 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:30:18,130 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:30:18,131 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:30:18,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:30:18,131 INFO L82 PathProgramCache]: Analyzing trace with hash -2057211809, now seen corresponding path program 1 times [2018-10-23 20:30:18,132 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:30:18,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:30:18,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:30:18,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:30:18,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:30:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:30:19,043 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 358 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-10-23 20:30:19,044 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:30:19,044 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:30:19,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:30:19,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:30:19,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:30:19,051 INFO L87 Difference]: Start difference. First operand 15759 states and 18917 transitions. Second operand 4 states. [2018-10-23 20:30:24,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:30:24,654 INFO L93 Difference]: Finished difference Result 31518 states and 37839 transitions. [2018-10-23 20:30:24,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:30:24,655 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2018-10-23 20:30:24,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:30:24,684 INFO L225 Difference]: With dead ends: 31518 [2018-10-23 20:30:24,684 INFO L226 Difference]: Without dead ends: 15761 [2018-10-23 20:30:24,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:30:24,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15761 states. [2018-10-23 20:30:24,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15761 to 15757. [2018-10-23 20:30:24,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15757 states. [2018-10-23 20:30:24,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15757 states to 15757 states and 18094 transitions. [2018-10-23 20:30:24,892 INFO L78 Accepts]: Start accepts. Automaton has 15757 states and 18094 transitions. Word has length 496 [2018-10-23 20:30:24,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:30:24,892 INFO L481 AbstractCegarLoop]: Abstraction has 15757 states and 18094 transitions. [2018-10-23 20:30:24,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:30:24,893 INFO L276 IsEmpty]: Start isEmpty. Operand 15757 states and 18094 transitions. [2018-10-23 20:30:24,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2018-10-23 20:30:24,911 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:30:24,912 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:30:24,912 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:30:24,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:30:24,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1720017519, now seen corresponding path program 1 times [2018-10-23 20:30:24,913 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:30:24,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:30:24,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:30:24,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:30:24,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:30:24,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:30:25,769 WARN L179 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2018-10-23 20:30:26,103 WARN L179 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2018-10-23 20:30:26,410 WARN L179 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 14 [2018-10-23 20:30:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 542 proven. 4 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2018-10-23 20:30:27,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:30:27,054 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:30:27,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:30:27,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:30:27,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:30:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 593 proven. 0 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2018-10-23 20:30:27,469 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:30:27,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2018-10-23 20:30:27,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-23 20:30:27,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-23 20:30:27,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-10-23 20:30:27,472 INFO L87 Difference]: Start difference. First operand 15757 states and 18094 transitions. Second operand 8 states. [2018-10-23 20:30:38,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:30:38,498 INFO L93 Difference]: Finished difference Result 35882 states and 40871 transitions. [2018-10-23 20:30:38,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-23 20:30:38,499 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 520 [2018-10-23 20:30:38,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:30:38,530 INFO L225 Difference]: With dead ends: 35882 [2018-10-23 20:30:38,530 INFO L226 Difference]: Without dead ends: 16052 [2018-10-23 20:30:38,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 523 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-10-23 20:30:38,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16052 states. [2018-10-23 20:30:38,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16052 to 15752. [2018-10-23 20:30:38,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states. [2018-10-23 20:30:38,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 17369 transitions. [2018-10-23 20:30:38,730 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 17369 transitions. Word has length 520 [2018-10-23 20:30:38,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:30:38,730 INFO L481 AbstractCegarLoop]: Abstraction has 15752 states and 17369 transitions. [2018-10-23 20:30:38,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-23 20:30:38,731 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 17369 transitions. [2018-10-23 20:30:38,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2018-10-23 20:30:38,749 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:30:38,750 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:30:38,750 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:30:38,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:30:38,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1798089204, now seen corresponding path program 1 times [2018-10-23 20:30:38,751 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:30:38,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:30:38,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:30:38,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:30:38,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:30:38,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:30:39,458 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-23 20:30:40,029 WARN L179 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 21 [2018-10-23 20:30:40,482 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 271 proven. 136 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2018-10-23 20:30:40,482 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:30:40,483 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:30:40,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:30:40,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:30:40,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:30:40,898 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 339 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-10-23 20:30:40,919 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:30:40,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2018-10-23 20:30:40,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 20:30:40,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 20:30:40,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-23 20:30:40,921 INFO L87 Difference]: Start difference. First operand 15752 states and 17369 transitions. Second operand 9 states. [2018-10-23 20:30:43,718 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-10-23 20:30:51,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:30:51,601 INFO L93 Difference]: Finished difference Result 31968 states and 35207 transitions. [2018-10-23 20:30:51,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-23 20:30:51,604 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 521 [2018-10-23 20:30:51,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:30:51,626 INFO L225 Difference]: With dead ends: 31968 [2018-10-23 20:30:51,626 INFO L226 Difference]: Without dead ends: 16218 [2018-10-23 20:30:51,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 525 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-10-23 20:30:51,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16218 states. [2018-10-23 20:30:51,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16218 to 15748. [2018-10-23 20:30:51,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15748 states. [2018-10-23 20:30:51,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15748 states to 15748 states and 16802 transitions. [2018-10-23 20:30:51,833 INFO L78 Accepts]: Start accepts. Automaton has 15748 states and 16802 transitions. Word has length 521 [2018-10-23 20:30:51,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:30:51,834 INFO L481 AbstractCegarLoop]: Abstraction has 15748 states and 16802 transitions. [2018-10-23 20:30:51,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-23 20:30:51,834 INFO L276 IsEmpty]: Start isEmpty. Operand 15748 states and 16802 transitions. [2018-10-23 20:30:51,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2018-10-23 20:30:51,846 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:30:51,846 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:30:51,847 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:30:51,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:30:51,847 INFO L82 PathProgramCache]: Analyzing trace with hash 191164642, now seen corresponding path program 1 times [2018-10-23 20:30:51,847 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:30:51,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:30:51,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:30:51,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:30:51,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:30:51,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:30:52,247 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2018-10-23 20:30:52,248 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:30:52,248 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:30:52,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 20:30:52,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 20:30:52,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:30:52,249 INFO L87 Difference]: Start difference. First operand 15748 states and 16802 transitions. Second operand 3 states. [2018-10-23 20:30:56,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:30:56,253 INFO L93 Difference]: Finished difference Result 32092 states and 34276 transitions. [2018-10-23 20:30:56,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 20:30:56,254 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 567 [2018-10-23 20:30:56,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:30:56,271 INFO L225 Difference]: With dead ends: 32092 [2018-10-23 20:30:56,272 INFO L226 Difference]: Without dead ends: 16346 [2018-10-23 20:30:56,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:30:56,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16346 states. [2018-10-23 20:30:56,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16346 to 15746. [2018-10-23 20:30:56,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15746 states. [2018-10-23 20:30:56,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15746 states to 15746 states and 16798 transitions. [2018-10-23 20:30:56,461 INFO L78 Accepts]: Start accepts. Automaton has 15746 states and 16798 transitions. Word has length 567 [2018-10-23 20:30:56,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:30:56,462 INFO L481 AbstractCegarLoop]: Abstraction has 15746 states and 16798 transitions. [2018-10-23 20:30:56,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 20:30:56,463 INFO L276 IsEmpty]: Start isEmpty. Operand 15746 states and 16798 transitions. [2018-10-23 20:30:56,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 646 [2018-10-23 20:30:56,476 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:30:56,477 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:30:56,477 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:30:56,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:30:56,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1070353790, now seen corresponding path program 1 times [2018-10-23 20:30:56,479 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:30:56,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:30:56,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:30:56,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:30:56,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:30:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:30:57,241 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 482 proven. 0 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2018-10-23 20:30:57,242 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:30:57,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:30:57,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 20:30:57,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 20:30:57,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:30:57,243 INFO L87 Difference]: Start difference. First operand 15746 states and 16798 transitions. Second operand 3 states. [2018-10-23 20:30:59,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:30:59,698 INFO L93 Difference]: Finished difference Result 37802 states and 40568 transitions. [2018-10-23 20:30:59,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 20:30:59,699 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 645 [2018-10-23 20:30:59,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:30:59,722 INFO L225 Difference]: With dead ends: 37802 [2018-10-23 20:30:59,722 INFO L226 Difference]: Without dead ends: 22058 [2018-10-23 20:30:59,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:30:59,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22058 states. [2018-10-23 20:30:59,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22058 to 22048. [2018-10-23 20:30:59,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22048 states. [2018-10-23 20:30:59,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22048 states to 22048 states and 23453 transitions. [2018-10-23 20:30:59,974 INFO L78 Accepts]: Start accepts. Automaton has 22048 states and 23453 transitions. Word has length 645 [2018-10-23 20:30:59,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:30:59,974 INFO L481 AbstractCegarLoop]: Abstraction has 22048 states and 23453 transitions. [2018-10-23 20:30:59,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 20:30:59,975 INFO L276 IsEmpty]: Start isEmpty. Operand 22048 states and 23453 transitions. [2018-10-23 20:30:59,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 692 [2018-10-23 20:30:59,994 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:30:59,995 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:30:59,995 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:30:59,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:30:59,996 INFO L82 PathProgramCache]: Analyzing trace with hash -684261465, now seen corresponding path program 1 times [2018-10-23 20:30:59,996 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:30:59,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:30:59,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:30:59,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:30:59,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:31:00,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:31:00,628 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 461 trivial. 0 not checked. [2018-10-23 20:31:00,629 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:31:00,629 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 20:31:00,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:31:00,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:31:00,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:31:00,630 INFO L87 Difference]: Start difference. First operand 22048 states and 23453 transitions. Second operand 5 states. [2018-10-23 20:31:08,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:31:08,096 INFO L93 Difference]: Finished difference Result 58815 states and 62612 transitions. [2018-10-23 20:31:08,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 20:31:08,096 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 691 [2018-10-23 20:31:08,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:31:08,129 INFO L225 Difference]: With dead ends: 58815 [2018-10-23 20:31:08,129 INFO L226 Difference]: Without dead ends: 36769 [2018-10-23 20:31:08,146 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:31:08,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36769 states. [2018-10-23 20:31:08,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36769 to 28645. [2018-10-23 20:31:08,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28645 states. [2018-10-23 20:31:08,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28645 states to 28645 states and 30252 transitions. [2018-10-23 20:31:08,436 INFO L78 Accepts]: Start accepts. Automaton has 28645 states and 30252 transitions. Word has length 691 [2018-10-23 20:31:08,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:31:08,436 INFO L481 AbstractCegarLoop]: Abstraction has 28645 states and 30252 transitions. [2018-10-23 20:31:08,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:31:08,437 INFO L276 IsEmpty]: Start isEmpty. Operand 28645 states and 30252 transitions. [2018-10-23 20:31:08,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 697 [2018-10-23 20:31:08,457 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:31:08,458 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:31:08,458 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:31:08,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:31:08,458 INFO L82 PathProgramCache]: Analyzing trace with hash 778946677, now seen corresponding path program 1 times [2018-10-23 20:31:08,458 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:31:08,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:31:08,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:31:08,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:31:08,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:31:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:31:09,072 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2018-10-23 20:31:09,073 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:31:09,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:31:09,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 20:31:09,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 20:31:09,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:31:09,074 INFO L87 Difference]: Start difference. First operand 28645 states and 30252 transitions. Second operand 3 states. [2018-10-23 20:31:12,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:31:12,633 INFO L93 Difference]: Finished difference Result 59687 states and 63192 transitions. [2018-10-23 20:31:12,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 20:31:12,633 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 696 [2018-10-23 20:31:12,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:31:12,659 INFO L225 Difference]: With dead ends: 59687 [2018-10-23 20:31:12,660 INFO L226 Difference]: Without dead ends: 31044 [2018-10-23 20:31:12,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:31:12,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31044 states. [2018-10-23 20:31:12,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31044 to 31044. [2018-10-23 20:31:12,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31044 states. [2018-10-23 20:31:12,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31044 states to 31044 states and 32565 transitions. [2018-10-23 20:31:12,932 INFO L78 Accepts]: Start accepts. Automaton has 31044 states and 32565 transitions. Word has length 696 [2018-10-23 20:31:12,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:31:12,933 INFO L481 AbstractCegarLoop]: Abstraction has 31044 states and 32565 transitions. [2018-10-23 20:31:12,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 20:31:12,933 INFO L276 IsEmpty]: Start isEmpty. Operand 31044 states and 32565 transitions. [2018-10-23 20:31:12,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 759 [2018-10-23 20:31:12,951 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:31:12,952 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, 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, 4, 4, 4, 4, 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, 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] [2018-10-23 20:31:12,952 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:31:12,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:31:12,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1922978813, now seen corresponding path program 1 times [2018-10-23 20:31:12,952 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:31:12,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:31:12,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:31:12,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:31:12,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:31:13,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:31:13,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1289 backedges. 623 proven. 0 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2018-10-23 20:31:13,926 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:31:13,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:31:13,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 20:31:13,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 20:31:13,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:31:13,928 INFO L87 Difference]: Start difference. First operand 31044 states and 32565 transitions. Second operand 3 states. [2018-10-23 20:31:16,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:31:16,001 INFO L93 Difference]: Finished difference Result 56339 states and 59052 transitions. [2018-10-23 20:31:16,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 20:31:16,002 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 758 [2018-10-23 20:31:16,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:31:16,018 INFO L225 Difference]: With dead ends: 56339 [2018-10-23 20:31:16,018 INFO L226 Difference]: Without dead ends: 16562 [2018-10-23 20:31:16,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:31:16,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16562 states. [2018-10-23 20:31:16,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16562 to 13862. [2018-10-23 20:31:16,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13862 states. [2018-10-23 20:31:16,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13862 states to 13862 states and 14243 transitions. [2018-10-23 20:31:16,168 INFO L78 Accepts]: Start accepts. Automaton has 13862 states and 14243 transitions. Word has length 758 [2018-10-23 20:31:16,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:31:16,168 INFO L481 AbstractCegarLoop]: Abstraction has 13862 states and 14243 transitions. [2018-10-23 20:31:16,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 20:31:16,169 INFO L276 IsEmpty]: Start isEmpty. Operand 13862 states and 14243 transitions. [2018-10-23 20:31:16,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 814 [2018-10-23 20:31:16,177 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:31:16,177 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:31:16,178 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:31:16,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:31:16,178 INFO L82 PathProgramCache]: Analyzing trace with hash -562456670, now seen corresponding path program 1 times [2018-10-23 20:31:16,178 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:31:16,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:31:16,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:31:16,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:31:16,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:31:16,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:31:17,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 243 proven. 0 refuted. 0 times theorem prover too weak. 839 trivial. 0 not checked. [2018-10-23 20:31:17,213 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:31:17,214 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:31:17,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 20:31:17,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 20:31:17,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:31:17,215 INFO L87 Difference]: Start difference. First operand 13862 states and 14243 transitions. Second operand 3 states. [2018-10-23 20:31:19,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:31:19,767 INFO L93 Difference]: Finished difference Result 30428 states and 31275 transitions. [2018-10-23 20:31:19,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 20:31:19,767 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 813 [2018-10-23 20:31:19,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:31:19,783 INFO L225 Difference]: With dead ends: 30428 [2018-10-23 20:31:19,784 INFO L226 Difference]: Without dead ends: 16567 [2018-10-23 20:31:19,793 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:31:19,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16567 states. [2018-10-23 20:31:19,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16567 to 15361. [2018-10-23 20:31:19,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15361 states. [2018-10-23 20:31:19,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15361 states to 15361 states and 15758 transitions. [2018-10-23 20:31:19,930 INFO L78 Accepts]: Start accepts. Automaton has 15361 states and 15758 transitions. Word has length 813 [2018-10-23 20:31:19,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:31:19,931 INFO L481 AbstractCegarLoop]: Abstraction has 15361 states and 15758 transitions. [2018-10-23 20:31:19,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 20:31:19,931 INFO L276 IsEmpty]: Start isEmpty. Operand 15361 states and 15758 transitions. [2018-10-23 20:31:19,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 833 [2018-10-23 20:31:19,939 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:31:19,940 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:31:19,940 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:31:19,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:31:19,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1363917183, now seen corresponding path program 1 times [2018-10-23 20:31:19,941 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:31:19,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:31:19,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:31:19,942 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:31:19,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:31:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:31:20,716 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 3 [2018-10-23 20:31:20,931 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 5 [2018-10-23 20:31:21,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 682 proven. 56 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2018-10-23 20:31:21,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:31:21,526 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:31:21,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:31:21,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:31:21,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:31:21,977 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 17 [2018-10-23 20:31:22,615 WARN L179 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 32 [2018-10-23 20:31:24,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 684 proven. 54 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2018-10-23 20:31:24,583 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 20:31:24,584 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-10-23 20:31:24,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-23 20:31:24,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-23 20:31:24,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-10-23 20:31:24,585 INFO L87 Difference]: Start difference. First operand 15361 states and 15758 transitions. Second operand 8 states. [2018-10-23 20:31:39,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:31:39,075 INFO L93 Difference]: Finished difference Result 39458 states and 40556 transitions. [2018-10-23 20:31:39,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-23 20:31:39,076 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 832 [2018-10-23 20:31:39,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:31:39,095 INFO L225 Difference]: With dead ends: 39458 [2018-10-23 20:31:39,095 INFO L226 Difference]: Without dead ends: 23490 [2018-10-23 20:31:39,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 846 GetRequests, 835 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2018-10-23 20:31:39,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23490 states. [2018-10-23 20:31:39,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23490 to 15657. [2018-10-23 20:31:39,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15657 states. [2018-10-23 20:31:39,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15657 states to 15657 states and 16050 transitions. [2018-10-23 20:31:39,267 INFO L78 Accepts]: Start accepts. Automaton has 15657 states and 16050 transitions. Word has length 832 [2018-10-23 20:31:39,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:31:39,267 INFO L481 AbstractCegarLoop]: Abstraction has 15657 states and 16050 transitions. [2018-10-23 20:31:39,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-23 20:31:39,267 INFO L276 IsEmpty]: Start isEmpty. Operand 15657 states and 16050 transitions. [2018-10-23 20:31:39,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 842 [2018-10-23 20:31:39,277 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:31:39,277 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, 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, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:31:39,277 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:31:39,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:31:39,278 INFO L82 PathProgramCache]: Analyzing trace with hash 51617314, now seen corresponding path program 1 times [2018-10-23 20:31:39,278 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:31:39,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:31:39,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:31:39,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:31:39,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:31:39,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:31:40,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1357 backedges. 805 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2018-10-23 20:31:40,024 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:31:40,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:31:40,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 20:31:40,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 20:31:40,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:31:40,025 INFO L87 Difference]: Start difference. First operand 15657 states and 16050 transitions. Second operand 3 states. [2018-10-23 20:31:41,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:31:41,521 INFO L93 Difference]: Finished difference Result 32216 states and 33040 transitions. [2018-10-23 20:31:41,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 20:31:41,521 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 841 [2018-10-23 20:31:41,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:31:41,536 INFO L225 Difference]: With dead ends: 32216 [2018-10-23 20:31:41,536 INFO L226 Difference]: Without dead ends: 16861 [2018-10-23 20:31:41,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:31:41,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16861 states. [2018-10-23 20:31:41,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16861 to 15354. [2018-10-23 20:31:41,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15354 states. [2018-10-23 20:31:41,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15354 states to 15354 states and 15717 transitions. [2018-10-23 20:31:41,686 INFO L78 Accepts]: Start accepts. Automaton has 15354 states and 15717 transitions. Word has length 841 [2018-10-23 20:31:41,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:31:41,687 INFO L481 AbstractCegarLoop]: Abstraction has 15354 states and 15717 transitions. [2018-10-23 20:31:41,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 20:31:41,687 INFO L276 IsEmpty]: Start isEmpty. Operand 15354 states and 15717 transitions. [2018-10-23 20:31:41,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 855 [2018-10-23 20:31:41,698 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:31:41,698 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:31:41,698 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:31:41,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:31:41,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1597390021, now seen corresponding path program 1 times [2018-10-23 20:31:41,699 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:31:41,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:31:41,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:31:41,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:31:41,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:31:41,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:31:43,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1402 backedges. 562 proven. 399 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2018-10-23 20:31:43,669 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:31:43,669 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:31:43,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:31:43,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:31:44,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:31:44,386 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 16 [2018-10-23 20:31:45,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1402 backedges. 834 proven. 188 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2018-10-23 20:31:45,397 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 20:31:45,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 10 [2018-10-23 20:31:45,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-23 20:31:45,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-23 20:31:45,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-10-23 20:31:45,399 INFO L87 Difference]: Start difference. First operand 15354 states and 15717 transitions. Second operand 10 states. [2018-10-23 20:31:53,451 WARN L179 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2018-10-23 20:32:02,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:32:02,531 INFO L93 Difference]: Finished difference Result 41245 states and 42245 transitions. [2018-10-23 20:32:02,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-23 20:32:02,532 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 854 [2018-10-23 20:32:02,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:32:02,554 INFO L225 Difference]: With dead ends: 41245 [2018-10-23 20:32:02,555 INFO L226 Difference]: Without dead ends: 25886 [2018-10-23 20:32:02,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 903 GetRequests, 872 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=223, Invalid=833, Unknown=0, NotChecked=0, Total=1056 [2018-10-23 20:32:02,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25886 states. [2018-10-23 20:32:02,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25886 to 15350. [2018-10-23 20:32:02,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15350 states. [2018-10-23 20:32:02,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15350 states to 15350 states and 15632 transitions. [2018-10-23 20:32:02,745 INFO L78 Accepts]: Start accepts. Automaton has 15350 states and 15632 transitions. Word has length 854 [2018-10-23 20:32:02,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:32:02,746 INFO L481 AbstractCegarLoop]: Abstraction has 15350 states and 15632 transitions. [2018-10-23 20:32:02,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-23 20:32:02,746 INFO L276 IsEmpty]: Start isEmpty. Operand 15350 states and 15632 transitions. [2018-10-23 20:32:02,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 912 [2018-10-23 20:32:02,759 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:32:02,760 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-23 20:32:02,760 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:32:02,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:32:02,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1666864483, now seen corresponding path program 1 times [2018-10-23 20:32:02,761 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:32:02,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:32:02,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:32:02,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:32:02,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:32:02,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:32:03,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1468 backedges. 1141 proven. 80 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2018-10-23 20:32:03,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:32:03,791 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:32:03,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:32:04,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:32:04,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:32:04,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1468 backedges. 1141 proven. 77 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2018-10-23 20:32:04,909 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 20:32:04,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 11 [2018-10-23 20:32:04,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-23 20:32:04,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-23 20:32:04,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-10-23 20:32:04,911 INFO L87 Difference]: Start difference. First operand 15350 states and 15632 transitions. Second operand 11 states. [2018-10-23 20:32:14,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:32:14,859 INFO L93 Difference]: Finished difference Result 31607 states and 32193 transitions. [2018-10-23 20:32:14,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-23 20:32:14,859 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 911 [2018-10-23 20:32:14,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:32:14,874 INFO L225 Difference]: With dead ends: 31607 [2018-10-23 20:32:14,874 INFO L226 Difference]: Without dead ends: 18059 [2018-10-23 20:32:14,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 936 GetRequests, 916 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2018-10-23 20:32:14,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18059 states. [2018-10-23 20:32:15,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18059 to 15650. [2018-10-23 20:32:15,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15650 states. [2018-10-23 20:32:15,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15650 states to 15650 states and 15900 transitions. [2018-10-23 20:32:15,054 INFO L78 Accepts]: Start accepts. Automaton has 15650 states and 15900 transitions. Word has length 911 [2018-10-23 20:32:15,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:32:15,055 INFO L481 AbstractCegarLoop]: Abstraction has 15650 states and 15900 transitions. [2018-10-23 20:32:15,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-23 20:32:15,055 INFO L276 IsEmpty]: Start isEmpty. Operand 15650 states and 15900 transitions. [2018-10-23 20:32:15,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 918 [2018-10-23 20:32:15,069 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:32:15,070 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, 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, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-23 20:32:15,070 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:32:15,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:32:15,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1766446063, now seen corresponding path program 1 times [2018-10-23 20:32:15,071 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:32:15,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:32:15,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:32:15,072 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:32:15,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:32:15,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:32:16,200 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-23 20:32:16,360 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2018-10-23 20:32:18,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1484 backedges. 999 proven. 135 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2018-10-23 20:32:18,550 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:32:18,551 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:32:18,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:32:18,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:32:18,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:32:21,429 WARN L179 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 31 [2018-10-23 20:32:22,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1484 backedges. 927 proven. 207 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2018-10-23 20:32:22,960 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 20:32:22,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6] total 18 [2018-10-23 20:32:22,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-23 20:32:22,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-23 20:32:22,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=233, Unknown=1, NotChecked=0, Total=306 [2018-10-23 20:32:22,963 INFO L87 Difference]: Start difference. First operand 15650 states and 15900 transitions. Second operand 18 states. Received shutdown request... [2018-10-23 20:33:10,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-23 20:33:10,084 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 20:33:10,090 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 20:33:10,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:33:10 BoogieIcfgContainer [2018-10-23 20:33:10,091 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 20:33:10,092 INFO L168 Benchmark]: Toolchain (without parser) took 233320.19 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 3.2 GB in the end (delta: -1.8 GB). Peak memory consumption was 824.9 MB. Max. memory is 7.1 GB. [2018-10-23 20:33:10,092 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 20:33:10,093 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1348.82 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 105.9 MB). Peak memory consumption was 105.9 MB. Max. memory is 7.1 GB. [2018-10-23 20:33:10,094 INFO L168 Benchmark]: Boogie Procedure Inliner took 402.10 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 750.3 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -875.5 MB). Peak memory consumption was 33.2 MB. Max. memory is 7.1 GB. [2018-10-23 20:33:10,094 INFO L168 Benchmark]: Boogie Preprocessor took 215.95 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 41.5 MB). Peak memory consumption was 41.5 MB. Max. memory is 7.1 GB. [2018-10-23 20:33:10,095 INFO L168 Benchmark]: RCFGBuilder took 8709.23 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 1.8 GB in the end (delta: 313.6 MB). Peak memory consumption was 313.6 MB. Max. memory is 7.1 GB. [2018-10-23 20:33:10,096 INFO L168 Benchmark]: TraceAbstraction took 222638.66 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 1.8 GB in the beginning and 3.2 GB in the end (delta: -1.4 GB). Peak memory consumption was 489.2 MB. Max. memory is 7.1 GB. [2018-10-23 20:33:10,100 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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 1348.82 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 105.9 MB). Peak memory consumption was 105.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 402.10 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 750.3 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -875.5 MB). Peak memory consumption was 33.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 215.95 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 41.5 MB). Peak memory consumption was 41.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8709.23 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 1.8 GB in the end (delta: 313.6 MB). Peak memory consumption was 313.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 222638.66 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 1.8 GB in the beginning and 3.2 GB in the end (delta: -1.4 GB). Peak memory consumption was 489.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 193]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 193). Cancelled while BasicCegarLoop was constructing difference of abstraction (15650states) and FLOYD_HOARE automaton (currently 24 states, 18 states before enhancement),while ReachableStatesComputation was computing reachable states (3454 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 425 locations, 1 error locations. TIMEOUT Result, 222.5s OverallTime, 20 OverallIterations, 6 TraceHistogramMax, 186.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 5840 SDtfs, 29283 SDslu, 3329 SDs, 0 SdLazy, 69680 SolverSat, 6968 SolverUnsat, 22 SolverUnknown, 0 SolverNotchecked, 164.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5014 GetRequests, 4858 SyntacticMatches, 21 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 12.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31044occurred 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: 3.3s AutomataMinimizationTime, 19 MinimizatonAttempts, 41488 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 21.4s InterpolantComputationTime, 16161 NumberOfCodeBlocks, 16161 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 16134 ConstructedInterpolants, 638 QuantifiedInterpolants, 46180833 SizeOfPredicates, 13 NumberOfNonLiveVariables, 5683 ConjunctsInSsa, 37 ConjunctsInUnsatCore, 27 InterpolantComputations, 16 PerfectInterpolantSequences, 19614/20954 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown