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/Problem11_label00_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 13:59:07,844 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 13:59:07,847 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 13:59:07,860 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 13:59:07,861 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 13:59:07,862 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 13:59:07,863 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 13:59:07,865 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 13:59:07,866 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 13:59:07,867 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 13:59:07,868 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 13:59:07,868 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 13:59:07,869 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 13:59:07,870 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 13:59:07,871 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 13:59:07,872 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 13:59:07,873 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 13:59:07,874 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 13:59:07,876 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 13:59:07,878 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 13:59:07,879 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 13:59:07,880 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 13:59:07,883 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 13:59:07,883 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 13:59:07,883 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 13:59:07,884 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 13:59:07,885 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 13:59:07,886 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 13:59:07,887 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 13:59:07,888 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 13:59:07,888 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 13:59:07,889 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-24 13:59:07,889 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-24 13:59:07,890 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-24 13:59:07,891 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-24 13:59:07,892 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-24 13:59:07,892 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-24 13:59:07,907 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 13:59:07,908 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 13:59:07,909 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 13:59:07,909 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 13:59:07,909 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 13:59:07,910 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 13:59:07,910 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 13:59:07,910 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 13:59:07,910 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 13:59:07,910 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 13:59:07,911 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 13:59:07,911 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 13:59:07,911 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 13:59:07,911 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 13:59:07,911 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 13:59:07,912 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 13:59:07,912 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 13:59:07,912 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 13:59:07,912 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 13:59:07,912 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 13:59:07,913 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 13:59:07,913 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 13:59:07,913 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 13:59:07,913 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 13:59:07,913 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 13:59:07,914 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 13:59:07,914 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 13:59:07,914 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 13:59:07,958 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 13:59:07,977 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 13:59:07,981 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 13:59:07,982 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 13:59:07,983 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 13:59:07,984 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label00_false-unreach-call.c [2018-10-24 13:59:08,045 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5d02a4922/c0ea6842b2ce4f7f9206b1da3f57012f/FLAGf1c8598ee [2018-10-24 13:59:08,679 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 13:59:08,680 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label00_false-unreach-call.c [2018-10-24 13:59:08,694 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5d02a4922/c0ea6842b2ce4f7f9206b1da3f57012f/FLAGf1c8598ee [2018-10-24 13:59:08,717 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5d02a4922/c0ea6842b2ce4f7f9206b1da3f57012f [2018-10-24 13:59:08,729 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 13:59:08,731 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 13:59:08,733 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 13:59:08,735 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 13:59:08,739 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 13:59:08,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 01:59:08" (1/1) ... [2018-10-24 13:59:08,744 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47d53142 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:59:08, skipping insertion in model container [2018-10-24 13:59:08,744 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 01:59:08" (1/1) ... [2018-10-24 13:59:08,754 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 13:59:08,820 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 13:59:09,447 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 13:59:09,451 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 13:59:09,645 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 13:59:09,664 INFO L193 MainTranslator]: Completed translation [2018-10-24 13:59:09,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:59:09 WrapperNode [2018-10-24 13:59:09,665 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 13:59:09,666 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 13:59:09,666 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 13:59:09,667 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 13:59:09,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:59:09" (1/1) ... [2018-10-24 13:59:09,704 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:59:09" (1/1) ... [2018-10-24 13:59:09,938 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 13:59:09,939 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 13:59:09,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 13:59:09,941 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 13:59:09,954 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:59:09" (1/1) ... [2018-10-24 13:59:09,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:59:09" (1/1) ... [2018-10-24 13:59:09,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:59:09" (1/1) ... [2018-10-24 13:59:09,971 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:59:09" (1/1) ... [2018-10-24 13:59:10,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:59:09" (1/1) ... [2018-10-24 13:59:10,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:59:09" (1/1) ... [2018-10-24 13:59:10,065 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:59:09" (1/1) ... [2018-10-24 13:59:10,084 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 13:59:10,085 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 13:59:10,085 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 13:59:10,085 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 13:59:10,086 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:59:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 13:59:10,157 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 13:59:10,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 13:59:10,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 13:59:14,717 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 13:59:14,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 01:59:14 BoogieIcfgContainer [2018-10-24 13:59:14,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 13:59:14,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 13:59:14,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 13:59:14,724 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 13:59:14,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 01:59:08" (1/3) ... [2018-10-24 13:59:14,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37b30517 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 01:59:14, skipping insertion in model container [2018-10-24 13:59:14,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:59:09" (2/3) ... [2018-10-24 13:59:14,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37b30517 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 01:59:14, skipping insertion in model container [2018-10-24 13:59:14,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 01:59:14" (3/3) ... [2018-10-24 13:59:14,728 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label00_false-unreach-call.c [2018-10-24 13:59:14,739 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 13:59:14,748 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 13:59:14,766 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 13:59:14,806 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 13:59:14,807 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 13:59:14,808 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 13:59:14,808 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 13:59:14,808 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 13:59:14,808 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 13:59:14,808 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 13:59:14,809 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 13:59:14,809 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 13:59:14,837 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states. [2018-10-24 13:59:14,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-24 13:59:14,843 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:59:14,845 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-24 13:59:14,847 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:59:14,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:59:14,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1805984234, now seen corresponding path program 1 times [2018-10-24 13:59:14,856 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:59:14,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:59:14,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:59:14,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:59:14,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:59:14,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:59:15,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 13:59:15,080 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 13:59:15,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 13:59:15,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 13:59:15,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 13:59:15,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 13:59:15,104 INFO L87 Difference]: Start difference. First operand 284 states. Second operand 3 states. [2018-10-24 13:59:18,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:59:18,070 INFO L93 Difference]: Finished difference Result 764 states and 1348 transitions. [2018-10-24 13:59:18,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 13:59:18,073 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-10-24 13:59:18,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:59:18,095 INFO L225 Difference]: With dead ends: 764 [2018-10-24 13:59:18,095 INFO L226 Difference]: Without dead ends: 476 [2018-10-24 13:59:18,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 13:59:18,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2018-10-24 13:59:18,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 476. [2018-10-24 13:59:18,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 476 states. [2018-10-24 13:59:18,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 723 transitions. [2018-10-24 13:59:18,185 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 723 transitions. Word has length 7 [2018-10-24 13:59:18,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:59:18,186 INFO L481 AbstractCegarLoop]: Abstraction has 476 states and 723 transitions. [2018-10-24 13:59:18,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 13:59:18,186 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 723 transitions. [2018-10-24 13:59:18,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-24 13:59:18,188 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:59:18,189 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 13:59:18,189 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:59:18,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:59:18,189 INFO L82 PathProgramCache]: Analyzing trace with hash 252209906, now seen corresponding path program 1 times [2018-10-24 13:59:18,190 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:59:18,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:59:18,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:59:18,191 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:59:18,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:59:18,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:59:18,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 13:59:18,498 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 13:59:18,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 13:59:18,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 13:59:18,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 13:59:18,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 13:59:18,501 INFO L87 Difference]: Start difference. First operand 476 states and 723 transitions. Second operand 4 states. [2018-10-24 13:59:23,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:59:23,108 INFO L93 Difference]: Finished difference Result 1713 states and 2683 transitions. [2018-10-24 13:59:23,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 13:59:23,111 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2018-10-24 13:59:23,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:59:23,119 INFO L225 Difference]: With dead ends: 1713 [2018-10-24 13:59:23,119 INFO L226 Difference]: Without dead ends: 1239 [2018-10-24 13:59:23,123 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 13:59:23,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2018-10-24 13:59:23,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1222. [2018-10-24 13:59:23,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1222 states. [2018-10-24 13:59:23,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 1765 transitions. [2018-10-24 13:59:23,176 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 1765 transitions. Word has length 76 [2018-10-24 13:59:23,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:59:23,177 INFO L481 AbstractCegarLoop]: Abstraction has 1222 states and 1765 transitions. [2018-10-24 13:59:23,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 13:59:23,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 1765 transitions. [2018-10-24 13:59:23,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-24 13:59:23,180 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:59:23,180 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 13:59:23,180 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:59:23,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:59:23,181 INFO L82 PathProgramCache]: Analyzing trace with hash 2120204934, now seen corresponding path program 1 times [2018-10-24 13:59:23,181 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:59:23,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:59:23,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:59:23,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:59:23,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:59:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:59:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 13:59:23,426 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 13:59:23,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 13:59:23,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 13:59:23,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 13:59:23,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 13:59:23,427 INFO L87 Difference]: Start difference. First operand 1222 states and 1765 transitions. Second operand 4 states. [2018-10-24 13:59:28,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:59:28,064 INFO L93 Difference]: Finished difference Result 4508 states and 6630 transitions. [2018-10-24 13:59:28,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 13:59:28,065 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2018-10-24 13:59:28,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:59:28,082 INFO L225 Difference]: With dead ends: 4508 [2018-10-24 13:59:28,083 INFO L226 Difference]: Without dead ends: 3288 [2018-10-24 13:59:28,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 13:59:28,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3288 states. [2018-10-24 13:59:28,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3288 to 2333. [2018-10-24 13:59:28,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2333 states. [2018-10-24 13:59:28,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2333 states to 2333 states and 3059 transitions. [2018-10-24 13:59:28,144 INFO L78 Accepts]: Start accepts. Automaton has 2333 states and 3059 transitions. Word has length 84 [2018-10-24 13:59:28,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:59:28,145 INFO L481 AbstractCegarLoop]: Abstraction has 2333 states and 3059 transitions. [2018-10-24 13:59:28,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 13:59:28,145 INFO L276 IsEmpty]: Start isEmpty. Operand 2333 states and 3059 transitions. [2018-10-24 13:59:28,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-24 13:59:28,150 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:59:28,150 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 13:59:28,151 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:59:28,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:59:28,151 INFO L82 PathProgramCache]: Analyzing trace with hash -711414924, now seen corresponding path program 1 times [2018-10-24 13:59:28,151 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:59:28,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:59:28,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:59:28,153 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:59:28,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:59:28,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:59:28,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 13:59:28,326 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 13:59:28,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 13:59:28,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 13:59:28,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 13:59:28,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 13:59:28,329 INFO L87 Difference]: Start difference. First operand 2333 states and 3059 transitions. Second operand 3 states. [2018-10-24 13:59:30,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:59:30,061 INFO L93 Difference]: Finished difference Result 5231 states and 6955 transitions. [2018-10-24 13:59:30,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 13:59:30,061 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 135 [2018-10-24 13:59:30,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:59:30,078 INFO L225 Difference]: With dead ends: 5231 [2018-10-24 13:59:30,078 INFO L226 Difference]: Without dead ends: 3085 [2018-10-24 13:59:30,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 13:59:30,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3085 states. [2018-10-24 13:59:30,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3085 to 3075. [2018-10-24 13:59:30,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3075 states. [2018-10-24 13:59:30,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3075 states to 3075 states and 3850 transitions. [2018-10-24 13:59:30,138 INFO L78 Accepts]: Start accepts. Automaton has 3075 states and 3850 transitions. Word has length 135 [2018-10-24 13:59:30,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:59:30,139 INFO L481 AbstractCegarLoop]: Abstraction has 3075 states and 3850 transitions. [2018-10-24 13:59:30,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 13:59:30,139 INFO L276 IsEmpty]: Start isEmpty. Operand 3075 states and 3850 transitions. [2018-10-24 13:59:30,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-24 13:59:30,152 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:59:30,152 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 13:59:30,152 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:59:30,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:59:30,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1216999507, now seen corresponding path program 1 times [2018-10-24 13:59:30,153 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:59:30,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:59:30,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:59:30,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:59:30,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:59:30,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:59:30,352 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-10-24 13:59:30,352 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 13:59:30,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 13:59:30,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 13:59:30,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 13:59:30,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 13:59:30,354 INFO L87 Difference]: Start difference. First operand 3075 states and 3850 transitions. Second operand 3 states. [2018-10-24 13:59:32,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:59:32,771 INFO L93 Difference]: Finished difference Result 6713 states and 8534 transitions. [2018-10-24 13:59:32,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 13:59:32,771 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 190 [2018-10-24 13:59:32,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:59:32,788 INFO L225 Difference]: With dead ends: 6713 [2018-10-24 13:59:32,788 INFO L226 Difference]: Without dead ends: 3825 [2018-10-24 13:59:32,793 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 13:59:32,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3825 states. [2018-10-24 13:59:32,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3825 to 3815. [2018-10-24 13:59:32,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3815 states. [2018-10-24 13:59:32,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3815 states to 3815 states and 4711 transitions. [2018-10-24 13:59:32,873 INFO L78 Accepts]: Start accepts. Automaton has 3815 states and 4711 transitions. Word has length 190 [2018-10-24 13:59:32,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:59:32,874 INFO L481 AbstractCegarLoop]: Abstraction has 3815 states and 4711 transitions. [2018-10-24 13:59:32,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 13:59:32,874 INFO L276 IsEmpty]: Start isEmpty. Operand 3815 states and 4711 transitions. [2018-10-24 13:59:32,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-10-24 13:59:32,877 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:59:32,878 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 13:59:32,878 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:59:32,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:59:32,879 INFO L82 PathProgramCache]: Analyzing trace with hash -288878765, now seen corresponding path program 1 times [2018-10-24 13:59:32,879 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:59:32,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:59:32,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:59:32,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:59:32,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:59:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:59:33,154 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-10-24 13:59:33,154 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 13:59:33,154 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 13:59:33,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 13:59:33,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 13:59:33,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 13:59:33,155 INFO L87 Difference]: Start difference. First operand 3815 states and 4711 transitions. Second operand 3 states. [2018-10-24 13:59:37,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:59:37,109 INFO L93 Difference]: Finished difference Result 7454 states and 9251 transitions. [2018-10-24 13:59:37,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 13:59:37,109 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 191 [2018-10-24 13:59:37,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:59:37,125 INFO L225 Difference]: With dead ends: 7454 [2018-10-24 13:59:37,125 INFO L226 Difference]: Without dead ends: 3826 [2018-10-24 13:59:37,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 13:59:37,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3826 states. [2018-10-24 13:59:37,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3826 to 3630. [2018-10-24 13:59:37,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3630 states. [2018-10-24 13:59:37,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3630 states to 3630 states and 4456 transitions. [2018-10-24 13:59:37,188 INFO L78 Accepts]: Start accepts. Automaton has 3630 states and 4456 transitions. Word has length 191 [2018-10-24 13:59:37,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:59:37,189 INFO L481 AbstractCegarLoop]: Abstraction has 3630 states and 4456 transitions. [2018-10-24 13:59:37,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 13:59:37,189 INFO L276 IsEmpty]: Start isEmpty. Operand 3630 states and 4456 transitions. [2018-10-24 13:59:37,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-10-24 13:59:37,192 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:59:37,192 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 13:59:37,193 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:59:37,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:59:37,193 INFO L82 PathProgramCache]: Analyzing trace with hash -200068027, now seen corresponding path program 1 times [2018-10-24 13:59:37,193 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:59:37,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:59:37,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:59:37,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:59:37,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:59:37,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:59:37,549 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 9 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 13:59:37,550 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 13:59:37,550 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 13:59:37,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:59:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:59:37,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 13:59:38,594 WARN L179 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 28 [2018-10-24 13:59:39,144 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 9 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 13:59:39,178 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 13:59:39,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2018-10-24 13:59:39,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 13:59:39,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 13:59:39,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-24 13:59:39,180 INFO L87 Difference]: Start difference. First operand 3630 states and 4456 transitions. Second operand 7 states. [2018-10-24 13:59:39,390 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-10-24 13:59:51,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:59:51,632 INFO L93 Difference]: Finished difference Result 13231 states and 16738 transitions. [2018-10-24 13:59:51,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-24 13:59:51,634 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 211 [2018-10-24 13:59:51,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:59:51,683 INFO L225 Difference]: With dead ends: 13231 [2018-10-24 13:59:51,683 INFO L226 Difference]: Without dead ends: 9224 [2018-10-24 13:59:51,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2018-10-24 13:59:51,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9224 states. [2018-10-24 13:59:51,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9224 to 8837. [2018-10-24 13:59:51,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8837 states. [2018-10-24 13:59:51,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8837 states to 8837 states and 10625 transitions. [2018-10-24 13:59:51,873 INFO L78 Accepts]: Start accepts. Automaton has 8837 states and 10625 transitions. Word has length 211 [2018-10-24 13:59:51,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:59:51,874 INFO L481 AbstractCegarLoop]: Abstraction has 8837 states and 10625 transitions. [2018-10-24 13:59:51,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 13:59:51,874 INFO L276 IsEmpty]: Start isEmpty. Operand 8837 states and 10625 transitions. [2018-10-24 13:59:51,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-10-24 13:59:51,878 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:59:51,878 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 13:59:51,878 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:59:51,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:59:51,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1903243135, now seen corresponding path program 1 times [2018-10-24 13:59:51,879 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:59:51,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:59:51,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:59:51,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:59:51,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:59:51,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:59:52,346 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 13:59:52,347 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 13:59:52,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 13:59:52,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 13:59:52,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 13:59:52,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 13:59:52,349 INFO L87 Difference]: Start difference. First operand 8837 states and 10625 transitions. Second operand 5 states. [2018-10-24 13:59:55,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:59:55,656 INFO L93 Difference]: Finished difference Result 26416 states and 31979 transitions. [2018-10-24 13:59:55,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 13:59:55,657 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 221 [2018-10-24 13:59:55,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:59:55,703 INFO L225 Difference]: With dead ends: 26416 [2018-10-24 13:59:55,703 INFO L226 Difference]: Without dead ends: 15328 [2018-10-24 13:59:55,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 13:59:55,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15328 states. [2018-10-24 13:59:56,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15328 to 15138. [2018-10-24 13:59:56,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15138 states. [2018-10-24 13:59:56,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15138 states to 15138 states and 17342 transitions. [2018-10-24 13:59:56,060 INFO L78 Accepts]: Start accepts. Automaton has 15138 states and 17342 transitions. Word has length 221 [2018-10-24 13:59:56,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:59:56,060 INFO L481 AbstractCegarLoop]: Abstraction has 15138 states and 17342 transitions. [2018-10-24 13:59:56,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 13:59:56,061 INFO L276 IsEmpty]: Start isEmpty. Operand 15138 states and 17342 transitions. [2018-10-24 13:59:56,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-10-24 13:59:56,064 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:59:56,064 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 13:59:56,065 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:59:56,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:59:56,065 INFO L82 PathProgramCache]: Analyzing trace with hash -278196410, now seen corresponding path program 1 times [2018-10-24 13:59:56,065 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:59:56,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:59:56,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:59:56,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:59:56,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:59:56,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:59:56,476 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-24 13:59:56,944 WARN L179 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2018-10-24 13:59:57,452 WARN L179 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2018-10-24 13:59:57,701 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 4 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 13:59:57,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 13:59:57,701 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 [2018-10-24 13:59:57,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:59:57,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:59:57,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 13:59:58,494 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 75 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 13:59:58,516 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 13:59:58,516 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 10 [2018-10-24 13:59:58,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-24 13:59:58,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-24 13:59:58,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-10-24 13:59:58,517 INFO L87 Difference]: Start difference. First operand 15138 states and 17342 transitions. Second operand 11 states. [2018-10-24 14:00:09,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:00:09,001 INFO L93 Difference]: Finished difference Result 35597 states and 40702 transitions. [2018-10-24 14:00:09,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-24 14:00:09,001 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 223 [2018-10-24 14:00:09,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:00:09,039 INFO L225 Difference]: With dead ends: 35597 [2018-10-24 14:00:09,039 INFO L226 Difference]: Without dead ends: 19781 [2018-10-24 14:00:09,057 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 219 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=167, Invalid=339, Unknown=0, NotChecked=0, Total=506 [2018-10-24 14:00:09,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19781 states. [2018-10-24 14:00:09,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19781 to 16832. [2018-10-24 14:00:09,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16832 states. [2018-10-24 14:00:09,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16832 states to 16832 states and 18922 transitions. [2018-10-24 14:00:09,331 INFO L78 Accepts]: Start accepts. Automaton has 16832 states and 18922 transitions. Word has length 223 [2018-10-24 14:00:09,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:00:09,331 INFO L481 AbstractCegarLoop]: Abstraction has 16832 states and 18922 transitions. [2018-10-24 14:00:09,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-24 14:00:09,332 INFO L276 IsEmpty]: Start isEmpty. Operand 16832 states and 18922 transitions. [2018-10-24 14:00:09,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-10-24 14:00:09,336 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:00:09,337 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:00:09,337 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:00:09,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:00:09,338 INFO L82 PathProgramCache]: Analyzing trace with hash 721350625, now seen corresponding path program 1 times [2018-10-24 14:00:09,338 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:00:09,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:00:09,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:00:09,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:00:09,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:00:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:00:09,734 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:00:09,735 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:00:09,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:00:09,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:00:09,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:00:09,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:00:09,736 INFO L87 Difference]: Start difference. First operand 16832 states and 18922 transitions. Second operand 4 states. [2018-10-24 14:00:13,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:00:13,021 INFO L93 Difference]: Finished difference Result 32367 states and 36528 transitions. [2018-10-24 14:00:13,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:00:13,022 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 242 [2018-10-24 14:00:13,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:00:13,051 INFO L225 Difference]: With dead ends: 32367 [2018-10-24 14:00:13,051 INFO L226 Difference]: Without dead ends: 16818 [2018-10-24 14:00:13,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:00:13,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16818 states. [2018-10-24 14:00:13,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16818 to 13965. [2018-10-24 14:00:13,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13965 states. [2018-10-24 14:00:13,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13965 states to 13965 states and 15504 transitions. [2018-10-24 14:00:13,269 INFO L78 Accepts]: Start accepts. Automaton has 13965 states and 15504 transitions. Word has length 242 [2018-10-24 14:00:13,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:00:13,269 INFO L481 AbstractCegarLoop]: Abstraction has 13965 states and 15504 transitions. [2018-10-24 14:00:13,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:00:13,270 INFO L276 IsEmpty]: Start isEmpty. Operand 13965 states and 15504 transitions. [2018-10-24 14:00:13,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-10-24 14:00:13,274 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:00:13,274 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:00:13,275 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:00:13,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:00:13,275 INFO L82 PathProgramCache]: Analyzing trace with hash 970404768, now seen corresponding path program 1 times [2018-10-24 14:00:13,275 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:00:13,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:00:13,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:00:13,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:00:13,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:00:13,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:00:13,453 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-10-24 14:00:13,454 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:00:13,454 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:00:13,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 14:00:13,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 14:00:13,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:00:13,455 INFO L87 Difference]: Start difference. First operand 13965 states and 15504 transitions. Second operand 3 states. [2018-10-24 14:00:14,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:00:14,526 INFO L93 Difference]: Finished difference Result 25519 states and 28398 transitions. [2018-10-24 14:00:14,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:00:14,526 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 248 [2018-10-24 14:00:14,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:00:14,543 INFO L225 Difference]: With dead ends: 25519 [2018-10-24 14:00:14,543 INFO L226 Difference]: Without dead ends: 13965 [2018-10-24 14:00:14,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:00:14,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13965 states. [2018-10-24 14:00:14,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13965 to 13780. [2018-10-24 14:00:14,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13780 states. [2018-10-24 14:00:14,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13780 states to 13780 states and 15226 transitions. [2018-10-24 14:00:14,878 INFO L78 Accepts]: Start accepts. Automaton has 13780 states and 15226 transitions. Word has length 248 [2018-10-24 14:00:14,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:00:14,879 INFO L481 AbstractCegarLoop]: Abstraction has 13780 states and 15226 transitions. [2018-10-24 14:00:14,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 14:00:14,879 INFO L276 IsEmpty]: Start isEmpty. Operand 13780 states and 15226 transitions. [2018-10-24 14:00:14,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-10-24 14:00:14,885 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:00:14,885 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:00:14,885 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:00:14,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:00:14,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1274978665, now seen corresponding path program 1 times [2018-10-24 14:00:14,886 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:00:14,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:00:14,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:00:14,887 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:00:14,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:00:14,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:00:15,546 WARN L179 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 7 [2018-10-24 14:00:15,876 WARN L179 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 8 [2018-10-24 14:00:15,971 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 94 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:00:15,972 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:00:15,972 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:00:15,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:00:16,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:00:16,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:00:16,630 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 9 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:00:16,666 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 14:00:16,667 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2018-10-24 14:00:16,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 14:00:16,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 14:00:16,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-10-24 14:00:16,669 INFO L87 Difference]: Start difference. First operand 13780 states and 15226 transitions. Second operand 9 states. [2018-10-24 14:00:17,120 WARN L179 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2018-10-24 14:00:25,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:00:25,392 INFO L93 Difference]: Finished difference Result 34821 states and 38514 transitions. [2018-10-24 14:00:25,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-24 14:00:25,393 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 266 [2018-10-24 14:00:25,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:00:25,417 INFO L225 Difference]: With dead ends: 34821 [2018-10-24 14:00:25,418 INFO L226 Difference]: Without dead ends: 20273 [2018-10-24 14:00:25,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2018-10-24 14:00:25,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20273 states. [2018-10-24 14:00:25,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20273 to 14930. [2018-10-24 14:00:25,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14930 states. [2018-10-24 14:00:25,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14930 states to 14930 states and 16174 transitions. [2018-10-24 14:00:25,652 INFO L78 Accepts]: Start accepts. Automaton has 14930 states and 16174 transitions. Word has length 266 [2018-10-24 14:00:25,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:00:25,653 INFO L481 AbstractCegarLoop]: Abstraction has 14930 states and 16174 transitions. [2018-10-24 14:00:25,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 14:00:25,653 INFO L276 IsEmpty]: Start isEmpty. Operand 14930 states and 16174 transitions. [2018-10-24 14:00:25,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-10-24 14:00:25,661 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:00:25,662 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:00:25,662 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:00:25,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:00:25,662 INFO L82 PathProgramCache]: Analyzing trace with hash -267079001, now seen corresponding path program 1 times [2018-10-24 14:00:25,663 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:00:25,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:00:25,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:00:25,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:00:25,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:00:25,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:00:26,063 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-10-24 14:00:26,064 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:00:26,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:00:26,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:00:26,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:00:26,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:00:26,065 INFO L87 Difference]: Start difference. First operand 14930 states and 16174 transitions. Second operand 4 states. [2018-10-24 14:00:29,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:00:29,542 INFO L93 Difference]: Finished difference Result 31727 states and 34314 transitions. [2018-10-24 14:00:29,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:00:29,543 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 292 [2018-10-24 14:00:29,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:00:29,562 INFO L225 Difference]: With dead ends: 31727 [2018-10-24 14:00:29,562 INFO L226 Difference]: Without dead ends: 16517 [2018-10-24 14:00:29,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:00:29,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16517 states. [2018-10-24 14:00:29,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16517 to 12983. [2018-10-24 14:00:29,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12983 states. [2018-10-24 14:00:29,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12983 states to 12983 states and 13970 transitions. [2018-10-24 14:00:29,771 INFO L78 Accepts]: Start accepts. Automaton has 12983 states and 13970 transitions. Word has length 292 [2018-10-24 14:00:29,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:00:29,772 INFO L481 AbstractCegarLoop]: Abstraction has 12983 states and 13970 transitions. [2018-10-24 14:00:29,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:00:29,772 INFO L276 IsEmpty]: Start isEmpty. Operand 12983 states and 13970 transitions. [2018-10-24 14:00:29,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2018-10-24 14:00:29,781 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:00:29,781 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:00:29,782 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:00:29,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:00:29,782 INFO L82 PathProgramCache]: Analyzing trace with hash -915599231, now seen corresponding path program 1 times [2018-10-24 14:00:29,782 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:00:29,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:00:29,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:00:29,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:00:29,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:00:29,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:00:30,364 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-10-24 14:00:30,445 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 14 proven. 181 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2018-10-24 14:00:30,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:00:30,445 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:00:30,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:00:30,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:00:30,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:00:30,883 WARN L179 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 28 [2018-10-24 14:00:31,504 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 14 proven. 181 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2018-10-24 14:00:31,525 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 14:00:31,525 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2018-10-24 14:00:31,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 14:00:31,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 14:00:31,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-24 14:00:31,526 INFO L87 Difference]: Start difference. First operand 12983 states and 13970 transitions. Second operand 7 states. [2018-10-24 14:00:35,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:00:35,108 INFO L93 Difference]: Finished difference Result 23091 states and 24881 transitions. [2018-10-24 14:00:35,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 14:00:35,109 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 319 [2018-10-24 14:00:35,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:00:35,119 INFO L225 Difference]: With dead ends: 23091 [2018-10-24 14:00:35,120 INFO L226 Difference]: Without dead ends: 12896 [2018-10-24 14:00:35,127 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-10-24 14:00:35,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12896 states. [2018-10-24 14:00:35,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12896 to 12706. [2018-10-24 14:00:35,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12706 states. [2018-10-24 14:00:35,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12706 states to 12706 states and 13638 transitions. [2018-10-24 14:00:35,295 INFO L78 Accepts]: Start accepts. Automaton has 12706 states and 13638 transitions. Word has length 319 [2018-10-24 14:00:35,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:00:35,296 INFO L481 AbstractCegarLoop]: Abstraction has 12706 states and 13638 transitions. [2018-10-24 14:00:35,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 14:00:35,296 INFO L276 IsEmpty]: Start isEmpty. Operand 12706 states and 13638 transitions. [2018-10-24 14:00:35,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2018-10-24 14:00:35,302 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:00:35,302 INFO L375 BasicCegarLoop]: trace histogram [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, 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] [2018-10-24 14:00:35,302 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:00:35,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:00:35,303 INFO L82 PathProgramCache]: Analyzing trace with hash 2085459001, now seen corresponding path program 1 times [2018-10-24 14:00:35,303 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:00:35,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:00:35,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:00:35,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:00:35,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:00:35,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:00:35,639 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 288 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-24 14:00:35,639 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:00:35,639 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:00:35,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 14:00:35,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 14:00:35,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:00:35,640 INFO L87 Difference]: Start difference. First operand 12706 states and 13638 transitions. Second operand 5 states. [2018-10-24 14:00:37,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:00:37,889 INFO L93 Difference]: Finished difference Result 27637 states and 29615 transitions. [2018-10-24 14:00:37,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 14:00:37,890 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 325 [2018-10-24 14:00:37,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:00:37,909 INFO L225 Difference]: With dead ends: 27637 [2018-10-24 14:00:37,909 INFO L226 Difference]: Without dead ends: 15117 [2018-10-24 14:00:37,919 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 [2018-10-24 14:00:37,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15117 states. [2018-10-24 14:00:38,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15117 to 11031. [2018-10-24 14:00:38,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11031 states. [2018-10-24 14:00:38,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11031 states to 11031 states and 11692 transitions. [2018-10-24 14:00:38,095 INFO L78 Accepts]: Start accepts. Automaton has 11031 states and 11692 transitions. Word has length 325 [2018-10-24 14:00:38,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:00:38,096 INFO L481 AbstractCegarLoop]: Abstraction has 11031 states and 11692 transitions. [2018-10-24 14:00:38,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 14:00:38,096 INFO L276 IsEmpty]: Start isEmpty. Operand 11031 states and 11692 transitions. [2018-10-24 14:00:38,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2018-10-24 14:00:38,102 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:00:38,103 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 14:00:38,103 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:00:38,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:00:38,104 INFO L82 PathProgramCache]: Analyzing trace with hash 625125048, now seen corresponding path program 1 times [2018-10-24 14:00:38,104 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:00:38,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:00:38,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:00:38,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:00:38,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:00:38,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:00:38,593 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-24 14:00:39,200 WARN L179 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2018-10-24 14:00:39,730 WARN L179 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2018-10-24 14:00:40,139 WARN L179 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2018-10-24 14:00:40,488 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 104 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:00:40,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:00:40,488 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:00:40,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:00:40,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:00:40,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:00:40,902 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-24 14:00:41,156 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-24 14:00:41,500 WARN L179 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 22 [2018-10-24 14:00:41,916 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 113 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:00:41,937 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 14:00:41,938 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2018-10-24 14:00:41,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-24 14:00:41,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-24 14:00:41,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-10-24 14:00:41,940 INFO L87 Difference]: Start difference. First operand 11031 states and 11692 transitions. Second operand 12 states. [2018-10-24 14:00:42,126 WARN L179 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2018-10-24 14:00:49,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:00:49,601 INFO L93 Difference]: Finished difference Result 22274 states and 23634 transitions. [2018-10-24 14:00:49,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-24 14:00:49,602 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 361 [2018-10-24 14:00:49,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:00:49,613 INFO L225 Difference]: With dead ends: 22274 [2018-10-24 14:00:49,613 INFO L226 Difference]: Without dead ends: 13116 [2018-10-24 14:00:49,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 357 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2018-10-24 14:00:49,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13116 states. [2018-10-24 14:00:49,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13116 to 11574. [2018-10-24 14:00:49,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11574 states. [2018-10-24 14:00:49,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11574 states to 11574 states and 12227 transitions. [2018-10-24 14:00:49,763 INFO L78 Accepts]: Start accepts. Automaton has 11574 states and 12227 transitions. Word has length 361 [2018-10-24 14:00:49,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:00:49,763 INFO L481 AbstractCegarLoop]: Abstraction has 11574 states and 12227 transitions. [2018-10-24 14:00:49,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-24 14:00:49,763 INFO L276 IsEmpty]: Start isEmpty. Operand 11574 states and 12227 transitions. [2018-10-24 14:00:49,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2018-10-24 14:00:49,778 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:00:49,778 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 14:00:49,778 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:00:49,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:00:49,779 INFO L82 PathProgramCache]: Analyzing trace with hash 888532162, now seen corresponding path program 1 times [2018-10-24 14:00:49,779 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:00:49,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:00:49,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:00:49,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:00:49,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:00:49,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:00:50,290 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 105 proven. 233 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:00:50,290 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:00:50,290 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 [2018-10-24 14:00:50,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:00:50,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:00:50,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:00:52,735 WARN L179 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 43 DAG size of output: 19 [2018-10-24 14:00:53,497 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 105 proven. 233 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:00:53,519 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 14:00:53,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2018-10-24 14:00:53,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 14:00:53,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 14:00:53,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=49, Unknown=1, NotChecked=0, Total=72 [2018-10-24 14:00:53,522 INFO L87 Difference]: Start difference. First operand 11574 states and 12227 transitions. Second operand 9 states. [2018-10-24 14:00:54,240 WARN L179 SmtUtils]: Spent 700.00 ms on a formula simplification that was a NOOP. DAG size: 20 Received shutdown request... [2018-10-24 14:03:16,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-24 14:03:16,298 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 14:03:16,304 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 14:03:16,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:03:16 BoogieIcfgContainer [2018-10-24 14:03:16,305 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 14:03:16,306 INFO L168 Benchmark]: Toolchain (without parser) took 247576.18 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 3.0 GB in the end (delta: -1.6 GB). Peak memory consumption was 434.6 MB. Max. memory is 7.1 GB. [2018-10-24 14:03:16,307 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. [2018-10-24 14:03:16,308 INFO L168 Benchmark]: CACSL2BoogieTranslator took 933.13 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. [2018-10-24 14:03:16,308 INFO L168 Benchmark]: Boogie Procedure Inliner took 271.98 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 752.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -846.7 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. [2018-10-24 14:03:16,309 INFO L168 Benchmark]: Boogie Preprocessor took 145.65 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 14:03:16,310 INFO L168 Benchmark]: RCFGBuilder took 4634.33 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 185.0 MB). Peak memory consumption was 185.0 MB. Max. memory is 7.1 GB. [2018-10-24 14:03:16,310 INFO L168 Benchmark]: TraceAbstraction took 241585.06 ms. Allocated memory was 2.3 GB in the beginning and 3.5 GB in the end (delta: 1.2 GB). Free memory was 2.0 GB in the beginning and 3.0 GB in the end (delta: -953.2 MB). Peak memory consumption was 280.5 MB. Max. memory is 7.1 GB. [2018-10-24 14:03:16,315 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 933.13 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 271.98 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 752.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -846.7 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 145.65 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 4634.33 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 185.0 MB). Peak memory consumption was 185.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 241585.06 ms. Allocated memory was 2.3 GB in the beginning and 3.5 GB in the end (delta: 1.2 GB). Free memory was 2.0 GB in the beginning and 3.0 GB in the end (delta: -953.2 MB). Peak memory consumption was 280.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 24]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 24). Cancelled while BasicCegarLoop was constructing difference of abstraction (11574states) and FLOYD_HOARE automaton (currently 12 states, 9 states before enhancement),while ReachableStatesComputation was computing reachable states (8784 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 284 locations, 1 error locations. TIMEOUT Result, 241.5s OverallTime, 17 OverallIterations, 4 TraceHistogramMax, 219.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3414 SDtfs, 15209 SDslu, 1973 SDs, 0 SdLazy, 34507 SolverSat, 6115 SolverUnsat, 179 SolverUnknown, 0 SolverNotchecked, 203.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1904 GetRequests, 1783 SyntacticMatches, 6 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 15.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16832occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.6s AutomataMinimizationTime, 16 MinimizatonAttempts, 22447 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 15.9s InterpolantComputationTime, 5581 NumberOfCodeBlocks, 5581 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 5558 ConstructedInterpolants, 527 QuantifiedInterpolants, 13468027 SizeOfPredicates, 14 NumberOfNonLiveVariables, 2436 ConjunctsInSsa, 58 ConjunctsInUnsatCore, 23 InterpolantComputations, 11 PerfectInterpolantSequences, 1890/3529 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown