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/Problem03_label33_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 18:53:59,754 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 18:53:59,756 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 18:53:59,775 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 18:53:59,776 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 18:53:59,777 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 18:53:59,779 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 18:53:59,781 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 18:53:59,783 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 18:53:59,785 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 18:53:59,786 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 18:53:59,787 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 18:53:59,789 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 18:53:59,792 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 18:53:59,800 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 18:53:59,801 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 18:53:59,801 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 18:53:59,806 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 18:53:59,808 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 18:53:59,814 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 18:53:59,815 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 18:53:59,817 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 18:53:59,821 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-23 18:53:59,821 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-23 18:53:59,821 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-23 18:53:59,822 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-23 18:53:59,823 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-23 18:53:59,825 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-23 18:53:59,825 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-23 18:53:59,826 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-23 18:53:59,826 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-23 18:53:59,830 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-23 18:53:59,834 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-23 18:53:59,859 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 18:53:59,859 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 18:53:59,860 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 18:53:59,860 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 18:53:59,861 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 18:53:59,861 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 18:53:59,861 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 18:53:59,862 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 18:53:59,862 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 18:53:59,862 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 18:53:59,862 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 18:53:59,862 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 18:53:59,863 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 18:53:59,863 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 18:53:59,863 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 18:53:59,863 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 18:53:59,863 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 18:53:59,863 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 18:53:59,864 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 18:53:59,864 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 18:53:59,864 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 18:53:59,864 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 18:53:59,864 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 18:53:59,865 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 18:53:59,865 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 18:53:59,865 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 18:53:59,865 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 18:53:59,865 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 18:53:59,929 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 18:53:59,940 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 18:53:59,944 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 18:53:59,945 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 18:53:59,946 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 18:53:59,947 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label33_true-unreach-call.c [2018-10-23 18:54:00,014 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/0beca1b25/a4e2d3a769ea4168861c400707a51902/FLAG17b2f0e08 [2018-10-23 18:54:00,699 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 18:54:00,700 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label33_true-unreach-call.c [2018-10-23 18:54:00,722 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/0beca1b25/a4e2d3a769ea4168861c400707a51902/FLAG17b2f0e08 [2018-10-23 18:54:00,737 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/0beca1b25/a4e2d3a769ea4168861c400707a51902 [2018-10-23 18:54:00,746 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 18:54:00,748 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 18:54:00,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 18:54:00,750 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 18:54:00,756 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 18:54:00,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:54:00" (1/1) ... [2018-10-23 18:54:00,760 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3236d4da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:54:00, skipping insertion in model container [2018-10-23 18:54:00,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:54:00" (1/1) ... [2018-10-23 18:54:00,771 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 18:54:00,860 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 18:54:01,585 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 18:54:01,591 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 18:54:01,890 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 18:54:01,912 INFO L193 MainTranslator]: Completed translation [2018-10-23 18:54:01,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:54:01 WrapperNode [2018-10-23 18:54:01,913 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 18:54:01,914 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 18:54:01,914 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 18:54:01,914 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 18:54:01,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:54:01" (1/1) ... [2018-10-23 18:54:01,962 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:54:01" (1/1) ... [2018-10-23 18:54:02,225 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 18:54:02,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 18:54:02,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 18:54:02,226 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 18:54:02,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:54:01" (1/1) ... [2018-10-23 18:54:02,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:54:01" (1/1) ... [2018-10-23 18:54:02,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:54:01" (1/1) ... [2018-10-23 18:54:02,248 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:54:01" (1/1) ... [2018-10-23 18:54:02,303 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:54:01" (1/1) ... [2018-10-23 18:54:02,318 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:54:01" (1/1) ... [2018-10-23 18:54:02,338 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:54:01" (1/1) ... [2018-10-23 18:54:02,354 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 18:54:02,355 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 18:54:02,355 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 18:54:02,355 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 18:54:02,356 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:54:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 18:54:02,425 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-23 18:54:02,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 18:54:02,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 18:54:07,839 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 18:54:07,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:54:07 BoogieIcfgContainer [2018-10-23 18:54:07,841 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 18:54:07,842 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 18:54:07,842 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 18:54:07,845 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 18:54:07,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:54:00" (1/3) ... [2018-10-23 18:54:07,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aa5beb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:54:07, skipping insertion in model container [2018-10-23 18:54:07,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:54:01" (2/3) ... [2018-10-23 18:54:07,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aa5beb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:54:07, skipping insertion in model container [2018-10-23 18:54:07,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:54:07" (3/3) ... [2018-10-23 18:54:07,849 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label33_true-unreach-call.c [2018-10-23 18:54:07,860 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 18:54:07,868 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 18:54:07,886 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 18:54:07,932 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 18:54:07,933 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 18:54:07,933 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 18:54:07,933 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 18:54:07,933 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 18:54:07,933 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 18:54:07,934 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 18:54:07,934 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 18:54:07,934 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 18:54:07,972 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states. [2018-10-23 18:54:07,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-23 18:54:07,995 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:54:07,996 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:54:07,999 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:54:08,004 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:54:08,004 INFO L82 PathProgramCache]: Analyzing trace with hash -38821388, now seen corresponding path program 1 times [2018-10-23 18:54:08,006 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:54:08,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:54:08,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:54:08,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:54:08,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:54:08,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:54:08,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:54:08,786 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:54:08,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-23 18:54:08,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 18:54:08,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 18:54:08,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 18:54:08,813 INFO L87 Difference]: Start difference. First operand 303 states. Second operand 3 states. [2018-10-23 18:54:10,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:54:10,849 INFO L93 Difference]: Finished difference Result 832 states and 1481 transitions. [2018-10-23 18:54:10,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 18:54:10,851 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 160 [2018-10-23 18:54:10,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:54:10,874 INFO L225 Difference]: With dead ends: 832 [2018-10-23 18:54:10,875 INFO L226 Difference]: Without dead ends: 525 [2018-10-23 18:54:10,880 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 [2018-10-23 18:54:10,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2018-10-23 18:54:10,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 511. [2018-10-23 18:54:10,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2018-10-23 18:54:10,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 878 transitions. [2018-10-23 18:54:10,969 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 878 transitions. Word has length 160 [2018-10-23 18:54:10,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:54:10,972 INFO L481 AbstractCegarLoop]: Abstraction has 511 states and 878 transitions. [2018-10-23 18:54:10,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 18:54:10,973 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 878 transitions. [2018-10-23 18:54:10,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-23 18:54:10,980 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:54:10,980 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:54:10,981 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:54:10,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:54:10,981 INFO L82 PathProgramCache]: Analyzing trace with hash -650574363, now seen corresponding path program 1 times [2018-10-23 18:54:10,981 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:54:10,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:54:10,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:54:10,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:54:10,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:54:11,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:54:11,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:54:11,293 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:54:11,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 18:54:11,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:54:11,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:54:11,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:54:11,298 INFO L87 Difference]: Start difference. First operand 511 states and 878 transitions. Second operand 4 states. [2018-10-23 18:54:16,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:54:16,084 INFO L93 Difference]: Finished difference Result 1892 states and 3348 transitions. [2018-10-23 18:54:16,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:54:16,086 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2018-10-23 18:54:16,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:54:16,097 INFO L225 Difference]: With dead ends: 1892 [2018-10-23 18:54:16,097 INFO L226 Difference]: Without dead ends: 1383 [2018-10-23 18:54:16,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:54:16,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2018-10-23 18:54:16,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 923. [2018-10-23 18:54:16,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 923 states. [2018-10-23 18:54:16,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1514 transitions. [2018-10-23 18:54:16,151 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1514 transitions. Word has length 166 [2018-10-23 18:54:16,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:54:16,151 INFO L481 AbstractCegarLoop]: Abstraction has 923 states and 1514 transitions. [2018-10-23 18:54:16,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:54:16,151 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1514 transitions. [2018-10-23 18:54:16,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-23 18:54:16,156 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:54:16,157 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:54:16,157 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:54:16,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:54:16,157 INFO L82 PathProgramCache]: Analyzing trace with hash -143747887, now seen corresponding path program 1 times [2018-10-23 18:54:16,158 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:54:16,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:54:16,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:54:16,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:54:16,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:54:16,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:54:16,287 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:54:16,287 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:54:16,287 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-23 18:54:16,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 18:54:16,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 18:54:16,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 18:54:16,289 INFO L87 Difference]: Start difference. First operand 923 states and 1514 transitions. Second operand 3 states. [2018-10-23 18:54:17,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:54:17,527 INFO L93 Difference]: Finished difference Result 1823 states and 2997 transitions. [2018-10-23 18:54:17,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 18:54:17,528 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 174 [2018-10-23 18:54:17,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:54:17,534 INFO L225 Difference]: With dead ends: 1823 [2018-10-23 18:54:17,534 INFO L226 Difference]: Without dead ends: 902 [2018-10-23 18:54:17,536 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 [2018-10-23 18:54:17,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2018-10-23 18:54:17,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 902. [2018-10-23 18:54:17,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 902 states. [2018-10-23 18:54:17,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1435 transitions. [2018-10-23 18:54:17,558 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1435 transitions. Word has length 174 [2018-10-23 18:54:17,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:54:17,558 INFO L481 AbstractCegarLoop]: Abstraction has 902 states and 1435 transitions. [2018-10-23 18:54:17,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 18:54:17,559 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1435 transitions. [2018-10-23 18:54:17,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-23 18:54:17,562 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:54:17,563 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:54:17,563 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:54:17,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:54:17,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1128783860, now seen corresponding path program 1 times [2018-10-23 18:54:17,563 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:54:17,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:54:17,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:54:17,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:54:17,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:54:17,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:54:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-23 18:54:17,678 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:54:17,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 18:54:17,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:54:17,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:54:17,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:54:17,679 INFO L87 Difference]: Start difference. First operand 902 states and 1435 transitions. Second operand 4 states. [2018-10-23 18:54:19,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:54:19,863 INFO L93 Difference]: Finished difference Result 3476 states and 5598 transitions. [2018-10-23 18:54:19,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:54:19,863 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 176 [2018-10-23 18:54:19,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:54:19,878 INFO L225 Difference]: With dead ends: 3476 [2018-10-23 18:54:19,878 INFO L226 Difference]: Without dead ends: 2576 [2018-10-23 18:54:19,881 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 [2018-10-23 18:54:19,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2018-10-23 18:54:19,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 1723. [2018-10-23 18:54:19,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1723 states. [2018-10-23 18:54:19,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 2603 transitions. [2018-10-23 18:54:19,932 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 2603 transitions. Word has length 176 [2018-10-23 18:54:19,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:54:19,932 INFO L481 AbstractCegarLoop]: Abstraction has 1723 states and 2603 transitions. [2018-10-23 18:54:19,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:54:19,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 2603 transitions. [2018-10-23 18:54:19,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-23 18:54:19,939 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:54:19,940 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:54:19,940 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:54:19,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:54:19,940 INFO L82 PathProgramCache]: Analyzing trace with hash -877984136, now seen corresponding path program 1 times [2018-10-23 18:54:19,941 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:54:19,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:54:19,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:54:19,942 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:54:19,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:54:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:54:20,107 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-23 18:54:20,107 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:54:20,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-23 18:54:20,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 18:54:20,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 18:54:20,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 18:54:20,109 INFO L87 Difference]: Start difference. First operand 1723 states and 2603 transitions. Second operand 3 states. [2018-10-23 18:54:20,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:54:20,868 INFO L93 Difference]: Finished difference Result 5159 states and 7797 transitions. [2018-10-23 18:54:20,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 18:54:20,872 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 183 [2018-10-23 18:54:20,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:54:20,887 INFO L225 Difference]: With dead ends: 5159 [2018-10-23 18:54:20,888 INFO L226 Difference]: Without dead ends: 3438 [2018-10-23 18:54:20,890 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 [2018-10-23 18:54:20,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3438 states. [2018-10-23 18:54:20,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3438 to 3436. [2018-10-23 18:54:20,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3436 states. [2018-10-23 18:54:20,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3436 states to 3436 states and 5189 transitions. [2018-10-23 18:54:20,969 INFO L78 Accepts]: Start accepts. Automaton has 3436 states and 5189 transitions. Word has length 183 [2018-10-23 18:54:20,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:54:20,970 INFO L481 AbstractCegarLoop]: Abstraction has 3436 states and 5189 transitions. [2018-10-23 18:54:20,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 18:54:20,970 INFO L276 IsEmpty]: Start isEmpty. Operand 3436 states and 5189 transitions. [2018-10-23 18:54:20,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-23 18:54:20,976 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:54:20,977 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:54:20,977 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:54:20,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:54:20,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1434791920, now seen corresponding path program 1 times [2018-10-23 18:54:20,978 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:54:20,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:54:20,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:54:20,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:54:20,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:54:21,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:54:21,185 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:54:21,185 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:54:21,185 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:54:21,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 18:54:21,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 18:54:21,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 18:54:21,187 INFO L87 Difference]: Start difference. First operand 3436 states and 5189 transitions. Second operand 5 states. [2018-10-23 18:54:24,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:54:24,593 INFO L93 Difference]: Finished difference Result 7939 states and 12127 transitions. [2018-10-23 18:54:24,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 18:54:24,594 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 200 [2018-10-23 18:54:24,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:54:24,610 INFO L225 Difference]: With dead ends: 7939 [2018-10-23 18:54:24,611 INFO L226 Difference]: Without dead ends: 4505 [2018-10-23 18:54:24,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 18:54:24,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4505 states. [2018-10-23 18:54:24,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4505 to 3640. [2018-10-23 18:54:24,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3640 states. [2018-10-23 18:54:24,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3640 states to 3640 states and 5424 transitions. [2018-10-23 18:54:24,691 INFO L78 Accepts]: Start accepts. Automaton has 3640 states and 5424 transitions. Word has length 200 [2018-10-23 18:54:24,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:54:24,691 INFO L481 AbstractCegarLoop]: Abstraction has 3640 states and 5424 transitions. [2018-10-23 18:54:24,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 18:54:24,692 INFO L276 IsEmpty]: Start isEmpty. Operand 3640 states and 5424 transitions. [2018-10-23 18:54:24,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-23 18:54:24,698 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:54:24,698 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:54:24,698 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:54:24,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:54:24,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1631129756, now seen corresponding path program 1 times [2018-10-23 18:54:24,699 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:54:24,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:54:24,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:54:24,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:54:24,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:54:24,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:54:24,897 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:54:24,897 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:54:24,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-23 18:54:24,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 18:54:24,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 18:54:24,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 18:54:24,899 INFO L87 Difference]: Start difference. First operand 3640 states and 5424 transitions. Second operand 3 states. [2018-10-23 18:54:26,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:54:26,533 INFO L93 Difference]: Finished difference Result 8933 states and 13269 transitions. [2018-10-23 18:54:26,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 18:54:26,536 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 202 [2018-10-23 18:54:26,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:54:26,556 INFO L225 Difference]: With dead ends: 8933 [2018-10-23 18:54:26,556 INFO L226 Difference]: Without dead ends: 5295 [2018-10-23 18:54:26,562 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 [2018-10-23 18:54:26,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5295 states. [2018-10-23 18:54:26,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5295 to 5293. [2018-10-23 18:54:26,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5293 states. [2018-10-23 18:54:26,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5293 states to 5293 states and 7795 transitions. [2018-10-23 18:54:26,653 INFO L78 Accepts]: Start accepts. Automaton has 5293 states and 7795 transitions. Word has length 202 [2018-10-23 18:54:26,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:54:26,654 INFO L481 AbstractCegarLoop]: Abstraction has 5293 states and 7795 transitions. [2018-10-23 18:54:26,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 18:54:26,654 INFO L276 IsEmpty]: Start isEmpty. Operand 5293 states and 7795 transitions. [2018-10-23 18:54:26,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-10-23 18:54:26,662 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:54:26,662 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:54:26,662 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:54:26,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:54:26,663 INFO L82 PathProgramCache]: Analyzing trace with hash -104078832, now seen corresponding path program 1 times [2018-10-23 18:54:26,663 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:54:26,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:54:26,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:54:26,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:54:26,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:54:26,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:54:27,199 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 9 [2018-10-23 18:54:27,240 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 52 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:54:27,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:54:27,241 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 18:54:27,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:54:27,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:54:27,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:54:27,535 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-23 18:54:27,571 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:54:27,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2018-10-23 18:54:27,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 18:54:27,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 18:54:27,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-10-23 18:54:27,576 INFO L87 Difference]: Start difference. First operand 5293 states and 7795 transitions. Second operand 7 states. [2018-10-23 18:54:27,744 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-23 18:54:37,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:54:37,195 INFO L93 Difference]: Finished difference Result 28244 states and 40515 transitions. [2018-10-23 18:54:37,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-23 18:54:37,197 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 210 [2018-10-23 18:54:37,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:54:37,261 INFO L225 Difference]: With dead ends: 28244 [2018-10-23 18:54:37,261 INFO L226 Difference]: Without dead ends: 22953 [2018-10-23 18:54:37,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-10-23 18:54:37,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22953 states. [2018-10-23 18:54:37,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22953 to 22932. [2018-10-23 18:54:37,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22932 states. [2018-10-23 18:54:37,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22932 states to 22932 states and 28766 transitions. [2018-10-23 18:54:37,723 INFO L78 Accepts]: Start accepts. Automaton has 22932 states and 28766 transitions. Word has length 210 [2018-10-23 18:54:37,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:54:37,723 INFO L481 AbstractCegarLoop]: Abstraction has 22932 states and 28766 transitions. [2018-10-23 18:54:37,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 18:54:37,724 INFO L276 IsEmpty]: Start isEmpty. Operand 22932 states and 28766 transitions. [2018-10-23 18:54:37,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2018-10-23 18:54:37,750 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:54:37,750 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:54:37,751 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:54:37,751 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:54:37,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1001781086, now seen corresponding path program 1 times [2018-10-23 18:54:37,751 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:54:37,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:54:37,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:54:37,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:54:37,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:54:37,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:54:37,869 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-10-23 18:54:37,869 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:54:37,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 18:54:37,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 18:54:37,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 18:54:37,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 18:54:37,872 INFO L87 Difference]: Start difference. First operand 22932 states and 28766 transitions. Second operand 3 states. [2018-10-23 18:54:40,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:54:40,011 INFO L93 Difference]: Finished difference Result 64222 states and 80670 transitions. [2018-10-23 18:54:40,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 18:54:40,011 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 239 [2018-10-23 18:54:40,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:54:40,097 INFO L225 Difference]: With dead ends: 64222 [2018-10-23 18:54:40,097 INFO L226 Difference]: Without dead ends: 41292 [2018-10-23 18:54:40,127 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 18:54:40,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41292 states. [2018-10-23 18:54:40,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41292 to 41290. [2018-10-23 18:54:40,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41290 states. [2018-10-23 18:54:40,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41290 states to 41290 states and 49438 transitions. [2018-10-23 18:54:40,711 INFO L78 Accepts]: Start accepts. Automaton has 41290 states and 49438 transitions. Word has length 239 [2018-10-23 18:54:40,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:54:40,711 INFO L481 AbstractCegarLoop]: Abstraction has 41290 states and 49438 transitions. [2018-10-23 18:54:40,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 18:54:40,711 INFO L276 IsEmpty]: Start isEmpty. Operand 41290 states and 49438 transitions. [2018-10-23 18:54:40,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-10-23 18:54:40,754 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:54:40,755 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:54:40,755 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:54:40,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:54:40,756 INFO L82 PathProgramCache]: Analyzing trace with hash 2047623181, now seen corresponding path program 1 times [2018-10-23 18:54:40,756 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:54:40,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:54:40,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:54:40,757 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:54:40,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:54:40,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:54:41,044 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 105 proven. 8 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-10-23 18:54:41,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:54:41,045 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 18:54:41,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:54:41,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:54:41,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:54:41,295 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-10-23 18:54:41,329 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:54:41,330 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-10-23 18:54:41,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 18:54:41,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 18:54:41,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 18:54:41,331 INFO L87 Difference]: Start difference. First operand 41290 states and 49438 transitions. Second operand 5 states. [2018-10-23 18:54:44,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:54:44,472 INFO L93 Difference]: Finished difference Result 102771 states and 126323 transitions. [2018-10-23 18:54:44,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:54:44,473 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 252 [2018-10-23 18:54:44,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:54:44,568 INFO L225 Difference]: With dead ends: 102771 [2018-10-23 18:54:44,568 INFO L226 Difference]: Without dead ends: 61483 [2018-10-23 18:54:44,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 252 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 18:54:44,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61483 states. [2018-10-23 18:54:45,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61483 to 60663. [2018-10-23 18:54:45,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60663 states. [2018-10-23 18:54:45,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60663 states to 60663 states and 71369 transitions. [2018-10-23 18:54:45,428 INFO L78 Accepts]: Start accepts. Automaton has 60663 states and 71369 transitions. Word has length 252 [2018-10-23 18:54:45,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:54:45,429 INFO L481 AbstractCegarLoop]: Abstraction has 60663 states and 71369 transitions. [2018-10-23 18:54:45,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 18:54:45,429 INFO L276 IsEmpty]: Start isEmpty. Operand 60663 states and 71369 transitions. [2018-10-23 18:54:45,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2018-10-23 18:54:45,524 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:54:45,524 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:54:45,526 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:54:45,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:54:45,526 INFO L82 PathProgramCache]: Analyzing trace with hash -71420173, now seen corresponding path program 1 times [2018-10-23 18:54:45,526 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:54:45,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:54:45,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:54:45,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:54:45,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:54:45,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:54:45,880 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 262 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2018-10-23 18:54:45,880 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:54:45,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 18:54:45,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 18:54:45,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 18:54:45,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 18:54:45,882 INFO L87 Difference]: Start difference. First operand 60663 states and 71369 transitions. Second operand 3 states. [2018-10-23 18:54:47,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:54:47,978 INFO L93 Difference]: Finished difference Result 118873 states and 139768 transitions. [2018-10-23 18:54:47,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 18:54:47,978 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 360 [2018-10-23 18:54:47,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:54:48,043 INFO L225 Difference]: With dead ends: 118873 [2018-10-23 18:54:48,043 INFO L226 Difference]: Without dead ends: 58212 [2018-10-23 18:54:48,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 18:54:48,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58212 states. [2018-10-23 18:54:48,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58212 to 58004. [2018-10-23 18:54:48,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58004 states. [2018-10-23 18:54:48,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58004 states to 58004 states and 65746 transitions. [2018-10-23 18:54:48,813 INFO L78 Accepts]: Start accepts. Automaton has 58004 states and 65746 transitions. Word has length 360 [2018-10-23 18:54:48,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:54:48,814 INFO L481 AbstractCegarLoop]: Abstraction has 58004 states and 65746 transitions. [2018-10-23 18:54:48,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 18:54:48,814 INFO L276 IsEmpty]: Start isEmpty. Operand 58004 states and 65746 transitions. [2018-10-23 18:54:48,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2018-10-23 18:54:48,853 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:54:48,853 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 6, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:54:48,854 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:54:48,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:54:48,854 INFO L82 PathProgramCache]: Analyzing trace with hash -114182876, now seen corresponding path program 2 times [2018-10-23 18:54:48,854 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:54:48,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:54:48,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:54:48,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:54:48,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:54:48,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:54:49,109 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2018-10-23 18:54:49,110 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:54:49,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 18:54:49,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:54:49,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:54:49,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:54:49,111 INFO L87 Difference]: Start difference. First operand 58004 states and 65746 transitions. Second operand 4 states. [2018-10-23 18:54:52,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:54:52,236 INFO L93 Difference]: Finished difference Result 211301 states and 238015 transitions. [2018-10-23 18:54:52,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:54:52,236 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 373 [2018-10-23 18:54:52,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:54:52,468 INFO L225 Difference]: With dead ends: 211301 [2018-10-23 18:54:52,469 INFO L226 Difference]: Without dead ends: 153299 [2018-10-23 18:54:52,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:54:52,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153299 states. [2018-10-23 18:54:54,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153299 to 153295. [2018-10-23 18:54:54,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153295 states. [2018-10-23 18:54:55,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153295 states to 153295 states and 171946 transitions. [2018-10-23 18:54:55,043 INFO L78 Accepts]: Start accepts. Automaton has 153295 states and 171946 transitions. Word has length 373 [2018-10-23 18:54:55,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:54:55,044 INFO L481 AbstractCegarLoop]: Abstraction has 153295 states and 171946 transitions. [2018-10-23 18:54:55,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:54:55,044 INFO L276 IsEmpty]: Start isEmpty. Operand 153295 states and 171946 transitions. [2018-10-23 18:54:55,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2018-10-23 18:54:55,149 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:54:55,149 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-23 18:54:55,150 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:54:55,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:54:55,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1003386127, now seen corresponding path program 1 times [2018-10-23 18:54:55,150 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:54:55,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:54:55,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:54:55,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 18:54:55,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:54:55,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:54:55,642 WARN L179 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 8 [2018-10-23 18:54:56,719 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2018-10-23 18:54:56,719 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:54:56,719 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:54:56,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:54:56,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:54:56,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:54:56,721 INFO L87 Difference]: Start difference. First operand 153295 states and 171946 transitions. Second operand 4 states. [2018-10-23 18:55:00,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:55:00,731 INFO L93 Difference]: Finished difference Result 304194 states and 340964 transitions. [2018-10-23 18:55:00,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:55:00,731 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 536 [2018-10-23 18:55:00,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:55:00,934 INFO L225 Difference]: With dead ends: 304194 [2018-10-23 18:55:00,935 INFO L226 Difference]: Without dead ends: 150901 [2018-10-23 18:55:01,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:55:01,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150901 states. [2018-10-23 18:55:02,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150901 to 146561. [2018-10-23 18:55:02,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146561 states. [2018-10-23 18:55:03,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146561 states to 146561 states and 163713 transitions. [2018-10-23 18:55:03,225 INFO L78 Accepts]: Start accepts. Automaton has 146561 states and 163713 transitions. Word has length 536 [2018-10-23 18:55:03,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:55:03,226 INFO L481 AbstractCegarLoop]: Abstraction has 146561 states and 163713 transitions. [2018-10-23 18:55:03,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:55:03,226 INFO L276 IsEmpty]: Start isEmpty. Operand 146561 states and 163713 transitions. [2018-10-23 18:55:03,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2018-10-23 18:55:03,357 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:55:03,358 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-23 18:55:03,358 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:55:03,358 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:55:03,361 INFO L82 PathProgramCache]: Analyzing trace with hash -237916135, now seen corresponding path program 1 times [2018-10-23 18:55:03,361 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:55:03,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:55:03,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:55:03,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:55:03,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:55:03,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:55:04,917 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 245 proven. 0 refuted. 0 times theorem prover too weak. 712 trivial. 0 not checked. [2018-10-23 18:55:04,918 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:55:04,918 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 18:55:04,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:55:04,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:55:04,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:55:04,919 INFO L87 Difference]: Start difference. First operand 146561 states and 163713 transitions. Second operand 4 states. [2018-10-23 18:55:08,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:55:08,667 INFO L93 Difference]: Finished difference Result 414764 states and 462298 transitions. [2018-10-23 18:55:08,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:55:08,667 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 542 [2018-10-23 18:55:08,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:55:08,941 INFO L225 Difference]: With dead ends: 414764 [2018-10-23 18:55:08,941 INFO L226 Difference]: Without dead ends: 268205 [2018-10-23 18:55:09,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:55:09,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268205 states. [2018-10-23 18:55:12,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268205 to 267179. [2018-10-23 18:55:12,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267179 states. [2018-10-23 18:55:12,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267179 states to 267179 states and 294850 transitions. [2018-10-23 18:55:12,770 INFO L78 Accepts]: Start accepts. Automaton has 267179 states and 294850 transitions. Word has length 542 [2018-10-23 18:55:12,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:55:12,770 INFO L481 AbstractCegarLoop]: Abstraction has 267179 states and 294850 transitions. [2018-10-23 18:55:12,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:55:12,770 INFO L276 IsEmpty]: Start isEmpty. Operand 267179 states and 294850 transitions. [2018-10-23 18:55:12,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 622 [2018-10-23 18:55:12,884 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:55:12,885 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:55:12,885 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:55:12,886 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:55:12,886 INFO L82 PathProgramCache]: Analyzing trace with hash 696758080, now seen corresponding path program 1 times [2018-10-23 18:55:12,886 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:55:12,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:55:12,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:55:12,887 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:55:12,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:55:12,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:55:14,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1310 backedges. 345 proven. 0 refuted. 0 times theorem prover too weak. 965 trivial. 0 not checked. [2018-10-23 18:55:14,521 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:55:14,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 18:55:14,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 18:55:14,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 18:55:14,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 18:55:14,523 INFO L87 Difference]: Start difference. First operand 267179 states and 294850 transitions. Second operand 3 states. [2018-10-23 18:55:18,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:55:18,118 INFO L93 Difference]: Finished difference Result 495325 states and 546731 transitions. [2018-10-23 18:55:18,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 18:55:18,118 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 621 [2018-10-23 18:55:18,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:55:18,445 INFO L225 Difference]: With dead ends: 495325 [2018-10-23 18:55:18,445 INFO L226 Difference]: Without dead ends: 228352 [2018-10-23 18:55:18,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 18:55:18,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228352 states. [2018-10-23 18:55:21,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228352 to 228318. [2018-10-23 18:55:21,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228318 states. [2018-10-23 18:55:22,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228318 states to 228318 states and 249523 transitions. [2018-10-23 18:55:22,173 INFO L78 Accepts]: Start accepts. Automaton has 228318 states and 249523 transitions. Word has length 621 [2018-10-23 18:55:22,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:55:22,173 INFO L481 AbstractCegarLoop]: Abstraction has 228318 states and 249523 transitions. [2018-10-23 18:55:22,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 18:55:22,173 INFO L276 IsEmpty]: Start isEmpty. Operand 228318 states and 249523 transitions. [2018-10-23 18:55:22,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 666 [2018-10-23 18:55:22,277 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:55:22,278 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:55:22,278 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:55:22,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:55:22,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1033170859, now seen corresponding path program 1 times [2018-10-23 18:55:22,278 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:55:22,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:55:22,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:55:22,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:55:22,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:55:22,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:55:22,980 WARN L179 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2018-10-23 18:55:23,435 WARN L179 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 11 [2018-10-23 18:55:23,968 WARN L179 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 12 [2018-10-23 18:55:24,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1471 backedges. 503 proven. 10 refuted. 0 times theorem prover too weak. 958 trivial. 0 not checked. [2018-10-23 18:55:24,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:55:24,858 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 18:55:24,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:55:25,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:55:25,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:55:25,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1471 backedges. 657 proven. 0 refuted. 0 times theorem prover too weak. 814 trivial. 0 not checked. [2018-10-23 18:55:25,750 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:55:25,750 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2018-10-23 18:55:25,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-23 18:55:25,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-23 18:55:25,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-23 18:55:25,752 INFO L87 Difference]: Start difference. First operand 228318 states and 249523 transitions. Second operand 8 states. [2018-10-23 18:55:26,086 WARN L179 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2018-10-23 18:55:42,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:55:42,375 INFO L93 Difference]: Finished difference Result 1334451 states and 1450311 transitions. [2018-10-23 18:55:42,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-23 18:55:42,375 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 665 [2018-10-23 18:55:42,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:55:43,944 INFO L225 Difference]: With dead ends: 1334451 [2018-10-23 18:55:43,944 INFO L226 Difference]: Without dead ends: 1106953 [2018-10-23 18:55:44,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 664 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2018-10-23 18:55:44,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106953 states. [2018-10-23 18:55:57,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106953 to 746812. [2018-10-23 18:55:57,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 746812 states. [2018-10-23 18:55:57,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746812 states to 746812 states and 807402 transitions. [2018-10-23 18:55:57,869 INFO L78 Accepts]: Start accepts. Automaton has 746812 states and 807402 transitions. Word has length 665 [2018-10-23 18:55:57,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:55:57,869 INFO L481 AbstractCegarLoop]: Abstraction has 746812 states and 807402 transitions. [2018-10-23 18:55:57,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-23 18:55:57,870 INFO L276 IsEmpty]: Start isEmpty. Operand 746812 states and 807402 transitions. [2018-10-23 18:56:00,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 769 [2018-10-23 18:56:00,142 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:56:00,143 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:56:00,143 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:56:00,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:56:00,144 INFO L82 PathProgramCache]: Analyzing trace with hash 471337485, now seen corresponding path program 1 times [2018-10-23 18:56:00,144 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:56:00,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:56:00,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:56:00,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:56:00,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:56:00,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:56:00,566 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-23 18:56:00,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1945 backedges. 282 proven. 4 refuted. 0 times theorem prover too weak. 1659 trivial. 0 not checked. [2018-10-23 18:56:00,963 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:56:00,964 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 18:56:07,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:56:07,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:56:07,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:56:07,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1945 backedges. 992 proven. 0 refuted. 0 times theorem prover too weak. 953 trivial. 0 not checked. [2018-10-23 18:56:07,815 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:56:07,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2018-10-23 18:56:07,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 18:56:07,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 18:56:07,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-23 18:56:07,817 INFO L87 Difference]: Start difference. First operand 746812 states and 807402 transitions. Second operand 6 states. [2018-10-23 18:56:07,941 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-10-23 18:56:28,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:56:28,172 INFO L93 Difference]: Finished difference Result 3244621 states and 3499012 transitions. [2018-10-23 18:56:28,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-23 18:56:28,173 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 768 [2018-10-23 18:56:28,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:56:34,112 INFO L225 Difference]: With dead ends: 3244621 [2018-10-23 18:56:34,112 INFO L226 Difference]: Without dead ends: 2498629 [2018-10-23 18:56:34,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 767 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-10-23 18:56:36,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498629 states. Received shutdown request...