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_label39_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 13:17:13,008 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 13:17:13,013 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 13:17:13,030 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 13:17:13,030 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 13:17:13,032 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 13:17:13,034 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 13:17:13,036 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 13:17:13,038 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 13:17:13,039 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 13:17:13,047 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 13:17:13,048 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 13:17:13,049 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 13:17:13,050 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 13:17:13,053 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 13:17:13,054 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 13:17:13,055 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 13:17:13,060 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 13:17:13,064 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 13:17:13,066 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 13:17:13,067 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 13:17:13,068 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 13:17:13,070 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 13:17:13,078 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-24 13:17:13,093 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 13:17:13,093 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 13:17:13,094 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 13:17:13,094 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 13:17:13,095 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 13:17:13,095 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 13:17:13,095 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 13:17:13,095 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 13:17:13,096 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 13:17:13,096 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 13:17:13,096 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 13:17:13,096 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 13:17:13,096 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 13:17:13,097 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 13:17:13,097 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 13:17:13,097 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 13:17:13,097 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 13:17:13,097 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 13:17:13,098 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 13:17:13,098 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 13:17:13,098 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 13:17:13,098 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 13:17:13,099 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 13:17:13,099 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 13:17:13,099 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 13:17:13,099 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 13:17:13,099 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 13:17:13,099 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 13:17:13,149 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 13:17:13,162 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 13:17:13,165 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 13:17:13,167 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 13:17:13,167 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 13:17:13,168 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label39_false-unreach-call.c [2018-10-24 13:17:13,227 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5ab14f0be/1fbc30f909cc4c34a331ca634f0fdf7c/FLAGc3361a3f5 [2018-10-24 13:17:13,886 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 13:17:13,888 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label39_false-unreach-call.c [2018-10-24 13:17:13,909 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5ab14f0be/1fbc30f909cc4c34a331ca634f0fdf7c/FLAGc3361a3f5 [2018-10-24 13:17:13,924 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5ab14f0be/1fbc30f909cc4c34a331ca634f0fdf7c [2018-10-24 13:17:13,937 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 13:17:13,938 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 13:17:13,939 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 13:17:13,940 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 13:17:13,944 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 13:17:13,945 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 01:17:13" (1/1) ... [2018-10-24 13:17:13,948 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68109397 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:17:13, skipping insertion in model container [2018-10-24 13:17:13,948 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 01:17:13" (1/1) ... [2018-10-24 13:17:13,959 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 13:17:14,057 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 13:17:14,866 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 13:17:14,872 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 13:17:15,174 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 13:17:15,195 INFO L193 MainTranslator]: Completed translation [2018-10-24 13:17:15,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:17:15 WrapperNode [2018-10-24 13:17:15,196 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 13:17:15,197 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 13:17:15,197 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 13:17:15,197 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 13:17:15,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:17:15" (1/1) ... [2018-10-24 13:17:15,240 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:17:15" (1/1) ... [2018-10-24 13:17:15,501 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 13:17:15,502 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 13:17:15,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 13:17:15,502 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 13:17:15,514 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:17:15" (1/1) ... [2018-10-24 13:17:15,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:17:15" (1/1) ... [2018-10-24 13:17:15,529 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:17:15" (1/1) ... [2018-10-24 13:17:15,530 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:17:15" (1/1) ... [2018-10-24 13:17:15,578 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:17:15" (1/1) ... [2018-10-24 13:17:15,601 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:17:15" (1/1) ... [2018-10-24 13:17:15,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:17:15" (1/1) ... [2018-10-24 13:17:15,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 13:17:15,631 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 13:17:15,631 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 13:17:15,631 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 13:17:15,632 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:17:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 13:17:15,697 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 13:17:15,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 13:17:15,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 13:17:21,614 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 13:17:21,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 01:17:21 BoogieIcfgContainer [2018-10-24 13:17:21,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 13:17:21,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 13:17:21,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 13:17:21,620 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 13:17:21,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 01:17:13" (1/3) ... [2018-10-24 13:17:21,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51e4afdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 01:17:21, skipping insertion in model container [2018-10-24 13:17:21,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:17:15" (2/3) ... [2018-10-24 13:17:21,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51e4afdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 01:17:21, skipping insertion in model container [2018-10-24 13:17:21,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 01:17:21" (3/3) ... [2018-10-24 13:17:21,624 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label39_false-unreach-call.c [2018-10-24 13:17:21,634 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 13:17:21,643 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 13:17:21,661 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 13:17:21,698 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 13:17:21,699 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 13:17:21,699 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 13:17:21,699 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 13:17:21,699 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 13:17:21,700 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 13:17:21,700 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 13:17:21,700 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 13:17:21,700 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 13:17:21,725 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states. [2018-10-24 13:17:21,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-24 13:17:21,743 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:17:21,744 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] [2018-10-24 13:17:21,746 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:17:21,752 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:17:21,753 INFO L82 PathProgramCache]: Analyzing trace with hash 501319492, now seen corresponding path program 1 times [2018-10-24 13:17:21,755 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:17:21,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:17:21,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:21,808 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:17:21,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:22,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:17:22,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 13:17:22,664 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 13:17:22,664 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 13:17:22,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 13:17:22,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 13:17:22,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 13:17:22,690 INFO L87 Difference]: Start difference. First operand 303 states. Second operand 4 states. [2018-10-24 13:17:25,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:17:25,871 INFO L93 Difference]: Finished difference Result 1089 states and 1954 transitions. [2018-10-24 13:17:25,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 13:17:25,873 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 148 [2018-10-24 13:17:25,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:17:25,905 INFO L225 Difference]: With dead ends: 1089 [2018-10-24 13:17:25,905 INFO L226 Difference]: Without dead ends: 779 [2018-10-24 13:17:25,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 13:17:25,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2018-10-24 13:17:26,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 515. [2018-10-24 13:17:26,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 515 states. [2018-10-24 13:17:26,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 887 transitions. [2018-10-24 13:17:26,019 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 887 transitions. Word has length 148 [2018-10-24 13:17:26,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:17:26,021 INFO L481 AbstractCegarLoop]: Abstraction has 515 states and 887 transitions. [2018-10-24 13:17:26,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 13:17:26,021 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 887 transitions. [2018-10-24 13:17:26,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-24 13:17:26,025 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:17:26,026 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] [2018-10-24 13:17:26,026 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:17:26,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:17:26,027 INFO L82 PathProgramCache]: Analyzing trace with hash 653561013, now seen corresponding path program 1 times [2018-10-24 13:17:26,027 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:17:26,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:17:26,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:26,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:17:26,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:26,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:17:26,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 13:17:26,406 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 13:17:26,406 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 13:17:26,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 13:17:26,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 13:17:26,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 13:17:26,409 INFO L87 Difference]: Start difference. First operand 515 states and 887 transitions. Second operand 4 states. [2018-10-24 13:17:31,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:17:31,455 INFO L93 Difference]: Finished difference Result 1903 states and 3379 transitions. [2018-10-24 13:17:31,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 13:17:31,456 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2018-10-24 13:17:31,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:17:31,464 INFO L225 Difference]: With dead ends: 1903 [2018-10-24 13:17:31,465 INFO L226 Difference]: Without dead ends: 1390 [2018-10-24 13:17:31,468 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 [2018-10-24 13:17:31,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2018-10-24 13:17:31,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 927. [2018-10-24 13:17:31,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 927 states. [2018-10-24 13:17:31,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1521 transitions. [2018-10-24 13:17:31,505 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1521 transitions. Word has length 154 [2018-10-24 13:17:31,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:17:31,505 INFO L481 AbstractCegarLoop]: Abstraction has 927 states and 1521 transitions. [2018-10-24 13:17:31,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 13:17:31,505 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1521 transitions. [2018-10-24 13:17:31,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-24 13:17:31,511 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:17:31,511 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 13:17:31,512 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:17:31,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:17:31,512 INFO L82 PathProgramCache]: Analyzing trace with hash -379248445, now seen corresponding path program 1 times [2018-10-24 13:17:31,512 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:17:31,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:17:31,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:31,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:17:31,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:31,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:17:31,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 13:17:31,638 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 13:17:31,639 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 13:17:31,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 13:17:31,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 13:17:31,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 13:17:31,643 INFO L87 Difference]: Start difference. First operand 927 states and 1521 transitions. Second operand 3 states. [2018-10-24 13:17:33,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:17:33,571 INFO L93 Difference]: Finished difference Result 2684 states and 4465 transitions. [2018-10-24 13:17:33,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 13:17:33,572 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 157 [2018-10-24 13:17:33,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:17:33,582 INFO L225 Difference]: With dead ends: 2684 [2018-10-24 13:17:33,582 INFO L226 Difference]: Without dead ends: 1759 [2018-10-24 13:17:33,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 13:17:33,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2018-10-24 13:17:33,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1744. [2018-10-24 13:17:33,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1744 states. [2018-10-24 13:17:33,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 2808 transitions. [2018-10-24 13:17:33,622 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 2808 transitions. Word has length 157 [2018-10-24 13:17:33,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:17:33,622 INFO L481 AbstractCegarLoop]: Abstraction has 1744 states and 2808 transitions. [2018-10-24 13:17:33,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 13:17:33,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 2808 transitions. [2018-10-24 13:17:33,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-24 13:17:33,627 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:17:33,627 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 13:17:33,627 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:17:33,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:17:33,628 INFO L82 PathProgramCache]: Analyzing trace with hash 880913707, now seen corresponding path program 1 times [2018-10-24 13:17:33,628 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:17:33,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:17:33,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:33,629 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:17:33,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:33,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:17:33,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 13:17:33,866 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 13:17:33,866 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 13:17:33,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 13:17:33,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 13:17:33,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 13:17:33,868 INFO L87 Difference]: Start difference. First operand 1744 states and 2808 transitions. Second operand 4 states. [2018-10-24 13:17:36,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:17:36,542 INFO L93 Difference]: Finished difference Result 6800 states and 11033 transitions. [2018-10-24 13:17:36,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 13:17:36,543 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 158 [2018-10-24 13:17:36,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:17:36,570 INFO L225 Difference]: With dead ends: 6800 [2018-10-24 13:17:36,571 INFO L226 Difference]: Without dead ends: 5058 [2018-10-24 13:17:36,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 13:17:36,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5058 states. [2018-10-24 13:17:36,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5058 to 3383. [2018-10-24 13:17:36,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3383 states. [2018-10-24 13:17:36,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3383 states to 3383 states and 5097 transitions. [2018-10-24 13:17:36,652 INFO L78 Accepts]: Start accepts. Automaton has 3383 states and 5097 transitions. Word has length 158 [2018-10-24 13:17:36,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:17:36,653 INFO L481 AbstractCegarLoop]: Abstraction has 3383 states and 5097 transitions. [2018-10-24 13:17:36,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 13:17:36,653 INFO L276 IsEmpty]: Start isEmpty. Operand 3383 states and 5097 transitions. [2018-10-24 13:17:36,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-24 13:17:36,659 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:17:36,659 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 13:17:36,659 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:17:36,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:17:36,660 INFO L82 PathProgramCache]: Analyzing trace with hash 629616030, now seen corresponding path program 1 times [2018-10-24 13:17:36,660 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:17:36,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:17:36,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:36,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:17:36,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:36,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:17:36,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 13:17:36,809 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 13:17:36,810 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 13:17:36,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 13:17:36,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 13:17:36,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 13:17:36,811 INFO L87 Difference]: Start difference. First operand 3383 states and 5097 transitions. Second operand 3 states. [2018-10-24 13:17:38,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:17:38,447 INFO L93 Difference]: Finished difference Result 8205 states and 12323 transitions. [2018-10-24 13:17:38,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 13:17:38,448 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 159 [2018-10-24 13:17:38,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:17:38,467 INFO L225 Difference]: With dead ends: 8205 [2018-10-24 13:17:38,468 INFO L226 Difference]: Without dead ends: 4824 [2018-10-24 13:17:38,474 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 13:17:38,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4824 states. [2018-10-24 13:17:38,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4824 to 4823. [2018-10-24 13:17:38,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4823 states. [2018-10-24 13:17:38,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4823 states to 4823 states and 7118 transitions. [2018-10-24 13:17:38,565 INFO L78 Accepts]: Start accepts. Automaton has 4823 states and 7118 transitions. Word has length 159 [2018-10-24 13:17:38,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:17:38,565 INFO L481 AbstractCegarLoop]: Abstraction has 4823 states and 7118 transitions. [2018-10-24 13:17:38,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 13:17:38,566 INFO L276 IsEmpty]: Start isEmpty. Operand 4823 states and 7118 transitions. [2018-10-24 13:17:38,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-10-24 13:17:38,574 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:17:38,574 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 13:17:38,574 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:17:38,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:17:38,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1893439127, now seen corresponding path program 1 times [2018-10-24 13:17:38,576 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:17:38,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:17:38,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:38,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:17:38,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:38,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:17:38,853 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-24 13:17:38,854 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 13:17:38,854 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 13:17:38,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 13:17:38,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 13:17:38,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 13:17:38,855 INFO L87 Difference]: Start difference. First operand 4823 states and 7118 transitions. Second operand 3 states. [2018-10-24 13:17:40,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:17:40,436 INFO L93 Difference]: Finished difference Result 9646 states and 14238 transitions. [2018-10-24 13:17:40,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 13:17:40,439 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 165 [2018-10-24 13:17:40,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:17:40,460 INFO L225 Difference]: With dead ends: 9646 [2018-10-24 13:17:40,460 INFO L226 Difference]: Without dead ends: 4825 [2018-10-24 13:17:40,467 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 13:17:40,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4825 states. [2018-10-24 13:17:40,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4825 to 4823. [2018-10-24 13:17:40,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4823 states. [2018-10-24 13:17:40,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4823 states to 4823 states and 6572 transitions. [2018-10-24 13:17:40,551 INFO L78 Accepts]: Start accepts. Automaton has 4823 states and 6572 transitions. Word has length 165 [2018-10-24 13:17:40,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:17:40,552 INFO L481 AbstractCegarLoop]: Abstraction has 4823 states and 6572 transitions. [2018-10-24 13:17:40,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 13:17:40,552 INFO L276 IsEmpty]: Start isEmpty. Operand 4823 states and 6572 transitions. [2018-10-24 13:17:40,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-24 13:17:40,560 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:17:40,560 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 13:17:40,560 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:17:40,561 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:17:40,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1455980942, now seen corresponding path program 1 times [2018-10-24 13:17:40,561 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:17:40,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:17:40,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:40,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:17:40,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:17:41,010 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 13:17:41,011 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 13:17:41,011 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 13:17:41,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:17:41,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:17:41,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 13:17:41,245 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-24 13:17:41,279 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 13:17:41,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2018-10-24 13:17:41,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 13:17:41,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 13:17:41,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-10-24 13:17:41,281 INFO L87 Difference]: Start difference. First operand 4823 states and 6572 transitions. Second operand 7 states. [2018-10-24 13:17:41,467 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-24 13:17:50,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:17:50,083 INFO L93 Difference]: Finished difference Result 29114 states and 38952 transitions. [2018-10-24 13:17:50,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 13:17:50,089 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 167 [2018-10-24 13:17:50,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:17:50,160 INFO L225 Difference]: With dead ends: 29114 [2018-10-24 13:17:50,160 INFO L226 Difference]: Without dead ends: 24293 [2018-10-24 13:17:50,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-10-24 13:17:50,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24293 states. [2018-10-24 13:17:50,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24293 to 23064. [2018-10-24 13:17:50,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23064 states. [2018-10-24 13:17:50,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23064 states to 23064 states and 27063 transitions. [2018-10-24 13:17:50,618 INFO L78 Accepts]: Start accepts. Automaton has 23064 states and 27063 transitions. Word has length 167 [2018-10-24 13:17:50,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:17:50,618 INFO L481 AbstractCegarLoop]: Abstraction has 23064 states and 27063 transitions. [2018-10-24 13:17:50,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 13:17:50,619 INFO L276 IsEmpty]: Start isEmpty. Operand 23064 states and 27063 transitions. [2018-10-24 13:17:50,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-10-24 13:17:50,646 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:17:50,646 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 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] [2018-10-24 13:17:50,647 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:17:50,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:17:50,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1645098079, now seen corresponding path program 1 times [2018-10-24 13:17:50,647 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:17:50,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:17:50,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:50,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:17:50,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:50,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:17:50,923 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 4 [2018-10-24 13:17:50,953 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 31 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-10-24 13:17:50,953 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 13:17:50,953 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-24 13:17:51,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 13:17:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:17:51,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 13:17:51,194 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-10-24 13:17:51,224 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 13:17:51,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 3 [2018-10-24 13:17:51,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 13:17:51,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 13:17:51,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 13:17:51,226 INFO L87 Difference]: Start difference. First operand 23064 states and 27063 transitions. Second operand 4 states. [2018-10-24 13:17:53,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:17:53,113 INFO L93 Difference]: Finished difference Result 89546 states and 105262 transitions. [2018-10-24 13:17:53,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 13:17:53,115 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 180 [2018-10-24 13:17:53,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:17:53,249 INFO L225 Difference]: With dead ends: 89546 [2018-10-24 13:17:53,250 INFO L226 Difference]: Without dead ends: 66484 [2018-10-24 13:17:53,292 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 13:17:53,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66484 states. [2018-10-24 13:17:54,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66484 to 45683. [2018-10-24 13:17:54,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45683 states. [2018-10-24 13:17:54,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45683 states to 45683 states and 53584 transitions. [2018-10-24 13:17:54,202 INFO L78 Accepts]: Start accepts. Automaton has 45683 states and 53584 transitions. Word has length 180 [2018-10-24 13:17:54,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:17:54,202 INFO L481 AbstractCegarLoop]: Abstraction has 45683 states and 53584 transitions. [2018-10-24 13:17:54,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 13:17:54,203 INFO L276 IsEmpty]: Start isEmpty. Operand 45683 states and 53584 transitions. [2018-10-24 13:17:54,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-10-24 13:17:54,245 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:17:54,245 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 3, 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] [2018-10-24 13:17:54,245 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:17:54,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:17:54,246 INFO L82 PathProgramCache]: Analyzing trace with hash -742748129, now seen corresponding path program 1 times [2018-10-24 13:17:54,246 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:17:54,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:17:54,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:54,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:17:54,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:54,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:17:54,388 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-10-24 13:17:54,388 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 13:17:54,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 13:17:54,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 13:17:54,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 13:17:54,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 13:17:54,390 INFO L87 Difference]: Start difference. First operand 45683 states and 53584 transitions. Second operand 3 states. [2018-10-24 13:17:56,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:17:56,621 INFO L93 Difference]: Finished difference Result 102992 states and 122311 transitions. [2018-10-24 13:17:56,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 13:17:56,621 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 201 [2018-10-24 13:17:56,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:17:56,750 INFO L225 Difference]: With dead ends: 102992 [2018-10-24 13:17:56,750 INFO L226 Difference]: Without dead ends: 57311 [2018-10-24 13:17:56,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 13:17:56,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57311 states. [2018-10-24 13:17:57,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57311 to 57305. [2018-10-24 13:17:57,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57305 states. [2018-10-24 13:17:57,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57305 states to 57305 states and 65491 transitions. [2018-10-24 13:17:57,970 INFO L78 Accepts]: Start accepts. Automaton has 57305 states and 65491 transitions. Word has length 201 [2018-10-24 13:17:57,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:17:57,970 INFO L481 AbstractCegarLoop]: Abstraction has 57305 states and 65491 transitions. [2018-10-24 13:17:57,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 13:17:57,973 INFO L276 IsEmpty]: Start isEmpty. Operand 57305 states and 65491 transitions. [2018-10-24 13:17:58,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-10-24 13:17:58,020 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:17:58,020 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 13:17:58,020 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:17:58,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:17:58,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1113812726, now seen corresponding path program 1 times [2018-10-24 13:17:58,021 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:17:58,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:17:58,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:58,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:17:58,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:17:58,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:17:58,219 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-10-24 13:17:58,220 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 13:17:58,220 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 13:17:58,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 13:17:58,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 13:17:58,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 13:17:58,222 INFO L87 Difference]: Start difference. First operand 57305 states and 65491 transitions. Second operand 3 states. [2018-10-24 13:17:59,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:17:59,387 INFO L93 Difference]: Finished difference Result 113318 states and 129513 transitions. [2018-10-24 13:17:59,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 13:17:59,388 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 209 [2018-10-24 13:17:59,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:17:59,471 INFO L225 Difference]: With dead ends: 113318 [2018-10-24 13:17:59,472 INFO L226 Difference]: Without dead ends: 56015 [2018-10-24 13:17:59,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 13:17:59,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56015 states. [2018-10-24 13:18:00,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56015 to 51925. [2018-10-24 13:18:00,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51925 states. [2018-10-24 13:18:00,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51925 states to 51925 states and 59090 transitions. [2018-10-24 13:18:00,183 INFO L78 Accepts]: Start accepts. Automaton has 51925 states and 59090 transitions. Word has length 209 [2018-10-24 13:18:00,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:18:00,183 INFO L481 AbstractCegarLoop]: Abstraction has 51925 states and 59090 transitions. [2018-10-24 13:18:00,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 13:18:00,184 INFO L276 IsEmpty]: Start isEmpty. Operand 51925 states and 59090 transitions. [2018-10-24 13:18:00,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2018-10-24 13:18:00,210 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:18:00,210 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 13:18:00,210 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:18:00,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:18:00,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1036642004, now seen corresponding path program 1 times [2018-10-24 13:18:00,211 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:18:00,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:18:00,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:18:00,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:18:00,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:18:00,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:18:01,131 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-24 13:18:01,132 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 13:18:01,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 13:18:01,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 13:18:01,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 13:18:01,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 13:18:01,133 INFO L87 Difference]: Start difference. First operand 51925 states and 59090 transitions. Second operand 4 states. [2018-10-24 13:18:03,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:18:03,537 INFO L93 Difference]: Finished difference Result 112416 states and 129178 transitions. [2018-10-24 13:18:03,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 13:18:03,538 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 280 [2018-10-24 13:18:03,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:18:03,615 INFO L225 Difference]: With dead ends: 112416 [2018-10-24 13:18:03,615 INFO L226 Difference]: Without dead ends: 60493 [2018-10-24 13:18:03,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 13:18:03,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60493 states. [2018-10-24 13:18:04,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60493 to 55387. [2018-10-24 13:18:04,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55387 states. [2018-10-24 13:18:04,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55387 states to 55387 states and 63179 transitions. [2018-10-24 13:18:04,368 INFO L78 Accepts]: Start accepts. Automaton has 55387 states and 63179 transitions. Word has length 280 [2018-10-24 13:18:04,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:18:04,368 INFO L481 AbstractCegarLoop]: Abstraction has 55387 states and 63179 transitions. [2018-10-24 13:18:04,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 13:18:04,369 INFO L276 IsEmpty]: Start isEmpty. Operand 55387 states and 63179 transitions. [2018-10-24 13:18:04,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-10-24 13:18:04,402 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:18:04,403 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 13:18:04,403 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:18:04,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:18:04,404 INFO L82 PathProgramCache]: Analyzing trace with hash -548332425, now seen corresponding path program 1 times [2018-10-24 13:18:04,404 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:18:04,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:18:04,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:18:04,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:18:04,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:18:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:18:04,721 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-10-24 13:18:04,722 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 13:18:04,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 13:18:04,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 13:18:04,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 13:18:04,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 13:18:04,723 INFO L87 Difference]: Start difference. First operand 55387 states and 63179 transitions. Second operand 3 states. [2018-10-24 13:18:05,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:18:05,922 INFO L93 Difference]: Finished difference Result 148720 states and 169032 transitions. [2018-10-24 13:18:05,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 13:18:05,923 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 302 [2018-10-24 13:18:05,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:18:06,046 INFO L225 Difference]: With dead ends: 148720 [2018-10-24 13:18:06,047 INFO L226 Difference]: Without dead ends: 93335 [2018-10-24 13:18:06,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 13:18:06,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93335 states. [2018-10-24 13:18:07,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93335 to 93332. [2018-10-24 13:18:07,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93332 states. [2018-10-24 13:18:07,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93332 states to 93332 states and 105815 transitions. [2018-10-24 13:18:07,800 INFO L78 Accepts]: Start accepts. Automaton has 93332 states and 105815 transitions. Word has length 302 [2018-10-24 13:18:07,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:18:07,800 INFO L481 AbstractCegarLoop]: Abstraction has 93332 states and 105815 transitions. [2018-10-24 13:18:07,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 13:18:07,801 INFO L276 IsEmpty]: Start isEmpty. Operand 93332 states and 105815 transitions. [2018-10-24 13:18:07,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2018-10-24 13:18:07,864 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:18:07,865 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 13:18:07,865 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:18:07,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:18:07,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1060290557, now seen corresponding path program 1 times [2018-10-24 13:18:07,865 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:18:07,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:18:07,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:18:07,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:18:07,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:18:07,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:18:08,519 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 305 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2018-10-24 13:18:08,520 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 13:18:08,520 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 13:18:08,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 13:18:08,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 13:18:08,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 13:18:08,522 INFO L87 Difference]: Start difference. First operand 93332 states and 105815 transitions. Second operand 4 states. [2018-10-24 13:18:11,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:18:11,498 INFO L93 Difference]: Finished difference Result 186668 states and 211638 transitions. [2018-10-24 13:18:11,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 13:18:11,498 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 389 [2018-10-24 13:18:11,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:18:11,612 INFO L225 Difference]: With dead ends: 186668 [2018-10-24 13:18:11,613 INFO L226 Difference]: Without dead ends: 93338 [2018-10-24 13:18:11,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 13:18:11,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93338 states. [2018-10-24 13:18:13,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93338 to 93332. [2018-10-24 13:18:13,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93332 states. [2018-10-24 13:18:13,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93332 states to 93332 states and 102844 transitions. [2018-10-24 13:18:13,797 INFO L78 Accepts]: Start accepts. Automaton has 93332 states and 102844 transitions. Word has length 389 [2018-10-24 13:18:13,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:18:13,798 INFO L481 AbstractCegarLoop]: Abstraction has 93332 states and 102844 transitions. [2018-10-24 13:18:13,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 13:18:13,798 INFO L276 IsEmpty]: Start isEmpty. Operand 93332 states and 102844 transitions. [2018-10-24 13:18:13,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2018-10-24 13:18:13,862 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:18:13,862 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 13:18:13,863 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:18:13,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:18:13,863 INFO L82 PathProgramCache]: Analyzing trace with hash 140313734, now seen corresponding path program 1 times [2018-10-24 13:18:13,863 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:18:13,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:18:13,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:18:13,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:18:13,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:18:13,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:18:14,388 WARN L179 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-10-24 13:18:14,533 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 223 proven. 0 refuted. 0 times theorem prover too weak. 479 trivial. 0 not checked. [2018-10-24 13:18:14,534 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 13:18:14,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 13:18:14,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 13:18:14,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 13:18:14,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 13:18:14,535 INFO L87 Difference]: Start difference. First operand 93332 states and 102844 transitions. Second operand 5 states. [2018-10-24 13:18:18,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:18:18,083 INFO L93 Difference]: Finished difference Result 257683 states and 284346 transitions. [2018-10-24 13:18:18,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 13:18:18,083 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 406 [2018-10-24 13:18:18,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:18:18,262 INFO L225 Difference]: With dead ends: 257683 [2018-10-24 13:18:18,262 INFO L226 Difference]: Without dead ends: 164353 [2018-10-24 13:18:18,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 13:18:18,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164353 states. [2018-10-24 13:18:21,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164353 to 156504. [2018-10-24 13:18:21,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156504 states. [2018-10-24 13:18:21,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156504 states to 156504 states and 171756 transitions. [2018-10-24 13:18:21,424 INFO L78 Accepts]: Start accepts. Automaton has 156504 states and 171756 transitions. Word has length 406 [2018-10-24 13:18:21,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:18:21,424 INFO L481 AbstractCegarLoop]: Abstraction has 156504 states and 171756 transitions. [2018-10-24 13:18:21,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 13:18:21,424 INFO L276 IsEmpty]: Start isEmpty. Operand 156504 states and 171756 transitions. [2018-10-24 13:18:21,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-10-24 13:18:21,485 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:18:21,485 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 13:18:21,486 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:18:21,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:18:21,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1264213576, now seen corresponding path program 1 times [2018-10-24 13:18:21,486 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:18:21,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:18:21,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:18:21,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:18:21,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:18:21,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:18:21,903 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 390 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-10-24 13:18:21,903 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 13:18:21,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 13:18:21,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 13:18:21,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 13:18:21,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 13:18:21,905 INFO L87 Difference]: Start difference. First operand 156504 states and 171756 transitions. Second operand 3 states. [2018-10-24 13:18:25,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:18:25,235 INFO L93 Difference]: Finished difference Result 301719 states and 331127 transitions. [2018-10-24 13:18:25,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 13:18:25,236 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 411 [2018-10-24 13:18:25,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:18:25,489 INFO L225 Difference]: With dead ends: 301719 [2018-10-24 13:18:25,489 INFO L226 Difference]: Without dead ends: 145217 [2018-10-24 13:18:25,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 13:18:25,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145217 states. [2018-10-24 13:18:29,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145217 to 145213. [2018-10-24 13:18:29,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145213 states. [2018-10-24 13:18:29,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145213 states to 145213 states and 156235 transitions. [2018-10-24 13:18:29,633 INFO L78 Accepts]: Start accepts. Automaton has 145213 states and 156235 transitions. Word has length 411 [2018-10-24 13:18:29,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:18:29,634 INFO L481 AbstractCegarLoop]: Abstraction has 145213 states and 156235 transitions. [2018-10-24 13:18:29,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 13:18:29,634 INFO L276 IsEmpty]: Start isEmpty. Operand 145213 states and 156235 transitions. [2018-10-24 13:18:29,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2018-10-24 13:18:29,695 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:18:29,696 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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, 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] [2018-10-24 13:18:29,696 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:18:29,696 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:18:29,697 INFO L82 PathProgramCache]: Analyzing trace with hash -777549419, now seen corresponding path program 1 times [2018-10-24 13:18:29,697 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:18:29,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:18:29,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:18:29,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:18:29,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:18:29,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:18:30,461 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-10-24 13:18:35,467 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 417 proven. 173 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-10-24 13:18:35,467 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 13:18:35,468 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 13:18:35,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:18:35,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:18:35,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 13:18:36,131 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-24 13:18:36,940 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 561 proven. 29 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-10-24 13:18:36,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 13:18:36,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 13 [2018-10-24 13:18:36,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-24 13:18:36,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-24 13:18:36,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2018-10-24 13:18:36,964 INFO L87 Difference]: Start difference. First operand 145213 states and 156235 transitions. Second operand 14 states. [2018-10-24 13:18:37,136 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2018-10-24 13:18:38,005 WARN L179 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2018-10-24 13:18:39,616 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2018-10-24 13:18:42,007 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-10-24 13:18:53,668 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2018-10-24 13:18:57,285 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2018-10-24 13:18:59,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:18:59,239 INFO L93 Difference]: Finished difference Result 859342 states and 922608 transitions. [2018-10-24 13:18:59,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-24 13:18:59,241 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 474 [2018-10-24 13:18:59,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:19:00,310 INFO L225 Difference]: With dead ends: 859342 [2018-10-24 13:19:00,311 INFO L226 Difference]: Without dead ends: 714131 [2018-10-24 13:19:01,394 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 470 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=595, Invalid=1661, Unknown=0, NotChecked=0, Total=2256 [2018-10-24 13:19:01,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714131 states. [2018-10-24 13:19:10,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714131 to 678837. [2018-10-24 13:19:10,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 678837 states. [2018-10-24 13:19:11,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678837 states to 678837 states and 728507 transitions. [2018-10-24 13:19:11,797 INFO L78 Accepts]: Start accepts. Automaton has 678837 states and 728507 transitions. Word has length 474 [2018-10-24 13:19:11,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:19:11,798 INFO L481 AbstractCegarLoop]: Abstraction has 678837 states and 728507 transitions. [2018-10-24 13:19:11,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-24 13:19:11,798 INFO L276 IsEmpty]: Start isEmpty. Operand 678837 states and 728507 transitions. [2018-10-24 13:19:11,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2018-10-24 13:19:11,949 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:19:11,949 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 13:19:11,950 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:19:11,950 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:19:11,950 INFO L82 PathProgramCache]: Analyzing trace with hash -999745126, now seen corresponding path program 1 times [2018-10-24 13:19:11,951 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:19:11,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:19:11,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:19:11,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:19:11,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:19:12,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:19:12,437 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-24 13:19:14,477 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 385 proven. 63 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2018-10-24 13:19:14,478 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 13:19:14,478 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 13:19:14,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:19:14,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:19:14,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 13:19:15,235 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 448 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2018-10-24 13:19:15,274 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 13:19:15,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2018-10-24 13:19:15,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 13:19:15,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 13:19:15,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-10-24 13:19:15,276 INFO L87 Difference]: Start difference. First operand 678837 states and 728507 transitions. Second operand 9 states. [2018-10-24 13:19:15,558 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-24 13:19:36,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:19:36,414 INFO L93 Difference]: Finished difference Result 1711031 states and 1839132 transitions. [2018-10-24 13:19:36,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-24 13:19:36,415 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 475 [2018-10-24 13:19:36,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:19:38,101 INFO L225 Difference]: With dead ends: 1711031 [2018-10-24 13:19:38,102 INFO L226 Difference]: Without dead ends: 1032196 [2018-10-24 13:19:38,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2018-10-24 13:19:39,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032196 states. [2018-10-24 13:19:54,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032196 to 918908. [2018-10-24 13:19:54,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 918908 states. [2018-10-24 13:19:55,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918908 states to 918908 states and 977035 transitions. [2018-10-24 13:19:55,844 INFO L78 Accepts]: Start accepts. Automaton has 918908 states and 977035 transitions. Word has length 475 [2018-10-24 13:19:55,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 13:19:55,845 INFO L481 AbstractCegarLoop]: Abstraction has 918908 states and 977035 transitions. [2018-10-24 13:19:55,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 13:19:55,845 INFO L276 IsEmpty]: Start isEmpty. Operand 918908 states and 977035 transitions. [2018-10-24 13:19:56,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2018-10-24 13:19:56,066 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 13:19:56,066 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 13:19:56,066 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 13:19:56,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 13:19:56,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1544941289, now seen corresponding path program 1 times [2018-10-24 13:19:56,067 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 13:19:56,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 13:19:56,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:19:56,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 13:19:56,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 13:19:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 13:20:05,530 INFO L134 CoverageAnalysis]: Checked inductivity of 779 backedges. 574 proven. 0 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2018-10-24 13:20:05,531 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 13:20:05,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 13:20:05,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 13:20:05,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 13:20:05,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 13:20:05,532 INFO L87 Difference]: Start difference. First operand 918908 states and 977035 transitions. Second operand 4 states. [2018-10-24 13:20:19,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 13:20:19,068 INFO L93 Difference]: Finished difference Result 2325709 states and 2469648 transitions. [2018-10-24 13:20:19,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 13:20:19,069 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 485 [2018-10-24 13:20:19,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 13:20:21,074 INFO L225 Difference]: With dead ends: 2325709 [2018-10-24 13:20:21,074 INFO L226 Difference]: Without dead ends: 1397783 [2018-10-24 13:20:21,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 13:20:23,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397783 states. Received shutdown request...