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/Problem18_label15_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 20:52:22,763 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 20:52:22,766 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 20:52:22,778 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 20:52:22,779 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 20:52:22,780 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 20:52:22,781 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 20:52:22,783 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 20:52:22,785 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 20:52:22,785 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 20:52:22,786 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 20:52:22,787 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 20:52:22,787 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 20:52:22,788 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 20:52:22,790 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 20:52:22,790 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 20:52:22,791 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 20:52:22,793 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 20:52:22,795 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 20:52:22,797 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 20:52:22,798 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 20:52:22,799 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 20:52:22,801 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-23 20:52:22,814 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-23 20:52:22,815 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-23 20:52:22,816 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-23 20:52:22,816 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-23 20:52:22,817 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-23 20:52:22,843 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 20:52:22,843 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 20:52:22,845 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 20:52:22,845 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 20:52:22,846 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 20:52:22,846 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 20:52:22,846 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 20:52:22,846 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 20:52:22,846 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 20:52:22,847 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 20:52:22,848 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 20:52:22,848 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 20:52:22,848 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 20:52:22,848 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 20:52:22,848 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 20:52:22,849 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 20:52:22,849 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 20:52:22,849 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 20:52:22,849 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 20:52:22,849 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 20:52:22,851 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 20:52:22,851 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 20:52:22,851 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 20:52:22,851 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 20:52:22,852 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 20:52:22,852 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 20:52:22,852 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 20:52:22,852 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 20:52:22,900 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 20:52:22,917 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 20:52:22,921 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 20:52:22,923 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 20:52:22,924 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 20:52:22,924 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label15_true-unreach-call.c [2018-10-23 20:52:22,988 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/585cc4cac/6e60edae1af84279ac5228a6702b0d22/FLAG239aa2785 [2018-10-23 20:52:23,743 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 20:52:23,744 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label15_true-unreach-call.c [2018-10-23 20:52:23,772 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/585cc4cac/6e60edae1af84279ac5228a6702b0d22/FLAG239aa2785 [2018-10-23 20:52:23,789 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/585cc4cac/6e60edae1af84279ac5228a6702b0d22 [2018-10-23 20:52:23,801 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 20:52:23,803 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 20:52:23,804 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 20:52:23,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 20:52:23,808 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 20:52:23,810 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:52:23" (1/1) ... [2018-10-23 20:52:23,813 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e1a2d94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:52:23, skipping insertion in model container [2018-10-23 20:52:23,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:52:23" (1/1) ... [2018-10-23 20:52:23,824 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 20:52:23,970 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 20:52:24,955 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 20:52:24,959 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 20:52:25,462 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 20:52:25,491 INFO L193 MainTranslator]: Completed translation [2018-10-23 20:52:25,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:52:25 WrapperNode [2018-10-23 20:52:25,492 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 20:52:25,493 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 20:52:25,493 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 20:52:25,494 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 20:52:25,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:52:25" (1/1) ... [2018-10-23 20:52:25,556 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:52:25" (1/1) ... [2018-10-23 20:52:25,978 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 20:52:25,979 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 20:52:25,979 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 20:52:25,979 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 20:52:25,990 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:52:25" (1/1) ... [2018-10-23 20:52:25,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:52:25" (1/1) ... [2018-10-23 20:52:26,028 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:52:25" (1/1) ... [2018-10-23 20:52:26,029 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:52:25" (1/1) ... [2018-10-23 20:52:26,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:52:25" (1/1) ... [2018-10-23 20:52:26,200 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:52:25" (1/1) ... [2018-10-23 20:52:26,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:52:25" (1/1) ... [2018-10-23 20:52:26,310 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 20:52:26,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 20:52:26,311 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 20:52:26,311 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 20:52:26,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:52:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 20:52:26,381 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-23 20:52:26,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 20:52:26,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 20:52:34,898 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 20:52:34,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:52:34 BoogieIcfgContainer [2018-10-23 20:52:34,900 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 20:52:34,901 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 20:52:34,901 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 20:52:34,904 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 20:52:34,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:52:23" (1/3) ... [2018-10-23 20:52:34,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f6c8766 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:52:34, skipping insertion in model container [2018-10-23 20:52:34,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:52:25" (2/3) ... [2018-10-23 20:52:34,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f6c8766 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:52:34, skipping insertion in model container [2018-10-23 20:52:34,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:52:34" (3/3) ... [2018-10-23 20:52:34,909 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label15_true-unreach-call.c [2018-10-23 20:52:34,919 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 20:52:34,930 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 20:52:34,948 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 20:52:34,990 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 20:52:34,990 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 20:52:34,991 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 20:52:34,991 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 20:52:34,991 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 20:52:34,991 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 20:52:34,991 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 20:52:34,992 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 20:52:34,992 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 20:52:35,032 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states. [2018-10-23 20:52:35,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-23 20:52:35,042 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:52:35,043 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] [2018-10-23 20:52:35,046 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:52:35,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:52:35,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1502078046, now seen corresponding path program 1 times [2018-10-23 20:52:35,055 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:52:35,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:52:35,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:52:35,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:52:35,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:52:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:52:35,499 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-23 20:52:35,678 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 10 [2018-10-23 20:52:35,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:52:35,783 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:52:35,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 20:52:35,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 20:52:35,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 20:52:35,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-23 20:52:35,808 INFO L87 Difference]: Start difference. First operand 758 states. Second operand 6 states. [2018-10-23 20:52:53,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:52:53,270 INFO L93 Difference]: Finished difference Result 4292 states and 8414 transitions. [2018-10-23 20:52:53,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 20:52:53,356 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2018-10-23 20:52:53,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:52:53,408 INFO L225 Difference]: With dead ends: 4292 [2018-10-23 20:52:53,409 INFO L226 Difference]: Without dead ends: 3521 [2018-10-23 20:52:53,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-23 20:52:53,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3521 states. [2018-10-23 20:52:53,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3521 to 2828. [2018-10-23 20:52:53,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2828 states. [2018-10-23 20:52:53,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 4092 transitions. [2018-10-23 20:52:53,580 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 4092 transitions. Word has length 36 [2018-10-23 20:52:53,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:52:53,581 INFO L481 AbstractCegarLoop]: Abstraction has 2828 states and 4092 transitions. [2018-10-23 20:52:53,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 20:52:53,581 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 4092 transitions. [2018-10-23 20:52:53,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-23 20:52:53,587 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:52:53,587 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:52:53,588 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:52:53,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:52:53,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1557995980, now seen corresponding path program 1 times [2018-10-23 20:52:53,588 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:52:53,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:52:53,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:52:53,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:52:53,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:52:53,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:52:54,084 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:52:54,084 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:52:54,085 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:52:54,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:52:54,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:52:54,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:52:54,087 INFO L87 Difference]: Start difference. First operand 2828 states and 4092 transitions. Second operand 5 states. [2018-10-23 20:53:07,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:53:07,855 INFO L93 Difference]: Finished difference Result 8418 states and 12613 transitions. [2018-10-23 20:53:07,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 20:53:07,862 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2018-10-23 20:53:07,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:53:07,888 INFO L225 Difference]: With dead ends: 8418 [2018-10-23 20:53:07,889 INFO L226 Difference]: Without dead ends: 5592 [2018-10-23 20:53:07,894 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-23 20:53:07,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5592 states. [2018-10-23 20:53:07,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5592 to 5592. [2018-10-23 20:53:07,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5592 states. [2018-10-23 20:53:07,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5592 states to 5592 states and 7127 transitions. [2018-10-23 20:53:08,000 INFO L78 Accepts]: Start accepts. Automaton has 5592 states and 7127 transitions. Word has length 130 [2018-10-23 20:53:08,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:53:08,000 INFO L481 AbstractCegarLoop]: Abstraction has 5592 states and 7127 transitions. [2018-10-23 20:53:08,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:53:08,001 INFO L276 IsEmpty]: Start isEmpty. Operand 5592 states and 7127 transitions. [2018-10-23 20:53:08,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-10-23 20:53:08,006 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:53:08,006 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:53:08,006 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:53:08,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:53:08,007 INFO L82 PathProgramCache]: Analyzing trace with hash 708353098, now seen corresponding path program 1 times [2018-10-23 20:53:08,007 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:53:08,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:53:08,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:53:08,008 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:53:08,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:53:08,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:53:08,451 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-10-23 20:53:08,451 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:53:08,452 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:53:08,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:53:08,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:53:08,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:53:08,669 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:53:08,698 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:53:08,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2018-10-23 20:53:08,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:53:08,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:53:08,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:53:08,702 INFO L87 Difference]: Start difference. First operand 5592 states and 7127 transitions. Second operand 5 states. [2018-10-23 20:53:21,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:53:21,017 INFO L93 Difference]: Finished difference Result 21563 states and 31341 transitions. [2018-10-23 20:53:21,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 20:53:21,017 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 219 [2018-10-23 20:53:21,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:53:21,095 INFO L225 Difference]: With dead ends: 21563 [2018-10-23 20:53:21,095 INFO L226 Difference]: Without dead ends: 16664 [2018-10-23 20:53:21,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-23 20:53:21,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16664 states. [2018-10-23 20:53:21,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16664 to 16664. [2018-10-23 20:53:21,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16664 states. [2018-10-23 20:53:21,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16664 states to 16664 states and 20659 transitions. [2018-10-23 20:53:21,437 INFO L78 Accepts]: Start accepts. Automaton has 16664 states and 20659 transitions. Word has length 219 [2018-10-23 20:53:21,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:53:21,438 INFO L481 AbstractCegarLoop]: Abstraction has 16664 states and 20659 transitions. [2018-10-23 20:53:21,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:53:21,438 INFO L276 IsEmpty]: Start isEmpty. Operand 16664 states and 20659 transitions. [2018-10-23 20:53:21,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2018-10-23 20:53:21,458 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:53:21,459 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:53:21,459 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:53:21,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:53:21,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1075072866, now seen corresponding path program 1 times [2018-10-23 20:53:21,460 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:53:21,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:53:21,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:53:21,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:53:21,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:53:21,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:53:22,274 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 254 proven. 65 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-10-23 20:53:22,274 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:53:22,274 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:53:22,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:53:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:53:22,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:53:22,584 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 288 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2018-10-23 20:53:22,605 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:53:22,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2018-10-23 20:53:22,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:53:22,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:53:22,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:53:22,607 INFO L87 Difference]: Start difference. First operand 16664 states and 20659 transitions. Second operand 5 states. [2018-10-23 20:53:33,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:53:33,616 INFO L93 Difference]: Finished difference Result 58202 states and 76736 transitions. [2018-10-23 20:53:33,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 20:53:33,618 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 407 [2018-10-23 20:53:33,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:53:33,704 INFO L225 Difference]: With dead ends: 58202 [2018-10-23 20:53:33,705 INFO L226 Difference]: Without dead ends: 40848 [2018-10-23 20:53:33,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 408 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-23 20:53:33,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40848 states. [2018-10-23 20:53:34,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40848 to 39466. [2018-10-23 20:53:34,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39466 states. [2018-10-23 20:53:34,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39466 states to 39466 states and 46860 transitions. [2018-10-23 20:53:34,212 INFO L78 Accepts]: Start accepts. Automaton has 39466 states and 46860 transitions. Word has length 407 [2018-10-23 20:53:34,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:53:34,213 INFO L481 AbstractCegarLoop]: Abstraction has 39466 states and 46860 transitions. [2018-10-23 20:53:34,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:53:34,213 INFO L276 IsEmpty]: Start isEmpty. Operand 39466 states and 46860 transitions. [2018-10-23 20:53:34,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2018-10-23 20:53:34,227 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:53:34,228 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:53:34,228 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:53:34,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:53:34,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1780739334, now seen corresponding path program 1 times [2018-10-23 20:53:34,229 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:53:34,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:53:34,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:53:34,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:53:34,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:53:34,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:53:34,758 WARN L179 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-10-23 20:53:35,019 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 431 proven. 4 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2018-10-23 20:53:35,019 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:53:35,020 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:53:35,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:53:35,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:53:35,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:53:35,547 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 465 proven. 0 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2018-10-23 20:53:35,568 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:53:35,568 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2018-10-23 20:53:35,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 20:53:35,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 20:53:35,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-23 20:53:35,571 INFO L87 Difference]: Start difference. First operand 39466 states and 46860 transitions. Second operand 6 states. [2018-10-23 20:53:47,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:53:47,895 INFO L93 Difference]: Finished difference Result 92075 states and 107517 transitions. [2018-10-23 20:53:47,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-23 20:53:47,896 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 486 [2018-10-23 20:53:47,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:53:47,975 INFO L225 Difference]: With dead ends: 92075 [2018-10-23 20:53:47,975 INFO L226 Difference]: Without dead ends: 39454 [2018-10-23 20:53:48,006 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 488 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-10-23 20:53:48,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39454 states. [2018-10-23 20:53:48,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39454 to 32524. [2018-10-23 20:53:48,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32524 states. [2018-10-23 20:53:48,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32524 states to 32524 states and 34848 transitions. [2018-10-23 20:53:48,356 INFO L78 Accepts]: Start accepts. Automaton has 32524 states and 34848 transitions. Word has length 486 [2018-10-23 20:53:48,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:53:48,356 INFO L481 AbstractCegarLoop]: Abstraction has 32524 states and 34848 transitions. [2018-10-23 20:53:48,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 20:53:48,357 INFO L276 IsEmpty]: Start isEmpty. Operand 32524 states and 34848 transitions. [2018-10-23 20:53:48,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1062 [2018-10-23 20:53:48,397 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:53:48,398 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:53:48,399 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:53:48,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:53:48,399 INFO L82 PathProgramCache]: Analyzing trace with hash -15644022, now seen corresponding path program 1 times [2018-10-23 20:53:48,400 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:53:48,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:53:48,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:53:48,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:53:48,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:53:48,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:53:49,643 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 465 proven. 0 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2018-10-23 20:53:49,643 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:53:49,643 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:53:49,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:53:49,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:53:49,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:53:49,645 INFO L87 Difference]: Start difference. First operand 32524 states and 34848 transitions. Second operand 4 states. [2018-10-23 20:53:54,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:53:54,715 INFO L93 Difference]: Finished difference Result 78866 states and 84847 transitions. [2018-10-23 20:53:54,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:53:54,716 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1061 [2018-10-23 20:53:54,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:53:54,815 INFO L225 Difference]: With dead ends: 78866 [2018-10-23 20:53:54,815 INFO L226 Difference]: Without dead ends: 46343 [2018-10-23 20:53:54,844 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 [2018-10-23 20:53:54,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46343 states. [2018-10-23 20:53:55,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46343 to 46343. [2018-10-23 20:53:55,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46343 states. [2018-10-23 20:53:55,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46343 states to 46343 states and 49080 transitions. [2018-10-23 20:53:55,340 INFO L78 Accepts]: Start accepts. Automaton has 46343 states and 49080 transitions. Word has length 1061 [2018-10-23 20:53:55,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:53:55,341 INFO L481 AbstractCegarLoop]: Abstraction has 46343 states and 49080 transitions. [2018-10-23 20:53:55,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:53:55,342 INFO L276 IsEmpty]: Start isEmpty. Operand 46343 states and 49080 transitions. [2018-10-23 20:53:55,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1156 [2018-10-23 20:53:55,365 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:53:55,366 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:53:55,368 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:53:55,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:53:55,368 INFO L82 PathProgramCache]: Analyzing trace with hash 705655273, now seen corresponding path program 1 times [2018-10-23 20:53:55,368 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:53:55,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:53:55,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:53:55,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:53:55,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:53:55,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:53:56,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1526 backedges. 540 proven. 34 refuted. 0 times theorem prover too weak. 952 trivial. 0 not checked. [2018-10-23 20:53:56,757 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:53:56,757 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:53:56,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:53:56,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:53:57,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:53:57,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1526 backedges. 203 proven. 0 refuted. 0 times theorem prover too weak. 1323 trivial. 0 not checked. [2018-10-23 20:53:57,887 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:53:57,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-10-23 20:53:57,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:53:57,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:53:57,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:53:57,890 INFO L87 Difference]: Start difference. First operand 46343 states and 49080 transitions. Second operand 5 states. [2018-10-23 20:54:08,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:54:08,548 INFO L93 Difference]: Finished difference Result 103740 states and 110391 transitions. [2018-10-23 20:54:08,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 20:54:08,548 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1155 [2018-10-23 20:54:08,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:54:08,616 INFO L225 Difference]: With dead ends: 103740 [2018-10-23 20:54:08,616 INFO L226 Difference]: Without dead ends: 57397 [2018-10-23 20:54:08,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1162 GetRequests, 1157 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-23 20:54:08,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57397 states. [2018-10-23 20:54:09,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57397 to 55324. [2018-10-23 20:54:09,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55324 states. [2018-10-23 20:54:09,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55324 states to 55324 states and 57552 transitions. [2018-10-23 20:54:09,189 INFO L78 Accepts]: Start accepts. Automaton has 55324 states and 57552 transitions. Word has length 1155 [2018-10-23 20:54:09,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:54:09,191 INFO L481 AbstractCegarLoop]: Abstraction has 55324 states and 57552 transitions. [2018-10-23 20:54:09,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:54:09,191 INFO L276 IsEmpty]: Start isEmpty. Operand 55324 states and 57552 transitions. [2018-10-23 20:54:09,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1670 [2018-10-23 20:54:09,292 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:54:09,293 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:54:09,293 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:54:09,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:54:09,294 INFO L82 PathProgramCache]: Analyzing trace with hash -932309146, now seen corresponding path program 1 times [2018-10-23 20:54:09,294 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:54:09,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:54:09,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:54:09,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:54:09,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:54:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:54:13,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2353 backedges. 1528 proven. 567 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2018-10-23 20:54:13,851 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:54:13,851 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:54:13,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:54:14,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:54:14,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:54:15,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2353 backedges. 1644 proven. 0 refuted. 0 times theorem prover too weak. 709 trivial. 0 not checked. [2018-10-23 20:54:15,495 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:54:15,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2018-10-23 20:54:15,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-23 20:54:15,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-23 20:54:15,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-10-23 20:54:15,498 INFO L87 Difference]: Start difference. First operand 55324 states and 57552 transitions. Second operand 10 states. [2018-10-23 20:54:35,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:54:35,815 INFO L93 Difference]: Finished difference Result 249314 states and 260878 transitions. [2018-10-23 20:54:35,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-23 20:54:35,815 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1669 [2018-10-23 20:54:35,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:54:36,033 INFO L225 Difference]: With dead ends: 249314 [2018-10-23 20:54:36,033 INFO L226 Difference]: Without dead ends: 174738 [2018-10-23 20:54:36,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1703 GetRequests, 1681 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2018-10-23 20:54:36,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174738 states. [2018-10-23 20:54:37,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174738 to 70505. [2018-10-23 20:54:37,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70505 states. [2018-10-23 20:54:37,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70505 states to 70505 states and 72815 transitions. [2018-10-23 20:54:37,271 INFO L78 Accepts]: Start accepts. Automaton has 70505 states and 72815 transitions. Word has length 1669 [2018-10-23 20:54:37,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:54:37,272 INFO L481 AbstractCegarLoop]: Abstraction has 70505 states and 72815 transitions. [2018-10-23 20:54:37,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-23 20:54:37,272 INFO L276 IsEmpty]: Start isEmpty. Operand 70505 states and 72815 transitions. [2018-10-23 20:54:37,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1795 [2018-10-23 20:54:37,352 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:54:37,353 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:54:37,354 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:54:37,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:54:37,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1903596378, now seen corresponding path program 1 times [2018-10-23 20:54:37,354 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:54:37,355 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:54:37,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:54:37,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:54:37,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:54:37,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:54:38,713 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 4 [2018-10-23 20:54:40,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2784 backedges. 1982 proven. 0 refuted. 0 times theorem prover too weak. 802 trivial. 0 not checked. [2018-10-23 20:54:40,075 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:54:40,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:54:40,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:54:40,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:54:40,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:54:40,077 INFO L87 Difference]: Start difference. First operand 70505 states and 72815 transitions. Second operand 4 states. [2018-10-23 20:54:44,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:54:44,628 INFO L93 Difference]: Finished difference Result 157592 states and 162848 transitions. [2018-10-23 20:54:44,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:54:44,629 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1794 [2018-10-23 20:54:44,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:54:44,715 INFO L225 Difference]: With dead ends: 157592 [2018-10-23 20:54:44,715 INFO L226 Difference]: Without dead ends: 87780 [2018-10-23 20:54:44,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:54:44,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87780 states. [2018-10-23 20:54:45,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87780 to 81561. [2018-10-23 20:54:45,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81561 states. [2018-10-23 20:54:45,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81561 states to 81561 states and 83886 transitions. [2018-10-23 20:54:45,485 INFO L78 Accepts]: Start accepts. Automaton has 81561 states and 83886 transitions. Word has length 1794 [2018-10-23 20:54:45,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:54:45,487 INFO L481 AbstractCegarLoop]: Abstraction has 81561 states and 83886 transitions. [2018-10-23 20:54:45,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:54:45,487 INFO L276 IsEmpty]: Start isEmpty. Operand 81561 states and 83886 transitions. [2018-10-23 20:54:45,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1886 [2018-10-23 20:54:45,568 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:54:45,569 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:54:45,570 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:54:45,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:54:45,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1545586991, now seen corresponding path program 1 times [2018-10-23 20:54:45,571 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:54:45,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:54:45,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:54:45,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:54:45,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:54:45,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:54:46,585 WARN L179 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-10-23 20:54:47,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3312 backedges. 2292 proven. 0 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2018-10-23 20:54:47,975 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:54:47,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:54:47,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:54:47,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:54:47,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:54:47,979 INFO L87 Difference]: Start difference. First operand 81561 states and 83886 transitions. Second operand 4 states. [2018-10-23 20:54:53,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:54:53,611 INFO L93 Difference]: Finished difference Result 165185 states and 169882 transitions. [2018-10-23 20:54:53,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:54:53,612 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1885 [2018-10-23 20:54:53,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:54:53,865 INFO L225 Difference]: With dead ends: 165185 [2018-10-23 20:54:53,865 INFO L226 Difference]: Without dead ends: 84317 [2018-10-23 20:54:53,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:54:53,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84317 states. [2018-10-23 20:54:54,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84317 to 82244. [2018-10-23 20:54:54,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82244 states. [2018-10-23 20:54:54,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82244 states to 82244 states and 84229 transitions. [2018-10-23 20:54:54,536 INFO L78 Accepts]: Start accepts. Automaton has 82244 states and 84229 transitions. Word has length 1885 [2018-10-23 20:54:54,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:54:54,537 INFO L481 AbstractCegarLoop]: Abstraction has 82244 states and 84229 transitions. [2018-10-23 20:54:54,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:54:54,537 INFO L276 IsEmpty]: Start isEmpty. Operand 82244 states and 84229 transitions. [2018-10-23 20:54:54,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1917 [2018-10-23 20:54:54,599 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:54:54,602 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:54:54,602 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:54:54,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:54:54,603 INFO L82 PathProgramCache]: Analyzing trace with hash 403071248, now seen corresponding path program 1 times [2018-10-23 20:54:54,603 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:54:54,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:54:54,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:54:54,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:54:54,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:54:54,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:54:55,553 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-10-23 20:54:57,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3460 backedges. 2243 proven. 0 refuted. 0 times theorem prover too weak. 1217 trivial. 0 not checked. [2018-10-23 20:54:57,083 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:54:57,083 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:54:57,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:54:57,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:54:57,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:54:57,085 INFO L87 Difference]: Start difference. First operand 82244 states and 84229 transitions. Second operand 4 states. [2018-10-23 20:55:02,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:55:02,011 INFO L93 Difference]: Finished difference Result 165177 states and 169154 transitions. [2018-10-23 20:55:02,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:55:02,011 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1916 [2018-10-23 20:55:02,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:55:02,106 INFO L225 Difference]: With dead ends: 165177 [2018-10-23 20:55:02,106 INFO L226 Difference]: Without dead ends: 83626 [2018-10-23 20:55:02,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:55:02,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83626 states. [2018-10-23 20:55:02,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83626 to 81553. [2018-10-23 20:55:02,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81553 states. [2018-10-23 20:55:02,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81553 states to 81553 states and 83173 transitions. [2018-10-23 20:55:02,932 INFO L78 Accepts]: Start accepts. Automaton has 81553 states and 83173 transitions. Word has length 1916 [2018-10-23 20:55:02,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:55:02,932 INFO L481 AbstractCegarLoop]: Abstraction has 81553 states and 83173 transitions. [2018-10-23 20:55:02,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:55:02,932 INFO L276 IsEmpty]: Start isEmpty. Operand 81553 states and 83173 transitions. [2018-10-23 20:55:02,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1963 [2018-10-23 20:55:02,993 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:55:02,994 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:55:02,994 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:55:02,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:55:02,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1840010894, now seen corresponding path program 1 times [2018-10-23 20:55:02,995 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:55:02,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:55:02,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:55:02,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:55:02,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:55:03,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:55:06,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3215 backedges. 1585 proven. 0 refuted. 0 times theorem prover too weak. 1630 trivial. 0 not checked. [2018-10-23 20:55:06,301 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:55:06,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:55:06,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:55:06,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:55:06,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:55:06,304 INFO L87 Difference]: Start difference. First operand 81553 states and 83173 transitions. Second operand 4 states. [2018-10-23 20:55:11,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:55:11,060 INFO L93 Difference]: Finished difference Result 163104 states and 166355 transitions. [2018-10-23 20:55:11,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:55:11,061 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1962 [2018-10-23 20:55:11,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:55:11,136 INFO L225 Difference]: With dead ends: 163104 [2018-10-23 20:55:11,136 INFO L226 Difference]: Without dead ends: 76705 [2018-10-23 20:55:11,180 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:55:11,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76705 states. [2018-10-23 20:55:11,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76705 to 76705. [2018-10-23 20:55:11,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76705 states. [2018-10-23 20:55:11,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76705 states to 76705 states and 77811 transitions. [2018-10-23 20:55:11,861 INFO L78 Accepts]: Start accepts. Automaton has 76705 states and 77811 transitions. Word has length 1962 [2018-10-23 20:55:11,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:55:11,862 INFO L481 AbstractCegarLoop]: Abstraction has 76705 states and 77811 transitions. [2018-10-23 20:55:11,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:55:11,862 INFO L276 IsEmpty]: Start isEmpty. Operand 76705 states and 77811 transitions. [2018-10-23 20:55:11,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2347 [2018-10-23 20:55:11,940 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:55:11,941 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:55:11,942 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:55:11,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:55:11,943 INFO L82 PathProgramCache]: Analyzing trace with hash 168307962, now seen corresponding path program 1 times [2018-10-23 20:55:11,943 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:55:11,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:55:11,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:55:11,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:55:11,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:55:12,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:55:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4893 backedges. 3233 proven. 0 refuted. 0 times theorem prover too weak. 1660 trivial. 0 not checked. [2018-10-23 20:55:15,490 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:55:15,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:55:15,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 20:55:15,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 20:55:15,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:55:15,492 INFO L87 Difference]: Start difference. First operand 76705 states and 77811 transitions. Second operand 3 states. [2018-10-23 20:55:18,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:55:18,210 INFO L93 Difference]: Finished difference Result 152717 states and 154928 transitions. [2018-10-23 20:55:18,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 20:55:18,212 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2346 [2018-10-23 20:55:18,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:55:18,279 INFO L225 Difference]: With dead ends: 152717 [2018-10-23 20:55:18,280 INFO L226 Difference]: Without dead ends: 76705 [2018-10-23 20:55:18,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:55:18,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76705 states. [2018-10-23 20:55:19,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76705 to 75323. [2018-10-23 20:55:19,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75323 states. [2018-10-23 20:55:19,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75323 states to 75323 states and 76407 transitions. [2018-10-23 20:55:19,305 INFO L78 Accepts]: Start accepts. Automaton has 75323 states and 76407 transitions. Word has length 2346 [2018-10-23 20:55:19,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:55:19,306 INFO L481 AbstractCegarLoop]: Abstraction has 75323 states and 76407 transitions. [2018-10-23 20:55:19,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 20:55:19,306 INFO L276 IsEmpty]: Start isEmpty. Operand 75323 states and 76407 transitions. [2018-10-23 20:55:19,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2347 [2018-10-23 20:55:19,387 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:55:19,388 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:55:19,388 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:55:19,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:55:19,389 INFO L82 PathProgramCache]: Analyzing trace with hash -852572033, now seen corresponding path program 1 times [2018-10-23 20:55:19,389 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:55:19,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:55:19,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:55:19,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:55:19,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:55:19,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:55:23,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5040 backedges. 2623 proven. 1057 refuted. 0 times theorem prover too weak. 1360 trivial. 0 not checked. [2018-10-23 20:55:23,645 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:55:23,645 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:55:23,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:55:24,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:55:24,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:55:27,710 WARN L179 SmtUtils]: Spent 3.07 s on a formula simplification. DAG size of input: 469 DAG size of output: 21 [2018-10-23 20:55:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5040 backedges. 2004 proven. 0 refuted. 0 times theorem prover too weak. 3036 trivial. 0 not checked. [2018-10-23 20:55:36,033 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:55:36,034 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2018-10-23 20:55:36,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 20:55:36,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 20:55:36,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=38, Unknown=0, NotChecked=0, Total=72 [2018-10-23 20:55:36,037 INFO L87 Difference]: Start difference. First operand 75323 states and 76407 transitions. Second operand 9 states. [2018-10-23 20:55:52,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:55:52,573 INFO L93 Difference]: Finished difference Result 196270 states and 199158 transitions. [2018-10-23 20:55:52,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-23 20:55:52,573 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 2346 [2018-10-23 20:55:52,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:55:52,737 INFO L225 Difference]: With dead ends: 196270 [2018-10-23 20:55:52,737 INFO L226 Difference]: Without dead ends: 121620 [2018-10-23 20:55:52,806 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2356 GetRequests, 2346 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2018-10-23 20:55:52,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121620 states. [2018-10-23 20:55:53,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121620 to 93289. [2018-10-23 20:55:53,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93289 states. [2018-10-23 20:55:53,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93289 states to 93289 states and 94619 transitions. [2018-10-23 20:55:53,947 INFO L78 Accepts]: Start accepts. Automaton has 93289 states and 94619 transitions. Word has length 2346 [2018-10-23 20:55:53,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:55:53,948 INFO L481 AbstractCegarLoop]: Abstraction has 93289 states and 94619 transitions. [2018-10-23 20:55:53,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-23 20:55:53,949 INFO L276 IsEmpty]: Start isEmpty. Operand 93289 states and 94619 transitions. [2018-10-23 20:55:54,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3097 [2018-10-23 20:55:54,049 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:55:54,050 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:55:54,050 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:55:54,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:55:54,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1879404657, now seen corresponding path program 1 times [2018-10-23 20:55:54,051 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:55:54,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:55:54,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:55:54,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:55:54,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:55:54,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:55:59,226 INFO L134 CoverageAnalysis]: Checked inductivity of 10380 backedges. 6102 proven. 0 refuted. 0 times theorem prover too weak. 4278 trivial. 0 not checked. [2018-10-23 20:55:59,226 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:55:59,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:55:59,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:55:59,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:55:59,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:55:59,229 INFO L87 Difference]: Start difference. First operand 93289 states and 94619 transitions. Second operand 4 states. [2018-10-23 20:56:04,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:56:04,413 INFO L93 Difference]: Finished difference Result 189340 states and 192063 transitions. [2018-10-23 20:56:04,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:56:04,413 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3096 [2018-10-23 20:56:04,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:56:04,522 INFO L225 Difference]: With dead ends: 189340 [2018-10-23 20:56:04,522 INFO L226 Difference]: Without dead ends: 96744 [2018-10-23 20:56:04,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:56:04,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96744 states. [2018-10-23 20:56:05,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96744 to 96744. [2018-10-23 20:56:05,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96744 states. [2018-10-23 20:56:05,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96744 states to 96744 states and 98060 transitions. [2018-10-23 20:56:05,531 INFO L78 Accepts]: Start accepts. Automaton has 96744 states and 98060 transitions. Word has length 3096 [2018-10-23 20:56:05,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:56:05,533 INFO L481 AbstractCegarLoop]: Abstraction has 96744 states and 98060 transitions. [2018-10-23 20:56:05,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:56:05,533 INFO L276 IsEmpty]: Start isEmpty. Operand 96744 states and 98060 transitions. [2018-10-23 20:56:06,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3122 [2018-10-23 20:56:06,160 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:56:06,161 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:56:06,162 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:56:06,162 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:56:06,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1545133774, now seen corresponding path program 1 times [2018-10-23 20:56:06,163 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:56:06,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:56:06,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:56:06,164 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:56:06,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:56:06,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:56:11,641 INFO L134 CoverageAnalysis]: Checked inductivity of 10059 backedges. 6793 proven. 0 refuted. 0 times theorem prover too weak. 3266 trivial. 0 not checked. [2018-10-23 20:56:11,641 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:56:11,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:56:11,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:56:11,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:56:11,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:56:11,644 INFO L87 Difference]: Start difference. First operand 96744 states and 98060 transitions. Second operand 4 states. Received shutdown request... [2018-10-23 20:56:14,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:56:14,416 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 20:56:14,422 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 20:56:14,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:56:14 BoogieIcfgContainer [2018-10-23 20:56:14,423 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 20:56:14,424 INFO L168 Benchmark]: Toolchain (without parser) took 230621.78 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 336.1 MB). Peak memory consumption was 2.8 GB. Max. memory is 7.1 GB. [2018-10-23 20:56:14,425 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 20:56:14,425 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1688.62 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 148.0 MB). Peak memory consumption was 148.0 MB. Max. memory is 7.1 GB. [2018-10-23 20:56:14,426 INFO L168 Benchmark]: Boogie Procedure Inliner took 485.14 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 799.0 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -964.4 MB). Peak memory consumption was 45.0 MB. Max. memory is 7.1 GB. [2018-10-23 20:56:14,427 INFO L168 Benchmark]: Boogie Preprocessor took 331.96 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 27.2 MB). Peak memory consumption was 27.2 MB. Max. memory is 7.1 GB. [2018-10-23 20:56:14,428 INFO L168 Benchmark]: RCFGBuilder took 8589.04 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 531.3 MB). Peak memory consumption was 531.3 MB. Max. memory is 7.1 GB. [2018-10-23 20:56:14,429 INFO L168 Benchmark]: TraceAbstraction took 219521.96 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.7 GB). Free memory was 1.7 GB in the beginning and 1.1 GB in the end (delta: 594.1 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-10-23 20:56:14,436 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1688.62 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 148.0 MB). Peak memory consumption was 148.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 485.14 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 799.0 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -964.4 MB). Peak memory consumption was 45.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 331.96 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 27.2 MB). Peak memory consumption was 27.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8589.04 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 531.3 MB). Peak memory consumption was 531.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 219521.96 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.7 GB). Free memory was 1.7 GB in the beginning and 1.1 GB in the end (delta: 594.1 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 114]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 114). Cancelled while BasicCegarLoop was constructing difference of abstraction (96744states) and FLOYD_HOARE automaton (currently 4 states, 4 states before enhancement),while ReachableStatesComputation was computing reachable states (13594 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 758 locations, 1 error locations. TIMEOUT Result, 219.4s OverallTime, 16 OverallIterations, 13 TraceHistogramMax, 152.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 7574 SDtfs, 44243 SDslu, 1608 SDs, 0 SdLazy, 96252 SolverSat, 17799 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 118.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6414 GetRequests, 6321 SyntacticMatches, 17 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 7.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96744occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 9.5s AutomataMinimizationTime, 15 MinimizatonAttempts, 155389 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 2.4s SatisfiabilityAnalysisTime, 28.6s InterpolantComputationTime, 29911 NumberOfCodeBlocks, 29911 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 29889 ConstructedInterpolants, 564 QuantifiedInterpolants, 137853199 SizeOfPredicates, 6 NumberOfNonLiveVariables, 7274 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 22 InterpolantComputations, 16 PerfectInterpolantSequences, 57185/58917 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown