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_label14_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 20:51:42,097 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 20:51:42,102 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 20:51:42,116 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 20:51:42,117 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 20:51:42,118 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 20:51:42,119 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 20:51:42,121 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 20:51:42,123 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 20:51:42,124 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 20:51:42,125 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 20:51:42,125 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 20:51:42,126 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 20:51:42,127 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 20:51:42,129 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 20:51:42,129 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 20:51:42,130 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 20:51:42,132 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 20:51:42,134 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 20:51:42,136 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 20:51:42,137 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 20:51:42,139 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 20:51:42,142 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-23 20:51:42,149 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-23 20:51:42,149 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-23 20:51:42,150 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-23 20:51:42,152 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-23 20:51:42,152 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 20:51:42,174 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 20:51:42,174 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 20:51:42,176 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 20:51:42,176 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 20:51:42,177 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 20:51:42,177 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 20:51:42,177 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 20:51:42,177 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 20:51:42,178 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 20:51:42,178 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 20:51:42,178 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 20:51:42,178 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 20:51:42,178 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 20:51:42,179 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 20:51:42,179 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 20:51:42,179 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 20:51:42,179 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 20:51:42,179 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 20:51:42,180 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 20:51:42,181 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 20:51:42,181 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 20:51:42,181 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 20:51:42,182 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 20:51:42,182 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 20:51:42,182 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 20:51:42,182 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 20:51:42,182 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 20:51:42,182 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 20:51:42,236 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 20:51:42,250 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 20:51:42,254 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 20:51:42,256 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 20:51:42,257 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 20:51:42,257 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label14_true-unreach-call.c [2018-10-23 20:51:42,318 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/2a541638e/63b3db4bcc2c4decb00f3d0efd13dc4e/FLAG3e45b197c [2018-10-23 20:51:43,115 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 20:51:43,116 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label14_true-unreach-call.c [2018-10-23 20:51:43,146 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/2a541638e/63b3db4bcc2c4decb00f3d0efd13dc4e/FLAG3e45b197c [2018-10-23 20:51:43,167 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/2a541638e/63b3db4bcc2c4decb00f3d0efd13dc4e [2018-10-23 20:51:43,181 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 20:51:43,183 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 20:51:43,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 20:51:43,185 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 20:51:43,191 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 20:51:43,192 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:51:43" (1/1) ... [2018-10-23 20:51:43,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e66237e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:51:43, skipping insertion in model container [2018-10-23 20:51:43,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:51:43" (1/1) ... [2018-10-23 20:51:43,208 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 20:51:43,364 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 20:51:44,487 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 20:51:44,492 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 20:51:44,904 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 20:51:44,933 INFO L193 MainTranslator]: Completed translation [2018-10-23 20:51:44,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:51:44 WrapperNode [2018-10-23 20:51:44,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 20:51:44,935 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 20:51:44,935 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 20:51:44,935 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 20:51:44,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:51:44" (1/1) ... [2018-10-23 20:51:45,003 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:51:44" (1/1) ... [2018-10-23 20:51:45,429 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 20:51:45,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 20:51:45,430 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 20:51:45,430 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 20:51:45,441 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:51:44" (1/1) ... [2018-10-23 20:51:45,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:51:44" (1/1) ... [2018-10-23 20:51:45,469 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:51:44" (1/1) ... [2018-10-23 20:51:45,470 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:51:44" (1/1) ... [2018-10-23 20:51:45,549 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:51:44" (1/1) ... [2018-10-23 20:51:45,581 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:51:44" (1/1) ... [2018-10-23 20:51:45,610 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:51:44" (1/1) ... [2018-10-23 20:51:45,636 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 20:51:45,637 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 20:51:45,637 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 20:51:45,637 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 20:51:45,638 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:51:44" (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 20:51:45,711 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-23 20:51:45,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 20:51:45,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 20:51:54,759 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 20:51:54,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:51:54 BoogieIcfgContainer [2018-10-23 20:51:54,761 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 20:51:54,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 20:51:54,762 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 20:51:54,765 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 20:51:54,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:51:43" (1/3) ... [2018-10-23 20:51:54,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46ce596 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:51:54, skipping insertion in model container [2018-10-23 20:51:54,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:51:44" (2/3) ... [2018-10-23 20:51:54,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46ce596 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:51:54, skipping insertion in model container [2018-10-23 20:51:54,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:51:54" (3/3) ... [2018-10-23 20:51:54,770 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label14_true-unreach-call.c [2018-10-23 20:51:54,780 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 20:51:54,790 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 20:51:54,808 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 20:51:54,853 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 20:51:54,853 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 20:51:54,854 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 20:51:54,854 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 20:51:54,854 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 20:51:54,854 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 20:51:54,854 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 20:51:54,854 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 20:51:54,855 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 20:51:54,890 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states. [2018-10-23 20:51:54,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-23 20:51:54,907 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:51:54,908 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:51:54,911 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:51:54,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:51:54,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1316472986, now seen corresponding path program 1 times [2018-10-23 20:51:54,918 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:51:54,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:51:54,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:51:54,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:51:54,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:51:55,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:51:55,508 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 10 [2018-10-23 20:51:55,671 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 20:51:55,674 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:51:55,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 20:51:55,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 20:51:55,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 20:51:55,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-23 20:51:55,701 INFO L87 Difference]: Start difference. First operand 758 states. Second operand 6 states. [2018-10-23 20:51:55,886 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-23 20:52:13,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:52:13,988 INFO L93 Difference]: Finished difference Result 4292 states and 8414 transitions. [2018-10-23 20:52:13,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 20:52:13,991 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2018-10-23 20:52:13,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:52:14,041 INFO L225 Difference]: With dead ends: 4292 [2018-10-23 20:52:14,042 INFO L226 Difference]: Without dead ends: 3521 [2018-10-23 20:52:14,054 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 20:52:14,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3521 states. [2018-10-23 20:52:14,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3521 to 2828. [2018-10-23 20:52:14,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2828 states. [2018-10-23 20:52:14,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 4092 transitions. [2018-10-23 20:52:14,254 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 4092 transitions. Word has length 51 [2018-10-23 20:52:14,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:52:14,255 INFO L481 AbstractCegarLoop]: Abstraction has 2828 states and 4092 transitions. [2018-10-23 20:52:14,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 20:52:14,255 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 4092 transitions. [2018-10-23 20:52:14,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-10-23 20:52:14,268 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:52:14,269 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:52:14,269 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:52:14,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:52:14,270 INFO L82 PathProgramCache]: Analyzing trace with hash 191853071, now seen corresponding path program 1 times [2018-10-23 20:52:14,270 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:52:14,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:52:14,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:52:14,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:52:14,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:52:14,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:52:14,822 WARN L179 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2018-10-23 20:52:15,073 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:52:15,074 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:52:15,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:52:15,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:52:15,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:52:15,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:52:15,076 INFO L87 Difference]: Start difference. First operand 2828 states and 4092 transitions. Second operand 5 states. [2018-10-23 20:52:28,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:52:28,380 INFO L93 Difference]: Finished difference Result 8418 states and 12613 transitions. [2018-10-23 20:52:28,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 20:52:28,381 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 145 [2018-10-23 20:52:28,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:52:28,407 INFO L225 Difference]: With dead ends: 8418 [2018-10-23 20:52:28,407 INFO L226 Difference]: Without dead ends: 5592 [2018-10-23 20:52:28,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-23 20:52:28,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5592 states. [2018-10-23 20:52:28,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5592 to 5592. [2018-10-23 20:52:28,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5592 states. [2018-10-23 20:52:28,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5592 states to 5592 states and 7127 transitions. [2018-10-23 20:52:28,514 INFO L78 Accepts]: Start accepts. Automaton has 5592 states and 7127 transitions. Word has length 145 [2018-10-23 20:52:28,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:52:28,515 INFO L481 AbstractCegarLoop]: Abstraction has 5592 states and 7127 transitions. [2018-10-23 20:52:28,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:52:28,515 INFO L276 IsEmpty]: Start isEmpty. Operand 5592 states and 7127 transitions. [2018-10-23 20:52:28,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-10-23 20:52:28,520 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:52:28,520 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:52:28,520 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:52:28,521 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:52:28,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1030898957, now seen corresponding path program 1 times [2018-10-23 20:52:28,521 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:52:28,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:52:28,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:52:28,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:52:28,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:52:28,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:52:28,965 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2018-10-23 20:52:28,966 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:52:28,966 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 20:52:28,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:52:29,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:52:29,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:52:29,231 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:52:29,262 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:52:29,262 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2018-10-23 20:52:29,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:52:29,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:52:29,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:52:29,267 INFO L87 Difference]: Start difference. First operand 5592 states and 7127 transitions. Second operand 5 states. [2018-10-23 20:52:40,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:52:40,142 INFO L93 Difference]: Finished difference Result 18108 states and 25288 transitions. [2018-10-23 20:52:40,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 20:52:40,143 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 234 [2018-10-23 20:52:40,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:52:40,199 INFO L225 Difference]: With dead ends: 18108 [2018-10-23 20:52:40,199 INFO L226 Difference]: Without dead ends: 13209 [2018-10-23 20:52:40,208 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:52:40,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13209 states. [2018-10-23 20:52:40,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13209 to 9047. [2018-10-23 20:52:40,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9047 states. [2018-10-23 20:52:40,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9047 states to 9047 states and 11958 transitions. [2018-10-23 20:52:40,400 INFO L78 Accepts]: Start accepts. Automaton has 9047 states and 11958 transitions. Word has length 234 [2018-10-23 20:52:40,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:52:40,401 INFO L481 AbstractCegarLoop]: Abstraction has 9047 states and 11958 transitions. [2018-10-23 20:52:40,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:52:40,401 INFO L276 IsEmpty]: Start isEmpty. Operand 9047 states and 11958 transitions. [2018-10-23 20:52:40,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-10-23 20:52:40,407 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:52:40,407 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:52:40,407 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:52:40,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:52:40,408 INFO L82 PathProgramCache]: Analyzing trace with hash 607450177, now seen corresponding path program 1 times [2018-10-23 20:52:40,408 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:52:40,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:52:40,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:52:40,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:52:40,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:52:40,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:52:40,935 WARN L179 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-10-23 20:52:41,126 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 196 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:52:41,127 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:52:41,127 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 20:52:41,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:52:41,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:52:41,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:52:41,340 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2018-10-23 20:52:41,363 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:52:41,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2018-10-23 20:52:41,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 20:52:41,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 20:52:41,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-23 20:52:41,365 INFO L87 Difference]: Start difference. First operand 9047 states and 11958 transitions. Second operand 6 states. [2018-10-23 20:52:51,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:52:51,896 INFO L93 Difference]: Finished difference Result 29855 states and 39678 transitions. [2018-10-23 20:52:51,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 20:52:51,897 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 338 [2018-10-23 20:52:51,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:52:51,957 INFO L225 Difference]: With dead ends: 29855 [2018-10-23 20:52:51,958 INFO L226 Difference]: Without dead ends: 20117 [2018-10-23 20:52:51,976 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 337 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-10-23 20:52:51,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20117 states. [2018-10-23 20:52:52,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20117 to 14574. [2018-10-23 20:52:52,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14574 states. [2018-10-23 20:52:52,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14574 states to 14574 states and 16600 transitions. [2018-10-23 20:52:52,481 INFO L78 Accepts]: Start accepts. Automaton has 14574 states and 16600 transitions. Word has length 338 [2018-10-23 20:52:52,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:52:52,482 INFO L481 AbstractCegarLoop]: Abstraction has 14574 states and 16600 transitions. [2018-10-23 20:52:52,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 20:52:52,482 INFO L276 IsEmpty]: Start isEmpty. Operand 14574 states and 16600 transitions. [2018-10-23 20:52:52,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1035 [2018-10-23 20:52:52,518 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:52:52,519 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 20:52:52,520 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:52:52,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:52:52,521 INFO L82 PathProgramCache]: Analyzing trace with hash 841803403, now seen corresponding path program 1 times [2018-10-23 20:52:52,521 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:52:52,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:52:52,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:52:52,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:52:52,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:52:52,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:52:53,628 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 552 proven. 0 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2018-10-23 20:52:53,629 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:52:53,629 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:52:53,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:52:53,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:52:53,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:52:53,630 INFO L87 Difference]: Start difference. First operand 14574 states and 16600 transitions. Second operand 4 states. [2018-10-23 20:52:59,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:52:59,230 INFO L93 Difference]: Finished difference Result 49185 states and 57175 transitions. [2018-10-23 20:52:59,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:52:59,237 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1034 [2018-10-23 20:52:59,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:52:59,300 INFO L225 Difference]: With dead ends: 49185 [2018-10-23 20:52:59,300 INFO L226 Difference]: Without dead ends: 35304 [2018-10-23 20:52:59,321 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 20:52:59,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35304 states. [2018-10-23 20:52:59,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35304 to 34613. [2018-10-23 20:52:59,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34613 states. [2018-10-23 20:52:59,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34613 states to 34613 states and 38816 transitions. [2018-10-23 20:52:59,760 INFO L78 Accepts]: Start accepts. Automaton has 34613 states and 38816 transitions. Word has length 1034 [2018-10-23 20:52:59,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:52:59,762 INFO L481 AbstractCegarLoop]: Abstraction has 34613 states and 38816 transitions. [2018-10-23 20:52:59,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:52:59,762 INFO L276 IsEmpty]: Start isEmpty. Operand 34613 states and 38816 transitions. [2018-10-23 20:52:59,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1077 [2018-10-23 20:52:59,782 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:52:59,783 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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 20:52:59,783 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:52:59,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:52:59,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1215301676, now seen corresponding path program 1 times [2018-10-23 20:52:59,784 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:52:59,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:52:59,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:52:59,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:52:59,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:52:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:53:01,489 INFO L134 CoverageAnalysis]: Checked inductivity of 997 backedges. 525 proven. 0 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2018-10-23 20:53:01,490 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:53:01,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:53:01,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:53:01,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:53:01,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:53:01,491 INFO L87 Difference]: Start difference. First operand 34613 states and 38816 transitions. Second operand 4 states. [2018-10-23 20:53:06,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:53:06,870 INFO L93 Difference]: Finished difference Result 85808 states and 97408 transitions. [2018-10-23 20:53:06,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:53:06,870 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1076 [2018-10-23 20:53:06,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:53:06,970 INFO L225 Difference]: With dead ends: 85808 [2018-10-23 20:53:06,970 INFO L226 Difference]: Without dead ends: 51888 [2018-10-23 20:53:07,000 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 20:53:07,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51888 states. [2018-10-23 20:53:07,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51888 to 51197. [2018-10-23 20:53:07,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51197 states. [2018-10-23 20:53:07,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51197 states to 51197 states and 57235 transitions. [2018-10-23 20:53:07,591 INFO L78 Accepts]: Start accepts. Automaton has 51197 states and 57235 transitions. Word has length 1076 [2018-10-23 20:53:07,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:53:07,593 INFO L481 AbstractCegarLoop]: Abstraction has 51197 states and 57235 transitions. [2018-10-23 20:53:07,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:53:07,593 INFO L276 IsEmpty]: Start isEmpty. Operand 51197 states and 57235 transitions. [2018-10-23 20:53:07,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1077 [2018-10-23 20:53:07,618 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:53:07,620 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:53:07,620 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:53:07,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:53:07,621 INFO L82 PathProgramCache]: Analyzing trace with hash -159393085, now seen corresponding path program 1 times [2018-10-23 20:53:07,621 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:53:07,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:53:07,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:53:07,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:53:07,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:53:07,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:53:08,705 WARN L179 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2018-10-23 20:53:09,172 INFO L134 CoverageAnalysis]: Checked inductivity of 997 backedges. 643 proven. 0 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2018-10-23 20:53:09,172 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:53:09,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:53:09,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:53:09,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:53:09,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:53:09,174 INFO L87 Difference]: Start difference. First operand 51197 states and 57235 transitions. Second operand 4 states. [2018-10-23 20:53:14,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:53:14,387 INFO L93 Difference]: Finished difference Result 101701 states and 113776 transitions. [2018-10-23 20:53:14,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:53:14,388 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1076 [2018-10-23 20:53:14,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:53:14,488 INFO L225 Difference]: With dead ends: 101701 [2018-10-23 20:53:14,488 INFO L226 Difference]: Without dead ends: 51197 [2018-10-23 20:53:14,527 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:53:14,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51197 states. [2018-10-23 20:53:15,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51197 to 51197. [2018-10-23 20:53:15,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51197 states. [2018-10-23 20:53:15,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51197 states to 51197 states and 56658 transitions. [2018-10-23 20:53:15,103 INFO L78 Accepts]: Start accepts. Automaton has 51197 states and 56658 transitions. Word has length 1076 [2018-10-23 20:53:15,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:53:15,104 INFO L481 AbstractCegarLoop]: Abstraction has 51197 states and 56658 transitions. [2018-10-23 20:53:15,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:53:15,105 INFO L276 IsEmpty]: Start isEmpty. Operand 51197 states and 56658 transitions. [2018-10-23 20:53:15,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1127 [2018-10-23 20:53:15,127 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:53:15,128 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:53:15,129 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:53:15,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:53:15,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1601181541, now seen corresponding path program 1 times [2018-10-23 20:53:15,130 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:53:15,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:53:15,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:53:15,131 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:53:15,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:53:15,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:53:16,188 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-23 20:53:16,480 WARN L179 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 10 [2018-10-23 20:53:16,847 WARN L179 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2018-10-23 20:53:19,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 461 proven. 752 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-10-23 20:53:19,223 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:53:19,223 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 20:53:19,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:53:19,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:53:19,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:53:20,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 606 proven. 0 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2018-10-23 20:53:20,430 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:53:20,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2018-10-23 20:53:20,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-23 20:53:20,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-23 20:53:20,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-10-23 20:53:20,433 INFO L87 Difference]: Start difference. First operand 51197 states and 56658 transitions. Second operand 12 states. [2018-10-23 20:53:40,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:53:40,420 INFO L93 Difference]: Finished difference Result 149837 states and 169075 transitions. [2018-10-23 20:53:40,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-23 20:53:40,421 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 1126 [2018-10-23 20:53:40,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:53:40,563 INFO L225 Difference]: With dead ends: 149837 [2018-10-23 20:53:40,563 INFO L226 Difference]: Without dead ends: 99333 [2018-10-23 20:53:40,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1169 GetRequests, 1139 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=241, Invalid=629, Unknown=0, NotChecked=0, Total=870 [2018-10-23 20:53:40,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99333 states. [2018-10-23 20:53:41,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99333 to 69854. [2018-10-23 20:53:41,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69854 states. [2018-10-23 20:53:41,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69854 states to 69854 states and 76930 transitions. [2018-10-23 20:53:41,559 INFO L78 Accepts]: Start accepts. Automaton has 69854 states and 76930 transitions. Word has length 1126 [2018-10-23 20:53:41,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:53:41,561 INFO L481 AbstractCegarLoop]: Abstraction has 69854 states and 76930 transitions. [2018-10-23 20:53:41,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-23 20:53:41,561 INFO L276 IsEmpty]: Start isEmpty. Operand 69854 states and 76930 transitions. [2018-10-23 20:53:41,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1127 [2018-10-23 20:53:41,582 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:53:41,583 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:53:41,583 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:53:41,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:53:41,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1423836986, now seen corresponding path program 1 times [2018-10-23 20:53:41,584 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:53:41,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:53:41,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:53:41,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:53:41,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:53:41,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:53:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 770 proven. 0 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2018-10-23 20:53:42,997 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:53:42,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:53:42,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:53:42,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:53:42,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:53:42,999 INFO L87 Difference]: Start difference. First operand 69854 states and 76930 transitions. Second operand 4 states. [2018-10-23 20:53:48,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:53:48,367 INFO L93 Difference]: Finished difference Result 159745 states and 175987 transitions. [2018-10-23 20:53:48,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:53:48,368 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1126 [2018-10-23 20:53:48,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:53:48,465 INFO L225 Difference]: With dead ends: 159745 [2018-10-23 20:53:48,466 INFO L226 Difference]: Without dead ends: 90584 [2018-10-23 20:53:48,503 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 20:53:48,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90584 states. [2018-10-23 20:53:49,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90584 to 90584. [2018-10-23 20:53:49,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90584 states. [2018-10-23 20:53:49,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90584 states to 90584 states and 97916 transitions. [2018-10-23 20:53:49,381 INFO L78 Accepts]: Start accepts. Automaton has 90584 states and 97916 transitions. Word has length 1126 [2018-10-23 20:53:49,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:53:49,383 INFO L481 AbstractCegarLoop]: Abstraction has 90584 states and 97916 transitions. [2018-10-23 20:53:49,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:53:49,383 INFO L276 IsEmpty]: Start isEmpty. Operand 90584 states and 97916 transitions. [2018-10-23 20:53:49,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1180 [2018-10-23 20:53:49,410 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:53:49,411 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:53:49,412 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:53:49,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:53:49,412 INFO L82 PathProgramCache]: Analyzing trace with hash -128694643, now seen corresponding path program 1 times [2018-10-23 20:53:49,412 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:53:49,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:53:49,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:53:49,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:53:49,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:53:49,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:53:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 665 proven. 499 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2018-10-23 20:53:53,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:53:53,818 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 20:53:53,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:53:54,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:53:54,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:53:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 1165 trivial. 0 not checked. [2018-10-23 20:53:55,681 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:53:55,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [11] total 12 [2018-10-23 20:53:55,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-23 20:53:55,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-23 20:53:55,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2018-10-23 20:53:55,684 INFO L87 Difference]: Start difference. First operand 90584 states and 97916 transitions. Second operand 13 states. [2018-10-23 20:54:11,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:54:11,968 INFO L93 Difference]: Finished difference Result 186140 states and 200886 transitions. [2018-10-23 20:54:11,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-23 20:54:11,969 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 1179 [2018-10-23 20:54:11,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:54:12,072 INFO L225 Difference]: With dead ends: 186140 [2018-10-23 20:54:12,072 INFO L226 Difference]: Without dead ends: 85165 [2018-10-23 20:54:12,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1203 GetRequests, 1179 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=198, Invalid=452, Unknown=0, NotChecked=0, Total=650 [2018-10-23 20:54:12,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85165 states. [2018-10-23 20:54:12,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85165 to 80196. [2018-10-23 20:54:12,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80196 states. [2018-10-23 20:54:12,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80196 states to 80196 states and 85379 transitions. [2018-10-23 20:54:12,817 INFO L78 Accepts]: Start accepts. Automaton has 80196 states and 85379 transitions. Word has length 1179 [2018-10-23 20:54:12,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:54:12,818 INFO L481 AbstractCegarLoop]: Abstraction has 80196 states and 85379 transitions. [2018-10-23 20:54:12,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-23 20:54:12,818 INFO L276 IsEmpty]: Start isEmpty. Operand 80196 states and 85379 transitions. [2018-10-23 20:54:12,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1196 [2018-10-23 20:54:12,836 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:54:12,837 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:54:12,837 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:54:12,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:54:12,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1937957301, now seen corresponding path program 1 times [2018-10-23 20:54:12,838 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:54:12,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:54:12,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:54:12,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:54:12,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:54:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:54:13,596 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-10-23 20:54:14,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 830 proven. 0 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2018-10-23 20:54:14,249 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:54:14,249 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:54:14,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:54:14,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:54:14,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:54:14,250 INFO L87 Difference]: Start difference. First operand 80196 states and 85379 transitions. Second operand 4 states. [2018-10-23 20:54:20,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:54:20,294 INFO L93 Difference]: Finished difference Result 208772 states and 222240 transitions. [2018-10-23 20:54:20,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:54:20,294 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1195 [2018-10-23 20:54:20,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:54:20,435 INFO L225 Difference]: With dead ends: 208772 [2018-10-23 20:54:20,435 INFO L226 Difference]: Without dead ends: 129269 [2018-10-23 20:54:20,499 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 20:54:20,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129269 states. [2018-10-23 20:54:21,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129269 to 110600. [2018-10-23 20:54:21,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110600 states. [2018-10-23 20:54:21,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110600 states to 110600 states and 116259 transitions. [2018-10-23 20:54:21,972 INFO L78 Accepts]: Start accepts. Automaton has 110600 states and 116259 transitions. Word has length 1195 [2018-10-23 20:54:21,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:54:21,973 INFO L481 AbstractCegarLoop]: Abstraction has 110600 states and 116259 transitions. [2018-10-23 20:54:21,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:54:21,973 INFO L276 IsEmpty]: Start isEmpty. Operand 110600 states and 116259 transitions. [2018-10-23 20:54:21,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1210 [2018-10-23 20:54:21,989 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:54:21,990 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:54:21,991 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:54:21,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:54:21,991 INFO L82 PathProgramCache]: Analyzing trace with hash -65336071, now seen corresponding path program 1 times [2018-10-23 20:54:21,991 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:54:21,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:54:21,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:54:21,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:54:21,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:54:22,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:54:23,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 619 proven. 0 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2018-10-23 20:54:23,235 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:54:23,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:54:23,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:54:23,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:54:23,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:54:23,236 INFO L87 Difference]: Start difference. First operand 110600 states and 116259 transitions. Second operand 4 states. [2018-10-23 20:54:28,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:54:28,406 INFO L93 Difference]: Finished difference Result 221889 states and 233211 transitions. [2018-10-23 20:54:28,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:54:28,407 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1209 [2018-10-23 20:54:28,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:54:28,512 INFO L225 Difference]: With dead ends: 221889 [2018-10-23 20:54:28,512 INFO L226 Difference]: Without dead ends: 107827 [2018-10-23 20:54:28,564 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 20:54:28,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107827 states. [2018-10-23 20:54:29,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107827 to 105063. [2018-10-23 20:54:29,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105063 states. [2018-10-23 20:54:29,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105063 states to 105063 states and 109674 transitions. [2018-10-23 20:54:29,379 INFO L78 Accepts]: Start accepts. Automaton has 105063 states and 109674 transitions. Word has length 1209 [2018-10-23 20:54:29,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:54:29,380 INFO L481 AbstractCegarLoop]: Abstraction has 105063 states and 109674 transitions. [2018-10-23 20:54:29,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:54:29,380 INFO L276 IsEmpty]: Start isEmpty. Operand 105063 states and 109674 transitions. [2018-10-23 20:54:29,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1246 [2018-10-23 20:54:29,394 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:54:29,395 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, 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, 6, 6, 5, 5, 5, 5, 5, 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, 1] [2018-10-23 20:54:29,395 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:54:29,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:54:29,396 INFO L82 PathProgramCache]: Analyzing trace with hash 485557004, now seen corresponding path program 1 times [2018-10-23 20:54:29,396 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:54:29,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:54:29,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:54:29,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:54:29,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:54:29,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:54:30,601 WARN L179 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 10 [2018-10-23 20:54:30,926 WARN L179 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 13 [2018-10-23 20:54:33,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2102 backedges. 833 proven. 1055 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2018-10-23 20:54:33,938 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:54:33,938 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 20:54:33,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:54:34,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:54:34,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:54:34,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2102 backedges. 1075 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2018-10-23 20:54:34,943 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:54:34,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2018-10-23 20:54:34,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-23 20:54:34,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-23 20:54:34,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-10-23 20:54:34,946 INFO L87 Difference]: Start difference. First operand 105063 states and 109674 transitions. Second operand 12 states. [2018-10-23 20:54:51,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:54:51,641 INFO L93 Difference]: Finished difference Result 247398 states and 258356 transitions. [2018-10-23 20:54:51,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-23 20:54:51,641 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 1245 [2018-10-23 20:54:51,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:54:51,801 INFO L225 Difference]: With dead ends: 247398 [2018-10-23 20:54:51,801 INFO L226 Difference]: Without dead ends: 143028 [2018-10-23 20:54:51,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1283 GetRequests, 1256 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2018-10-23 20:54:51,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143028 states. [2018-10-23 20:54:52,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143028 to 104371. [2018-10-23 20:54:52,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104371 states. [2018-10-23 20:54:52,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104371 states to 104371 states and 107471 transitions. [2018-10-23 20:54:52,957 INFO L78 Accepts]: Start accepts. Automaton has 104371 states and 107471 transitions. Word has length 1245 [2018-10-23 20:54:52,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:54:52,958 INFO L481 AbstractCegarLoop]: Abstraction has 104371 states and 107471 transitions. [2018-10-23 20:54:52,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-23 20:54:52,958 INFO L276 IsEmpty]: Start isEmpty. Operand 104371 states and 107471 transitions. [2018-10-23 20:54:52,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1259 [2018-10-23 20:54:52,975 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:54:52,975 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, 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, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1] [2018-10-23 20:54:52,976 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:54:52,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:54:52,976 INFO L82 PathProgramCache]: Analyzing trace with hash 553529017, now seen corresponding path program 1 times [2018-10-23 20:54:52,976 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:54:52,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:54:52,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:54:52,977 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:54:52,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:54:53,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:54:54,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2143 backedges. 1113 proven. 0 refuted. 0 times theorem prover too weak. 1030 trivial. 0 not checked. [2018-10-23 20:54:54,809 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:54:54,810 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:54:54,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:54:54,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:54:54,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:54:54,811 INFO L87 Difference]: Start difference. First operand 104371 states and 107471 transitions. Second operand 4 states. [2018-10-23 20:55:00,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:55:00,665 INFO L93 Difference]: Finished difference Result 222554 states and 229196 transitions. [2018-10-23 20:55:00,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:55:00,665 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1258 [2018-10-23 20:55:00,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:55:00,775 INFO L225 Difference]: With dead ends: 222554 [2018-10-23 20:55:00,775 INFO L226 Difference]: Without dead ends: 112650 [2018-10-23 20:55:00,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 5 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 20:55:00,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112650 states. [2018-10-23 20:55:01,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112650 to 110577. [2018-10-23 20:55:01,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110577 states. [2018-10-23 20:55:01,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110577 states to 110577 states and 112771 transitions. [2018-10-23 20:55:01,772 INFO L78 Accepts]: Start accepts. Automaton has 110577 states and 112771 transitions. Word has length 1258 [2018-10-23 20:55:01,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:55:01,773 INFO L481 AbstractCegarLoop]: Abstraction has 110577 states and 112771 transitions. [2018-10-23 20:55:01,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:55:01,773 INFO L276 IsEmpty]: Start isEmpty. Operand 110577 states and 112771 transitions. [2018-10-23 20:55:01,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1268 [2018-10-23 20:55:01,791 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:55:01,792 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:55:01,792 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:55:01,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:55:01,793 INFO L82 PathProgramCache]: Analyzing trace with hash 2033787139, now seen corresponding path program 1 times [2018-10-23 20:55:01,793 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:55:01,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:55:01,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:55:01,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:55:01,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:55:01,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:55:02,578 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-10-23 20:55:03,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 1098 proven. 0 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2018-10-23 20:55:03,412 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:55:03,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:55:03,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:55:03,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:55:03,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:55:03,413 INFO L87 Difference]: Start difference. First operand 110577 states and 112771 transitions. Second operand 4 states. [2018-10-23 20:55:07,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:55:07,579 INFO L93 Difference]: Finished difference Result 225298 states and 229769 transitions. [2018-10-23 20:55:07,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:55:07,579 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1267 [2018-10-23 20:55:07,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:55:07,692 INFO L225 Difference]: With dead ends: 225298 [2018-10-23 20:55:07,692 INFO L226 Difference]: Without dead ends: 115414 [2018-10-23 20:55:07,760 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 20:55:07,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115414 states. [2018-10-23 20:55:09,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115414 to 111268. [2018-10-23 20:55:09,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111268 states. [2018-10-23 20:55:09,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111268 states to 111268 states and 113353 transitions. [2018-10-23 20:55:09,137 INFO L78 Accepts]: Start accepts. Automaton has 111268 states and 113353 transitions. Word has length 1267 [2018-10-23 20:55:09,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:55:09,138 INFO L481 AbstractCegarLoop]: Abstraction has 111268 states and 113353 transitions. [2018-10-23 20:55:09,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:55:09,138 INFO L276 IsEmpty]: Start isEmpty. Operand 111268 states and 113353 transitions. [2018-10-23 20:55:09,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1304 [2018-10-23 20:55:09,151 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:55:09,152 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:55:09,152 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:55:09,152 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:55:09,153 INFO L82 PathProgramCache]: Analyzing trace with hash -874116444, now seen corresponding path program 1 times [2018-10-23 20:55:09,153 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:55:09,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:55:09,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:55:09,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:55:09,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:55:09,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:55:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1768 backedges. 1033 proven. 157 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2018-10-23 20:55:11,172 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:55:11,172 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 20:55:11,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:55:11,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:55:11,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:55:12,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1768 backedges. 1033 proven. 157 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2018-10-23 20:55:12,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 20:55:12,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2018-10-23 20:55:12,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 20:55:12,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 20:55:12,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-10-23 20:55:12,709 INFO L87 Difference]: Start difference. First operand 111268 states and 113353 transitions. Second operand 7 states. Received shutdown request... [2018-10-23 20:55:27,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-23 20:55:27,504 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 20:55:27,510 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 20:55:27,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:55:27 BoogieIcfgContainer [2018-10-23 20:55:27,511 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 20:55:27,511 INFO L168 Benchmark]: Toolchain (without parser) took 224329.33 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.4 GB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -372.7 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. [2018-10-23 20:55:27,513 INFO L168 Benchmark]: CDTParser took 0.93 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 20:55:27,513 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1749.75 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 20:55:27,514 INFO L168 Benchmark]: Boogie Procedure Inliner took 494.87 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 774.4 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -936.6 MB). Peak memory consumption was 45.0 MB. Max. memory is 7.1 GB. [2018-10-23 20:55:27,516 INFO L168 Benchmark]: Boogie Preprocessor took 206.63 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: 28.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. [2018-10-23 20:55:27,516 INFO L168 Benchmark]: RCFGBuilder took 9123.83 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.6 GB in the end (delta: 527.0 MB). Peak memory consumption was 527.0 MB. Max. memory is 7.1 GB. [2018-10-23 20:55:27,517 INFO L168 Benchmark]: TraceAbstraction took 212748.85 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.7 GB). Free memory was 1.6 GB in the beginning and 1.8 GB in the end (delta: -139.5 MB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. [2018-10-23 20:55:27,523 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.93 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 1749.75 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 494.87 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 774.4 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -936.6 MB). Peak memory consumption was 45.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 206.63 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: 28.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 9123.83 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.6 GB in the end (delta: 527.0 MB). Peak memory consumption was 527.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 212748.85 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.7 GB). Free memory was 1.6 GB in the beginning and 1.8 GB in the end (delta: -139.5 MB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 159]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 159). Cancelled while BasicCegarLoop was constructing difference of abstraction (111268states) and FLOYD_HOARE automaton (currently 9 states, 7 states before enhancement),while ReachableStatesComputation was computing reachable states (240312 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 758 locations, 1 error locations. TIMEOUT Result, 212.6s OverallTime, 16 OverallIterations, 8 TraceHistogramMax, 165.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 8022 SDtfs, 66274 SDslu, 2495 SDs, 0 SdLazy, 113112 SolverSat, 16475 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 128.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5604 GetRequests, 5469 SyntacticMatches, 16 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 7.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=111268occurred 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: 10.8s AutomataMinimizationTime, 15 MinimizatonAttempts, 112537 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.8s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 17.7s InterpolantComputationTime, 20287 NumberOfCodeBlocks, 20287 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 20265 ConstructedInterpolants, 0 QuantifiedInterpolants, 65140774 SizeOfPredicates, 4 NumberOfNonLiveVariables, 6323 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 22 InterpolantComputations, 15 PerfectInterpolantSequences, 21958/24587 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown