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_label04_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 20:50:11,763 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 20:50:11,765 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 20:50:11,780 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 20:50:11,780 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 20:50:11,781 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 20:50:11,782 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 20:50:11,784 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 20:50:11,786 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 20:50:11,787 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 20:50:11,788 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 20:50:11,788 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 20:50:11,789 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 20:50:11,790 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 20:50:11,792 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 20:50:11,793 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 20:50:11,794 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 20:50:11,797 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 20:50:11,802 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 20:50:11,808 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 20:50:11,809 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 20:50:11,813 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 20:50:11,817 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-23 20:50:11,818 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-23 20:50:11,818 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-23 20:50:11,819 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-23 20:50:11,821 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-23 20:50:11,822 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-23 20:50:11,823 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-23 20:50:11,826 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-23 20:50:11,826 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-23 20:50:11,827 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-23 20:50:11,827 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-23 20:50:11,827 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-23 20:50:11,829 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-23 20:50:11,830 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-23 20:50:11,830 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 20:50:11,860 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 20:50:11,860 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 20:50:11,862 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 20:50:11,862 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 20:50:11,862 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 20:50:11,863 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 20:50:11,863 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 20:50:11,863 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 20:50:11,863 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 20:50:11,863 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 20:50:11,865 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 20:50:11,865 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 20:50:11,865 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 20:50:11,865 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 20:50:11,865 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 20:50:11,866 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 20:50:11,866 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 20:50:11,866 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 20:50:11,866 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 20:50:11,866 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 20:50:11,868 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 20:50:11,868 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 20:50:11,868 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 20:50:11,869 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 20:50:11,869 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 20:50:11,869 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 20:50:11,869 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 20:50:11,869 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 20:50:11,914 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 20:50:11,932 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 20:50:11,937 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 20:50:11,938 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 20:50:11,939 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 20:50:11,939 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label04_true-unreach-call.c [2018-10-23 20:50:12,007 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a8baf0de3/9d5b169c6c0b48b092ed2edd506c793d/FLAG05bccc515 [2018-10-23 20:50:12,707 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 20:50:12,707 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label04_true-unreach-call.c [2018-10-23 20:50:12,732 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a8baf0de3/9d5b169c6c0b48b092ed2edd506c793d/FLAG05bccc515 [2018-10-23 20:50:12,747 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a8baf0de3/9d5b169c6c0b48b092ed2edd506c793d [2018-10-23 20:50:12,759 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 20:50:12,761 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 20:50:12,762 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 20:50:12,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 20:50:12,766 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 20:50:12,767 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:50:12" (1/1) ... [2018-10-23 20:50:12,770 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@255fd7b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:50:12, skipping insertion in model container [2018-10-23 20:50:12,771 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:50:12" (1/1) ... [2018-10-23 20:50:12,782 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 20:50:12,924 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 20:50:13,931 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 20:50:13,936 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 20:50:14,445 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 20:50:14,476 INFO L193 MainTranslator]: Completed translation [2018-10-23 20:50:14,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:50:14 WrapperNode [2018-10-23 20:50:14,477 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 20:50:14,477 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 20:50:14,478 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 20:50:14,478 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 20:50:14,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:50:14" (1/1) ... [2018-10-23 20:50:14,544 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:50:14" (1/1) ... [2018-10-23 20:50:14,931 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 20:50:14,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 20:50:14,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 20:50:14,931 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 20:50:14,945 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:50:14" (1/1) ... [2018-10-23 20:50:14,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:50:14" (1/1) ... [2018-10-23 20:50:14,977 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:50:14" (1/1) ... [2018-10-23 20:50:14,977 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:50:14" (1/1) ... [2018-10-23 20:50:15,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:50:14" (1/1) ... [2018-10-23 20:50:15,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:50:14" (1/1) ... [2018-10-23 20:50:15,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:50:14" (1/1) ... [2018-10-23 20:50:15,211 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 20:50:15,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 20:50:15,212 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 20:50:15,212 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 20:50:15,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:50:14" (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 20:50:15,283 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-23 20:50:15,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 20:50:15,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 20:50:23,072 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 20:50:23,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:50:23 BoogieIcfgContainer [2018-10-23 20:50:23,073 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 20:50:23,074 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 20:50:23,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 20:50:23,078 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 20:50:23,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:50:12" (1/3) ... [2018-10-23 20:50:23,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634f218e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:50:23, skipping insertion in model container [2018-10-23 20:50:23,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:50:14" (2/3) ... [2018-10-23 20:50:23,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634f218e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:50:23, skipping insertion in model container [2018-10-23 20:50:23,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:50:23" (3/3) ... [2018-10-23 20:50:23,082 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label04_true-unreach-call.c [2018-10-23 20:50:23,093 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 20:50:23,102 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 20:50:23,120 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 20:50:23,167 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 20:50:23,167 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 20:50:23,167 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 20:50:23,167 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 20:50:23,167 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 20:50:23,168 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 20:50:23,168 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 20:50:23,168 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 20:50:23,168 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 20:50:23,202 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states. [2018-10-23 20:50:23,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-23 20:50:23,214 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:50:23,215 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:50:23,218 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:50:23,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:50:23,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1884671582, now seen corresponding path program 1 times [2018-10-23 20:50:23,225 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:50:23,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:50:23,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:50:23,270 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:50:23,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:50:23,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:50:23,889 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 20:50:23,892 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:50:23,892 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 20:50:23,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 20:50:23,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 20:50:23,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-23 20:50:23,916 INFO L87 Difference]: Start difference. First operand 758 states. Second operand 6 states. [2018-10-23 20:50:41,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:50:41,520 INFO L93 Difference]: Finished difference Result 4292 states and 8414 transitions. [2018-10-23 20:50:41,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 20:50:41,523 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2018-10-23 20:50:41,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:50:41,571 INFO L225 Difference]: With dead ends: 4292 [2018-10-23 20:50:41,571 INFO L226 Difference]: Without dead ends: 3521 [2018-10-23 20:50:41,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-23 20:50:41,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3521 states. [2018-10-23 20:50:41,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3521 to 2828. [2018-10-23 20:50:41,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2828 states. [2018-10-23 20:50:41,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 4092 transitions. [2018-10-23 20:50:41,732 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 4092 transitions. Word has length 53 [2018-10-23 20:50:41,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:50:41,733 INFO L481 AbstractCegarLoop]: Abstraction has 2828 states and 4092 transitions. [2018-10-23 20:50:41,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 20:50:41,733 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 4092 transitions. [2018-10-23 20:50:41,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-23 20:50:41,739 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:50:41,740 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:50:41,740 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:50:41,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:50:41,741 INFO L82 PathProgramCache]: Analyzing trace with hash -159985225, now seen corresponding path program 1 times [2018-10-23 20:50:41,741 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:50:41,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:50:41,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:50:41,742 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:50:41,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:50:41,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:50:42,286 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:50:42,286 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:50:42,287 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:50:42,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:50:42,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:50:42,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:50:42,289 INFO L87 Difference]: Start difference. First operand 2828 states and 4092 transitions. Second operand 5 states. [2018-10-23 20:50:53,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:50:53,646 INFO L93 Difference]: Finished difference Result 8418 states and 12613 transitions. [2018-10-23 20:50:53,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 20:50:53,652 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2018-10-23 20:50:53,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:50:53,678 INFO L225 Difference]: With dead ends: 8418 [2018-10-23 20:50:53,678 INFO L226 Difference]: Without dead ends: 5592 [2018-10-23 20:50:53,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-23 20:50:53,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5592 states. [2018-10-23 20:50:53,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5592 to 5592. [2018-10-23 20:50:53,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5592 states. [2018-10-23 20:50:53,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5592 states to 5592 states and 7127 transitions. [2018-10-23 20:50:53,788 INFO L78 Accepts]: Start accepts. Automaton has 5592 states and 7127 transitions. Word has length 147 [2018-10-23 20:50:53,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:50:53,789 INFO L481 AbstractCegarLoop]: Abstraction has 5592 states and 7127 transitions. [2018-10-23 20:50:53,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:50:53,789 INFO L276 IsEmpty]: Start isEmpty. Operand 5592 states and 7127 transitions. [2018-10-23 20:50:53,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-10-23 20:50:53,802 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:50:53,803 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:50:53,803 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:50:53,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:50:53,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1116212699, now seen corresponding path program 1 times [2018-10-23 20:50:53,804 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:50:53,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:50:53,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:50:53,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:50:53,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:50:53,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:50:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-10-23 20:50:54,298 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:50:54,298 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 20:50:54,313 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:50:54,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:50:54,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:50:54,488 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:50:54,517 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:50:54,517 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-10-23 20:50:54,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:50:54,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:50:54,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:50:54,519 INFO L87 Difference]: Start difference. First operand 5592 states and 7127 transitions. Second operand 4 states. [2018-10-23 20:51:02,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:51:02,925 INFO L93 Difference]: Finished difference Result 17417 states and 23373 transitions. [2018-10-23 20:51:02,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:51:02,934 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 236 [2018-10-23 20:51:02,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:51:02,985 INFO L225 Difference]: With dead ends: 17417 [2018-10-23 20:51:02,986 INFO L226 Difference]: Without dead ends: 12518 [2018-10-23 20:51:02,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 236 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 20:51:03,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12518 states. [2018-10-23 20:51:03,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12518 to 7665. [2018-10-23 20:51:03,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7665 states. [2018-10-23 20:51:03,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7665 states to 7665 states and 9557 transitions. [2018-10-23 20:51:03,159 INFO L78 Accepts]: Start accepts. Automaton has 7665 states and 9557 transitions. Word has length 236 [2018-10-23 20:51:03,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:51:03,161 INFO L481 AbstractCegarLoop]: Abstraction has 7665 states and 9557 transitions. [2018-10-23 20:51:03,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:51:03,163 INFO L276 IsEmpty]: Start isEmpty. Operand 7665 states and 9557 transitions. [2018-10-23 20:51:03,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2018-10-23 20:51:03,170 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:51:03,170 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, 3, 3, 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] [2018-10-23 20:51:03,171 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:51:03,171 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:51:03,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1085335796, now seen corresponding path program 1 times [2018-10-23 20:51:03,171 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:51:03,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:51:03,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:51:03,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:51:03,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:51:03,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:51:03,631 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:51:03,631 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:51:03,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:51:03,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:51:03,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:51:03,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:51:03,633 INFO L87 Difference]: Start difference. First operand 7665 states and 9557 transitions. Second operand 4 states. [2018-10-23 20:51:09,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:51:09,838 INFO L93 Difference]: Finished difference Result 17401 states and 21937 transitions. [2018-10-23 20:51:09,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:51:09,838 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 306 [2018-10-23 20:51:09,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:51:09,870 INFO L225 Difference]: With dead ends: 17401 [2018-10-23 20:51:09,870 INFO L226 Difference]: Without dead ends: 9046 [2018-10-23 20:51:09,879 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 20:51:09,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9046 states. [2018-10-23 20:51:10,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9046 to 9046. [2018-10-23 20:51:10,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9046 states. [2018-10-23 20:51:10,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9046 states to 9046 states and 10795 transitions. [2018-10-23 20:51:10,032 INFO L78 Accepts]: Start accepts. Automaton has 9046 states and 10795 transitions. Word has length 306 [2018-10-23 20:51:10,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:51:10,033 INFO L481 AbstractCegarLoop]: Abstraction has 9046 states and 10795 transitions. [2018-10-23 20:51:10,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:51:10,033 INFO L276 IsEmpty]: Start isEmpty. Operand 9046 states and 10795 transitions. [2018-10-23 20:51:10,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2018-10-23 20:51:10,038 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:51:10,038 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:51:10,039 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:51:10,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:51:10,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1773253513, now seen corresponding path program 1 times [2018-10-23 20:51:10,039 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:51:10,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:51:10,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:51:10,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:51:10,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:51:10,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:51:10,565 WARN L179 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-10-23 20:51:10,941 WARN L179 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 14 [2018-10-23 20:51:11,113 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 200 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:51:11,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:51:11,114 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 20:51:11,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:51:11,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:51:11,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:51:11,363 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2018-10-23 20:51:11,384 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:51:11,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2018-10-23 20:51:11,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 20:51:11,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 20:51:11,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-23 20:51:11,386 INFO L87 Difference]: Start difference. First operand 9046 states and 10795 transitions. Second operand 6 states. [2018-10-23 20:51:22,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:51:22,038 INFO L93 Difference]: Finished difference Result 29848 states and 35478 transitions. [2018-10-23 20:51:22,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 20:51:22,045 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 340 [2018-10-23 20:51:22,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:51:22,090 INFO L225 Difference]: With dead ends: 29848 [2018-10-23 20:51:22,090 INFO L226 Difference]: Without dead ends: 18032 [2018-10-23 20:51:22,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 339 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-10-23 20:51:22,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18032 states. [2018-10-23 20:51:22,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18032 to 13188. [2018-10-23 20:51:22,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13188 states. [2018-10-23 20:51:22,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13188 states to 13188 states and 14343 transitions. [2018-10-23 20:51:22,305 INFO L78 Accepts]: Start accepts. Automaton has 13188 states and 14343 transitions. Word has length 340 [2018-10-23 20:51:22,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:51:22,305 INFO L481 AbstractCegarLoop]: Abstraction has 13188 states and 14343 transitions. [2018-10-23 20:51:22,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 20:51:22,306 INFO L276 IsEmpty]: Start isEmpty. Operand 13188 states and 14343 transitions. [2018-10-23 20:51:22,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1037 [2018-10-23 20:51:22,341 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:51:22,343 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, 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, 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 20:51:22,343 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:51:22,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:51:22,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1023982483, now seen corresponding path program 1 times [2018-10-23 20:51:22,344 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:51:22,344 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:51:22,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:51:22,345 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:51:22,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:51:22,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:51:23,275 WARN L179 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-10-23 20:51:24,074 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 558 proven. 0 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2018-10-23 20:51:24,075 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:51:24,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:51:24,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:51:24,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:51:24,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:51:24,077 INFO L87 Difference]: Start difference. First operand 13188 states and 14343 transitions. Second operand 4 states. [2018-10-23 20:51:33,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:51:33,331 INFO L93 Difference]: Finished difference Result 45031 states and 49532 transitions. [2018-10-23 20:51:33,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:51:33,332 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1036 [2018-10-23 20:51:33,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:51:33,379 INFO L225 Difference]: With dead ends: 45031 [2018-10-23 20:51:33,379 INFO L226 Difference]: Without dead ends: 31842 [2018-10-23 20:51:33,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:51:33,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31842 states. [2018-10-23 20:51:33,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31842 to 30460. [2018-10-23 20:51:33,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30460 states. [2018-10-23 20:51:33,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30460 states to 30460 states and 32826 transitions. [2018-10-23 20:51:33,725 INFO L78 Accepts]: Start accepts. Automaton has 30460 states and 32826 transitions. Word has length 1036 [2018-10-23 20:51:33,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:51:33,727 INFO L481 AbstractCegarLoop]: Abstraction has 30460 states and 32826 transitions. [2018-10-23 20:51:33,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:51:33,727 INFO L276 IsEmpty]: Start isEmpty. Operand 30460 states and 32826 transitions. [2018-10-23 20:51:33,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1051 [2018-10-23 20:51:33,769 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:51:33,770 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, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 20:51:33,770 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:51:33,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:51:33,771 INFO L82 PathProgramCache]: Analyzing trace with hash -919672874, now seen corresponding path program 1 times [2018-10-23 20:51:33,771 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:51:33,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:51:33,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:51:33,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:51:33,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:51:33,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:51:35,103 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 477 proven. 0 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2018-10-23 20:51:35,104 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:51:35,104 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:51:35,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 20:51:35,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 20:51:35,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:51:35,106 INFO L87 Difference]: Start difference. First operand 30460 states and 32826 transitions. Second operand 3 states. [2018-10-23 20:51:38,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:51:38,001 INFO L93 Difference]: Finished difference Result 62300 states and 67186 transitions. [2018-10-23 20:51:38,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 20:51:38,002 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1050 [2018-10-23 20:51:38,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:51:38,047 INFO L225 Difference]: With dead ends: 62300 [2018-10-23 20:51:38,047 INFO L226 Difference]: Without dead ends: 32533 [2018-10-23 20:51:38,075 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:51:38,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32533 states. [2018-10-23 20:51:38,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32533 to 32533. [2018-10-23 20:51:38,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32533 states. [2018-10-23 20:51:38,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32533 states to 32533 states and 34929 transitions. [2018-10-23 20:51:38,421 INFO L78 Accepts]: Start accepts. Automaton has 32533 states and 34929 transitions. Word has length 1050 [2018-10-23 20:51:38,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:51:38,423 INFO L481 AbstractCegarLoop]: Abstraction has 32533 states and 34929 transitions. [2018-10-23 20:51:38,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 20:51:38,423 INFO L276 IsEmpty]: Start isEmpty. Operand 32533 states and 34929 transitions. [2018-10-23 20:51:38,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1079 [2018-10-23 20:51:38,441 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:51:38,442 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, 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, 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 20:51:38,443 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:51:38,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:51:38,443 INFO L82 PathProgramCache]: Analyzing trace with hash 801899915, now seen corresponding path program 1 times [2018-10-23 20:51:38,443 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:51:38,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:51:38,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:51:38,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:51:38,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:51:38,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:51:39,283 WARN L179 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2018-10-23 20:51:39,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 649 proven. 0 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2018-10-23 20:51:39,970 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:51:39,970 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:51:39,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:51:39,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:51:39,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:51:39,972 INFO L87 Difference]: Start difference. First operand 32533 states and 34929 transitions. Second operand 4 states. [2018-10-23 20:51:45,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:51:45,078 INFO L93 Difference]: Finished difference Result 69901 states and 75440 transitions. [2018-10-23 20:51:45,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:51:45,079 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1078 [2018-10-23 20:51:45,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:51:45,126 INFO L225 Difference]: With dead ends: 69901 [2018-10-23 20:51:45,126 INFO L226 Difference]: Without dead ends: 37367 [2018-10-23 20:51:45,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:51:45,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37367 states. [2018-10-23 20:51:45,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37367 to 37367. [2018-10-23 20:51:45,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37367 states. [2018-10-23 20:51:45,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37367 states to 37367 states and 40066 transitions. [2018-10-23 20:51:45,526 INFO L78 Accepts]: Start accepts. Automaton has 37367 states and 40066 transitions. Word has length 1078 [2018-10-23 20:51:45,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:51:45,527 INFO L481 AbstractCegarLoop]: Abstraction has 37367 states and 40066 transitions. [2018-10-23 20:51:45,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:51:45,527 INFO L276 IsEmpty]: Start isEmpty. Operand 37367 states and 40066 transitions. [2018-10-23 20:51:45,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1129 [2018-10-23 20:51:45,547 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:51:45,548 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, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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 20:51:45,549 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:51:45,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:51:45,549 INFO L82 PathProgramCache]: Analyzing trace with hash 949946755, now seen corresponding path program 1 times [2018-10-23 20:51:45,549 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:51:45,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:51:45,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:51:45,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:51:45,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:51:45,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:51:49,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 471 proven. 752 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-10-23 20:51:49,387 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:51:49,387 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 20:51:49,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:51:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:51:49,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:51:50,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 616 proven. 0 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2018-10-23 20:51:50,324 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:51:50,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2018-10-23 20:51:50,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-23 20:51:50,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-23 20:51:50,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-10-23 20:51:50,327 INFO L87 Difference]: Start difference. First operand 37367 states and 40066 transitions. Second operand 12 states. [2018-10-23 20:52:09,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:52:09,634 INFO L93 Difference]: Finished difference Result 109053 states and 118617 transitions. [2018-10-23 20:52:09,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-23 20:52:09,634 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 1128 [2018-10-23 20:52:09,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:52:09,715 INFO L225 Difference]: With dead ends: 109053 [2018-10-23 20:52:09,715 INFO L226 Difference]: Without dead ends: 72379 [2018-10-23 20:52:09,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1171 GetRequests, 1141 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=241, Invalid=629, Unknown=0, NotChecked=0, Total=870 [2018-10-23 20:52:09,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72379 states. [2018-10-23 20:52:10,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72379 to 50496. [2018-10-23 20:52:10,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50496 states. [2018-10-23 20:52:10,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50496 states to 50496 states and 54053 transitions. [2018-10-23 20:52:10,382 INFO L78 Accepts]: Start accepts. Automaton has 50496 states and 54053 transitions. Word has length 1128 [2018-10-23 20:52:10,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:52:10,383 INFO L481 AbstractCegarLoop]: Abstraction has 50496 states and 54053 transitions. [2018-10-23 20:52:10,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-23 20:52:10,384 INFO L276 IsEmpty]: Start isEmpty. Operand 50496 states and 54053 transitions. [2018-10-23 20:52:10,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1129 [2018-10-23 20:52:10,400 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:52:10,401 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, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:52:10,401 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:52:10,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:52:10,402 INFO L82 PathProgramCache]: Analyzing trace with hash -463347198, now seen corresponding path program 1 times [2018-10-23 20:52:10,402 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:52:10,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:52:10,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:52:10,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:52:10,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:52:10,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:52:11,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1289 backedges. 521 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2018-10-23 20:52:11,488 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:52:11,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:52:11,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:52:11,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:52:11,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:52:11,490 INFO L87 Difference]: Start difference. First operand 50496 states and 54053 transitions. Second operand 4 states. [2018-10-23 20:52:19,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:52:19,598 INFO L93 Difference]: Finished difference Result 107900 states and 116079 transitions. [2018-10-23 20:52:19,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:52:19,598 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1128 [2018-10-23 20:52:19,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:52:19,659 INFO L225 Difference]: With dead ends: 107900 [2018-10-23 20:52:19,659 INFO L226 Difference]: Without dead ends: 52549 [2018-10-23 20:52:19,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 2 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 20:52:19,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52549 states. [2018-10-23 20:52:20,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52549 to 51167. [2018-10-23 20:52:20,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51167 states. [2018-10-23 20:52:20,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51167 states to 51167 states and 53884 transitions. [2018-10-23 20:52:20,137 INFO L78 Accepts]: Start accepts. Automaton has 51167 states and 53884 transitions. Word has length 1128 [2018-10-23 20:52:20,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:52:20,138 INFO L481 AbstractCegarLoop]: Abstraction has 51167 states and 53884 transitions. [2018-10-23 20:52:20,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:52:20,138 INFO L276 IsEmpty]: Start isEmpty. Operand 51167 states and 53884 transitions. [2018-10-23 20:52:20,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1145 [2018-10-23 20:52:20,154 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:52:20,155 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, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-23 20:52:20,156 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:52:20,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:52:20,156 INFO L82 PathProgramCache]: Analyzing trace with hash -57160703, now seen corresponding path program 1 times [2018-10-23 20:52:20,156 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:52:20,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:52:20,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:52:20,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:52:20,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:52:20,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:52:21,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1137 backedges. 665 proven. 0 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2018-10-23 20:52:21,615 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:52:21,615 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:52:21,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:52:21,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:52:21,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:52:21,617 INFO L87 Difference]: Start difference. First operand 51167 states and 53884 transitions. Second operand 4 states. [2018-10-23 20:52:26,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:52:26,930 INFO L93 Difference]: Finished difference Result 135509 states and 143194 transitions. [2018-10-23 20:52:26,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:52:26,930 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1144 [2018-10-23 20:52:26,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:52:27,017 INFO L225 Difference]: With dead ends: 135509 [2018-10-23 20:52:27,017 INFO L226 Difference]: Without dead ends: 85035 [2018-10-23 20:52:27,051 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 20:52:27,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85035 states. [2018-10-23 20:52:27,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85035 to 85033. [2018-10-23 20:52:27,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85033 states. [2018-10-23 20:52:27,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85033 states to 85033 states and 89073 transitions. [2018-10-23 20:52:27,802 INFO L78 Accepts]: Start accepts. Automaton has 85033 states and 89073 transitions. Word has length 1144 [2018-10-23 20:52:27,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:52:27,802 INFO L481 AbstractCegarLoop]: Abstraction has 85033 states and 89073 transitions. [2018-10-23 20:52:27,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:52:27,803 INFO L276 IsEmpty]: Start isEmpty. Operand 85033 states and 89073 transitions. [2018-10-23 20:52:27,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1182 [2018-10-23 20:52:27,819 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:52:27,819 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, 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, 4, 4, 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 20:52:27,820 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:52:27,820 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:52:27,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1206864501, now seen corresponding path program 1 times [2018-10-23 20:52:27,820 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:52:27,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:52:27,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:52:27,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:52:27,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:52:27,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:52:28,904 WARN L179 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 7 [2018-10-23 20:52:29,270 WARN L179 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2018-10-23 20:52:33,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1419 backedges. 675 proven. 499 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2018-10-23 20:52:33,181 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:52:33,182 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 20:52:33,189 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:52:33,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:52:33,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:52:34,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1419 backedges. 254 proven. 0 refuted. 0 times theorem prover too weak. 1165 trivial. 0 not checked. [2018-10-23 20:52:34,848 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:52:34,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [11] total 12 [2018-10-23 20:52:34,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-23 20:52:34,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-23 20:52:34,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2018-10-23 20:52:34,850 INFO L87 Difference]: Start difference. First operand 85033 states and 89073 transitions. Second operand 13 states. [2018-10-23 20:52:54,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:52:54,028 INFO L93 Difference]: Finished difference Result 188056 states and 196736 transitions. [2018-10-23 20:52:54,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-23 20:52:54,029 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 1181 [2018-10-23 20:52:54,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:52:54,125 INFO L225 Difference]: With dead ends: 188056 [2018-10-23 20:52:54,125 INFO L226 Difference]: Without dead ends: 96101 [2018-10-23 20:52:54,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1205 GetRequests, 1181 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=198, Invalid=452, Unknown=0, NotChecked=0, Total=650 [2018-10-23 20:52:54,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96101 states. [2018-10-23 20:52:54,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96101 to 91243. [2018-10-23 20:52:54,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91243 states. [2018-10-23 20:52:54,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91243 states to 91243 states and 94645 transitions. [2018-10-23 20:52:54,878 INFO L78 Accepts]: Start accepts. Automaton has 91243 states and 94645 transitions. Word has length 1181 [2018-10-23 20:52:54,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:52:54,879 INFO L481 AbstractCegarLoop]: Abstraction has 91243 states and 94645 transitions. [2018-10-23 20:52:54,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-23 20:52:54,879 INFO L276 IsEmpty]: Start isEmpty. Operand 91243 states and 94645 transitions. [2018-10-23 20:52:54,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1198 [2018-10-23 20:52:54,892 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:52:54,892 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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 20:52:54,893 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:52:54,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:52:54,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1072137315, now seen corresponding path program 1 times [2018-10-23 20:52:54,893 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:52:54,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:52:54,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:52:54,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:52:54,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:52:54,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:52:56,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 838 proven. 0 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2018-10-23 20:52:56,478 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:52:56,478 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:52:56,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:52:56,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:52:56,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:52:56,480 INFO L87 Difference]: Start difference. First operand 91243 states and 94645 transitions. Second operand 4 states. [2018-10-23 20:53:02,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:53:02,669 INFO L93 Difference]: Finished difference Result 217041 states and 225289 transitions. [2018-10-23 20:53:02,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:53:02,669 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1197 [2018-10-23 20:53:02,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:53:03,169 INFO L225 Difference]: With dead ends: 217041 [2018-10-23 20:53:03,170 INFO L226 Difference]: Without dead ends: 122336 [2018-10-23 20:53:03,203 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 20:53:03,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122336 states. [2018-10-23 20:53:03,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122336 to 107128. [2018-10-23 20:53:03,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107128 states. [2018-10-23 20:53:04,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107128 states to 107128 states and 110471 transitions. [2018-10-23 20:53:04,046 INFO L78 Accepts]: Start accepts. Automaton has 107128 states and 110471 transitions. Word has length 1197 [2018-10-23 20:53:04,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:53:04,047 INFO L481 AbstractCegarLoop]: Abstraction has 107128 states and 110471 transitions. [2018-10-23 20:53:04,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:53:04,047 INFO L276 IsEmpty]: Start isEmpty. Operand 107128 states and 110471 transitions. [2018-10-23 20:53:04,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1212 [2018-10-23 20:53:04,058 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:53:04,059 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, 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, 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 20:53:04,059 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:53:04,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:53:04,059 INFO L82 PathProgramCache]: Analyzing trace with hash 969939361, now seen corresponding path program 1 times [2018-10-23 20:53:04,060 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:53:04,060 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:53:04,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:53:04,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:53:04,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:53:04,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:53:05,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1530 backedges. 629 proven. 0 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2018-10-23 20:53:05,492 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:53:05,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:53:05,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:53:05,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:53:05,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:53:05,493 INFO L87 Difference]: Start difference. First operand 107128 states and 110471 transitions. Second operand 4 states. [2018-10-23 20:53:10,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:53:10,328 INFO L93 Difference]: Finished difference Result 233602 states and 240931 transitions. [2018-10-23 20:53:10,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:53:10,329 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1211 [2018-10-23 20:53:10,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:53:10,443 INFO L225 Difference]: With dead ends: 233602 [2018-10-23 20:53:10,443 INFO L226 Difference]: Without dead ends: 123707 [2018-10-23 20:53:10,491 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 20:53:10,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123707 states. [2018-10-23 20:53:11,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123707 to 119561. [2018-10-23 20:53:11,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119561 states. [2018-10-23 20:53:11,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119561 states to 119561 states and 122869 transitions. [2018-10-23 20:53:11,440 INFO L78 Accepts]: Start accepts. Automaton has 119561 states and 122869 transitions. Word has length 1211 [2018-10-23 20:53:11,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:53:11,441 INFO L481 AbstractCegarLoop]: Abstraction has 119561 states and 122869 transitions. [2018-10-23 20:53:11,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:53:11,441 INFO L276 IsEmpty]: Start isEmpty. Operand 119561 states and 122869 transitions. [2018-10-23 20:53:11,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1248 [2018-10-23 20:53:11,836 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:53:11,837 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, 8, 8, 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 20:53:11,837 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:53:11,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:53:11,838 INFO L82 PathProgramCache]: Analyzing trace with hash -200433740, now seen corresponding path program 1 times [2018-10-23 20:53:11,838 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:53:11,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:53:11,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:53:11,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:53:11,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:53:11,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:53:15,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 847 proven. 1055 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2018-10-23 20:53:15,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:53:15,751 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 20:53:15,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:53:16,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:53:16,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:53:17,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1089 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2018-10-23 20:53:17,183 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:53:17,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2018-10-23 20:53:17,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-23 20:53:17,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-23 20:53:17,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-10-23 20:53:17,186 INFO L87 Difference]: Start difference. First operand 119561 states and 122869 transitions. Second operand 12 states. [2018-10-23 20:53:33,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:53:33,713 INFO L93 Difference]: Finished difference Result 276718 states and 284415 transitions. [2018-10-23 20:53:33,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-23 20:53:33,714 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 1247 [2018-10-23 20:53:33,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:53:33,855 INFO L225 Difference]: With dead ends: 276718 [2018-10-23 20:53:33,855 INFO L226 Difference]: Without dead ends: 157850 [2018-10-23 20:53:33,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1285 GetRequests, 1258 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2018-10-23 20:53:33,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157850 states. [2018-10-23 20:53:34,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157850 to 114029. [2018-10-23 20:53:34,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114029 states. [2018-10-23 20:53:35,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114029 states to 114029 states and 116190 transitions. [2018-10-23 20:53:35,037 INFO L78 Accepts]: Start accepts. Automaton has 114029 states and 116190 transitions. Word has length 1247 [2018-10-23 20:53:35,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:53:35,038 INFO L481 AbstractCegarLoop]: Abstraction has 114029 states and 116190 transitions. [2018-10-23 20:53:35,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-23 20:53:35,038 INFO L276 IsEmpty]: Start isEmpty. Operand 114029 states and 116190 transitions. [2018-10-23 20:53:35,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1283 [2018-10-23 20:53:35,053 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:53:35,054 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:53:35,054 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:53:35,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:53:35,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1866356196, now seen corresponding path program 1 times [2018-10-23 20:53:35,055 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:53:35,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:53:35,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:53:35,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:53:35,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:53:35,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:53:35,772 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-10-23 20:53:36,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1401 backedges. 486 proven. 0 refuted. 0 times theorem prover too weak. 915 trivial. 0 not checked. [2018-10-23 20:53:36,960 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:53:36,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:53:36,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:53:36,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:53:36,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:53:36,961 INFO L87 Difference]: Start difference. First operand 114029 states and 116190 transitions. Second operand 4 states. [2018-10-23 20:53:41,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:53:41,926 INFO L93 Difference]: Finished difference Result 228746 states and 233184 transitions. [2018-10-23 20:53:41,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:53:41,927 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1282 [2018-10-23 20:53:41,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:53:42,042 INFO L225 Difference]: With dead ends: 228746 [2018-10-23 20:53:42,042 INFO L226 Difference]: Without dead ends: 111950 [2018-10-23 20:53:42,090 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 20:53:42,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111950 states. [2018-10-23 20:53:42,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111950 to 109186. [2018-10-23 20:53:42,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109186 states. [2018-10-23 20:53:42,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109186 states to 109186 states and 111046 transitions. [2018-10-23 20:53:42,906 INFO L78 Accepts]: Start accepts. Automaton has 109186 states and 111046 transitions. Word has length 1282 [2018-10-23 20:53:42,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:53:42,907 INFO L481 AbstractCegarLoop]: Abstraction has 109186 states and 111046 transitions. [2018-10-23 20:53:42,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:53:42,907 INFO L276 IsEmpty]: Start isEmpty. Operand 109186 states and 111046 transitions. [2018-10-23 20:53:42,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1306 [2018-10-23 20:53:42,920 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:53:42,921 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, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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 20:53:42,921 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:53:42,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:53:42,922 INFO L82 PathProgramCache]: Analyzing trace with hash 930754700, now seen corresponding path program 1 times [2018-10-23 20:53:42,922 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:53:42,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:53:42,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:53:42,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:53:42,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:53:43,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:53:44,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1778 backedges. 1041 proven. 159 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2018-10-23 20:53:44,508 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:53:44,508 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 20:53:44,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:53:44,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:53:44,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:53:46,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1778 backedges. 1041 proven. 159 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2018-10-23 20:53:46,339 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 20:53:46,339 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2018-10-23 20:53:46,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 20:53:46,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 20:53:46,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-10-23 20:53:46,341 INFO L87 Difference]: Start difference. First operand 109186 states and 111046 transitions. Second operand 7 states. [2018-10-23 20:54:00,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:54:00,629 INFO L93 Difference]: Finished difference Result 242555 states and 246737 transitions. [2018-10-23 20:54:00,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-23 20:54:00,629 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1305 [2018-10-23 20:54:00,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:54:00,755 INFO L225 Difference]: With dead ends: 242555 [2018-10-23 20:54:00,755 INFO L226 Difference]: Without dead ends: 131988 [2018-10-23 20:54:00,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1316 GetRequests, 1307 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-10-23 20:54:00,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131988 states. [2018-10-23 20:54:02,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131988 to 111949. [2018-10-23 20:54:02,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111949 states. [2018-10-23 20:54:02,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111949 states to 111949 states and 113475 transitions. [2018-10-23 20:54:02,251 INFO L78 Accepts]: Start accepts. Automaton has 111949 states and 113475 transitions. Word has length 1305 [2018-10-23 20:54:02,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:54:02,251 INFO L481 AbstractCegarLoop]: Abstraction has 111949 states and 113475 transitions. [2018-10-23 20:54:02,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 20:54:02,252 INFO L276 IsEmpty]: Start isEmpty. Operand 111949 states and 113475 transitions. [2018-10-23 20:54:02,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1431 [2018-10-23 20:54:02,274 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:54:02,274 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 1] [2018-10-23 20:54:02,274 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:54:02,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:54:02,275 INFO L82 PathProgramCache]: Analyzing trace with hash 351258304, now seen corresponding path program 1 times [2018-10-23 20:54:02,275 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:54:02,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:54:02,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:54:02,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:54:02,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:54:02,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:54:03,174 WARN L179 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 Received shutdown request... [2018-10-23 20:54:04,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2393 backedges. 1659 proven. 105 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2018-10-23 20:54:04,477 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:54:04,477 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:54:04,484 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:54:04,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:54:04,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:54:04,855 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-23 20:54:05,056 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:54:05,057 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 20:54:05,063 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 20:54:05,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:54:05 BoogieIcfgContainer [2018-10-23 20:54:05,063 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 20:54:05,064 INFO L168 Benchmark]: Toolchain (without parser) took 232305.10 ms. Allocated memory was 1.5 GB in the beginning and 3.9 GB in the end (delta: 2.4 GB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 323.5 MB). Peak memory consumption was 2.7 GB. Max. memory is 7.1 GB. [2018-10-23 20:54:05,066 INFO L168 Benchmark]: CDTParser took 0.98 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 20:54:05,066 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1715.46 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 20:54:05,067 INFO L168 Benchmark]: Boogie Procedure Inliner took 453.49 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 794.3 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -959.9 MB). Peak memory consumption was 45.1 MB. Max. memory is 7.1 GB. [2018-10-23 20:54:05,069 INFO L168 Benchmark]: Boogie Preprocessor took 279.98 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: 40.6 MB). Peak memory consumption was 40.6 MB. Max. memory is 7.1 GB. [2018-10-23 20:54:05,070 INFO L168 Benchmark]: RCFGBuilder took 7861.90 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 516.1 MB). Peak memory consumption was 516.1 MB. Max. memory is 7.1 GB. [2018-10-23 20:54:05,070 INFO L168 Benchmark]: TraceAbstraction took 221989.04 ms. Allocated memory was 2.3 GB in the beginning and 3.9 GB in the end (delta: 1.6 GB). Free memory was 1.7 GB in the beginning and 1.1 GB in the end (delta: 578.7 MB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. [2018-10-23 20:54:05,076 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.98 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 1715.46 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 453.49 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 794.3 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -959.9 MB). Peak memory consumption was 45.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 279.98 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: 40.6 MB). Peak memory consumption was 40.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 7861.90 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 516.1 MB). Peak memory consumption was 516.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 221989.04 ms. Allocated memory was 2.3 GB in the beginning and 3.9 GB in the end (delta: 1.6 GB). Free memory was 1.7 GB in the beginning and 1.1 GB in the end (delta: 578.7 MB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 165]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 165). Cancelled while BasicCegarLoop was analyzing trace of length 1431 with TraceHistMax 7,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 5 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 758 locations, 1 error locations. TIMEOUT Result, 221.9s OverallTime, 18 OverallIterations, 8 TraceHistogramMax, 172.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 9322 SDtfs, 62147 SDslu, 2260 SDs, 0 SdLazy, 116180 SolverSat, 16474 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 134.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5615 GetRequests, 5483 SyntacticMatches, 13 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 7.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=119561occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 9.5s AutomataMinimizationTime, 17 MinimizatonAttempts, 125875 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 16.4s InterpolantComputationTime, 20506 NumberOfCodeBlocks, 20506 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 20483 ConstructedInterpolants, 0 QuantifiedInterpolants, 65326768 SizeOfPredicates, 4 NumberOfNonLiveVariables, 6341 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 23 InterpolantComputations, 16 PerfectInterpolantSequences, 20989/23621 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown