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/Problem16_label18_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 18:20:00,258 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 18:20:00,260 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 18:20:00,277 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 18:20:00,278 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 18:20:00,279 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 18:20:00,281 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 18:20:00,283 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 18:20:00,286 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 18:20:00,286 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 18:20:00,288 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 18:20:00,289 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 18:20:00,290 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 18:20:00,291 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 18:20:00,299 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 18:20:00,300 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 18:20:00,302 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 18:20:00,305 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 18:20:00,308 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 18:20:00,310 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 18:20:00,312 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 18:20:00,313 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 18:20:00,317 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-23 18:20:00,317 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-23 18:20:00,318 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-23 18:20:00,319 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-23 18:20:00,319 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-23 18:20:00,320 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-23 18:20:00,324 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-23 18:20:00,326 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-23 18:20:00,326 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-23 18:20:00,326 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-23 18:20:00,329 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-23 18:20:00,355 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 18:20:00,359 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 18:20:00,360 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 18:20:00,360 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 18:20:00,360 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 18:20:00,363 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 18:20:00,363 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 18:20:00,363 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 18:20:00,364 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 18:20:00,364 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 18:20:00,364 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 18:20:00,364 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 18:20:00,365 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 18:20:00,365 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 18:20:00,365 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 18:20:00,365 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 18:20:00,365 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 18:20:00,365 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 18:20:00,366 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 18:20:00,366 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 18:20:00,366 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 18:20:00,366 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 18:20:00,366 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 18:20:00,367 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 18:20:00,368 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 18:20:00,368 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 18:20:00,368 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 18:20:00,369 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 18:20:00,425 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 18:20:00,440 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 18:20:00,444 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 18:20:00,445 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 18:20:00,445 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 18:20:00,446 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label18_false-unreach-call.c [2018-10-23 18:20:00,501 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/7fec0c1b2/48bc383cea7f4fd8bd0bacc782616741/FLAG9fdd97801 [2018-10-23 18:20:01,144 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 18:20:01,145 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label18_false-unreach-call.c [2018-10-23 18:20:01,165 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/7fec0c1b2/48bc383cea7f4fd8bd0bacc782616741/FLAG9fdd97801 [2018-10-23 18:20:01,186 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/7fec0c1b2/48bc383cea7f4fd8bd0bacc782616741 [2018-10-23 18:20:01,197 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 18:20:01,199 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 18:20:01,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 18:20:01,200 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 18:20:01,204 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 18:20:01,205 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:20:01" (1/1) ... [2018-10-23 18:20:01,208 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7be7802 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:20:01, skipping insertion in model container [2018-10-23 18:20:01,208 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:20:01" (1/1) ... [2018-10-23 18:20:01,218 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 18:20:01,312 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 18:20:02,120 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 18:20:02,125 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 18:20:02,369 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 18:20:02,392 INFO L193 MainTranslator]: Completed translation [2018-10-23 18:20:02,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:20:02 WrapperNode [2018-10-23 18:20:02,393 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 18:20:02,395 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 18:20:02,395 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 18:20:02,395 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 18:20:02,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:20:02" (1/1) ... [2018-10-23 18:20:02,451 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:20:02" (1/1) ... [2018-10-23 18:20:02,745 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 18:20:02,746 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 18:20:02,746 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 18:20:02,746 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 18:20:02,757 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:20:02" (1/1) ... [2018-10-23 18:20:02,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:20:02" (1/1) ... [2018-10-23 18:20:02,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:20:02" (1/1) ... [2018-10-23 18:20:02,770 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:20:02" (1/1) ... [2018-10-23 18:20:02,837 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:20:02" (1/1) ... [2018-10-23 18:20:02,859 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:20:02" (1/1) ... [2018-10-23 18:20:02,890 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:20:02" (1/1) ... [2018-10-23 18:20:02,940 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 18:20:02,941 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 18:20:02,941 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 18:20:02,941 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 18:20:02,943 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:20:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 18:20:03,016 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-23 18:20:03,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 18:20:03,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 18:20:08,812 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 18:20:08,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:20:08 BoogieIcfgContainer [2018-10-23 18:20:08,814 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 18:20:08,815 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 18:20:08,815 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 18:20:08,820 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 18:20:08,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:20:01" (1/3) ... [2018-10-23 18:20:08,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@af1a492 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:20:08, skipping insertion in model container [2018-10-23 18:20:08,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:20:02" (2/3) ... [2018-10-23 18:20:08,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@af1a492 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:20:08, skipping insertion in model container [2018-10-23 18:20:08,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:20:08" (3/3) ... [2018-10-23 18:20:08,824 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label18_false-unreach-call.c [2018-10-23 18:20:08,835 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 18:20:08,845 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 18:20:08,862 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 18:20:08,912 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 18:20:08,913 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 18:20:08,913 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 18:20:08,913 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 18:20:08,913 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 18:20:08,913 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 18:20:08,914 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 18:20:08,914 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 18:20:08,914 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 18:20:08,947 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states. [2018-10-23 18:20:08,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-23 18:20:08,954 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:20:08,955 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:20:08,957 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:20:08,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:20:08,964 INFO L82 PathProgramCache]: Analyzing trace with hash 150940466, now seen corresponding path program 1 times [2018-10-23 18:20:08,965 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:20:08,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:20:09,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:09,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:20:09,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:09,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:20:09,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:20:09,173 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:20:09,174 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-23 18:20:09,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 18:20:09,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 18:20:09,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 18:20:09,193 INFO L87 Difference]: Start difference. First operand 397 states. Second operand 3 states. [2018-10-23 18:20:12,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:20:12,675 INFO L93 Difference]: Finished difference Result 1125 states and 2106 transitions. [2018-10-23 18:20:12,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 18:20:12,678 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-10-23 18:20:12,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:20:12,707 INFO L225 Difference]: With dead ends: 1125 [2018-10-23 18:20:12,708 INFO L226 Difference]: Without dead ends: 724 [2018-10-23 18:20:12,714 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 18:20:12,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2018-10-23 18:20:12,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 724. [2018-10-23 18:20:12,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 724 states. [2018-10-23 18:20:12,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1139 transitions. [2018-10-23 18:20:12,816 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1139 transitions. Word has length 8 [2018-10-23 18:20:12,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:20:12,817 INFO L481 AbstractCegarLoop]: Abstraction has 724 states and 1139 transitions. [2018-10-23 18:20:12,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 18:20:12,817 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1139 transitions. [2018-10-23 18:20:12,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-23 18:20:12,820 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:20:12,821 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:20:12,821 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:20:12,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:20:12,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1548975917, now seen corresponding path program 1 times [2018-10-23 18:20:12,822 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:20:12,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:20:12,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:12,824 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:20:12,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:12,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:20:13,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:20:13,114 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:20:13,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:20:13,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 18:20:13,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 18:20:13,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 18:20:13,117 INFO L87 Difference]: Start difference. First operand 724 states and 1139 transitions. Second operand 5 states. [2018-10-23 18:20:18,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:20:18,995 INFO L93 Difference]: Finished difference Result 2106 states and 3352 transitions. [2018-10-23 18:20:18,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 18:20:18,996 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2018-10-23 18:20:18,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:20:19,005 INFO L225 Difference]: With dead ends: 2106 [2018-10-23 18:20:19,005 INFO L226 Difference]: Without dead ends: 1384 [2018-10-23 18:20:19,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 18:20:19,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2018-10-23 18:20:19,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1384. [2018-10-23 18:20:19,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1384 states. [2018-10-23 18:20:19,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2023 transitions. [2018-10-23 18:20:19,057 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2023 transitions. Word has length 77 [2018-10-23 18:20:19,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:20:19,057 INFO L481 AbstractCegarLoop]: Abstraction has 1384 states and 2023 transitions. [2018-10-23 18:20:19,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 18:20:19,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2023 transitions. [2018-10-23 18:20:19,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-23 18:20:19,062 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:20:19,062 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:20:19,062 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:20:19,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:20:19,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1640363545, now seen corresponding path program 1 times [2018-10-23 18:20:19,063 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:20:19,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:20:19,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:19,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:20:19,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:19,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:20:19,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:20:19,210 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:20:19,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 18:20:19,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 18:20:19,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 18:20:19,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 18:20:19,214 INFO L87 Difference]: Start difference. First operand 1384 states and 2023 transitions. Second operand 3 states. [2018-10-23 18:20:21,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:20:21,638 INFO L93 Difference]: Finished difference Result 3426 states and 5210 transitions. [2018-10-23 18:20:21,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 18:20:21,639 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 105 [2018-10-23 18:20:21,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:20:21,651 INFO L225 Difference]: With dead ends: 3426 [2018-10-23 18:20:21,652 INFO L226 Difference]: Without dead ends: 2044 [2018-10-23 18:20:21,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 18:20:21,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2018-10-23 18:20:21,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 2044. [2018-10-23 18:20:21,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2044 states. [2018-10-23 18:20:21,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 3021 transitions. [2018-10-23 18:20:21,696 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 3021 transitions. Word has length 105 [2018-10-23 18:20:21,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:20:21,697 INFO L481 AbstractCegarLoop]: Abstraction has 2044 states and 3021 transitions. [2018-10-23 18:20:21,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 18:20:21,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 3021 transitions. [2018-10-23 18:20:21,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-23 18:20:21,702 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:20:21,703 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:20:21,703 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:20:21,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:20:21,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1278773011, now seen corresponding path program 1 times [2018-10-23 18:20:21,704 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:20:21,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:20:21,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:21,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:20:21,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:20:22,152 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2018-10-23 18:20:22,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:20:22,396 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:20:22,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-23 18:20:22,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 18:20:22,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 18:20:22,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-23 18:20:22,397 INFO L87 Difference]: Start difference. First operand 2044 states and 3021 transitions. Second operand 7 states. [2018-10-23 18:20:29,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:20:29,460 INFO L93 Difference]: Finished difference Result 4443 states and 6440 transitions. [2018-10-23 18:20:29,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 18:20:29,461 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 140 [2018-10-23 18:20:29,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:20:29,478 INFO L225 Difference]: With dead ends: 4443 [2018-10-23 18:20:29,478 INFO L226 Difference]: Without dead ends: 2401 [2018-10-23 18:20:29,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-23 18:20:29,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2401 states. [2018-10-23 18:20:29,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2401 to 2374. [2018-10-23 18:20:29,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2374 states. [2018-10-23 18:20:29,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2374 states to 2374 states and 3357 transitions. [2018-10-23 18:20:29,528 INFO L78 Accepts]: Start accepts. Automaton has 2374 states and 3357 transitions. Word has length 140 [2018-10-23 18:20:29,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:20:29,529 INFO L481 AbstractCegarLoop]: Abstraction has 2374 states and 3357 transitions. [2018-10-23 18:20:29,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 18:20:29,530 INFO L276 IsEmpty]: Start isEmpty. Operand 2374 states and 3357 transitions. [2018-10-23 18:20:29,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-10-23 18:20:29,542 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:20:29,543 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:20:29,543 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:20:29,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:20:29,543 INFO L82 PathProgramCache]: Analyzing trace with hash -809539550, now seen corresponding path program 1 times [2018-10-23 18:20:29,544 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:20:29,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:20:29,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:29,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:20:29,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:20:29,829 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:20:29,829 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:20:29,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 18:20:29,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 18:20:29,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 18:20:29,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 18:20:29,831 INFO L87 Difference]: Start difference. First operand 2374 states and 3357 transitions. Second operand 3 states. [2018-10-23 18:20:33,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:20:33,512 INFO L93 Difference]: Finished difference Result 6396 states and 9334 transitions. [2018-10-23 18:20:33,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 18:20:33,513 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 228 [2018-10-23 18:20:33,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:20:33,529 INFO L225 Difference]: With dead ends: 6396 [2018-10-23 18:20:33,529 INFO L226 Difference]: Without dead ends: 3682 [2018-10-23 18:20:33,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 18:20:33,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3682 states. [2018-10-23 18:20:33,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3682 to 3682. [2018-10-23 18:20:33,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3682 states. [2018-10-23 18:20:33,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3682 states to 3682 states and 4179 transitions. [2018-10-23 18:20:33,597 INFO L78 Accepts]: Start accepts. Automaton has 3682 states and 4179 transitions. Word has length 228 [2018-10-23 18:20:33,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:20:33,597 INFO L481 AbstractCegarLoop]: Abstraction has 3682 states and 4179 transitions. [2018-10-23 18:20:33,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 18:20:33,598 INFO L276 IsEmpty]: Start isEmpty. Operand 3682 states and 4179 transitions. [2018-10-23 18:20:33,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-10-23 18:20:33,602 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:20:33,602 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:20:33,603 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:20:33,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:20:33,603 INFO L82 PathProgramCache]: Analyzing trace with hash 2123129909, now seen corresponding path program 1 times [2018-10-23 18:20:33,603 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:20:33,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:20:33,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:33,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:20:33,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:33,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:20:34,059 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-23 18:20:34,378 WARN L179 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-10-23 18:20:35,110 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 11 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:20:35,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:20:35,111 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 18:20:35,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:20:35,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:20:35,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:20:35,503 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2018-10-23 18:20:35,525 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:20:35,525 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 9 [2018-10-23 18:20:35,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-23 18:20:35,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-23 18:20:35,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-10-23 18:20:35,528 INFO L87 Difference]: Start difference. First operand 3682 states and 4179 transitions. Second operand 10 states. [2018-10-23 18:20:43,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:20:43,742 INFO L93 Difference]: Finished difference Result 9358 states and 10578 transitions. [2018-10-23 18:20:43,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-23 18:20:43,743 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 310 [2018-10-23 18:20:43,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:20:43,766 INFO L225 Difference]: With dead ends: 9358 [2018-10-23 18:20:43,767 INFO L226 Difference]: Without dead ends: 6008 [2018-10-23 18:20:43,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2018-10-23 18:20:43,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6008 states. [2018-10-23 18:20:43,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6008 to 5332. [2018-10-23 18:20:43,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5332 states. [2018-10-23 18:20:43,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5332 states to 5332 states and 5915 transitions. [2018-10-23 18:20:43,872 INFO L78 Accepts]: Start accepts. Automaton has 5332 states and 5915 transitions. Word has length 310 [2018-10-23 18:20:43,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:20:43,872 INFO L481 AbstractCegarLoop]: Abstraction has 5332 states and 5915 transitions. [2018-10-23 18:20:43,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-23 18:20:43,873 INFO L276 IsEmpty]: Start isEmpty. Operand 5332 states and 5915 transitions. [2018-10-23 18:20:43,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2018-10-23 18:20:43,879 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:20:43,880 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:20:43,880 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:20:43,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:20:43,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1426683343, now seen corresponding path program 1 times [2018-10-23 18:20:43,881 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:20:43,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:20:43,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:43,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:20:43,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:43,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:20:44,322 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-23 18:20:44,486 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2018-10-23 18:20:44,888 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-10-23 18:20:44,889 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:20:44,889 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 18:20:44,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:20:44,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:20:44,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:20:45,607 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 139 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-23 18:20:45,628 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 18:20:45,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2018-10-23 18:20:45,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-23 18:20:45,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-23 18:20:45,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-23 18:20:45,630 INFO L87 Difference]: Start difference. First operand 5332 states and 5915 transitions. Second operand 8 states. [2018-10-23 18:20:50,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:20:50,188 INFO L93 Difference]: Finished difference Result 11322 states and 12526 transitions. [2018-10-23 18:20:50,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 18:20:50,190 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 403 [2018-10-23 18:20:50,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:20:50,211 INFO L225 Difference]: With dead ends: 11322 [2018-10-23 18:20:50,211 INFO L226 Difference]: Without dead ends: 6322 [2018-10-23 18:20:50,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 402 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-10-23 18:20:50,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6322 states. [2018-10-23 18:20:50,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6322 to 5992. [2018-10-23 18:20:50,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5992 states. [2018-10-23 18:20:50,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5992 states to 5992 states and 6548 transitions. [2018-10-23 18:20:50,310 INFO L78 Accepts]: Start accepts. Automaton has 5992 states and 6548 transitions. Word has length 403 [2018-10-23 18:20:50,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:20:50,310 INFO L481 AbstractCegarLoop]: Abstraction has 5992 states and 6548 transitions. [2018-10-23 18:20:50,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-23 18:20:50,311 INFO L276 IsEmpty]: Start isEmpty. Operand 5992 states and 6548 transitions. [2018-10-23 18:20:50,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 808 [2018-10-23 18:20:50,335 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:20:50,336 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 18:20:50,336 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:20:50,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:20:50,337 INFO L82 PathProgramCache]: Analyzing trace with hash 613011524, now seen corresponding path program 1 times [2018-10-23 18:20:50,337 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:20:50,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:20:50,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:50,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:20:50,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:20:51,101 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-23 18:20:51,435 WARN L179 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2018-10-23 18:20:52,075 WARN L179 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 16 [2018-10-23 18:20:52,551 WARN L179 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 21 [2018-10-23 18:20:52,921 WARN L179 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 10 [2018-10-23 18:20:54,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 812 proven. 65 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2018-10-23 18:20:54,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:20:54,312 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 18:20:54,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:20:54,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:20:54,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:20:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 767 proven. 0 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2018-10-23 18:20:54,973 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:20:54,973 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2018-10-23 18:20:54,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 18:20:54,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 18:20:54,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-23 18:20:54,975 INFO L87 Difference]: Start difference. First operand 5992 states and 6548 transitions. Second operand 9 states. [2018-10-23 18:21:02,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:21:02,013 INFO L93 Difference]: Finished difference Result 18264 states and 20085 transitions. [2018-10-23 18:21:02,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-23 18:21:02,013 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 807 [2018-10-23 18:21:02,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:21:02,046 INFO L225 Difference]: With dead ends: 18264 [2018-10-23 18:21:02,046 INFO L226 Difference]: Without dead ends: 10948 [2018-10-23 18:21:02,053 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 827 GetRequests, 812 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-10-23 18:21:02,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10948 states. [2018-10-23 18:21:02,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10948 to 9616. [2018-10-23 18:21:02,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9616 states. [2018-10-23 18:21:02,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9616 states to 9616 states and 10537 transitions. [2018-10-23 18:21:02,183 INFO L78 Accepts]: Start accepts. Automaton has 9616 states and 10537 transitions. Word has length 807 [2018-10-23 18:21:02,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:21:02,184 INFO L481 AbstractCegarLoop]: Abstraction has 9616 states and 10537 transitions. [2018-10-23 18:21:02,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-23 18:21:02,184 INFO L276 IsEmpty]: Start isEmpty. Operand 9616 states and 10537 transitions. [2018-10-23 18:21:02,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 925 [2018-10-23 18:21:02,224 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:21:02,224 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:21:02,225 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:21:02,225 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:21:02,225 INFO L82 PathProgramCache]: Analyzing trace with hash -295618710, now seen corresponding path program 1 times [2018-10-23 18:21:02,225 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:21:02,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:21:02,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:21:02,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:21:02,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:21:02,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:21:02,868 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-23 18:21:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1363 backedges. 617 proven. 283 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2018-10-23 18:21:03,715 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:21:03,715 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 18:21:03,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:21:03,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:21:03,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:21:04,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1363 backedges. 691 proven. 0 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2018-10-23 18:21:04,460 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:21:04,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2018-10-23 18:21:04,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 18:21:04,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 18:21:04,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-10-23 18:21:04,462 INFO L87 Difference]: Start difference. First operand 9616 states and 10537 transitions. Second operand 9 states. [2018-10-23 18:21:06,348 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 8 [2018-10-23 18:21:07,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:21:07,659 INFO L93 Difference]: Finished difference Result 19000 states and 20840 transitions. [2018-10-23 18:21:07,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 18:21:07,664 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 924 [2018-10-23 18:21:07,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:21:07,681 INFO L225 Difference]: With dead ends: 19000 [2018-10-23 18:21:07,681 INFO L226 Difference]: Without dead ends: 9716 [2018-10-23 18:21:07,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 935 GetRequests, 925 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-10-23 18:21:07,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9716 states. [2018-10-23 18:21:07,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9716 to 9616. [2018-10-23 18:21:07,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9616 states. [2018-10-23 18:21:07,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9616 states to 9616 states and 10354 transitions. [2018-10-23 18:21:07,801 INFO L78 Accepts]: Start accepts. Automaton has 9616 states and 10354 transitions. Word has length 924 [2018-10-23 18:21:07,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:21:07,803 INFO L481 AbstractCegarLoop]: Abstraction has 9616 states and 10354 transitions. [2018-10-23 18:21:07,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-23 18:21:07,804 INFO L276 IsEmpty]: Start isEmpty. Operand 9616 states and 10354 transitions. [2018-10-23 18:21:07,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1162 [2018-10-23 18:21:07,825 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:21:07,826 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:21:07,826 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:21:07,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:21:07,827 INFO L82 PathProgramCache]: Analyzing trace with hash 539134463, now seen corresponding path program 1 times [2018-10-23 18:21:07,827 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:21:07,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:21:07,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:21:07,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:21:07,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:21:08,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:21:09,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2397 backedges. 1651 proven. 0 refuted. 0 times theorem prover too weak. 746 trivial. 0 not checked. [2018-10-23 18:21:09,462 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:21:09,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 18:21:09,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 18:21:09,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 18:21:09,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 18:21:09,464 INFO L87 Difference]: Start difference. First operand 9616 states and 10354 transitions. Second operand 5 states. [2018-10-23 18:21:12,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:21:12,447 INFO L93 Difference]: Finished difference Result 22860 states and 24589 transitions. [2018-10-23 18:21:12,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 18:21:12,447 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1161 [2018-10-23 18:21:12,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:21:12,471 INFO L225 Difference]: With dead ends: 22860 [2018-10-23 18:21:12,472 INFO L226 Difference]: Without dead ends: 13576 [2018-10-23 18:21:12,482 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 18:21:12,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13576 states. [2018-10-23 18:21:12,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13576 to 13576. [2018-10-23 18:21:12,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13576 states. [2018-10-23 18:21:12,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13576 states to 13576 states and 14429 transitions. [2018-10-23 18:21:12,641 INFO L78 Accepts]: Start accepts. Automaton has 13576 states and 14429 transitions. Word has length 1161 [2018-10-23 18:21:12,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:21:12,642 INFO L481 AbstractCegarLoop]: Abstraction has 13576 states and 14429 transitions. [2018-10-23 18:21:12,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 18:21:12,643 INFO L276 IsEmpty]: Start isEmpty. Operand 13576 states and 14429 transitions. [2018-10-23 18:21:12,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1313 [2018-10-23 18:21:12,680 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:21:12,681 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:21:12,681 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:21:12,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:21:12,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1790046530, now seen corresponding path program 1 times [2018-10-23 18:21:12,682 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:21:12,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:21:12,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:21:12,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:21:12,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:21:12,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:21:14,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3423 backedges. 1589 proven. 0 refuted. 0 times theorem prover too weak. 1834 trivial. 0 not checked. [2018-10-23 18:21:14,222 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:21:14,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:21:14,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:21:14,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:21:14,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:21:14,223 INFO L87 Difference]: Start difference. First operand 13576 states and 14429 transitions. Second operand 4 states. [2018-10-23 18:21:16,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:21:16,373 INFO L93 Difference]: Finished difference Result 29456 states and 31348 transitions. [2018-10-23 18:21:16,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:21:16,374 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1312 [2018-10-23 18:21:16,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:21:16,396 INFO L225 Difference]: With dead ends: 29456 [2018-10-23 18:21:16,396 INFO L226 Difference]: Without dead ends: 13222 [2018-10-23 18:21:16,412 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 18:21:16,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13222 states. [2018-10-23 18:21:16,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13222 to 12232. [2018-10-23 18:21:16,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12232 states. [2018-10-23 18:21:16,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12232 states to 12232 states and 12708 transitions. [2018-10-23 18:21:16,557 INFO L78 Accepts]: Start accepts. Automaton has 12232 states and 12708 transitions. Word has length 1312 [2018-10-23 18:21:16,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:21:16,558 INFO L481 AbstractCegarLoop]: Abstraction has 12232 states and 12708 transitions. [2018-10-23 18:21:16,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:21:16,559 INFO L276 IsEmpty]: Start isEmpty. Operand 12232 states and 12708 transitions. [2018-10-23 18:21:16,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1390 [2018-10-23 18:21:16,590 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:21:16,591 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:21:16,591 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:21:16,591 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:21:16,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1283964147, now seen corresponding path program 1 times [2018-10-23 18:21:16,592 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:21:16,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:21:16,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:21:16,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:21:16,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:21:16,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:21:17,622 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-23 18:21:18,031 WARN L179 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-10-23 18:21:18,430 WARN L179 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2018-10-23 18:21:21,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3665 backedges. 1783 proven. 243 refuted. 0 times theorem prover too weak. 1639 trivial. 0 not checked. [2018-10-23 18:21:21,308 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:21:21,308 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 18:21:21,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:21:21,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:21:21,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:21:23,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3665 backedges. 1783 proven. 0 refuted. 0 times theorem prover too weak. 1882 trivial. 0 not checked. [2018-10-23 18:21:23,690 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:21:23,690 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 9 [2018-10-23 18:21:23,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-23 18:21:23,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-23 18:21:23,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-10-23 18:21:23,693 INFO L87 Difference]: Start difference. First operand 12232 states and 12708 transitions. Second operand 10 states. [2018-10-23 18:21:31,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:21:31,247 INFO L93 Difference]: Finished difference Result 26448 states and 27444 transitions. [2018-10-23 18:21:31,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-23 18:21:31,247 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1389 [2018-10-23 18:21:31,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:21:31,268 INFO L225 Difference]: With dead ends: 26448 [2018-10-23 18:21:31,268 INFO L226 Difference]: Without dead ends: 14548 [2018-10-23 18:21:31,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1405 GetRequests, 1388 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2018-10-23 18:21:31,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14548 states. [2018-10-23 18:21:31,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14548 to 12562. [2018-10-23 18:21:31,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12562 states. [2018-10-23 18:21:31,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12562 states to 12562 states and 13043 transitions. [2018-10-23 18:21:31,414 INFO L78 Accepts]: Start accepts. Automaton has 12562 states and 13043 transitions. Word has length 1389 [2018-10-23 18:21:31,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:21:31,415 INFO L481 AbstractCegarLoop]: Abstraction has 12562 states and 13043 transitions. [2018-10-23 18:21:31,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-23 18:21:31,415 INFO L276 IsEmpty]: Start isEmpty. Operand 12562 states and 13043 transitions. [2018-10-23 18:21:31,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1421 [2018-10-23 18:21:31,444 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:21:31,445 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:21:31,445 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:21:31,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:21:31,446 INFO L82 PathProgramCache]: Analyzing trace with hash 37098125, now seen corresponding path program 1 times [2018-10-23 18:21:31,446 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:21:31,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:21:31,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:21:31,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:21:31,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:21:31,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:21:33,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4353 backedges. 1886 proven. 158 refuted. 0 times theorem prover too weak. 2309 trivial. 0 not checked. [2018-10-23 18:21:33,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:21:33,947 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 18:21:33,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:21:34,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:21:34,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:21:35,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4353 backedges. 2044 proven. 0 refuted. 0 times theorem prover too weak. 2309 trivial. 0 not checked. [2018-10-23 18:21:35,465 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:21:35,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2018-10-23 18:21:35,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-23 18:21:35,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-23 18:21:35,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-10-23 18:21:35,468 INFO L87 Difference]: Start difference. First operand 12562 states and 13043 transitions. Second operand 10 states. [2018-10-23 18:21:44,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:21:44,971 INFO L93 Difference]: Finished difference Result 39119 states and 40742 transitions. [2018-10-23 18:21:44,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-23 18:21:44,971 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1420 [2018-10-23 18:21:44,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:21:44,999 INFO L225 Difference]: With dead ends: 39119 [2018-10-23 18:21:44,999 INFO L226 Difference]: Without dead ends: 26281 [2018-10-23 18:21:45,011 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1450 GetRequests, 1430 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2018-10-23 18:21:45,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26281 states. [2018-10-23 18:21:45,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26281 to 20603. [2018-10-23 18:21:45,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20603 states. [2018-10-23 18:21:45,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20603 states to 20603 states and 21343 transitions. [2018-10-23 18:21:45,261 INFO L78 Accepts]: Start accepts. Automaton has 20603 states and 21343 transitions. Word has length 1420 [2018-10-23 18:21:45,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:21:45,262 INFO L481 AbstractCegarLoop]: Abstraction has 20603 states and 21343 transitions. [2018-10-23 18:21:45,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-23 18:21:45,262 INFO L276 IsEmpty]: Start isEmpty. Operand 20603 states and 21343 transitions. [2018-10-23 18:21:45,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1671 [2018-10-23 18:21:45,294 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:21:45,295 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:21:45,295 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:21:45,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:21:45,296 INFO L82 PathProgramCache]: Analyzing trace with hash 812329880, now seen corresponding path program 1 times [2018-10-23 18:21:45,296 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:21:45,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:21:45,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:21:45,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:21:45,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:21:45,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:21:46,390 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-23 18:21:46,751 WARN L179 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-10-23 18:21:46,965 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 16 [2018-10-23 18:21:51,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5084 backedges. 1556 proven. 3206 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2018-10-23 18:21:51,026 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:21:51,026 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 18:21:51,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:21:51,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:21:51,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:21:53,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5084 backedges. 3609 proven. 148 refuted. 0 times theorem prover too weak. 1327 trivial. 0 not checked. [2018-10-23 18:21:53,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 18:21:53,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 14 [2018-10-23 18:21:53,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-23 18:21:53,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-23 18:21:53,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2018-10-23 18:21:53,416 INFO L87 Difference]: Start difference. First operand 20603 states and 21343 transitions. Second operand 14 states. [2018-10-23 18:22:04,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:22:04,293 INFO L93 Difference]: Finished difference Result 42224 states and 43766 transitions. [2018-10-23 18:22:04,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-23 18:22:04,293 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 1670 [2018-10-23 18:22:04,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:22:04,315 INFO L225 Difference]: With dead ends: 42224 [2018-10-23 18:22:04,315 INFO L226 Difference]: Without dead ends: 21953 [2018-10-23 18:22:04,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1706 GetRequests, 1679 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2018-10-23 18:22:04,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21953 states. [2018-10-23 18:22:04,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21953 to 21261. [2018-10-23 18:22:04,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21261 states. [2018-10-23 18:22:04,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21261 states to 21261 states and 21840 transitions. [2018-10-23 18:22:04,549 INFO L78 Accepts]: Start accepts. Automaton has 21261 states and 21840 transitions. Word has length 1670 [2018-10-23 18:22:04,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:22:04,550 INFO L481 AbstractCegarLoop]: Abstraction has 21261 states and 21840 transitions. [2018-10-23 18:22:04,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-23 18:22:04,551 INFO L276 IsEmpty]: Start isEmpty. Operand 21261 states and 21840 transitions. [2018-10-23 18:22:04,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1933 [2018-10-23 18:22:04,583 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:22:04,584 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 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, 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] [2018-10-23 18:22:04,584 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:22:04,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:22:04,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1826266732, now seen corresponding path program 1 times [2018-10-23 18:22:04,585 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:22:04,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:22:04,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:22:04,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:22:04,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:22:04,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:22:06,152 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-23 18:22:06,316 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-23 18:22:10,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6719 backedges. 3267 proven. 251 refuted. 0 times theorem prover too weak. 3201 trivial. 0 not checked. [2018-10-23 18:22:10,477 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:22:10,477 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 18:22:10,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:22:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:22:10,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:22:13,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6719 backedges. 3868 proven. 0 refuted. 0 times theorem prover too weak. 2851 trivial. 0 not checked. [2018-10-23 18:22:13,626 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:22:13,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2018-10-23 18:22:13,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-23 18:22:13,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-23 18:22:13,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-10-23 18:22:13,629 INFO L87 Difference]: Start difference. First operand 21261 states and 21840 transitions. Second operand 11 states. [2018-10-23 18:22:25,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:22:25,070 INFO L93 Difference]: Finished difference Result 45315 states and 46608 transitions. [2018-10-23 18:22:25,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-23 18:22:25,070 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 1932 [2018-10-23 18:22:25,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:22:25,089 INFO L225 Difference]: With dead ends: 45315 [2018-10-23 18:22:25,089 INFO L226 Difference]: Without dead ends: 24386 [2018-10-23 18:22:25,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1961 GetRequests, 1939 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2018-10-23 18:22:25,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24386 states. [2018-10-23 18:22:25,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24386 to 22420. [2018-10-23 18:22:25,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22420 states. [2018-10-23 18:22:25,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22420 states to 22420 states and 22943 transitions. [2018-10-23 18:22:25,311 INFO L78 Accepts]: Start accepts. Automaton has 22420 states and 22943 transitions. Word has length 1932 [2018-10-23 18:22:25,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:22:25,312 INFO L481 AbstractCegarLoop]: Abstraction has 22420 states and 22943 transitions. [2018-10-23 18:22:25,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-23 18:22:25,312 INFO L276 IsEmpty]: Start isEmpty. Operand 22420 states and 22943 transitions. [2018-10-23 18:22:25,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2246 [2018-10-23 18:22:25,348 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:22:25,349 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2018-10-23 18:22:25,349 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:22:25,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:22:25,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1274453784, now seen corresponding path program 1 times [2018-10-23 18:22:25,350 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:22:25,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:22:25,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:22:25,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:22:25,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:22:25,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:22:26,574 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-23 18:22:26,753 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-23 18:22:31,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9742 backedges. 4289 proven. 319 refuted. 0 times theorem prover too weak. 5134 trivial. 0 not checked. [2018-10-23 18:22:31,787 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:22:31,787 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 18:22:31,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:22:32,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:22:32,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:22:34,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9742 backedges. 5414 proven. 0 refuted. 0 times theorem prover too weak. 4328 trivial. 0 not checked. [2018-10-23 18:22:34,342 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:22:34,343 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2018-10-23 18:22:34,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-23 18:22:34,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-23 18:22:34,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-10-23 18:22:34,345 INFO L87 Difference]: Start difference. First operand 22420 states and 22943 transitions. Second operand 8 states. [2018-10-23 18:22:38,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:22:38,972 INFO L93 Difference]: Finished difference Result 45538 states and 46591 transitions. [2018-10-23 18:22:38,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-23 18:22:38,973 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 2245 [2018-10-23 18:22:38,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:22:38,992 INFO L225 Difference]: With dead ends: 45538 [2018-10-23 18:22:38,993 INFO L226 Difference]: Without dead ends: 23450 [2018-10-23 18:22:39,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2256 GetRequests, 2247 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-10-23 18:22:39,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23450 states. [2018-10-23 18:22:39,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23450 to 22750. [2018-10-23 18:22:39,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22750 states. [2018-10-23 18:22:39,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22750 states to 22750 states and 23270 transitions. [2018-10-23 18:22:39,206 INFO L78 Accepts]: Start accepts. Automaton has 22750 states and 23270 transitions. Word has length 2245 [2018-10-23 18:22:39,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:22:39,207 INFO L481 AbstractCegarLoop]: Abstraction has 22750 states and 23270 transitions. [2018-10-23 18:22:39,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-23 18:22:39,207 INFO L276 IsEmpty]: Start isEmpty. Operand 22750 states and 23270 transitions. [2018-10-23 18:22:39,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2461 [2018-10-23 18:22:39,253 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:22:39,254 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:22:39,255 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:22:39,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:22:39,256 INFO L82 PathProgramCache]: Analyzing trace with hash 660163135, now seen corresponding path program 1 times [2018-10-23 18:22:39,256 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:22:39,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:22:39,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:22:39,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:22:39,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:22:39,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:22:41,525 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-23 18:22:45,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11160 backedges. 5477 proven. 572 refuted. 0 times theorem prover too weak. 5111 trivial. 0 not checked. [2018-10-23 18:22:45,722 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:22:45,722 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 18:22:45,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:22:46,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:22:46,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:22:50,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11160 backedges. 5582 proven. 467 refuted. 0 times theorem prover too weak. 5111 trivial. 0 not checked. [2018-10-23 18:22:50,049 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 18:22:50,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2018-10-23 18:22:50,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 18:22:50,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 18:22:50,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-23 18:22:50,054 INFO L87 Difference]: Start difference. First operand 22750 states and 23270 transitions. Second operand 9 states. [2018-10-23 18:22:55,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:22:55,565 INFO L93 Difference]: Finished difference Result 48389 states and 49540 transitions. [2018-10-23 18:22:55,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-23 18:22:55,566 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 2460 [2018-10-23 18:22:55,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:22:55,585 INFO L225 Difference]: With dead ends: 48389 [2018-10-23 18:22:55,586 INFO L226 Difference]: Without dead ends: 25971 [2018-10-23 18:22:55,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2473 GetRequests, 2460 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-10-23 18:22:55,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25971 states. [2018-10-23 18:22:55,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25971 to 25028. [2018-10-23 18:22:55,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25028 states. [2018-10-23 18:22:55,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25028 states to 25028 states and 25565 transitions. [2018-10-23 18:22:55,814 INFO L78 Accepts]: Start accepts. Automaton has 25028 states and 25565 transitions. Word has length 2460 [2018-10-23 18:22:55,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:22:55,814 INFO L481 AbstractCegarLoop]: Abstraction has 25028 states and 25565 transitions. [2018-10-23 18:22:55,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-23 18:22:55,814 INFO L276 IsEmpty]: Start isEmpty. Operand 25028 states and 25565 transitions. [2018-10-23 18:22:55,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2469 [2018-10-23 18:22:55,866 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:22:55,867 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:22:55,867 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:22:55,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:22:55,868 INFO L82 PathProgramCache]: Analyzing trace with hash 405645893, now seen corresponding path program 1 times [2018-10-23 18:22:55,868 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:22:55,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:22:55,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:22:55,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:22:55,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:22:55,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:22:58,464 INFO L134 CoverageAnalysis]: Checked inductivity of 11695 backedges. 6106 proven. 0 refuted. 0 times theorem prover too weak. 5589 trivial. 0 not checked. [2018-10-23 18:22:58,465 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:22:58,465 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:22:58,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:22:58,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:22:58,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:22:58,466 INFO L87 Difference]: Start difference. First operand 25028 states and 25565 transitions. Second operand 4 states. [2018-10-23 18:23:00,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:23:00,629 INFO L93 Difference]: Finished difference Result 49724 states and 50796 transitions. [2018-10-23 18:23:00,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:23:00,629 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 2468 [2018-10-23 18:23:00,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:23:00,649 INFO L225 Difference]: With dead ends: 49724 [2018-10-23 18:23:00,649 INFO L226 Difference]: Without dead ends: 25028 [2018-10-23 18:23:00,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:23:00,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25028 states. [2018-10-23 18:23:00,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25028 to 23993. [2018-10-23 18:23:00,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23993 states. [2018-10-23 18:23:00,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23993 states to 23993 states and 24443 transitions. [2018-10-23 18:23:00,867 INFO L78 Accepts]: Start accepts. Automaton has 23993 states and 24443 transitions. Word has length 2468 [2018-10-23 18:23:00,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:23:00,868 INFO L481 AbstractCegarLoop]: Abstraction has 23993 states and 24443 transitions. [2018-10-23 18:23:00,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:23:00,868 INFO L276 IsEmpty]: Start isEmpty. Operand 23993 states and 24443 transitions. [2018-10-23 18:23:00,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2483 [2018-10-23 18:23:00,906 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:23:00,907 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:23:00,907 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:23:00,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:23:00,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1125891096, now seen corresponding path program 1 times [2018-10-23 18:23:00,908 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:23:00,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:23:00,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:23:00,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:23:00,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:23:01,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:23:08,705 INFO L134 CoverageAnalysis]: Checked inductivity of 11320 backedges. 8088 proven. 985 refuted. 0 times theorem prover too weak. 2247 trivial. 0 not checked. [2018-10-23 18:23:08,705 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:23:08,705 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 18:23:08,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:23:09,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:23:09,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:23:15,846 WARN L179 SmtUtils]: Spent 6.31 s on a formula simplification. DAG size of input: 427 DAG size of output: 22 [2018-10-23 18:23:21,304 INFO L134 CoverageAnalysis]: Checked inductivity of 11320 backedges. 7313 proven. 0 refuted. 0 times theorem prover too weak. 4007 trivial. 0 not checked. [2018-10-23 18:23:21,325 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:23:21,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2018-10-23 18:23:21,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-23 18:23:21,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-23 18:23:21,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2018-10-23 18:23:21,329 INFO L87 Difference]: Start difference. First operand 23993 states and 24443 transitions. Second operand 10 states. [2018-10-23 18:23:38,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:23:38,870 INFO L93 Difference]: Finished difference Result 52104 states and 53057 transitions. [2018-10-23 18:23:38,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-23 18:23:38,870 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 2482 [2018-10-23 18:23:38,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:23:38,893 INFO L225 Difference]: With dead ends: 52104 [2018-10-23 18:23:38,893 INFO L226 Difference]: Without dead ends: 28443 [2018-10-23 18:23:38,905 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2513 GetRequests, 2490 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2018-10-23 18:23:38,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28443 states. [2018-10-23 18:23:39,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28443 to 22573. [2018-10-23 18:23:39,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22573 states. [2018-10-23 18:23:39,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22573 states to 22573 states and 22971 transitions. [2018-10-23 18:23:39,153 INFO L78 Accepts]: Start accepts. Automaton has 22573 states and 22971 transitions. Word has length 2482 [2018-10-23 18:23:39,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:23:39,154 INFO L481 AbstractCegarLoop]: Abstraction has 22573 states and 22971 transitions. [2018-10-23 18:23:39,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-23 18:23:39,154 INFO L276 IsEmpty]: Start isEmpty. Operand 22573 states and 22971 transitions. [2018-10-23 18:23:39,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2704 [2018-10-23 18:23:39,199 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:23:39,200 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:23:39,201 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:23:39,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:23:39,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1854556499, now seen corresponding path program 1 times [2018-10-23 18:23:39,201 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:23:39,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:23:39,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:23:39,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:23:39,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:23:39,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:23:49,632 INFO L134 CoverageAnalysis]: Checked inductivity of 13567 backedges. 9887 proven. 1277 refuted. 0 times theorem prover too weak. 2403 trivial. 0 not checked. [2018-10-23 18:23:49,632 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:23:49,632 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 18:23:49,640 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:23:50,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:23:50,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown