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/Problem11_label11_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 16:03:34,425 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 16:03:34,427 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 16:03:34,444 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 16:03:34,445 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 16:03:34,446 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 16:03:34,447 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 16:03:34,450 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 16:03:34,452 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 16:03:34,453 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 16:03:34,454 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 16:03:34,454 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 16:03:34,455 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 16:03:34,456 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 16:03:34,457 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 16:03:34,458 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 16:03:34,462 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 16:03:34,464 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 16:03:34,466 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 16:03:34,468 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 16:03:34,469 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 16:03:34,470 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 16:03:34,472 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 16:03:34,473 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 16:03:34,473 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 16:03:34,474 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 16:03:34,475 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 16:03:34,476 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 16:03:34,476 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 16:03:34,477 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 16:03:34,478 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 16:03:34,478 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-24 16:03:34,481 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-24 16:03:34,498 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 16:03:34,499 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 16:03:34,500 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 16:03:34,500 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 16:03:34,500 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 16:03:34,501 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 16:03:34,501 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 16:03:34,501 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 16:03:34,501 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 16:03:34,502 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 16:03:34,502 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 16:03:34,502 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 16:03:34,502 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 16:03:34,502 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 16:03:34,502 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 16:03:34,503 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 16:03:34,503 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 16:03:34,503 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 16:03:34,503 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 16:03:34,504 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 16:03:34,504 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 16:03:34,504 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 16:03:34,504 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 16:03:34,504 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 16:03:34,505 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 16:03:34,505 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 16:03:34,505 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 16:03:34,505 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 16:03:34,570 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 16:03:34,586 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 16:03:34,592 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 16:03:34,593 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 16:03:34,594 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 16:03:34,595 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label11_true-unreach-call.c [2018-10-24 16:03:34,662 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/af43d43cd/a85aa7026fbf408ab4b3c6b80af1ab0c/FLAG6e4798c14 [2018-10-24 16:03:35,285 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 16:03:35,288 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label11_true-unreach-call.c [2018-10-24 16:03:35,317 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/af43d43cd/a85aa7026fbf408ab4b3c6b80af1ab0c/FLAG6e4798c14 [2018-10-24 16:03:35,338 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/af43d43cd/a85aa7026fbf408ab4b3c6b80af1ab0c [2018-10-24 16:03:35,349 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 16:03:35,352 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 16:03:35,353 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 16:03:35,354 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 16:03:35,359 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 16:03:35,361 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:03:35" (1/1) ... [2018-10-24 16:03:35,364 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11290b0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:35, skipping insertion in model container [2018-10-24 16:03:35,364 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:03:35" (1/1) ... [2018-10-24 16:03:35,374 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 16:03:35,454 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 16:03:36,204 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:03:36,211 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 16:03:36,401 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:03:36,418 INFO L193 MainTranslator]: Completed translation [2018-10-24 16:03:36,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:36 WrapperNode [2018-10-24 16:03:36,419 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 16:03:36,420 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 16:03:36,420 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 16:03:36,421 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 16:03:36,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:36" (1/1) ... [2018-10-24 16:03:36,474 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:36" (1/1) ... [2018-10-24 16:03:36,714 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 16:03:36,715 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 16:03:36,715 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 16:03:36,715 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 16:03:36,726 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:36" (1/1) ... [2018-10-24 16:03:36,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:36" (1/1) ... [2018-10-24 16:03:36,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:36" (1/1) ... [2018-10-24 16:03:36,736 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:36" (1/1) ... [2018-10-24 16:03:36,799 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:36" (1/1) ... [2018-10-24 16:03:36,813 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:36" (1/1) ... [2018-10-24 16:03:36,827 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:36" (1/1) ... [2018-10-24 16:03:36,843 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 16:03:36,844 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 16:03:36,844 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 16:03:36,844 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 16:03:36,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 16:03:36,919 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 16:03:36,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 16:03:36,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 16:03:41,344 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 16:03:41,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:03:41 BoogieIcfgContainer [2018-10-24 16:03:41,345 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 16:03:41,346 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 16:03:41,346 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 16:03:41,349 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 16:03:41,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 04:03:35" (1/3) ... [2018-10-24 16:03:41,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60428dbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:03:41, skipping insertion in model container [2018-10-24 16:03:41,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:36" (2/3) ... [2018-10-24 16:03:41,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60428dbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:03:41, skipping insertion in model container [2018-10-24 16:03:41,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:03:41" (3/3) ... [2018-10-24 16:03:41,353 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label11_true-unreach-call.c [2018-10-24 16:03:41,363 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 16:03:41,372 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 16:03:41,390 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 16:03:41,427 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 16:03:41,428 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 16:03:41,428 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 16:03:41,428 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 16:03:41,428 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 16:03:41,429 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 16:03:41,429 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 16:03:41,429 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 16:03:41,429 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 16:03:41,454 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states. [2018-10-24 16:03:41,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-24 16:03:41,465 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:03:41,466 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:03:41,469 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:03:41,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:03:41,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1515441142, now seen corresponding path program 1 times [2018-10-24 16:03:41,478 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:03:41,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:03:41,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:03:41,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:03:41,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:03:41,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:03:42,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:03:42,021 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:03:42,022 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:03:42,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:03:42,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:03:42,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:03:42,047 INFO L87 Difference]: Start difference. First operand 284 states. Second operand 4 states. [2018-10-24 16:03:45,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:03:45,151 INFO L93 Difference]: Finished difference Result 961 states and 1728 transitions. [2018-10-24 16:03:45,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:03:45,153 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2018-10-24 16:03:45,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:03:45,180 INFO L225 Difference]: With dead ends: 961 [2018-10-24 16:03:45,181 INFO L226 Difference]: Without dead ends: 670 [2018-10-24 16:03:45,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:03:45,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2018-10-24 16:03:45,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 670. [2018-10-24 16:03:45,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 670 states. [2018-10-24 16:03:45,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1024 transitions. [2018-10-24 16:03:45,274 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1024 transitions. Word has length 62 [2018-10-24 16:03:45,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:03:45,275 INFO L481 AbstractCegarLoop]: Abstraction has 670 states and 1024 transitions. [2018-10-24 16:03:45,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:03:45,275 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1024 transitions. [2018-10-24 16:03:45,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-24 16:03:45,282 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:03:45,282 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:03:45,282 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:03:45,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:03:45,283 INFO L82 PathProgramCache]: Analyzing trace with hash 439607983, now seen corresponding path program 1 times [2018-10-24 16:03:45,283 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:03:45,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:03:45,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:03:45,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:03:45,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:03:45,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:03:45,591 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:03:45,592 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:03:45,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:03:45,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:03:45,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:03:45,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:03:45,596 INFO L87 Difference]: Start difference. First operand 670 states and 1024 transitions. Second operand 4 states. [2018-10-24 16:03:50,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:03:50,900 INFO L93 Difference]: Finished difference Result 2478 states and 3869 transitions. [2018-10-24 16:03:50,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:03:50,902 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2018-10-24 16:03:50,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:03:50,913 INFO L225 Difference]: With dead ends: 2478 [2018-10-24 16:03:50,913 INFO L226 Difference]: Without dead ends: 1810 [2018-10-24 16:03:50,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:03:50,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2018-10-24 16:03:50,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 1226. [2018-10-24 16:03:50,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1226 states. [2018-10-24 16:03:50,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1709 transitions. [2018-10-24 16:03:50,999 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1709 transitions. Word has length 139 [2018-10-24 16:03:51,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:03:51,000 INFO L481 AbstractCegarLoop]: Abstraction has 1226 states and 1709 transitions. [2018-10-24 16:03:51,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:03:51,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1709 transitions. [2018-10-24 16:03:51,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-24 16:03:51,008 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:03:51,008 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:03:51,008 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:03:51,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:03:51,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1794831649, now seen corresponding path program 1 times [2018-10-24 16:03:51,009 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:03:51,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:03:51,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:03:51,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:03:51,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:03:51,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:03:51,380 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 4 [2018-10-24 16:03:51,408 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:03:51,408 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:03:51,408 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:03:51,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:03:51,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:03:51,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:03:51,410 INFO L87 Difference]: Start difference. First operand 1226 states and 1709 transitions. Second operand 4 states. [2018-10-24 16:03:53,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:03:53,823 INFO L93 Difference]: Finished difference Result 4138 states and 5963 transitions. [2018-10-24 16:03:53,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:03:53,823 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 190 [2018-10-24 16:03:53,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:03:53,839 INFO L225 Difference]: With dead ends: 4138 [2018-10-24 16:03:53,840 INFO L226 Difference]: Without dead ends: 2914 [2018-10-24 16:03:53,842 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:03:53,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2914 states. [2018-10-24 16:03:53,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2914 to 2151. [2018-10-24 16:03:53,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2151 states. [2018-10-24 16:03:53,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2151 states to 2151 states and 2800 transitions. [2018-10-24 16:03:53,894 INFO L78 Accepts]: Start accepts. Automaton has 2151 states and 2800 transitions. Word has length 190 [2018-10-24 16:03:53,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:03:53,895 INFO L481 AbstractCegarLoop]: Abstraction has 2151 states and 2800 transitions. [2018-10-24 16:03:53,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:03:53,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2151 states and 2800 transitions. [2018-10-24 16:03:53,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-10-24 16:03:53,901 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:03:53,901 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:03:53,904 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:03:53,904 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:03:53,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1441746538, now seen corresponding path program 1 times [2018-10-24 16:03:53,905 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:03:53,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:03:53,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:03:53,906 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:03:53,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:03:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:03:54,189 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-10-24 16:03:54,190 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:03:54,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:03:54,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:03:54,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:03:54,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:03:54,191 INFO L87 Difference]: Start difference. First operand 2151 states and 2800 transitions. Second operand 4 states. [2018-10-24 16:04:00,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:04:00,300 INFO L93 Difference]: Finished difference Result 7462 states and 9948 transitions. [2018-10-24 16:04:00,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:04:00,300 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 208 [2018-10-24 16:04:00,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:04:00,325 INFO L225 Difference]: With dead ends: 7462 [2018-10-24 16:04:00,325 INFO L226 Difference]: Without dead ends: 5313 [2018-10-24 16:04:00,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:04:00,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5313 states. [2018-10-24 16:04:00,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5313 to 5111. [2018-10-24 16:04:00,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5111 states. [2018-10-24 16:04:00,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5111 states to 5111 states and 6491 transitions. [2018-10-24 16:04:00,423 INFO L78 Accepts]: Start accepts. Automaton has 5111 states and 6491 transitions. Word has length 208 [2018-10-24 16:04:00,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:04:00,424 INFO L481 AbstractCegarLoop]: Abstraction has 5111 states and 6491 transitions. [2018-10-24 16:04:00,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:04:00,424 INFO L276 IsEmpty]: Start isEmpty. Operand 5111 states and 6491 transitions. [2018-10-24 16:04:00,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-10-24 16:04:00,429 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:04:00,430 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:04:00,430 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:04:00,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:04:00,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1315185902, now seen corresponding path program 1 times [2018-10-24 16:04:00,432 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:04:00,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:04:00,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:00,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:04:00,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:00,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:04:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-10-24 16:04:00,684 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:04:00,684 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:04:00,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:04:00,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:04:00,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:04:00,685 INFO L87 Difference]: Start difference. First operand 5111 states and 6491 transitions. Second operand 3 states. [2018-10-24 16:04:03,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:04:03,090 INFO L93 Difference]: Finished difference Result 11883 states and 15322 transitions. [2018-10-24 16:04:03,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:04:03,090 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 252 [2018-10-24 16:04:03,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:04:03,120 INFO L225 Difference]: With dead ends: 11883 [2018-10-24 16:04:03,120 INFO L226 Difference]: Without dead ends: 6959 [2018-10-24 16:04:03,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:04:03,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6959 states. [2018-10-24 16:04:03,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6959 to 6959. [2018-10-24 16:04:03,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6959 states. [2018-10-24 16:04:03,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6959 states to 6959 states and 8768 transitions. [2018-10-24 16:04:03,242 INFO L78 Accepts]: Start accepts. Automaton has 6959 states and 8768 transitions. Word has length 252 [2018-10-24 16:04:03,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:04:03,243 INFO L481 AbstractCegarLoop]: Abstraction has 6959 states and 8768 transitions. [2018-10-24 16:04:03,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:04:03,243 INFO L276 IsEmpty]: Start isEmpty. Operand 6959 states and 8768 transitions. [2018-10-24 16:04:03,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-10-24 16:04:03,252 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:04:03,253 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:04:03,253 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:04:03,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:04:03,253 INFO L82 PathProgramCache]: Analyzing trace with hash 484844517, now seen corresponding path program 1 times [2018-10-24 16:04:03,254 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:04:03,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:04:03,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:03,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:04:03,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:03,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:04:03,739 WARN L179 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2018-10-24 16:04:03,784 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:04:03,784 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:04:03,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:04:03,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:04:03,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:04:03,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:04:03,785 INFO L87 Difference]: Start difference. First operand 6959 states and 8768 transitions. Second operand 4 states. [2018-10-24 16:04:06,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:04:06,741 INFO L93 Difference]: Finished difference Result 18185 states and 23270 transitions. [2018-10-24 16:04:06,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:04:06,742 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 268 [2018-10-24 16:04:06,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:04:06,788 INFO L225 Difference]: With dead ends: 18185 [2018-10-24 16:04:06,788 INFO L226 Difference]: Without dead ends: 11413 [2018-10-24 16:04:06,800 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:04:06,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11413 states. [2018-10-24 16:04:06,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11413 to 11029. [2018-10-24 16:04:06,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11029 states. [2018-10-24 16:04:06,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11029 states to 11029 states and 13573 transitions. [2018-10-24 16:04:06,999 INFO L78 Accepts]: Start accepts. Automaton has 11029 states and 13573 transitions. Word has length 268 [2018-10-24 16:04:06,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:04:06,999 INFO L481 AbstractCegarLoop]: Abstraction has 11029 states and 13573 transitions. [2018-10-24 16:04:06,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:04:07,000 INFO L276 IsEmpty]: Start isEmpty. Operand 11029 states and 13573 transitions. [2018-10-24 16:04:07,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2018-10-24 16:04:07,018 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:04:07,018 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-10-24 16:04:07,019 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:04:07,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:04:07,019 INFO L82 PathProgramCache]: Analyzing trace with hash 955286133, now seen corresponding path program 1 times [2018-10-24 16:04:07,019 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:04:07,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:04:07,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:07,021 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:04:07,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:07,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:04:07,459 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 334 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-10-24 16:04:07,459 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:04:07,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:04:07,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:04:07,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:04:07,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:04:07,461 INFO L87 Difference]: Start difference. First operand 11029 states and 13573 transitions. Second operand 3 states. [2018-10-24 16:04:09,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:04:09,917 INFO L93 Difference]: Finished difference Result 21499 states and 26551 transitions. [2018-10-24 16:04:09,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:04:09,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 344 [2018-10-24 16:04:09,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:04:09,938 INFO L225 Difference]: With dead ends: 21499 [2018-10-24 16:04:09,939 INFO L226 Difference]: Without dead ends: 10657 [2018-10-24 16:04:09,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:04:09,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10657 states. [2018-10-24 16:04:10,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10657 to 10656. [2018-10-24 16:04:10,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10656 states. [2018-10-24 16:04:10,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10656 states to 10656 states and 12526 transitions. [2018-10-24 16:04:10,075 INFO L78 Accepts]: Start accepts. Automaton has 10656 states and 12526 transitions. Word has length 344 [2018-10-24 16:04:10,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:04:10,076 INFO L481 AbstractCegarLoop]: Abstraction has 10656 states and 12526 transitions. [2018-10-24 16:04:10,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:04:10,076 INFO L276 IsEmpty]: Start isEmpty. Operand 10656 states and 12526 transitions. [2018-10-24 16:04:10,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2018-10-24 16:04:10,092 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:04:10,092 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:04:10,093 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:04:10,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:04:10,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1928196445, now seen corresponding path program 1 times [2018-10-24 16:04:10,093 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:04:10,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:04:10,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:10,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:04:10,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:10,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:04:10,378 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2018-10-24 16:04:10,379 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:04:10,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:04:10,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:04:10,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:04:10,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:04:10,380 INFO L87 Difference]: Start difference. First operand 10656 states and 12526 transitions. Second operand 3 states. [2018-10-24 16:04:12,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:04:12,221 INFO L93 Difference]: Finished difference Result 23532 states and 27910 transitions. [2018-10-24 16:04:12,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:04:12,221 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 347 [2018-10-24 16:04:12,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:04:12,245 INFO L225 Difference]: With dead ends: 23532 [2018-10-24 16:04:12,245 INFO L226 Difference]: Without dead ends: 13063 [2018-10-24 16:04:12,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:04:12,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13063 states. [2018-10-24 16:04:12,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13063 to 12690. [2018-10-24 16:04:12,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12690 states. [2018-10-24 16:04:12,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12690 states to 12690 states and 14657 transitions. [2018-10-24 16:04:12,398 INFO L78 Accepts]: Start accepts. Automaton has 12690 states and 14657 transitions. Word has length 347 [2018-10-24 16:04:12,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:04:12,399 INFO L481 AbstractCegarLoop]: Abstraction has 12690 states and 14657 transitions. [2018-10-24 16:04:12,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:04:12,399 INFO L276 IsEmpty]: Start isEmpty. Operand 12690 states and 14657 transitions. [2018-10-24 16:04:12,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2018-10-24 16:04:12,421 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:04:12,422 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-10-24 16:04:12,422 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:04:12,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:04:12,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1873371516, now seen corresponding path program 1 times [2018-10-24 16:04:12,422 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:04:12,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:04:12,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:12,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:04:12,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:12,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:04:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 386 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-10-24 16:04:12,825 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:04:12,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:04:12,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:04:12,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:04:12,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:04:12,827 INFO L87 Difference]: Start difference. First operand 12690 states and 14657 transitions. Second operand 3 states. [2018-10-24 16:04:14,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:04:14,189 INFO L93 Difference]: Finished difference Result 27782 states and 32238 transitions. [2018-10-24 16:04:14,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:04:14,190 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 400 [2018-10-24 16:04:14,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:04:14,215 INFO L225 Difference]: With dead ends: 27782 [2018-10-24 16:04:14,216 INFO L226 Difference]: Without dead ends: 14535 [2018-10-24 16:04:14,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:04:14,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14535 states. [2018-10-24 16:04:14,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14535 to 13795. [2018-10-24 16:04:14,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13795 states. [2018-10-24 16:04:14,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13795 states to 13795 states and 15682 transitions. [2018-10-24 16:04:14,386 INFO L78 Accepts]: Start accepts. Automaton has 13795 states and 15682 transitions. Word has length 400 [2018-10-24 16:04:14,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:04:14,386 INFO L481 AbstractCegarLoop]: Abstraction has 13795 states and 15682 transitions. [2018-10-24 16:04:14,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:04:14,387 INFO L276 IsEmpty]: Start isEmpty. Operand 13795 states and 15682 transitions. [2018-10-24 16:04:14,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2018-10-24 16:04:14,409 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:04:14,410 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-10-24 16:04:14,410 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:04:14,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:04:14,410 INFO L82 PathProgramCache]: Analyzing trace with hash 838140476, now seen corresponding path program 1 times [2018-10-24 16:04:14,410 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:04:14,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:04:14,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:14,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:04:14,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:14,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:04:14,822 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 331 proven. 103 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-10-24 16:04:14,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:04:14,822 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:04:14,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:04:14,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:04:15,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:04:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 331 proven. 103 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-10-24 16:04:15,364 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:04:15,364 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2018-10-24 16:04:15,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:04:15,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:04:15,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:04:15,366 INFO L87 Difference]: Start difference. First operand 13795 states and 15682 transitions. Second operand 5 states. [2018-10-24 16:04:20,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:04:20,659 INFO L93 Difference]: Finished difference Result 33722 states and 38667 transitions. [2018-10-24 16:04:20,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 16:04:20,660 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 405 [2018-10-24 16:04:20,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:04:20,696 INFO L225 Difference]: With dead ends: 33722 [2018-10-24 16:04:20,697 INFO L226 Difference]: Without dead ends: 20114 [2018-10-24 16:04:20,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 404 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:04:20,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20114 states. [2018-10-24 16:04:20,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20114 to 14159. [2018-10-24 16:04:20,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14159 states. [2018-10-24 16:04:20,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14159 states to 14159 states and 16088 transitions. [2018-10-24 16:04:20,957 INFO L78 Accepts]: Start accepts. Automaton has 14159 states and 16088 transitions. Word has length 405 [2018-10-24 16:04:20,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:04:20,957 INFO L481 AbstractCegarLoop]: Abstraction has 14159 states and 16088 transitions. [2018-10-24 16:04:20,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:04:20,957 INFO L276 IsEmpty]: Start isEmpty. Operand 14159 states and 16088 transitions. [2018-10-24 16:04:20,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2018-10-24 16:04:20,977 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:04:20,977 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:04:20,978 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:04:20,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:04:20,978 INFO L82 PathProgramCache]: Analyzing trace with hash 494281356, now seen corresponding path program 1 times [2018-10-24 16:04:20,978 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:04:20,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:04:20,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:20,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:04:20,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:04:21,691 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 396 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-10-24 16:04:21,691 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:04:21,692 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:04:21,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:04:21,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:04:21,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:04:21,693 INFO L87 Difference]: Start difference. First operand 14159 states and 16088 transitions. Second operand 5 states. [2018-10-24 16:04:25,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:04:25,290 INFO L93 Difference]: Finished difference Result 35358 states and 40264 transitions. [2018-10-24 16:04:25,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:04:25,291 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 414 [2018-10-24 16:04:25,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:04:25,317 INFO L225 Difference]: With dead ends: 35358 [2018-10-24 16:04:25,317 INFO L226 Difference]: Without dead ends: 20646 [2018-10-24 16:04:25,330 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:04:25,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20646 states. [2018-10-24 16:04:25,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20646 to 19166. [2018-10-24 16:04:25,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19166 states. [2018-10-24 16:04:25,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19166 states to 19166 states and 21810 transitions. [2018-10-24 16:04:25,694 INFO L78 Accepts]: Start accepts. Automaton has 19166 states and 21810 transitions. Word has length 414 [2018-10-24 16:04:25,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:04:25,695 INFO L481 AbstractCegarLoop]: Abstraction has 19166 states and 21810 transitions. [2018-10-24 16:04:25,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:04:25,695 INFO L276 IsEmpty]: Start isEmpty. Operand 19166 states and 21810 transitions. [2018-10-24 16:04:25,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2018-10-24 16:04:25,718 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:04:25,719 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:04:25,719 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:04:25,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:04:25,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1286239209, now seen corresponding path program 1 times [2018-10-24 16:04:25,720 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:04:25,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:04:25,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:25,721 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:04:25,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:25,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:04:26,112 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 274 proven. 0 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2018-10-24 16:04:26,113 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:04:26,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 16:04:26,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:04:26,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:04:26,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:04:26,114 INFO L87 Difference]: Start difference. First operand 19166 states and 21810 transitions. Second operand 3 states. [2018-10-24 16:04:27,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:04:27,062 INFO L93 Difference]: Finished difference Result 35175 states and 40002 transitions. [2018-10-24 16:04:27,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:04:27,063 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 440 [2018-10-24 16:04:27,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:04:27,078 INFO L225 Difference]: With dead ends: 35175 [2018-10-24 16:04:27,078 INFO L226 Difference]: Without dead ends: 18421 [2018-10-24 16:04:27,088 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:04:27,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18421 states. [2018-10-24 16:04:27,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18421 to 18421. [2018-10-24 16:04:27,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18421 states. [2018-10-24 16:04:27,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18421 states to 18421 states and 20880 transitions. [2018-10-24 16:04:27,288 INFO L78 Accepts]: Start accepts. Automaton has 18421 states and 20880 transitions. Word has length 440 [2018-10-24 16:04:27,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:04:27,289 INFO L481 AbstractCegarLoop]: Abstraction has 18421 states and 20880 transitions. [2018-10-24 16:04:27,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:04:27,289 INFO L276 IsEmpty]: Start isEmpty. Operand 18421 states and 20880 transitions. [2018-10-24 16:04:27,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2018-10-24 16:04:27,306 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:04:27,307 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:04:27,307 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:04:27,307 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:04:27,307 INFO L82 PathProgramCache]: Analyzing trace with hash 2047885097, now seen corresponding path program 1 times [2018-10-24 16:04:27,308 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:04:27,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:04:27,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:27,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:04:27,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:27,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:04:27,765 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-10-24 16:04:27,875 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 673 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2018-10-24 16:04:27,876 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:04:27,876 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:04:27,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:04:27,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:04:27,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:04:27,877 INFO L87 Difference]: Start difference. First operand 18421 states and 20880 transitions. Second operand 4 states. [2018-10-24 16:04:29,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:04:29,659 INFO L93 Difference]: Finished difference Result 37225 states and 42209 transitions. [2018-10-24 16:04:29,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:04:29,660 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 505 [2018-10-24 16:04:29,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:04:29,684 INFO L225 Difference]: With dead ends: 37225 [2018-10-24 16:04:29,684 INFO L226 Difference]: Without dead ends: 18991 [2018-10-24 16:04:29,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:04:29,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18991 states. [2018-10-24 16:04:29,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18991 to 18419. [2018-10-24 16:04:29,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18419 states. [2018-10-24 16:04:30,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18419 states to 18419 states and 20442 transitions. [2018-10-24 16:04:30,262 INFO L78 Accepts]: Start accepts. Automaton has 18419 states and 20442 transitions. Word has length 505 [2018-10-24 16:04:30,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:04:30,263 INFO L481 AbstractCegarLoop]: Abstraction has 18419 states and 20442 transitions. [2018-10-24 16:04:30,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:04:30,263 INFO L276 IsEmpty]: Start isEmpty. Operand 18419 states and 20442 transitions. [2018-10-24 16:04:30,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 577 [2018-10-24 16:04:30,282 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:04:30,283 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2018-10-24 16:04:30,283 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:04:30,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:04:30,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1718702583, now seen corresponding path program 1 times [2018-10-24 16:04:30,285 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:04:30,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:04:30,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:30,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:04:30,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:30,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:04:30,932 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-10-24 16:04:31,583 WARN L179 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 18 [2018-10-24 16:04:32,344 WARN L179 SmtUtils]: Spent 708.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2018-10-24 16:04:33,099 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 454 proven. 111 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2018-10-24 16:04:33,099 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:04:33,099 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 [2018-10-24 16:04:33,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:04:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:04:33,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:04:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 348 proven. 457 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-10-24 16:04:34,643 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:04:34,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2018-10-24 16:04:34,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 16:04:34,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 16:04:34,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-10-24 16:04:34,646 INFO L87 Difference]: Start difference. First operand 18419 states and 20442 transitions. Second operand 9 states. [2018-10-24 16:04:44,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:04:44,474 INFO L93 Difference]: Finished difference Result 49532 states and 54970 transitions. [2018-10-24 16:04:44,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-24 16:04:44,475 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 576 [2018-10-24 16:04:44,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:04:44,507 INFO L225 Difference]: With dead ends: 49532 [2018-10-24 16:04:44,507 INFO L226 Difference]: Without dead ends: 30556 [2018-10-24 16:04:44,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 573 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2018-10-24 16:04:44,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30556 states. [2018-10-24 16:04:44,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30556 to 28049. [2018-10-24 16:04:44,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28049 states. [2018-10-24 16:04:44,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28049 states to 28049 states and 31182 transitions. [2018-10-24 16:04:44,851 INFO L78 Accepts]: Start accepts. Automaton has 28049 states and 31182 transitions. Word has length 576 [2018-10-24 16:04:44,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:04:44,852 INFO L481 AbstractCegarLoop]: Abstraction has 28049 states and 31182 transitions. [2018-10-24 16:04:44,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 16:04:44,852 INFO L276 IsEmpty]: Start isEmpty. Operand 28049 states and 31182 transitions. [2018-10-24 16:04:44,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 589 [2018-10-24 16:04:44,879 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:04:44,880 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:04:44,880 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:04:44,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:04:44,880 INFO L82 PathProgramCache]: Analyzing trace with hash 507591029, now seen corresponding path program 1 times [2018-10-24 16:04:44,881 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:04:44,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:04:44,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:44,882 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:04:44,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:44,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:04:45,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1186 backedges. 605 proven. 0 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2018-10-24 16:04:45,619 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:04:45,619 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:04:45,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:04:45,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:04:45,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:04:45,623 INFO L87 Difference]: Start difference. First operand 28049 states and 31182 transitions. Second operand 3 states. [2018-10-24 16:04:46,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:04:46,734 INFO L93 Difference]: Finished difference Result 57201 states and 63569 transitions. [2018-10-24 16:04:46,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:04:46,735 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 588 [2018-10-24 16:04:46,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:04:46,763 INFO L225 Difference]: With dead ends: 57201 [2018-10-24 16:04:46,764 INFO L226 Difference]: Without dead ends: 27284 [2018-10-24 16:04:46,780 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:04:46,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27284 states. [2018-10-24 16:04:47,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27284 to 27099. [2018-10-24 16:04:47,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27099 states. [2018-10-24 16:04:47,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27099 states to 27099 states and 29577 transitions. [2018-10-24 16:04:47,038 INFO L78 Accepts]: Start accepts. Automaton has 27099 states and 29577 transitions. Word has length 588 [2018-10-24 16:04:47,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:04:47,039 INFO L481 AbstractCegarLoop]: Abstraction has 27099 states and 29577 transitions. [2018-10-24 16:04:47,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:04:47,039 INFO L276 IsEmpty]: Start isEmpty. Operand 27099 states and 29577 transitions. [2018-10-24 16:04:47,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2018-10-24 16:04:47,058 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:04:47,059 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:04:47,059 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:04:47,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:04:47,060 INFO L82 PathProgramCache]: Analyzing trace with hash -991108154, now seen corresponding path program 1 times [2018-10-24 16:04:47,060 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:04:47,060 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:04:47,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:47,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:04:47,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:47,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:04:48,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 595 proven. 368 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2018-10-24 16:04:48,694 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:04:48,694 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:04:48,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:04:48,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:04:48,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:04:49,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 653 proven. 24 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2018-10-24 16:04:49,807 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:04:49,808 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 9 [2018-10-24 16:04:49,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 16:04:49,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 16:04:49,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-10-24 16:04:49,809 INFO L87 Difference]: Start difference. First operand 27099 states and 29577 transitions. Second operand 10 states. [2018-10-24 16:04:54,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:04:54,280 INFO L93 Difference]: Finished difference Result 52820 states and 57592 transitions. [2018-10-24 16:04:54,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-24 16:04:54,280 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 596 [2018-10-24 16:04:54,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:04:54,305 INFO L225 Difference]: With dead ends: 52820 [2018-10-24 16:04:54,306 INFO L226 Difference]: Without dead ends: 27760 [2018-10-24 16:04:54,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 594 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2018-10-24 16:04:54,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27760 states. [2018-10-24 16:04:54,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27760 to 27099. [2018-10-24 16:04:54,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27099 states. [2018-10-24 16:04:54,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27099 states to 27099 states and 29571 transitions. [2018-10-24 16:04:54,585 INFO L78 Accepts]: Start accepts. Automaton has 27099 states and 29571 transitions. Word has length 596 [2018-10-24 16:04:54,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:04:54,585 INFO L481 AbstractCegarLoop]: Abstraction has 27099 states and 29571 transitions. [2018-10-24 16:04:54,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 16:04:54,586 INFO L276 IsEmpty]: Start isEmpty. Operand 27099 states and 29571 transitions. [2018-10-24 16:04:54,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 800 [2018-10-24 16:04:54,602 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:04:54,603 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2018-10-24 16:04:54,603 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:04:54,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:04:54,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1927532272, now seen corresponding path program 1 times [2018-10-24 16:04:54,604 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:04:54,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:04:54,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:54,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:04:54,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:54,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:04:56,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2338 backedges. 1090 proven. 0 refuted. 0 times theorem prover too weak. 1248 trivial. 0 not checked. [2018-10-24 16:04:56,068 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:04:56,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:04:56,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:04:56,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:04:56,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:04:56,070 INFO L87 Difference]: Start difference. First operand 27099 states and 29571 transitions. Second operand 5 states. [2018-10-24 16:04:58,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:04:58,803 INFO L93 Difference]: Finished difference Result 53646 states and 58631 transitions. [2018-10-24 16:04:58,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:04:58,804 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 799 [2018-10-24 16:04:58,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:04:58,829 INFO L225 Difference]: With dead ends: 53646 [2018-10-24 16:04:58,830 INFO L226 Difference]: Without dead ends: 26734 [2018-10-24 16:04:58,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:04:58,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26734 states. [2018-10-24 16:04:59,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26734 to 23763. [2018-10-24 16:04:59,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23763 states. [2018-10-24 16:04:59,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23763 states to 23763 states and 25456 transitions. [2018-10-24 16:04:59,051 INFO L78 Accepts]: Start accepts. Automaton has 23763 states and 25456 transitions. Word has length 799 [2018-10-24 16:04:59,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:04:59,051 INFO L481 AbstractCegarLoop]: Abstraction has 23763 states and 25456 transitions. [2018-10-24 16:04:59,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:04:59,052 INFO L276 IsEmpty]: Start isEmpty. Operand 23763 states and 25456 transitions. [2018-10-24 16:04:59,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 869 [2018-10-24 16:04:59,067 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:04:59,068 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:04:59,068 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:04:59,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:04:59,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1966311317, now seen corresponding path program 1 times [2018-10-24 16:04:59,068 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:04:59,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:04:59,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:59,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:04:59,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:04:59,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:04:59,703 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-24 16:05:00,166 WARN L179 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2018-10-24 16:05:00,652 WARN L179 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2018-10-24 16:05:02,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2497 backedges. 1145 proven. 112 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2018-10-24 16:05:02,067 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:05:02,067 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:05:02,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:05:02,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:05:02,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:05:09,100 WARN L179 SmtUtils]: Spent 6.51 s on a formula simplification. DAG size of input: 57 DAG size of output: 28 [2018-10-24 16:05:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2497 backedges. 1498 proven. 409 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2018-10-24 16:05:10,617 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:05:10,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2018-10-24 16:05:10,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 16:05:10,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 16:05:10,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2018-10-24 16:05:10,619 INFO L87 Difference]: Start difference. First operand 23763 states and 25456 transitions. Second operand 13 states. Received shutdown request... [2018-10-24 16:07:44,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:07:44,674 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 16:07:44,679 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 16:07:44,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 04:07:44 BoogieIcfgContainer [2018-10-24 16:07:44,679 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 16:07:44,680 INFO L168 Benchmark]: Toolchain (without parser) took 249330.34 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 3.3 GB in the end (delta: -1.9 GB). Peak memory consumption was 618.1 MB. Max. memory is 7.1 GB. [2018-10-24 16:07:44,682 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 16:07:44,682 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1066.34 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. [2018-10-24 16:07:44,683 INFO L168 Benchmark]: Boogie Procedure Inliner took 294.49 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 764.9 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -847.3 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. [2018-10-24 16:07:44,686 INFO L168 Benchmark]: Boogie Preprocessor took 128.45 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2018-10-24 16:07:44,687 INFO L168 Benchmark]: RCFGBuilder took 4501.09 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 182.6 MB). Peak memory consumption was 182.6 MB. Max. memory is 7.1 GB. [2018-10-24 16:07:44,687 INFO L168 Benchmark]: TraceAbstraction took 243333.67 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 3.3 GB in the end (delta: -1.3 GB). Peak memory consumption was 451.8 MB. Max. memory is 7.1 GB. [2018-10-24 16:07:44,694 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1066.34 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 294.49 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 764.9 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -847.3 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.45 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4501.09 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 182.6 MB). Peak memory consumption was 182.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 243333.67 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 3.3 GB in the end (delta: -1.3 GB). Peak memory consumption was 451.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 189]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 189). Cancelled while BasicCegarLoop was constructing difference of abstraction (23763states) and FLOYD_HOARE automaton (currently 3 states, 13 states before enhancement),while ReachableStatesComputation was computing reachable states (77 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 284 locations, 1 error locations. TIMEOUT Result, 243.2s OverallTime, 18 OverallIterations, 8 TraceHistogramMax, 212.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3960 SDtfs, 8943 SDslu, 1828 SDs, 0 SdLazy, 21954 SolverSat, 4338 SolverUnsat, 76 SolverUnknown, 0 SolverNotchecked, 199.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2543 GetRequests, 2458 SyntacticMatches, 8 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 15.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28049occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 3.4s AutomataMinimizationTime, 17 MinimizatonAttempts, 17378 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 19.7s InterpolantComputationTime, 9846 NumberOfCodeBlocks, 9846 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 9824 ConstructedInterpolants, 452 QuantifiedInterpolants, 28699693 SizeOfPredicates, 8 NumberOfNonLiveVariables, 3145 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 22 InterpolantComputations, 14 PerfectInterpolantSequences, 15687/17374 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown