java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label02_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dace188-m [2018-09-14 16:00:02,330 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-14 16:00:02,332 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-14 16:00:02,347 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-14 16:00:02,347 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-14 16:00:02,349 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-14 16:00:02,350 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-14 16:00:02,354 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-14 16:00:02,357 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-14 16:00:02,359 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-14 16:00:02,360 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-14 16:00:02,360 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-14 16:00:02,361 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-14 16:00:02,363 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-14 16:00:02,365 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-14 16:00:02,374 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-14 16:00:02,375 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-14 16:00:02,376 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-14 16:00:02,378 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-14 16:00:02,379 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-14 16:00:02,381 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-14 16:00:02,382 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-14 16:00:02,384 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-14 16:00:02,384 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-14 16:00:02,384 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-14 16:00:02,385 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-14 16:00:02,390 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-14 16:00:02,390 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-14 16:00:02,391 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-14 16:00:02,392 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-14 16:00:02,394 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-14 16:00:02,395 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-14 16:00:02,395 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-14 16:00:02,395 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-14 16:00:02,399 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-14 16:00:02,400 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-14 16:00:02,400 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-14 16:00:02,429 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-14 16:00:02,429 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-14 16:00:02,431 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-14 16:00:02,431 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-14 16:00:02,431 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-14 16:00:02,432 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-14 16:00:02,432 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-14 16:00:02,432 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-14 16:00:02,432 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-14 16:00:02,432 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-14 16:00:02,433 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-14 16:00:02,434 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-14 16:00:02,434 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-14 16:00:02,434 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-14 16:00:02,435 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-14 16:00:02,435 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-14 16:00:02,435 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-14 16:00:02,435 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-14 16:00:02,435 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-14 16:00:02,436 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-14 16:00:02,436 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-14 16:00:02,436 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-14 16:00:02,436 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-14 16:00:02,439 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 16:00:02,439 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-14 16:00:02,439 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-14 16:00:02,439 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-14 16:00:02,440 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-14 16:00:02,440 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-14 16:00:02,440 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-14 16:00:02,440 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-14 16:00:02,440 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-14 16:00:02,440 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-14 16:00:02,514 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-14 16:00:02,531 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-14 16:00:02,537 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-14 16:00:02,539 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-14 16:00:02,539 INFO L276 PluginConnector]: CDTParser initialized [2018-09-14 16:00:02,540 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label02_true-unreach-call.c [2018-09-14 16:00:02,908 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/509984679/8a9b82c25bde494696a3252cf9983fcb/FLAGdd4007487 [2018-09-14 16:00:03,258 INFO L277 CDTParser]: Found 1 translation units. [2018-09-14 16:00:03,259 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label02_true-unreach-call.c [2018-09-14 16:00:03,279 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/509984679/8a9b82c25bde494696a3252cf9983fcb/FLAGdd4007487 [2018-09-14 16:00:03,294 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/509984679/8a9b82c25bde494696a3252cf9983fcb [2018-09-14 16:00:03,306 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-14 16:00:03,309 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-14 16:00:03,309 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-14 16:00:03,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-14 16:00:03,316 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-14 16:00:03,317 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 04:00:03" (1/1) ... [2018-09-14 16:00:03,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@201dfe03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:03, skipping insertion in model container [2018-09-14 16:00:03,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 04:00:03" (1/1) ... [2018-09-14 16:00:03,332 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-14 16:00:04,076 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 16:00:04,095 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-14 16:00:04,331 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 16:00:04,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:04 WrapperNode [2018-09-14 16:00:04,412 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-14 16:00:04,413 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-14 16:00:04,414 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-14 16:00:04,414 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-14 16:00:04,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:04" (1/1) ... [2018-09-14 16:00:04,477 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:04" (1/1) ... [2018-09-14 16:00:04,579 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-14 16:00:04,580 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-14 16:00:04,580 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-14 16:00:04,580 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-14 16:00:04,832 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:04" (1/1) ... [2018-09-14 16:00:04,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:04" (1/1) ... [2018-09-14 16:00:04,841 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:04" (1/1) ... [2018-09-14 16:00:04,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:04" (1/1) ... [2018-09-14 16:00:04,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:04" (1/1) ... [2018-09-14 16:00:04,919 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:04" (1/1) ... [2018-09-14 16:00:04,937 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:04" (1/1) ... [2018-09-14 16:00:04,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-14 16:00:04,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-14 16:00:04,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-14 16:00:04,954 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-14 16:00:04,955 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 16:00:05,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-14 16:00:05,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-14 16:00:05,029 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-14 16:00:05,029 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-14 16:00:05,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-14 16:00:05,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-14 16:00:05,030 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-14 16:00:05,030 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-14 16:00:09,698 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-14 16:00:09,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 04:00:09 BoogieIcfgContainer [2018-09-14 16:00:09,701 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-14 16:00:09,702 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-14 16:00:09,702 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-14 16:00:09,708 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-14 16:00:09,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 04:00:03" (1/3) ... [2018-09-14 16:00:09,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544d6bc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 04:00:09, skipping insertion in model container [2018-09-14 16:00:09,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:04" (2/3) ... [2018-09-14 16:00:09,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544d6bc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 04:00:09, skipping insertion in model container [2018-09-14 16:00:09,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 04:00:09" (3/3) ... [2018-09-14 16:00:09,714 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label02_true-unreach-call.c [2018-09-14 16:00:09,725 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-14 16:00:09,736 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-14 16:00:09,808 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-14 16:00:09,809 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-14 16:00:09,809 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-14 16:00:09,809 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-14 16:00:09,809 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-14 16:00:09,810 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-14 16:00:09,810 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-14 16:00:09,810 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-14 16:00:09,810 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-14 16:00:09,860 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-09-14 16:00:09,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-09-14 16:00:09,892 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:00:09,897 INFO L376 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:00:09,898 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:00:09,904 INFO L82 PathProgramCache]: Analyzing trace with hash -598377940, now seen corresponding path program 1 times [2018-09-14 16:00:09,908 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:00:09,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:09,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:09,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:09,970 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:00:10,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:10,877 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 16:00:11,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:11,091 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:00:11,091 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 16:00:11,091 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:00:11,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:00:11,113 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:00:11,114 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:00:11,117 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-09-14 16:00:13,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:00:13,217 INFO L93 Difference]: Finished difference Result 838 states and 1479 transitions. [2018-09-14 16:00:13,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:00:13,220 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 211 [2018-09-14 16:00:13,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:00:13,244 INFO L225 Difference]: With dead ends: 838 [2018-09-14 16:00:13,244 INFO L226 Difference]: Without dead ends: 524 [2018-09-14 16:00:13,258 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:00:13,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2018-09-14 16:00:13,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 522. [2018-09-14 16:00:13,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2018-09-14 16:00:13,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 890 transitions. [2018-09-14 16:00:13,356 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 890 transitions. Word has length 211 [2018-09-14 16:00:13,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:00:13,358 INFO L480 AbstractCegarLoop]: Abstraction has 522 states and 890 transitions. [2018-09-14 16:00:13,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:00:13,358 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 890 transitions. [2018-09-14 16:00:13,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-09-14 16:00:13,372 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:00:13,373 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:00:13,373 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:00:13,375 INFO L82 PathProgramCache]: Analyzing trace with hash 500762469, now seen corresponding path program 1 times [2018-09-14 16:00:13,375 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:00:13,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:13,378 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:13,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:13,379 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:00:13,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:13,744 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:13,744 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:00:13,745 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 16:00:13,745 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:00:13,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:00:13,747 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:00:13,747 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 16:00:13,748 INFO L87 Difference]: Start difference. First operand 522 states and 890 transitions. Second operand 6 states. [2018-09-14 16:00:17,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:00:17,553 INFO L93 Difference]: Finished difference Result 1581 states and 2759 transitions. [2018-09-14 16:00:17,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-14 16:00:17,563 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 221 [2018-09-14 16:00:17,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:00:17,575 INFO L225 Difference]: With dead ends: 1581 [2018-09-14 16:00:17,575 INFO L226 Difference]: Without dead ends: 1065 [2018-09-14 16:00:17,578 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-14 16:00:17,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2018-09-14 16:00:17,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1023. [2018-09-14 16:00:17,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1023 states. [2018-09-14 16:00:17,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1733 transitions. [2018-09-14 16:00:17,656 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1733 transitions. Word has length 221 [2018-09-14 16:00:17,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:00:17,657 INFO L480 AbstractCegarLoop]: Abstraction has 1023 states and 1733 transitions. [2018-09-14 16:00:17,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:00:17,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1733 transitions. [2018-09-14 16:00:17,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-09-14 16:00:17,664 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:00:17,664 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:00:17,664 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:00:17,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1880963624, now seen corresponding path program 1 times [2018-09-14 16:00:17,665 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:00:17,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:17,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:17,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:17,666 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:00:17,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:18,018 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:18,018 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:00:18,019 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 16:00:18,019 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:00:18,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:00:18,022 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:00:18,022 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:00:18,024 INFO L87 Difference]: Start difference. First operand 1023 states and 1733 transitions. Second operand 3 states. [2018-09-14 16:00:21,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:00:21,116 INFO L93 Difference]: Finished difference Result 2901 states and 5098 transitions. [2018-09-14 16:00:21,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:00:21,120 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 224 [2018-09-14 16:00:21,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:00:21,138 INFO L225 Difference]: With dead ends: 2901 [2018-09-14 16:00:21,138 INFO L226 Difference]: Without dead ends: 1884 [2018-09-14 16:00:21,143 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:00:21,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2018-09-14 16:00:21,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1864. [2018-09-14 16:00:21,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1864 states. [2018-09-14 16:00:21,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 3159 transitions. [2018-09-14 16:00:21,216 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 3159 transitions. Word has length 224 [2018-09-14 16:00:21,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:00:21,217 INFO L480 AbstractCegarLoop]: Abstraction has 1864 states and 3159 transitions. [2018-09-14 16:00:21,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:00:21,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 3159 transitions. [2018-09-14 16:00:21,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-09-14 16:00:21,227 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:00:21,227 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:00:21,228 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:00:21,228 INFO L82 PathProgramCache]: Analyzing trace with hash 651322454, now seen corresponding path program 1 times [2018-09-14 16:00:21,228 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:00:21,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:21,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:21,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:21,229 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:00:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:21,476 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 16:00:21,520 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:00:21,521 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:00:21,521 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 16:00:21,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:21,533 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:00:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:21,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:00:22,127 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-09-14 16:00:22,127 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:00:22,354 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-14 16:00:22,458 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-14 16:00:22,678 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:00:22,700 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:00:22,700 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2018-09-14 16:00:22,700 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:00:22,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:00:22,702 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:00:22,702 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-09-14 16:00:22,702 INFO L87 Difference]: Start difference. First operand 1864 states and 3159 transitions. Second operand 5 states. [2018-09-14 16:00:26,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:00:26,521 INFO L93 Difference]: Finished difference Result 6028 states and 10772 transitions. [2018-09-14 16:00:26,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 16:00:26,529 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 232 [2018-09-14 16:00:26,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:00:26,567 INFO L225 Difference]: With dead ends: 6028 [2018-09-14 16:00:26,567 INFO L226 Difference]: Without dead ends: 4170 [2018-09-14 16:00:26,578 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 458 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-09-14 16:00:26,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2018-09-14 16:00:26,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 3813. [2018-09-14 16:00:26,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3813 states. [2018-09-14 16:00:26,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 6250 transitions. [2018-09-14 16:00:26,740 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 6250 transitions. Word has length 232 [2018-09-14 16:00:26,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:00:26,741 INFO L480 AbstractCegarLoop]: Abstraction has 3813 states and 6250 transitions. [2018-09-14 16:00:26,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:00:26,741 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 6250 transitions. [2018-09-14 16:00:26,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-09-14 16:00:26,760 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:00:26,760 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:00:26,760 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:00:26,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1307188554, now seen corresponding path program 1 times [2018-09-14 16:00:26,761 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:00:26,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:26,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:26,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:26,762 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:00:26,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:27,127 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:27,127 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:00:27,127 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 16:00:27,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:27,135 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:00:27,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:27,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:00:27,431 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-14 16:00:27,432 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:00:27,741 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-14 16:00:27,766 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:00:27,767 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-09-14 16:00:27,767 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:00:27,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:00:27,768 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:00:27,768 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-09-14 16:00:27,769 INFO L87 Difference]: Start difference. First operand 3813 states and 6250 transitions. Second operand 5 states. [2018-09-14 16:00:28,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:00:28,669 INFO L93 Difference]: Finished difference Result 11434 states and 18968 transitions. [2018-09-14 16:00:28,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-14 16:00:28,672 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 243 [2018-09-14 16:00:28,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:00:28,718 INFO L225 Difference]: With dead ends: 11434 [2018-09-14 16:00:28,718 INFO L226 Difference]: Without dead ends: 7627 [2018-09-14 16:00:28,733 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 478 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-09-14 16:00:28,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7627 states. [2018-09-14 16:00:28,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7627 to 7619. [2018-09-14 16:00:28,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7619 states. [2018-09-14 16:00:28,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7619 states to 7619 states and 12660 transitions. [2018-09-14 16:00:28,951 INFO L78 Accepts]: Start accepts. Automaton has 7619 states and 12660 transitions. Word has length 243 [2018-09-14 16:00:28,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:00:28,951 INFO L480 AbstractCegarLoop]: Abstraction has 7619 states and 12660 transitions. [2018-09-14 16:00:28,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:00:28,952 INFO L276 IsEmpty]: Start isEmpty. Operand 7619 states and 12660 transitions. [2018-09-14 16:00:28,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-09-14 16:00:28,982 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:00:28,982 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:00:28,983 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:00:28,983 INFO L82 PathProgramCache]: Analyzing trace with hash 987224918, now seen corresponding path program 1 times [2018-09-14 16:00:28,983 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:00:28,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:28,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:28,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:28,984 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:00:29,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:29,447 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-09-14 16:00:29,820 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-09-14 16:00:29,821 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:00:29,821 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 16:00:29,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:29,835 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:00:30,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:30,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:00:30,399 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 63 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-09-14 16:00:30,399 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:00:30,965 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-09-14 16:00:30,999 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:00:31,000 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:00:31,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:31,032 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:00:31,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:31,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:00:31,792 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 63 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-09-14 16:00:31,793 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:00:32,076 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-09-14 16:00:32,079 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:00:32,080 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 5, 5] total 16 [2018-09-14 16:00:32,080 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:00:32,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-14 16:00:32,082 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-14 16:00:32,082 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2018-09-14 16:00:32,083 INFO L87 Difference]: Start difference. First operand 7619 states and 12660 transitions. Second operand 10 states. [2018-09-14 16:00:48,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:00:48,484 INFO L93 Difference]: Finished difference Result 25856 states and 60229 transitions. [2018-09-14 16:00:48,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-14 16:00:48,485 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 258 [2018-09-14 16:00:48,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:00:48,692 INFO L225 Difference]: With dead ends: 25856 [2018-09-14 16:00:48,692 INFO L226 Difference]: Without dead ends: 18243 [2018-09-14 16:00:48,794 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1121 GetRequests, 1063 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=625, Invalid=2681, Unknown=0, NotChecked=0, Total=3306 [2018-09-14 16:00:48,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18243 states. [2018-09-14 16:00:49,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18243 to 17069. [2018-09-14 16:00:49,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17069 states. [2018-09-14 16:00:49,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17069 states to 17069 states and 27552 transitions. [2018-09-14 16:00:49,853 INFO L78 Accepts]: Start accepts. Automaton has 17069 states and 27552 transitions. Word has length 258 [2018-09-14 16:00:49,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:00:49,853 INFO L480 AbstractCegarLoop]: Abstraction has 17069 states and 27552 transitions. [2018-09-14 16:00:49,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-14 16:00:49,854 INFO L276 IsEmpty]: Start isEmpty. Operand 17069 states and 27552 transitions. [2018-09-14 16:00:49,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2018-09-14 16:00:49,982 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:00:49,983 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:00:49,983 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:00:49,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1956908726, now seen corresponding path program 1 times [2018-09-14 16:00:49,984 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:00:49,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:49,985 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:49,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:49,985 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:00:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:50,836 WARN L178 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-09-14 16:00:51,096 WARN L178 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-09-14 16:00:51,669 WARN L178 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-09-14 16:00:51,867 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-09-14 16:00:51,867 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:00:51,867 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 16:00:51,867 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:00:51,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:00:51,868 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:00:51,868 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-14 16:00:51,869 INFO L87 Difference]: Start difference. First operand 17069 states and 27552 transitions. Second operand 6 states. [2018-09-14 16:00:54,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:00:54,431 INFO L93 Difference]: Finished difference Result 36794 states and 59058 transitions. [2018-09-14 16:00:54,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-14 16:00:54,432 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 259 [2018-09-14 16:00:54,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:00:54,533 INFO L225 Difference]: With dead ends: 36794 [2018-09-14 16:00:54,534 INFO L226 Difference]: Without dead ends: 20989 [2018-09-14 16:00:54,585 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-14 16:00:54,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20989 states. [2018-09-14 16:00:55,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20989 to 19580. [2018-09-14 16:00:55,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19580 states. [2018-09-14 16:00:55,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19580 states to 19580 states and 30652 transitions. [2018-09-14 16:00:55,206 INFO L78 Accepts]: Start accepts. Automaton has 19580 states and 30652 transitions. Word has length 259 [2018-09-14 16:00:55,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:00:55,207 INFO L480 AbstractCegarLoop]: Abstraction has 19580 states and 30652 transitions. [2018-09-14 16:00:55,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:00:55,207 INFO L276 IsEmpty]: Start isEmpty. Operand 19580 states and 30652 transitions. [2018-09-14 16:00:55,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2018-09-14 16:00:55,327 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:00:55,327 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:00:55,328 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:00:55,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1644894672, now seen corresponding path program 1 times [2018-09-14 16:00:55,328 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:00:55,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:55,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:55,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:55,329 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:00:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:55,902 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:55,903 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:00:55,903 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:00:55,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:55,912 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:00:56,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:56,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:00:56,883 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-09-14 16:00:56,883 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:00:57,229 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-09-14 16:00:57,251 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 16:00:57,252 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 11 [2018-09-14 16:00:57,252 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:00:57,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:00:57,253 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:00:57,253 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-09-14 16:00:57,253 INFO L87 Difference]: Start difference. First operand 19580 states and 30652 transitions. Second operand 5 states. [2018-09-14 16:00:59,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:00:59,714 INFO L93 Difference]: Finished difference Result 58520 states and 97031 transitions. [2018-09-14 16:00:59,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 16:00:59,715 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 281 [2018-09-14 16:00:59,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:00:59,944 INFO L225 Difference]: With dead ends: 58520 [2018-09-14 16:00:59,944 INFO L226 Difference]: Without dead ends: 38976 [2018-09-14 16:01:00,039 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 568 GetRequests, 554 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-09-14 16:01:00,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38976 states. [2018-09-14 16:01:01,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38976 to 36611. [2018-09-14 16:01:01,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36611 states. [2018-09-14 16:01:01,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36611 states to 36611 states and 57525 transitions. [2018-09-14 16:01:01,207 INFO L78 Accepts]: Start accepts. Automaton has 36611 states and 57525 transitions. Word has length 281 [2018-09-14 16:01:01,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:01:01,208 INFO L480 AbstractCegarLoop]: Abstraction has 36611 states and 57525 transitions. [2018-09-14 16:01:01,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:01:01,208 INFO L276 IsEmpty]: Start isEmpty. Operand 36611 states and 57525 transitions. [2018-09-14 16:01:01,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2018-09-14 16:01:01,349 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:01:01,349 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:01:01,350 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:01:01,350 INFO L82 PathProgramCache]: Analyzing trace with hash -322085529, now seen corresponding path program 1 times [2018-09-14 16:01:01,350 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:01:01,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:01,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:01,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:01,352 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:01:01,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 98 proven. 17 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-09-14 16:01:01,645 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:01:01,645 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:01:01,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:01,662 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:01:02,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:02,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:01:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 79 proven. 4 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-09-14 16:01:02,427 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:01:02,616 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-09-14 16:01:02,638 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:01:02,639 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-09-14 16:01:02,639 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:01:02,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:01:02,640 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:01:02,640 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-09-14 16:01:02,642 INFO L87 Difference]: Start difference. First operand 36611 states and 57525 transitions. Second operand 5 states. [2018-09-14 16:01:05,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:01:05,466 INFO L93 Difference]: Finished difference Result 110005 states and 175707 transitions. [2018-09-14 16:01:05,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 16:01:05,467 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 297 [2018-09-14 16:01:05,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:01:05,904 INFO L225 Difference]: With dead ends: 110005 [2018-09-14 16:01:05,904 INFO L226 Difference]: Without dead ends: 73415 [2018-09-14 16:01:06,076 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 584 SyntacticMatches, 7 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-09-14 16:01:06,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73415 states. [2018-09-14 16:01:08,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73415 to 67159. [2018-09-14 16:01:08,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67159 states. [2018-09-14 16:01:08,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67159 states to 67159 states and 104014 transitions. [2018-09-14 16:01:08,428 INFO L78 Accepts]: Start accepts. Automaton has 67159 states and 104014 transitions. Word has length 297 [2018-09-14 16:01:08,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:01:08,428 INFO L480 AbstractCegarLoop]: Abstraction has 67159 states and 104014 transitions. [2018-09-14 16:01:08,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:01:08,429 INFO L276 IsEmpty]: Start isEmpty. Operand 67159 states and 104014 transitions. [2018-09-14 16:01:08,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-09-14 16:01:08,660 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:01:08,660 INFO L376 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:01:08,661 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:01:08,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1499709275, now seen corresponding path program 1 times [2018-09-14 16:01:08,661 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:01:08,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:08,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:08,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:08,662 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:01:08,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:09,019 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 16:01:09,892 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 99 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:09,892 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:01:09,892 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:01:09,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:09,900 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:01:10,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:10,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:01:10,184 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:10,184 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:01:10,315 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:10,337 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:01:10,337 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:01:10,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:10,355 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:01:10,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:10,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:01:10,899 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:10,899 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:01:10,994 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:10,997 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:01:10,997 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5, 5, 5] total 15 [2018-09-14 16:01:10,997 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:01:10,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-14 16:01:10,998 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-14 16:01:10,998 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2018-09-14 16:01:10,999 INFO L87 Difference]: Start difference. First operand 67159 states and 104014 transitions. Second operand 13 states. [2018-09-14 16:01:13,549 WARN L178 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2018-09-14 16:01:19,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:01:19,363 INFO L93 Difference]: Finished difference Result 180176 states and 368594 transitions. [2018-09-14 16:01:19,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-14 16:01:19,363 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 315 [2018-09-14 16:01:19,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:01:21,719 INFO L225 Difference]: With dead ends: 180176 [2018-09-14 16:01:21,720 INFO L226 Difference]: Without dead ends: 113188 [2018-09-14 16:01:21,895 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1307 GetRequests, 1265 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=377, Invalid=1105, Unknown=0, NotChecked=0, Total=1482 [2018-09-14 16:01:21,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113188 states. [2018-09-14 16:01:25,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113188 to 104999. [2018-09-14 16:01:25,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104999 states. [2018-09-14 16:01:25,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104999 states to 104999 states and 173503 transitions. [2018-09-14 16:01:25,921 INFO L78 Accepts]: Start accepts. Automaton has 104999 states and 173503 transitions. Word has length 315 [2018-09-14 16:01:25,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:01:25,922 INFO L480 AbstractCegarLoop]: Abstraction has 104999 states and 173503 transitions. [2018-09-14 16:01:25,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-14 16:01:25,922 INFO L276 IsEmpty]: Start isEmpty. Operand 104999 states and 173503 transitions. [2018-09-14 16:01:27,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2018-09-14 16:01:27,557 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:01:27,558 INFO L376 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:01:27,558 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:01:27,559 INFO L82 PathProgramCache]: Analyzing trace with hash 492145254, now seen corresponding path program 1 times [2018-09-14 16:01:27,559 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:01:27,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:27,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:27,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:27,560 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:01:27,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:27,881 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 16:01:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 133 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:01:28,080 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:01:28,080 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:01:28,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:28,090 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:01:28,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:28,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:01:28,479 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-09-14 16:01:28,480 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:01:28,743 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 133 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:01:28,765 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:01:28,765 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2018-09-14 16:01:28,765 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:01:28,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:01:28,766 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:01:28,767 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-09-14 16:01:28,767 INFO L87 Difference]: Start difference. First operand 104999 states and 173503 transitions. Second operand 6 states. [2018-09-14 16:01:36,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:01:36,694 INFO L93 Difference]: Finished difference Result 225596 states and 395772 transitions. [2018-09-14 16:01:36,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-14 16:01:36,694 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 352 [2018-09-14 16:01:36,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:01:37,721 INFO L225 Difference]: With dead ends: 225596 [2018-09-14 16:01:37,722 INFO L226 Difference]: Without dead ends: 117957 [2018-09-14 16:01:38,136 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 717 GetRequests, 696 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2018-09-14 16:01:38,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117957 states. [2018-09-14 16:01:42,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117957 to 110580. [2018-09-14 16:01:42,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110580 states. [2018-09-14 16:01:43,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110580 states to 110580 states and 178924 transitions. [2018-09-14 16:01:43,494 INFO L78 Accepts]: Start accepts. Automaton has 110580 states and 178924 transitions. Word has length 352 [2018-09-14 16:01:43,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:01:43,494 INFO L480 AbstractCegarLoop]: Abstraction has 110580 states and 178924 transitions. [2018-09-14 16:01:43,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:01:43,495 INFO L276 IsEmpty]: Start isEmpty. Operand 110580 states and 178924 transitions. [2018-09-14 16:01:44,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-09-14 16:01:44,086 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:01:44,086 INFO L376 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:01:44,086 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:01:44,087 INFO L82 PathProgramCache]: Analyzing trace with hash 972424633, now seen corresponding path program 1 times [2018-09-14 16:01:44,087 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:01:44,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:44,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:44,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:44,088 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:01:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:44,493 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 137 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:01:44,493 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:01:44,493 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:01:44,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:44,501 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:01:44,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:44,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:01:45,571 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-09-14 16:01:45,572 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:01:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 137 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:01:45,877 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:01:45,877 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-14 16:01:45,877 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:01:45,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:01:45,878 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:01:45,878 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-09-14 16:01:45,879 INFO L87 Difference]: Start difference. First operand 110580 states and 178924 transitions. Second operand 5 states. [2018-09-14 16:01:58,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:01:58,194 INFO L93 Difference]: Finished difference Result 308760 states and 510483 transitions. [2018-09-14 16:01:58,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 16:01:58,195 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 354 [2018-09-14 16:01:58,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:01:59,432 INFO L225 Difference]: With dead ends: 308760 [2018-09-14 16:01:59,433 INFO L226 Difference]: Without dead ends: 198406 [2018-09-14 16:01:59,986 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 715 GetRequests, 703 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-09-14 16:02:00,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198406 states. [2018-09-14 16:02:05,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198406 to 184279. [2018-09-14 16:02:05,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184279 states. [2018-09-14 16:02:07,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184279 states to 184279 states and 301914 transitions. [2018-09-14 16:02:07,412 INFO L78 Accepts]: Start accepts. Automaton has 184279 states and 301914 transitions. Word has length 354 [2018-09-14 16:02:07,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:02:07,412 INFO L480 AbstractCegarLoop]: Abstraction has 184279 states and 301914 transitions. [2018-09-14 16:02:07,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:02:07,413 INFO L276 IsEmpty]: Start isEmpty. Operand 184279 states and 301914 transitions. [2018-09-14 16:02:08,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2018-09-14 16:02:08,395 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:02:08,395 INFO L376 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:02:08,395 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:02:08,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1012410568, now seen corresponding path program 1 times [2018-09-14 16:02:08,396 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:02:08,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:02:08,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:08,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:02:08,397 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:02:08,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:08,930 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 201 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:02:08,930 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:02:08,930 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:02:09,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:09,999 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:02:10,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:10,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:02:10,394 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 201 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:02:10,395 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:02:10,529 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 201 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:02:10,552 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:02:10,552 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:02:10,567 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:10,567 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:02:11,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:11,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:02:11,289 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 201 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:02:11,289 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:02:11,556 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 201 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:02:11,558 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:02:11,559 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 6, 6] total 19 [2018-09-14 16:02:11,559 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:02:11,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 16:02:11,560 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 16:02:11,560 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2018-09-14 16:02:11,560 INFO L87 Difference]: Start difference. First operand 184279 states and 301914 transitions. Second operand 9 states. [2018-09-14 16:02:32,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:02:32,335 INFO L93 Difference]: Finished difference Result 370983 states and 697667 transitions. [2018-09-14 16:02:32,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-14 16:02:32,336 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 355 [2018-09-14 16:02:32,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:02:33,665 INFO L225 Difference]: With dead ends: 370983 [2018-09-14 16:02:33,665 INFO L226 Difference]: Without dead ends: 187559 [2018-09-14 16:02:34,618 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1474 GetRequests, 1431 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=300, Invalid=1680, Unknown=0, NotChecked=0, Total=1980 [2018-09-14 16:02:34,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187559 states. [2018-09-14 16:02:41,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187559 to 170637. [2018-09-14 16:02:41,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170637 states. [2018-09-14 16:02:42,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170637 states to 170637 states and 257445 transitions. [2018-09-14 16:02:42,485 INFO L78 Accepts]: Start accepts. Automaton has 170637 states and 257445 transitions. Word has length 355 [2018-09-14 16:02:42,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:02:42,485 INFO L480 AbstractCegarLoop]: Abstraction has 170637 states and 257445 transitions. [2018-09-14 16:02:42,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 16:02:42,485 INFO L276 IsEmpty]: Start isEmpty. Operand 170637 states and 257445 transitions. [2018-09-14 16:02:43,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2018-09-14 16:02:43,119 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:02:43,119 INFO L376 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:02:43,119 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:02:43,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1941463000, now seen corresponding path program 1 times [2018-09-14 16:02:43,120 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:02:43,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:02:43,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:43,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:02:43,121 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:02:43,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:43,487 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 218 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:02:43,487 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:02:43,487 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:02:43,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:43,495 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:02:43,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:43,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:02:43,773 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 218 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:02:43,773 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:02:44,827 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 218 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:02:44,849 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:02:44,849 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:02:44,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:44,867 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:02:45,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:45,454 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:02:45,640 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 218 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:02:45,640 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:02:45,934 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 218 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:02:45,937 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:02:45,938 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 6, 6] total 16 [2018-09-14 16:02:45,938 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:02:45,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-14 16:02:45,939 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-14 16:02:45,939 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2018-09-14 16:02:45,940 INFO L87 Difference]: Start difference. First operand 170637 states and 257445 transitions. Second operand 7 states. [2018-09-14 16:03:00,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:03:00,486 INFO L93 Difference]: Finished difference Result 420617 states and 679153 transitions. [2018-09-14 16:03:00,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 16:03:00,488 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 374 [2018-09-14 16:03:00,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:03:02,810 INFO L225 Difference]: With dead ends: 420617 [2018-09-14 16:03:02,810 INFO L226 Difference]: Without dead ends: 278000 [2018-09-14 16:03:03,299 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1502 GetRequests, 1486 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2018-09-14 16:03:03,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278000 states. [2018-09-14 16:03:13,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278000 to 267265. [2018-09-14 16:03:13,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267265 states. [2018-09-14 16:03:15,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267265 states to 267265 states and 400497 transitions. [2018-09-14 16:03:15,586 INFO L78 Accepts]: Start accepts. Automaton has 267265 states and 400497 transitions. Word has length 374 [2018-09-14 16:03:15,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:03:15,587 INFO L480 AbstractCegarLoop]: Abstraction has 267265 states and 400497 transitions. [2018-09-14 16:03:15,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-14 16:03:15,587 INFO L276 IsEmpty]: Start isEmpty. Operand 267265 states and 400497 transitions. [2018-09-14 16:03:16,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2018-09-14 16:03:16,479 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:03:16,480 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:03:16,480 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:03:16,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1912658116, now seen corresponding path program 1 times [2018-09-14 16:03:16,480 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:03:16,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:16,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:16,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:16,482 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:03:16,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:16,825 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 199 proven. 17 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2018-09-14 16:03:16,825 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:03:16,825 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:03:16,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:16,834 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:03:18,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:18,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:03:18,365 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 198 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2018-09-14 16:03:18,366 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:03:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 165 proven. 97 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-09-14 16:03:18,592 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:03:18,593 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:03:18,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:18,608 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:03:19,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:19,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:03:19,379 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 198 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2018-09-14 16:03:19,379 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:03:19,631 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 165 proven. 97 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-09-14 16:03:19,633 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:03:19,634 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 6] total 14 [2018-09-14 16:03:19,634 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:03:19,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:03:19,635 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:03:19,635 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2018-09-14 16:03:19,636 INFO L87 Difference]: Start difference. First operand 267265 states and 400497 transitions. Second operand 6 states. [2018-09-14 16:03:29,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:03:29,578 INFO L93 Difference]: Finished difference Result 467963 states and 697151 transitions. [2018-09-14 16:03:29,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-14 16:03:29,579 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 377 [2018-09-14 16:03:29,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:03:30,464 INFO L225 Difference]: With dead ends: 467963 [2018-09-14 16:03:30,464 INFO L226 Difference]: Without dead ends: 215360 [2018-09-14 16:03:30,998 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1514 GetRequests, 1496 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-09-14 16:03:31,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215360 states. [2018-09-14 16:03:37,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215360 to 214837. [2018-09-14 16:03:37,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214837 states. Received shutdown request... [2018-09-14 16:03:37,351 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-14 16:03:37,358 WARN L206 ceAbstractionStarter]: Timeout [2018-09-14 16:03:37,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.09 04:03:37 BoogieIcfgContainer [2018-09-14 16:03:37,358 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-14 16:03:37,362 INFO L168 Benchmark]: Toolchain (without parser) took 214056.01 ms. Allocated memory was 1.5 GB in the beginning and 5.2 GB in the end (delta: 3.7 GB). Free memory was 1.4 GB in the beginning and 2.4 GB in the end (delta: -960.6 MB). Peak memory consumption was 4.3 GB. Max. memory is 7.1 GB. [2018-09-14 16:03:37,364 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-14 16:03:37,365 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1103.56 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. [2018-09-14 16:03:37,366 INFO L168 Benchmark]: Boogie Procedure Inliner took 166.04 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-09-14 16:03:37,366 INFO L168 Benchmark]: Boogie Preprocessor took 372.96 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 787.0 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -924.5 MB). Peak memory consumption was 48.4 MB. Max. memory is 7.1 GB. [2018-09-14 16:03:37,367 INFO L168 Benchmark]: RCFGBuilder took 4748.07 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: 260.4 MB). Peak memory consumption was 260.4 MB. Max. memory is 7.1 GB. [2018-09-14 16:03:37,368 INFO L168 Benchmark]: TraceAbstraction took 207656.14 ms. Allocated memory was 2.3 GB in the beginning and 5.2 GB in the end (delta: 2.9 GB). Free memory was 2.0 GB in the beginning and 2.4 GB in the end (delta: -414.2 MB). Peak memory consumption was 4.1 GB. Max. memory is 7.1 GB. [2018-09-14 16:03:37,373 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1103.56 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 166.04 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 372.96 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 787.0 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -924.5 MB). Peak memory consumption was 48.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4748.07 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: 260.4 MB). Peak memory consumption was 260.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 207656.14 ms. Allocated memory was 2.3 GB in the beginning and 5.2 GB in the end (delta: 2.9 GB). Free memory was 2.0 GB in the beginning and 2.4 GB in the end (delta: -414.2 MB). Peak memory consumption was 4.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1647]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1647). Cancelled while ReachableStatesComputation was computing reachable states (23508 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 207.5s OverallTime, 15 OverallIterations, 5 TraceHistogramMax, 125.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3416 SDtfs, 19748 SDslu, 5052 SDs, 0 SdLazy, 30634 SolverSat, 6151 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 46.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10507 GetRequests, 10223 SyntacticMatches, 44 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1986 ImplicationChecksByTransitivity, 10.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=267265occurred 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: 49.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 68983 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 6.1s SatisfiabilityAnalysisTime, 17.1s InterpolantComputationTime, 9470 NumberOfCodeBlocks, 9470 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 14540 ConstructedInterpolants, 0 QuantifiedInterpolants, 11292637 SizeOfPredicates, 24 NumberOfNonLiveVariables, 19211 ConjunctsInSsa, 136 ConjunctsInUnsatCore, 47 InterpolantComputations, 11 PerfectInterpolantSequences, 6263/6849 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label02_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-14_16-03-37-392.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label02_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-14_16-03-37-392.csv Completed graceful shutdown