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_label20_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-69f5bdd-m [2018-09-18 10:13:43,027 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-18 10:13:43,029 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-18 10:13:43,044 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-18 10:13:43,046 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-18 10:13:43,047 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-18 10:13:43,048 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-18 10:13:43,050 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-18 10:13:43,052 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-18 10:13:43,053 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-18 10:13:43,054 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-18 10:13:43,054 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-18 10:13:43,055 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-18 10:13:43,056 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-18 10:13:43,057 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-18 10:13:43,058 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-18 10:13:43,059 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-18 10:13:43,061 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-18 10:13:43,063 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-18 10:13:43,065 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-18 10:13:43,066 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-18 10:13:43,067 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-18 10:13:43,070 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-18 10:13:43,071 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-18 10:13:43,071 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-18 10:13:43,072 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-18 10:13:43,073 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-18 10:13:43,074 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-18 10:13:43,075 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-18 10:13:43,076 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-18 10:13:43,076 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-18 10:13:43,077 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-18 10:13:43,077 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-18 10:13:43,077 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-18 10:13:43,078 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-18 10:13:43,079 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-18 10:13:43,079 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 [2018-09-18 10:13:43,096 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-18 10:13:43,097 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-18 10:13:43,098 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-18 10:13:43,098 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-18 10:13:43,098 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-18 10:13:43,100 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-18 10:13:43,101 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-18 10:13:43,101 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-18 10:13:43,101 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-18 10:13:43,101 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-18 10:13:43,102 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-09-18 10:13:43,102 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-18 10:13:43,104 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-18 10:13:43,104 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-18 10:13:43,104 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-18 10:13:43,104 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-18 10:13:43,104 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-18 10:13:43,105 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-18 10:13:43,105 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-18 10:13:43,105 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-18 10:13:43,105 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-18 10:13:43,107 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-18 10:13:43,107 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-18 10:13:43,107 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-18 10:13:43,107 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-18 10:13:43,108 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-18 10:13:43,108 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-18 10:13:43,108 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-18 10:13:43,108 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-18 10:13:43,108 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-18 10:13:43,109 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-18 10:13:43,109 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-18 10:13:43,109 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-18 10:13:43,109 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-18 10:13:43,155 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-18 10:13:43,173 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-18 10:13:43,179 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-18 10:13:43,180 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-18 10:13:43,181 INFO L276 PluginConnector]: CDTParser initialized [2018-09-18 10:13:43,182 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label20_true-unreach-call.c [2018-09-18 10:13:43,575 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/363579be7/6a2d62b46af645918dec11aab21d7f92/FLAGaebedf346 [2018-09-18 10:13:43,934 INFO L277 CDTParser]: Found 1 translation units. [2018-09-18 10:13:43,936 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label20_true-unreach-call.c [2018-09-18 10:13:43,954 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/363579be7/6a2d62b46af645918dec11aab21d7f92/FLAGaebedf346 [2018-09-18 10:13:43,976 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/363579be7/6a2d62b46af645918dec11aab21d7f92 [2018-09-18 10:13:43,989 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-18 10:13:43,995 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-18 10:13:44,000 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-18 10:13:44,000 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-18 10:13:44,006 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-18 10:13:44,008 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 10:13:43" (1/1) ... [2018-09-18 10:13:44,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10289462 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:13:44, skipping insertion in model container [2018-09-18 10:13:44,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 10:13:43" (1/1) ... [2018-09-18 10:13:44,023 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-18 10:13:44,731 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 10:13:44,750 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-18 10:13:44,932 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 10:13:45,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:13:45 WrapperNode [2018-09-18 10:13:45,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-18 10:13:45,012 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-18 10:13:45,013 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-18 10:13:45,013 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-18 10:13:45,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:13:45" (1/1) ... [2018-09-18 10:13:45,076 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:13:45" (1/1) ... [2018-09-18 10:13:45,196 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-18 10:13:45,196 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-18 10:13:45,196 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-18 10:13:45,197 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-18 10:13:45,430 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:13:45" (1/1) ... [2018-09-18 10:13:45,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:13:45" (1/1) ... [2018-09-18 10:13:45,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:13:45" (1/1) ... [2018-09-18 10:13:45,440 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:13:45" (1/1) ... [2018-09-18 10:13:45,522 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:13:45" (1/1) ... [2018-09-18 10:13:45,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:13:45" (1/1) ... [2018-09-18 10:13:45,578 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:13:45" (1/1) ... [2018-09-18 10:13:45,611 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-18 10:13:45,612 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-18 10:13:45,612 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-18 10:13:45,612 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-18 10:13:45,617 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:13:45" (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 [2018-09-18 10:13:45,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-18 10:13:45,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-18 10:13:45,685 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-18 10:13:45,685 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-18 10:13:45,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-18 10:13:45,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-18 10:13:45,686 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-18 10:13:45,686 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-18 10:13:50,504 INFO L356 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-18 10:13:50,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 10:13:50 BoogieIcfgContainer [2018-09-18 10:13:50,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-18 10:13:50,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-18 10:13:50,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-18 10:13:50,511 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-18 10:13:50,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 10:13:43" (1/3) ... [2018-09-18 10:13:50,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11afa5b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 10:13:50, skipping insertion in model container [2018-09-18 10:13:50,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:13:45" (2/3) ... [2018-09-18 10:13:50,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11afa5b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 10:13:50, skipping insertion in model container [2018-09-18 10:13:50,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 10:13:50" (3/3) ... [2018-09-18 10:13:50,516 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label20_true-unreach-call.c [2018-09-18 10:13:50,527 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-18 10:13:50,537 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-18 10:13:50,597 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-18 10:13:50,598 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-18 10:13:50,598 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-18 10:13:50,598 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-18 10:13:50,598 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-18 10:13:50,599 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-18 10:13:50,599 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-18 10:13:50,599 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-18 10:13:50,599 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-18 10:13:50,629 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-09-18 10:13:50,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-18 10:13:50,659 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:13:50,661 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] [2018-09-18 10:13:50,662 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:13:50,669 INFO L82 PathProgramCache]: Analyzing trace with hash -775720303, now seen corresponding path program 1 times [2018-09-18 10:13:50,672 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:13:50,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:13:50,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:13:50,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:13:50,734 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:13:51,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:13:51,671 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 10:13:51,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:13:51,882 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:13:51,883 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 10:13:51,883 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:13:51,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 10:13:51,904 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 10:13:51,905 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 10:13:51,907 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-09-18 10:13:54,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:13:54,212 INFO L93 Difference]: Finished difference Result 838 states and 1479 transitions. [2018-09-18 10:13:54,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 10:13:54,216 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 202 [2018-09-18 10:13:54,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:13:54,239 INFO L225 Difference]: With dead ends: 838 [2018-09-18 10:13:54,239 INFO L226 Difference]: Without dead ends: 524 [2018-09-18 10:13:54,247 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 [2018-09-18 10:13:54,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2018-09-18 10:13:54,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 522. [2018-09-18 10:13:54,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2018-09-18 10:13:54,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 890 transitions. [2018-09-18 10:13:54,340 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 890 transitions. Word has length 202 [2018-09-18 10:13:54,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:13:54,342 INFO L480 AbstractCegarLoop]: Abstraction has 522 states and 890 transitions. [2018-09-18 10:13:54,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 10:13:54,342 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 890 transitions. [2018-09-18 10:13:54,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-18 10:13:54,350 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:13:54,351 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] [2018-09-18 10:13:54,351 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:13:54,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1755738424, now seen corresponding path program 1 times [2018-09-18 10:13:54,352 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:13:54,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:13:54,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:13:54,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:13:54,354 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:13:54,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:13:54,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:13:54,705 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:13:54,706 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 10:13:54,706 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:13:54,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 10:13:54,708 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 10:13:54,708 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-18 10:13:54,709 INFO L87 Difference]: Start difference. First operand 522 states and 890 transitions. Second operand 6 states. [2018-09-18 10:13:58,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:13:58,896 INFO L93 Difference]: Finished difference Result 1581 states and 2759 transitions. [2018-09-18 10:13:58,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-18 10:13:58,907 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 212 [2018-09-18 10:13:58,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:13:58,920 INFO L225 Difference]: With dead ends: 1581 [2018-09-18 10:13:58,920 INFO L226 Difference]: Without dead ends: 1065 [2018-09-18 10:13:58,927 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 [2018-09-18 10:13:58,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2018-09-18 10:13:58,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1023. [2018-09-18 10:13:58,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1023 states. [2018-09-18 10:13:59,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1733 transitions. [2018-09-18 10:13:59,006 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1733 transitions. Word has length 212 [2018-09-18 10:13:59,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:13:59,006 INFO L480 AbstractCegarLoop]: Abstraction has 1023 states and 1733 transitions. [2018-09-18 10:13:59,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 10:13:59,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1733 transitions. [2018-09-18 10:13:59,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-09-18 10:13:59,013 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:13:59,013 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] [2018-09-18 10:13:59,014 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:13:59,015 INFO L82 PathProgramCache]: Analyzing trace with hash -548370667, now seen corresponding path program 1 times [2018-09-18 10:13:59,015 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:13:59,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:13:59,016 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:13:59,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:13:59,019 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:13:59,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:13:59,401 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:13:59,402 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:13:59,402 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 10:13:59,402 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:13:59,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 10:13:59,405 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 10:13:59,405 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 10:13:59,406 INFO L87 Difference]: Start difference. First operand 1023 states and 1733 transitions. Second operand 3 states. [2018-09-18 10:14:02,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:14:02,040 INFO L93 Difference]: Finished difference Result 2903 states and 5102 transitions. [2018-09-18 10:14:02,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 10:14:02,044 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 215 [2018-09-18 10:14:02,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:14:02,058 INFO L225 Difference]: With dead ends: 2903 [2018-09-18 10:14:02,058 INFO L226 Difference]: Without dead ends: 1886 [2018-09-18 10:14:02,063 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 [2018-09-18 10:14:02,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1886 states. [2018-09-18 10:14:02,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1886 to 1866. [2018-09-18 10:14:02,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1866 states. [2018-09-18 10:14:02,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 3136 transitions. [2018-09-18 10:14:02,129 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 3136 transitions. Word has length 215 [2018-09-18 10:14:02,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:14:02,130 INFO L480 AbstractCegarLoop]: Abstraction has 1866 states and 3136 transitions. [2018-09-18 10:14:02,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 10:14:02,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 3136 transitions. [2018-09-18 10:14:02,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-09-18 10:14:02,143 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:14:02,143 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-18 10:14:02,144 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:14:02,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1747135276, now seen corresponding path program 1 times [2018-09-18 10:14:02,144 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:14:02,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:14:02,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:14:02,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:14:02,146 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:14:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:14:02,618 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:14:02,618 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:14:02,619 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 [2018-09-18 10:14:02,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:14:02,637 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:14:02,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:14:02,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:14:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-18 10:14:03,152 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:14:03,392 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-18 10:14:03,415 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 10:14:03,415 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-18 10:14:03,416 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:14:03,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 10:14:03,416 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 10:14:03,417 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-18 10:14:03,417 INFO L87 Difference]: Start difference. First operand 1866 states and 3136 transitions. Second operand 3 states. [2018-09-18 10:14:05,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:14:05,601 INFO L93 Difference]: Finished difference Result 5475 states and 9460 transitions. [2018-09-18 10:14:05,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 10:14:05,606 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2018-09-18 10:14:05,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:14:05,630 INFO L225 Difference]: With dead ends: 5475 [2018-09-18 10:14:05,631 INFO L226 Difference]: Without dead ends: 3615 [2018-09-18 10:14:05,640 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 464 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-18 10:14:05,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3615 states. [2018-09-18 10:14:05,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3615 to 3613. [2018-09-18 10:14:05,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3613 states. [2018-09-18 10:14:05,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 5793 transitions. [2018-09-18 10:14:05,753 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 5793 transitions. Word has length 233 [2018-09-18 10:14:05,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:14:05,754 INFO L480 AbstractCegarLoop]: Abstraction has 3613 states and 5793 transitions. [2018-09-18 10:14:05,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 10:14:05,755 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 5793 transitions. [2018-09-18 10:14:05,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2018-09-18 10:14:05,772 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:14:05,772 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:14:05,773 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:14:05,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1944902010, now seen corresponding path program 1 times [2018-09-18 10:14:05,773 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:14:05,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:14:05,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:14:05,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:14:05,775 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:14:05,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:14:06,353 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 60 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:14:06,353 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:14:06,354 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 [2018-09-18 10:14:06,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:14:06,369 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:14:06,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:14:06,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:14:06,928 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-09-18 10:14:06,928 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:14:07,143 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-18 10:14:07,291 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 49 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 10:14:07,324 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:14:07,324 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-09-18 10:14:07,324 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:14:07,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 10:14:07,325 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 10:14:07,326 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-09-18 10:14:07,326 INFO L87 Difference]: Start difference. First operand 3613 states and 5793 transitions. Second operand 5 states. [2018-09-18 10:14:10,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:14:10,408 INFO L93 Difference]: Finished difference Result 11684 states and 19732 transitions. [2018-09-18 10:14:10,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 10:14:10,409 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 259 [2018-09-18 10:14:10,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:14:10,460 INFO L225 Difference]: With dead ends: 11684 [2018-09-18 10:14:10,460 INFO L226 Difference]: Without dead ends: 8077 [2018-09-18 10:14:10,484 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 515 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-09-18 10:14:10,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8077 states. [2018-09-18 10:14:10,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8077 to 7959. [2018-09-18 10:14:10,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7959 states. [2018-09-18 10:14:10,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7959 states to 7959 states and 12587 transitions. [2018-09-18 10:14:10,739 INFO L78 Accepts]: Start accepts. Automaton has 7959 states and 12587 transitions. Word has length 259 [2018-09-18 10:14:10,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:14:10,739 INFO L480 AbstractCegarLoop]: Abstraction has 7959 states and 12587 transitions. [2018-09-18 10:14:10,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 10:14:10,740 INFO L276 IsEmpty]: Start isEmpty. Operand 7959 states and 12587 transitions. [2018-09-18 10:14:10,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-09-18 10:14:10,780 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:14:10,781 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:14:10,781 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:14:10,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1659653317, now seen corresponding path program 1 times [2018-09-18 10:14:10,782 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:14:10,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:14:10,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:14:10,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:14:10,784 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:14:10,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:14:11,563 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:14:11,563 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:14:11,564 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 [2018-09-18 10:14:11,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:14:11,580 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:14:11,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:14:11,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:14:11,872 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:14:11,872 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:14:12,439 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:14:12,473 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:14:12,473 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 [2018-09-18 10:14:12,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:14:12,506 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:14:12,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:14:12,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:14:13,309 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 59 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:14:13,309 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:14:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:14:13,635 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:14:13,635 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 5] total 9 [2018-09-18 10:14:13,635 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:14:13,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 10:14:13,638 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 10:14:13,638 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-09-18 10:14:13,638 INFO L87 Difference]: Start difference. First operand 7959 states and 12587 transitions. Second operand 6 states. [2018-09-18 10:14:17,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:14:17,523 INFO L93 Difference]: Finished difference Result 27705 states and 50612 transitions. [2018-09-18 10:14:17,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-18 10:14:17,526 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 268 [2018-09-18 10:14:17,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:14:17,661 INFO L225 Difference]: With dead ends: 27705 [2018-09-18 10:14:17,661 INFO L226 Difference]: Without dead ends: 19752 [2018-09-18 10:14:17,738 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1082 GetRequests, 1068 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-09-18 10:14:17,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19752 states. [2018-09-18 10:14:18,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19752 to 19229. [2018-09-18 10:14:18,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19229 states. [2018-09-18 10:14:18,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19229 states to 19229 states and 29892 transitions. [2018-09-18 10:14:18,463 INFO L78 Accepts]: Start accepts. Automaton has 19229 states and 29892 transitions. Word has length 268 [2018-09-18 10:14:18,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:14:18,464 INFO L480 AbstractCegarLoop]: Abstraction has 19229 states and 29892 transitions. [2018-09-18 10:14:18,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 10:14:18,464 INFO L276 IsEmpty]: Start isEmpty. Operand 19229 states and 29892 transitions. [2018-09-18 10:14:18,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2018-09-18 10:14:18,580 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:14:18,580 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 10:14:18,581 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:14:18,581 INFO L82 PathProgramCache]: Analyzing trace with hash 2135564915, now seen corresponding path program 1 times [2018-09-18 10:14:18,581 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:14:18,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:14:18,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:14:18,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:14:18,582 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:14:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:14:18,903 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 10:14:19,348 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:14:19,349 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:14:19,349 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 10:14:19,349 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:14:19,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 10:14:19,350 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 10:14:19,350 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-18 10:14:19,351 INFO L87 Difference]: Start difference. First operand 19229 states and 29892 transitions. Second operand 6 states. [2018-09-18 10:14:23,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:14:23,049 INFO L93 Difference]: Finished difference Result 47038 states and 77704 transitions. [2018-09-18 10:14:23,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 10:14:23,050 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 289 [2018-09-18 10:14:23,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:14:23,210 INFO L225 Difference]: With dead ends: 47038 [2018-09-18 10:14:23,210 INFO L226 Difference]: Without dead ends: 27825 [2018-09-18 10:14:23,265 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-18 10:14:23,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27825 states. [2018-09-18 10:14:23,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27825 to 27486. [2018-09-18 10:14:23,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27486 states. [2018-09-18 10:14:24,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27486 states to 27486 states and 38146 transitions. [2018-09-18 10:14:24,477 INFO L78 Accepts]: Start accepts. Automaton has 27486 states and 38146 transitions. Word has length 289 [2018-09-18 10:14:24,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:14:24,477 INFO L480 AbstractCegarLoop]: Abstraction has 27486 states and 38146 transitions. [2018-09-18 10:14:24,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 10:14:24,478 INFO L276 IsEmpty]: Start isEmpty. Operand 27486 states and 38146 transitions. [2018-09-18 10:14:24,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2018-09-18 10:14:24,551 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:14:24,551 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2018-09-18 10:14:24,553 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:14:24,553 INFO L82 PathProgramCache]: Analyzing trace with hash -268886066, now seen corresponding path program 1 times [2018-09-18 10:14:24,553 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:14:24,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:14:24,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:14:24,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:14:24,555 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:14:24,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:14:24,924 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-09-18 10:14:25,312 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-09-18 10:14:26,184 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 100 proven. 92 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-18 10:14:26,185 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:14:26,185 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 [2018-09-18 10:14:26,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:14:26,193 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:14:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:14:26,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:14:26,843 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 100 proven. 4 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2018-09-18 10:14:26,843 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:14:27,245 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2018-09-18 10:14:27,266 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:14:27,266 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 5] total 14 [2018-09-18 10:14:27,267 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:14:27,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 10:14:27,267 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 10:14:27,267 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2018-09-18 10:14:27,268 INFO L87 Difference]: Start difference. First operand 27486 states and 38146 transitions. Second operand 5 states. [2018-09-18 10:14:30,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:14:30,346 INFO L93 Difference]: Finished difference Result 80531 states and 112695 transitions. [2018-09-18 10:14:30,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-18 10:14:30,347 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 309 [2018-09-18 10:14:30,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:14:30,549 INFO L225 Difference]: With dead ends: 80531 [2018-09-18 10:14:30,549 INFO L226 Difference]: Without dead ends: 53061 [2018-09-18 10:14:30,628 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 631 GetRequests, 610 SyntacticMatches, 8 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2018-09-18 10:14:30,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53061 states. [2018-09-18 10:14:31,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53061 to 51130. [2018-09-18 10:14:31,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51130 states. [2018-09-18 10:14:31,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51130 states to 51130 states and 69185 transitions. [2018-09-18 10:14:31,957 INFO L78 Accepts]: Start accepts. Automaton has 51130 states and 69185 transitions. Word has length 309 [2018-09-18 10:14:31,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:14:31,958 INFO L480 AbstractCegarLoop]: Abstraction has 51130 states and 69185 transitions. [2018-09-18 10:14:31,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 10:14:31,958 INFO L276 IsEmpty]: Start isEmpty. Operand 51130 states and 69185 transitions. [2018-09-18 10:14:32,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-09-18 10:14:32,056 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:14:32,056 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-18 10:14:32,056 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:14:32,057 INFO L82 PathProgramCache]: Analyzing trace with hash 2112084087, now seen corresponding path program 1 times [2018-09-18 10:14:32,057 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:14:32,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:14:32,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:14:32,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:14:32,058 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:14:32,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:14:32,620 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-18 10:14:32,697 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 132 proven. 34 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-18 10:14:32,698 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:14:32,698 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 [2018-09-18 10:14:32,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:14:32,707 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:14:32,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:14:32,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:14:33,104 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 151 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-18 10:14:33,104 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:14:33,433 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 117 proven. 64 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 10:14:33,455 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:14:33,456 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 8 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 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:14:33,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:14:33,476 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:14:34,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:14:34,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:14:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 151 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-18 10:14:34,165 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:14:34,573 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 117 proven. 64 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 10:14:34,577 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:14:34,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8, 8, 8] total 24 [2018-09-18 10:14:34,578 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:14:34,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-18 10:14:34,579 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-18 10:14:34,579 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2018-09-18 10:14:34,580 INFO L87 Difference]: Start difference. First operand 51130 states and 69185 transitions. Second operand 12 states. [2018-09-18 10:14:36,036 WARN L178 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-09-18 10:14:55,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:14:55,394 INFO L93 Difference]: Finished difference Result 181330 states and 288847 transitions. [2018-09-18 10:14:55,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-18 10:14:55,395 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 318 [2018-09-18 10:14:55,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:14:56,335 INFO L225 Difference]: With dead ends: 181330 [2018-09-18 10:14:56,335 INFO L226 Difference]: Without dead ends: 130214 [2018-09-18 10:14:56,610 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1446 GetRequests, 1337 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4211 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1645, Invalid=10565, Unknown=0, NotChecked=0, Total=12210 [2018-09-18 10:14:56,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130214 states. [2018-09-18 10:15:00,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130214 to 122137. [2018-09-18 10:15:00,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122137 states. [2018-09-18 10:15:00,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122137 states to 122137 states and 156401 transitions. [2018-09-18 10:15:00,747 INFO L78 Accepts]: Start accepts. Automaton has 122137 states and 156401 transitions. Word has length 318 [2018-09-18 10:15:00,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:15:00,748 INFO L480 AbstractCegarLoop]: Abstraction has 122137 states and 156401 transitions. [2018-09-18 10:15:00,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-18 10:15:00,748 INFO L276 IsEmpty]: Start isEmpty. Operand 122137 states and 156401 transitions. [2018-09-18 10:15:00,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2018-09-18 10:15:00,927 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:15:00,928 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 10:15:00,928 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:15:00,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1689599594, now seen corresponding path program 1 times [2018-09-18 10:15:00,929 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:15:00,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:15:00,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:00,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:15:00,930 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:15:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:01,501 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 148 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-18 10:15:01,502 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:15:01,502 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:15:01,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:01,518 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:15:01,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:01,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:15:01,793 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 103 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-09-18 10:15:01,793 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:15:01,905 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 148 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-18 10:15:02,718 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:15:02,719 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 10 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 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:15:02,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:02,736 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:15:03,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:03,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:15:03,955 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 84 proven. 21 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-09-18 10:15:03,955 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:15:04,325 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 148 proven. 37 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 10:15:04,328 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:15:04,329 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 8] total 12 [2018-09-18 10:15:04,329 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:15:04,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 10:15:04,329 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 10:15:04,330 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-09-18 10:15:04,330 INFO L87 Difference]: Start difference. First operand 122137 states and 156401 transitions. Second operand 6 states. [2018-09-18 10:15:06,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:15:06,429 INFO L93 Difference]: Finished difference Result 216304 states and 276168 transitions. [2018-09-18 10:15:06,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-18 10:15:06,429 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 336 [2018-09-18 10:15:06,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:15:06,819 INFO L225 Difference]: With dead ends: 216304 [2018-09-18 10:15:06,819 INFO L226 Difference]: Without dead ends: 114963 [2018-09-18 10:15:06,974 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1350 GetRequests, 1334 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2018-09-18 10:15:07,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114963 states. [2018-09-18 10:15:10,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114963 to 114680. [2018-09-18 10:15:10,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114680 states. [2018-09-18 10:15:10,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114680 states to 114680 states and 144377 transitions. [2018-09-18 10:15:10,354 INFO L78 Accepts]: Start accepts. Automaton has 114680 states and 144377 transitions. Word has length 336 [2018-09-18 10:15:10,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:15:10,354 INFO L480 AbstractCegarLoop]: Abstraction has 114680 states and 144377 transitions. [2018-09-18 10:15:10,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 10:15:10,355 INFO L276 IsEmpty]: Start isEmpty. Operand 114680 states and 144377 transitions. [2018-09-18 10:15:10,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2018-09-18 10:15:10,459 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:15:10,460 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:15:10,460 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:15:10,460 INFO L82 PathProgramCache]: Analyzing trace with hash 973085746, now seen corresponding path program 1 times [2018-09-18 10:15:10,460 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:15:10,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:15:10,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:10,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:15:10,461 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:15:10,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:10,931 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 190 proven. 70 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-09-18 10:15:10,932 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:15:10,932 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 [2018-09-18 10:15:10,940 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:10,941 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:15:11,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:11,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:15:11,457 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 228 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2018-09-18 10:15:11,457 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:15:11,765 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 190 proven. 70 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-09-18 10:15:11,789 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:15:11,789 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 12 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 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:15:11,805 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:11,805 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:15:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:12,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:15:12,681 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 258 proven. 44 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-18 10:15:12,681 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:15:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 215 proven. 100 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-18 10:15:13,124 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:15:13,125 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 11, 8] total 26 [2018-09-18 10:15:13,125 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:15:13,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-18 10:15:13,126 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-18 10:15:13,126 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2018-09-18 10:15:13,126 INFO L87 Difference]: Start difference. First operand 114680 states and 144377 transitions. Second operand 10 states. [2018-09-18 10:15:21,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:15:21,054 INFO L93 Difference]: Finished difference Result 219011 states and 288187 transitions. [2018-09-18 10:15:21,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-18 10:15:21,055 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 376 [2018-09-18 10:15:21,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:15:21,474 INFO L225 Difference]: With dead ends: 219011 [2018-09-18 10:15:21,475 INFO L226 Difference]: Without dead ends: 104965 [2018-09-18 10:15:21,764 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1536 GetRequests, 1498 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=249, Invalid=1311, Unknown=0, NotChecked=0, Total=1560 [2018-09-18 10:15:21,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104965 states. [2018-09-18 10:15:24,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104965 to 101667. [2018-09-18 10:15:24,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101667 states. [2018-09-18 10:15:24,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101667 states to 101667 states and 117483 transitions. [2018-09-18 10:15:24,685 INFO L78 Accepts]: Start accepts. Automaton has 101667 states and 117483 transitions. Word has length 376 [2018-09-18 10:15:24,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:15:24,685 INFO L480 AbstractCegarLoop]: Abstraction has 101667 states and 117483 transitions. [2018-09-18 10:15:24,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-18 10:15:24,685 INFO L276 IsEmpty]: Start isEmpty. Operand 101667 states and 117483 transitions. [2018-09-18 10:15:24,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2018-09-18 10:15:24,752 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:15:24,753 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-18 10:15:24,753 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:15:24,753 INFO L82 PathProgramCache]: Analyzing trace with hash 42904784, now seen corresponding path program 1 times [2018-09-18 10:15:24,753 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:15:24,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:15:24,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:24,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:15:24,754 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:15:24,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:25,167 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 175 proven. 8 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2018-09-18 10:15:25,168 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:15:25,168 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:15:25,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:25,184 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:15:25,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:25,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:15:25,589 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2018-09-18 10:15:25,590 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:15:25,819 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 163 proven. 75 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-09-18 10:15:25,840 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:15:25,841 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 11 [2018-09-18 10:15:25,841 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:15:25,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 10:15:25,842 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 10:15:25,842 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-09-18 10:15:25,842 INFO L87 Difference]: Start difference. First operand 101667 states and 117483 transitions. Second operand 6 states. [2018-09-18 10:15:29,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:15:29,397 INFO L93 Difference]: Finished difference Result 186471 states and 218144 transitions. [2018-09-18 10:15:29,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-18 10:15:29,398 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 378 [2018-09-18 10:15:29,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:15:29,717 INFO L225 Difference]: With dead ends: 186471 [2018-09-18 10:15:29,717 INFO L226 Difference]: Without dead ends: 103314 [2018-09-18 10:15:29,854 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 766 GetRequests, 748 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2018-09-18 10:15:29,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103314 states. [2018-09-18 10:15:31,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103314 to 102168. [2018-09-18 10:15:31,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102168 states. [2018-09-18 10:15:31,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102168 states to 102168 states and 117828 transitions. [2018-09-18 10:15:31,542 INFO L78 Accepts]: Start accepts. Automaton has 102168 states and 117828 transitions. Word has length 378 [2018-09-18 10:15:31,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:15:31,543 INFO L480 AbstractCegarLoop]: Abstraction has 102168 states and 117828 transitions. [2018-09-18 10:15:31,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 10:15:31,543 INFO L276 IsEmpty]: Start isEmpty. Operand 102168 states and 117828 transitions. [2018-09-18 10:15:31,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2018-09-18 10:15:31,605 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:15:31,605 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-18 10:15:31,605 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:15:31,605 INFO L82 PathProgramCache]: Analyzing trace with hash 528733795, now seen corresponding path program 1 times [2018-09-18 10:15:31,605 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:15:31,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:15:31,606 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:31,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:15:31,607 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:15:31,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:34,822 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 167 proven. 79 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-09-18 10:15:34,822 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:15:34,822 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 [2018-09-18 10:15:34,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:34,831 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:15:35,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:35,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:15:35,265 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2018-09-18 10:15:35,265 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:15:35,496 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 167 proven. 79 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-09-18 10:15:35,518 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:15:35,519 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-18 10:15:35,519 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:15:35,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 10:15:35,520 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 10:15:35,520 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-09-18 10:15:35,521 INFO L87 Difference]: Start difference. First operand 102168 states and 117828 transitions. Second operand 5 states. [2018-09-18 10:15:38,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:15:38,423 INFO L93 Difference]: Finished difference Result 197822 states and 228242 transitions. [2018-09-18 10:15:38,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-18 10:15:38,424 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 380 [2018-09-18 10:15:38,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:15:38,667 INFO L225 Difference]: With dead ends: 197822 [2018-09-18 10:15:38,667 INFO L226 Difference]: Without dead ends: 99912 [2018-09-18 10:15:38,796 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 767 GetRequests, 755 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-09-18 10:15:38,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99912 states. [2018-09-18 10:15:40,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99912 to 98387. [2018-09-18 10:15:40,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98387 states. [2018-09-18 10:15:40,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98387 states to 98387 states and 112433 transitions. [2018-09-18 10:15:40,601 INFO L78 Accepts]: Start accepts. Automaton has 98387 states and 112433 transitions. Word has length 380 [2018-09-18 10:15:40,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:15:40,601 INFO L480 AbstractCegarLoop]: Abstraction has 98387 states and 112433 transitions. [2018-09-18 10:15:40,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 10:15:40,602 INFO L276 IsEmpty]: Start isEmpty. Operand 98387 states and 112433 transitions. [2018-09-18 10:15:40,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2018-09-18 10:15:40,671 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:15:40,671 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, 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] [2018-09-18 10:15:40,671 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:15:40,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1663644183, now seen corresponding path program 1 times [2018-09-18 10:15:40,672 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:15:40,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:15:40,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:40,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:15:40,673 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:15:40,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:41,171 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 265 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:15:41,171 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:15:41,171 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:15:41,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:41,179 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:15:41,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:41,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:15:41,478 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-09-18 10:15:41,478 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:15:41,593 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-09-18 10:15:41,616 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 10:15:41,616 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-18 10:15:41,616 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:15:41,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 10:15:41,617 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 10:15:41,617 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-18 10:15:41,618 INFO L87 Difference]: Start difference. First operand 98387 states and 112433 transitions. Second operand 3 states. [2018-09-18 10:15:43,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:15:43,978 INFO L93 Difference]: Finished difference Result 155487 states and 177956 transitions. [2018-09-18 10:15:43,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 10:15:43,978 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 388 [2018-09-18 10:15:43,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:15:44,135 INFO L225 Difference]: With dead ends: 155487 [2018-09-18 10:15:44,135 INFO L226 Difference]: Without dead ends: 74660 [2018-09-18 10:15:44,215 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 781 GetRequests, 776 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-18 10:15:44,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74660 states. [2018-09-18 10:15:45,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74660 to 74564. [2018-09-18 10:15:45,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74564 states. [2018-09-18 10:15:45,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74564 states to 74564 states and 84311 transitions. [2018-09-18 10:15:45,304 INFO L78 Accepts]: Start accepts. Automaton has 74564 states and 84311 transitions. Word has length 388 [2018-09-18 10:15:45,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:15:45,305 INFO L480 AbstractCegarLoop]: Abstraction has 74564 states and 84311 transitions. [2018-09-18 10:15:45,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 10:15:45,305 INFO L276 IsEmpty]: Start isEmpty. Operand 74564 states and 84311 transitions. [2018-09-18 10:15:45,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2018-09-18 10:15:45,395 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:15:45,396 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:15:45,396 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:15:45,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1445721117, now seen corresponding path program 1 times [2018-09-18 10:15:45,396 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:15:45,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:15:45,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:45,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:15:45,398 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:15:45,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:46,056 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 236 proven. 34 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-18 10:15:46,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:15:46,056 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 [2018-09-18 10:15:46,072 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:46,072 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:15:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:46,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:15:46,432 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 268 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-18 10:15:46,432 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:15:46,571 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 236 proven. 34 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-18 10:15:46,593 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:15:46,593 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 [2018-09-18 10:15:46,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:46,610 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:15:47,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:47,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:15:47,799 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 268 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-18 10:15:47,800 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:15:47,991 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 241 proven. 34 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-09-18 10:15:47,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:15:47,994 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 6, 7] total 16 [2018-09-18 10:15:47,994 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:15:47,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 10:15:47,996 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 10:15:47,996 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2018-09-18 10:15:47,996 INFO L87 Difference]: Start difference. First operand 74564 states and 84311 transitions. Second operand 6 states. [2018-09-18 10:15:51,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:15:51,379 INFO L93 Difference]: Finished difference Result 237901 states and 282863 transitions. [2018-09-18 10:15:51,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-18 10:15:51,380 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 407 [2018-09-18 10:15:51,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:15:51,918 INFO L225 Difference]: With dead ends: 237901 [2018-09-18 10:15:51,918 INFO L226 Difference]: Without dead ends: 172920 [2018-09-18 10:15:52,087 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1638 GetRequests, 1619 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2018-09-18 10:15:52,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172920 states. [2018-09-18 10:15:55,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172920 to 169290. [2018-09-18 10:15:55,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169290 states. [2018-09-18 10:15:55,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169290 states to 169290 states and 193444 transitions. [2018-09-18 10:15:55,889 INFO L78 Accepts]: Start accepts. Automaton has 169290 states and 193444 transitions. Word has length 407 [2018-09-18 10:15:55,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:15:55,889 INFO L480 AbstractCegarLoop]: Abstraction has 169290 states and 193444 transitions. [2018-09-18 10:15:55,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 10:15:55,889 INFO L276 IsEmpty]: Start isEmpty. Operand 169290 states and 193444 transitions. [2018-09-18 10:15:56,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2018-09-18 10:15:56,067 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:15:56,067 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:15:56,067 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:15:56,068 INFO L82 PathProgramCache]: Analyzing trace with hash -522676943, now seen corresponding path program 1 times [2018-09-18 10:15:56,068 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:15:56,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:15:56,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:56,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:15:56,069 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:15:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:57,121 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 289 proven. 70 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2018-09-18 10:15:57,121 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:15:57,121 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:15:57,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:57,128 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:15:57,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:57,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:15:57,708 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 436 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-09-18 10:15:57,709 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:15:58,051 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 335 proven. 100 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-09-18 10:15:58,073 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:15:58,073 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 19 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 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:15:58,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:58,090 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:15:58,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:58,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:15:59,813 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 192 proven. 2 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2018-09-18 10:15:59,813 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:15:59,987 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-09-18 10:16:01,796 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 238 proven. 122 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2018-09-18 10:16:01,799 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:16:01,799 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8, 10, 11] total 33 [2018-09-18 10:16:01,799 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:16:01,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-18 10:16:01,800 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-18 10:16:01,801 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2018-09-18 10:16:01,801 INFO L87 Difference]: Start difference. First operand 169290 states and 193444 transitions. Second operand 13 states. [2018-09-18 10:16:12,022 WARN L178 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-09-18 10:16:20,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:16:20,152 INFO L93 Difference]: Finished difference Result 343749 states and 432135 transitions. [2018-09-18 10:16:20,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-18 10:16:20,153 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 437 [2018-09-18 10:16:20,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:16:21,581 INFO L225 Difference]: With dead ends: 343749 [2018-09-18 10:16:21,581 INFO L226 Difference]: Without dead ends: 198356 [2018-09-18 10:16:21,785 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1852 GetRequests, 1764 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2398 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1169, Invalid=6841, Unknown=0, NotChecked=0, Total=8010 [2018-09-18 10:16:21,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198356 states. [2018-09-18 10:16:26,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198356 to 183048. [2018-09-18 10:16:26,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183048 states. [2018-09-18 10:16:26,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183048 states to 183048 states and 207840 transitions. [2018-09-18 10:16:26,852 INFO L78 Accepts]: Start accepts. Automaton has 183048 states and 207840 transitions. Word has length 437 [2018-09-18 10:16:26,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:16:26,852 INFO L480 AbstractCegarLoop]: Abstraction has 183048 states and 207840 transitions. [2018-09-18 10:16:26,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-18 10:16:26,852 INFO L276 IsEmpty]: Start isEmpty. Operand 183048 states and 207840 transitions. [2018-09-18 10:16:27,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2018-09-18 10:16:27,025 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:16:27,025 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:16:27,026 INFO L423 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:16:27,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1015664134, now seen corresponding path program 1 times [2018-09-18 10:16:27,026 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:16:27,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:16:27,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:16:27,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:16:27,027 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:16:27,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:16:27,513 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 272 proven. 133 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2018-09-18 10:16:27,513 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:16:27,513 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:16:27,521 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:16:27,521 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:16:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:16:27,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:16:28,013 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 481 proven. 4 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2018-09-18 10:16:28,013 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:16:28,749 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 402 proven. 66 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2018-09-18 10:16:28,771 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:16:28,772 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 21 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 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:16:28,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:16:28,788 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:16:29,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:16:29,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:16:29,651 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 481 proven. 4 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2018-09-18 10:16:29,652 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:16:29,867 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 402 proven. 66 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2018-09-18 10:16:29,872 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:16:29,872 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-09-18 10:16:29,872 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:16:29,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 10:16:29,873 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 10:16:29,873 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-09-18 10:16:29,873 INFO L87 Difference]: Start difference. First operand 183048 states and 207840 transitions. Second operand 9 states. [2018-09-18 10:16:35,853 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-09-18 10:16:54,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:16:54,306 INFO L93 Difference]: Finished difference Result 666569 states and 824946 transitions. [2018-09-18 10:16:54,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-18 10:16:54,306 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 454 [2018-09-18 10:16:54,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:16:56,296 INFO L225 Difference]: With dead ends: 666569 [2018-09-18 10:16:56,296 INFO L226 Difference]: Without dead ends: 447453 [2018-09-18 10:16:56,888 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1886 GetRequests, 1835 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=439, Invalid=2011, Unknown=0, NotChecked=0, Total=2450 [2018-09-18 10:16:57,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447453 states. [2018-09-18 10:17:13,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447453 to 415915. [2018-09-18 10:17:13,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415915 states. [2018-09-18 10:17:14,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415915 states to 415915 states and 458865 transitions. [2018-09-18 10:17:14,131 INFO L78 Accepts]: Start accepts. Automaton has 415915 states and 458865 transitions. Word has length 454 [2018-09-18 10:17:14,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:17:14,131 INFO L480 AbstractCegarLoop]: Abstraction has 415915 states and 458865 transitions. [2018-09-18 10:17:14,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 10:17:14,132 INFO L276 IsEmpty]: Start isEmpty. Operand 415915 states and 458865 transitions. [2018-09-18 10:17:14,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2018-09-18 10:17:14,532 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:17:14,532 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:17:14,532 INFO L423 AbstractCegarLoop]: === Iteration 18 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:17:14,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1776864303, now seen corresponding path program 1 times [2018-09-18 10:17:14,533 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:17:14,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:14,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:14,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:14,534 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:17:14,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:15,113 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 380 proven. 105 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-18 10:17:15,114 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:17:15,114 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:17:15,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:15,123 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:17:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:15,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:17:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 399 proven. 2 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-09-18 10:17:15,591 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:17:17,392 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 337 proven. 34 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2018-09-18 10:17:17,415 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:17:17,415 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 23 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 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:17:17,432 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:17,432 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Received shutdown request... [2018-09-18 10:17:18,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:18,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:17:18,149 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-18 10:17:18,350 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:17:18,351 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-18 10:17:18,357 WARN L206 ceAbstractionStarter]: Timeout [2018-09-18 10:17:18,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.09 10:17:18 BoogieIcfgContainer [2018-09-18 10:17:18,357 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-18 10:17:18,358 INFO L168 Benchmark]: Toolchain (without parser) took 214367.82 ms. Allocated memory was 1.5 GB in the beginning and 5.6 GB in the end (delta: 4.1 GB). Free memory was 1.4 GB in the beginning and 3.5 GB in the end (delta: -2.1 GB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2018-09-18 10:17:18,359 INFO L168 Benchmark]: CDTParser took 0.25 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. [2018-09-18 10:17:18,359 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1012.27 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: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-09-18 10:17:18,360 INFO L168 Benchmark]: Boogie Procedure Inliner took 183.47 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. [2018-09-18 10:17:18,361 INFO L168 Benchmark]: Boogie Preprocessor took 415.53 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 791.7 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -901.4 MB). Peak memory consumption was 48.4 MB. Max. memory is 7.1 GB. [2018-09-18 10:17:18,362 INFO L168 Benchmark]: RCFGBuilder took 4893.55 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 260.0 MB). Peak memory consumption was 260.0 MB. Max. memory is 7.1 GB. [2018-09-18 10:17:18,362 INFO L168 Benchmark]: TraceAbstraction took 207850.57 ms. Allocated memory was 2.3 GB in the beginning and 5.6 GB in the end (delta: 3.3 GB). Free memory was 1.9 GB in the beginning and 3.5 GB in the end (delta: -1.5 GB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-09-18 10:17:18,369 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 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 1012.27 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: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 183.47 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 415.53 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 791.7 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -901.4 MB). Peak memory consumption was 48.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4893.55 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 260.0 MB). Peak memory consumption was 260.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 207850.57 ms. Allocated memory was 2.3 GB in the beginning and 5.6 GB in the end (delta: 3.3 GB). Free memory was 1.9 GB in the beginning and 3.5 GB in the end (delta: -1.5 GB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1620]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1620). Cancelled while BasicCegarLoop was analyzing trace of length 463 with TraceHistMax 5, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 15 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 207.7s OverallTime, 18 OverallIterations, 6 TraceHistogramMax, 120.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4590 SDtfs, 24149 SDslu, 6037 SDs, 0 SdLazy, 45053 SolverSat, 9496 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 60.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14761 GetRequests, 14332 SyntacticMatches, 33 SemanticMatches, 396 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7873 ImplicationChecksByTransitivity, 17.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=415915occurred in iteration=17, 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: 44.9s AutomataMinimizationTime, 17 MinimizatonAttempts, 67878 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.3s SsaConstructionTime, 6.8s SatisfiabilityAnalysisTime, 22.2s InterpolantComputationTime, 12600 NumberOfCodeBlocks, 12600 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 19682 ConstructedInterpolants, 0 QuantifiedInterpolants, 18315687 SizeOfPredicates, 99 NumberOfNonLiveVariables, 27290 ConjunctsInSsa, 335 ConjunctsInUnsatCore, 57 InterpolantComputations, 12 PerfectInterpolantSequences, 12545/14160 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_label20_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-18_10-17-18-384.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label20_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-18_10-17-18-384.csv Completed graceful shutdown