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_label21_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-69f5bdd-m [2018-09-18 10:13:47,603 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-18 10:13:47,605 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-18 10:13:47,624 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-18 10:13:47,624 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-18 10:13:47,626 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-18 10:13:47,627 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-18 10:13:47,632 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-18 10:13:47,634 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-18 10:13:47,635 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-18 10:13:47,636 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-18 10:13:47,638 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-18 10:13:47,639 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-18 10:13:47,642 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-18 10:13:47,649 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-18 10:13:47,652 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-18 10:13:47,653 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-18 10:13:47,654 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-18 10:13:47,662 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-18 10:13:47,664 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-18 10:13:47,665 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-18 10:13:47,666 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-18 10:13:47,670 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-18 10:13:47,670 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-18 10:13:47,670 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-18 10:13:47,671 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-18 10:13:47,673 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-18 10:13:47,673 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-18 10:13:47,674 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-18 10:13:47,677 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-18 10:13:47,677 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-18 10:13:47,678 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-18 10:13:47,678 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-18 10:13:47,678 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-18 10:13:47,679 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-18 10:13:47,681 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-18 10:13:47,682 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 10:13:47,703 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-18 10:13:47,704 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-18 10:13:47,705 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-18 10:13:47,705 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-18 10:13:47,705 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-18 10:13:47,705 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-18 10:13:47,706 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-18 10:13:47,706 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-18 10:13:47,706 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-18 10:13:47,706 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-18 10:13:47,706 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-09-18 10:13:47,706 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-18 10:13:47,707 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-18 10:13:47,707 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-18 10:13:47,708 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-18 10:13:47,708 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-18 10:13:47,708 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-18 10:13:47,708 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-18 10:13:47,708 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-18 10:13:47,708 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-18 10:13:47,709 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-18 10:13:47,709 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-18 10:13:47,709 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-18 10:13:47,709 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-18 10:13:47,709 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-18 10:13:47,710 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-18 10:13:47,710 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-18 10:13:47,710 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-18 10:13:47,710 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-18 10:13:47,710 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-18 10:13:47,711 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-18 10:13:47,711 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-18 10:13:47,711 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-18 10:13:47,711 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-18 10:13:47,764 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-18 10:13:47,778 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-18 10:13:47,781 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-18 10:13:47,782 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-18 10:13:47,783 INFO L276 PluginConnector]: CDTParser initialized [2018-09-18 10:13:47,783 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label21_true-unreach-call.c [2018-09-18 10:13:48,134 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c33b82927/16854582af054d3181198f17de8ce76c/FLAG9bdb0fa64 [2018-09-18 10:13:48,481 INFO L277 CDTParser]: Found 1 translation units. [2018-09-18 10:13:48,482 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label21_true-unreach-call.c [2018-09-18 10:13:48,505 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c33b82927/16854582af054d3181198f17de8ce76c/FLAG9bdb0fa64 [2018-09-18 10:13:48,530 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c33b82927/16854582af054d3181198f17de8ce76c [2018-09-18 10:13:48,542 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-18 10:13:48,545 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-18 10:13:48,547 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-18 10:13:48,547 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-18 10:13:48,556 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-18 10:13:48,557 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 10:13:48" (1/1) ... [2018-09-18 10:13:48,561 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c79c81d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:13:48, skipping insertion in model container [2018-09-18 10:13:48,561 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 10:13:48" (1/1) ... [2018-09-18 10:13:48,574 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-18 10:13:49,352 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 10:13:49,372 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-18 10:13:49,616 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 10:13:49,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:13:49 WrapperNode [2018-09-18 10:13:49,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-18 10:13:49,683 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-18 10:13:49,683 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-18 10:13:49,684 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-18 10:13:49,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:13:49" (1/1) ... [2018-09-18 10:13:49,735 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:13:49" (1/1) ... [2018-09-18 10:13:49,838 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-18 10:13:49,839 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-18 10:13:49,839 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-18 10:13:49,839 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-18 10:13:50,121 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:13:49" (1/1) ... [2018-09-18 10:13:50,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:13:49" (1/1) ... [2018-09-18 10:13:50,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:13:49" (1/1) ... [2018-09-18 10:13:50,128 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:13:49" (1/1) ... [2018-09-18 10:13:50,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:13:49" (1/1) ... [2018-09-18 10:13:50,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:13:49" (1/1) ... [2018-09-18 10:13:50,239 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:13:49" (1/1) ... [2018-09-18 10:13:50,249 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-18 10:13:50,250 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-18 10:13:50,250 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-18 10:13:50,251 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-18 10:13:50,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:13:49" (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 10:13:50,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-18 10:13:50,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-18 10:13:50,330 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-18 10:13:50,331 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-18 10:13:50,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-18 10:13:50,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-18 10:13:50,331 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-18 10:13:50,331 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-18 10:13:54,977 INFO L356 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-18 10:13:54,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 10:13:54 BoogieIcfgContainer [2018-09-18 10:13:54,978 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-18 10:13:54,979 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-18 10:13:54,979 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-18 10:13:54,983 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-18 10:13:54,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 10:13:48" (1/3) ... [2018-09-18 10:13:54,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2578ed1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 10:13:54, skipping insertion in model container [2018-09-18 10:13:54,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:13:49" (2/3) ... [2018-09-18 10:13:54,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2578ed1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 10:13:54, skipping insertion in model container [2018-09-18 10:13:54,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 10:13:54" (3/3) ... [2018-09-18 10:13:54,987 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label21_true-unreach-call.c [2018-09-18 10:13:54,997 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-18 10:13:55,006 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-18 10:13:55,066 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-18 10:13:55,067 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-18 10:13:55,068 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-18 10:13:55,068 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-18 10:13:55,068 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-18 10:13:55,068 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-18 10:13:55,068 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-18 10:13:55,068 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-18 10:13:55,068 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-18 10:13:55,106 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-09-18 10:13:55,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-09-18 10:13:55,131 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:13:55,132 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:13:55,133 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:13:55,139 INFO L82 PathProgramCache]: Analyzing trace with hash 79824004, now seen corresponding path program 1 times [2018-09-18 10:13:55,142 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:13:55,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:13:55,200 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:13:55,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:13:55,201 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:13:55,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:13:56,090 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 10:13:56,286 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 10:13:56,288 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:13:56,289 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 10:13:56,289 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:13:56,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 10:13:56,316 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 10:13:56,317 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 10:13:56,320 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-09-18 10:13:58,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:13:58,127 INFO L93 Difference]: Finished difference Result 848 states and 1491 transitions. [2018-09-18 10:13:58,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 10:13:58,129 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 209 [2018-09-18 10:13:58,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:13:58,151 INFO L225 Difference]: With dead ends: 848 [2018-09-18 10:13:58,152 INFO L226 Difference]: Without dead ends: 534 [2018-09-18 10:13:58,165 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 10:13:58,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2018-09-18 10:13:58,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 532. [2018-09-18 10:13:58,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 532 states. [2018-09-18 10:13:58,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 867 transitions. [2018-09-18 10:13:58,265 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 867 transitions. Word has length 209 [2018-09-18 10:13:58,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:13:58,267 INFO L480 AbstractCegarLoop]: Abstraction has 532 states and 867 transitions. [2018-09-18 10:13:58,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 10:13:58,267 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 867 transitions. [2018-09-18 10:13:58,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-09-18 10:13:58,278 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:13:58,278 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:13:58,279 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:13:58,279 INFO L82 PathProgramCache]: Analyzing trace with hash 909218688, now seen corresponding path program 1 times [2018-09-18 10:13:58,280 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:13:58,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:13:58,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:13:58,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:13:58,282 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:13:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:13:58,779 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 10:13:58,780 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:13:58,780 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 10:13:58,780 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:13:58,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 10:13:58,783 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 10:13:58,783 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 10:13:58,783 INFO L87 Difference]: Start difference. First operand 532 states and 867 transitions. Second operand 3 states. [2018-09-18 10:14:01,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:14:01,012 INFO L93 Difference]: Finished difference Result 1493 states and 2512 transitions. [2018-09-18 10:14:01,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 10:14:01,012 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 222 [2018-09-18 10:14:01,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:14:01,020 INFO L225 Difference]: With dead ends: 1493 [2018-09-18 10:14:01,020 INFO L226 Difference]: Without dead ends: 967 [2018-09-18 10:14:01,024 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 10:14:01,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2018-09-18 10:14:01,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 951. [2018-09-18 10:14:01,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 951 states. [2018-09-18 10:14:01,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 1540 transitions. [2018-09-18 10:14:01,070 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 1540 transitions. Word has length 222 [2018-09-18 10:14:01,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:14:01,070 INFO L480 AbstractCegarLoop]: Abstraction has 951 states and 1540 transitions. [2018-09-18 10:14:01,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 10:14:01,071 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 1540 transitions. [2018-09-18 10:14:01,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-09-18 10:14:01,078 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:14:01,078 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:14:01,079 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:14:01,079 INFO L82 PathProgramCache]: Analyzing trace with hash 262134433, now seen corresponding path program 1 times [2018-09-18 10:14:01,079 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:14:01,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:14:01,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:14:01,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:14:01,081 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:14:01,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:14:01,411 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:14:01,411 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:14:01,411 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 10:14:01,411 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:14:01,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 10:14:01,413 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 10:14:01,413 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-18 10:14:01,413 INFO L87 Difference]: Start difference. First operand 951 states and 1540 transitions. Second operand 6 states. [2018-09-18 10:14:05,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:14:05,110 INFO L93 Difference]: Finished difference Result 2784 states and 4694 transitions. [2018-09-18 10:14:05,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 10:14:05,111 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 237 [2018-09-18 10:14:05,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:14:05,127 INFO L225 Difference]: With dead ends: 2784 [2018-09-18 10:14:05,127 INFO L226 Difference]: Without dead ends: 1839 [2018-09-18 10:14:05,131 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-18 10:14:05,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2018-09-18 10:14:05,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1809. [2018-09-18 10:14:05,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1809 states. [2018-09-18 10:14:05,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 2782 transitions. [2018-09-18 10:14:05,210 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 2782 transitions. Word has length 237 [2018-09-18 10:14:05,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:14:05,210 INFO L480 AbstractCegarLoop]: Abstraction has 1809 states and 2782 transitions. [2018-09-18 10:14:05,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 10:14:05,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 2782 transitions. [2018-09-18 10:14:05,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-09-18 10:14:05,221 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:14:05,221 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:14:05,221 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:14:05,222 INFO L82 PathProgramCache]: Analyzing trace with hash -789776746, now seen corresponding path program 1 times [2018-09-18 10:14:05,222 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:14:05,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:14:05,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:14:05,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:14:05,223 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:14:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:14:05,472 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:14:05,472 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:14:05,473 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 10:14:05,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:14:05,491 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:14:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:14:05,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:14:06,345 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-09-18 10:14:06,345 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:14:07,498 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-09-18 10:14:07,533 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:14:07,533 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-09-18 10:14:07,534 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:14:07,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 10:14:07,535 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 10:14:07,535 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-09-18 10:14:07,536 INFO L87 Difference]: Start difference. First operand 1809 states and 2782 transitions. Second operand 5 states. [2018-09-18 10:14:08,426 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-09-18 10:14:10,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:14:10,544 INFO L93 Difference]: Finished difference Result 5676 states and 8986 transitions. [2018-09-18 10:14:10,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-18 10:14:10,546 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 256 [2018-09-18 10:14:10,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:14:10,571 INFO L225 Difference]: With dead ends: 5676 [2018-09-18 10:14:10,571 INFO L226 Difference]: Without dead ends: 3873 [2018-09-18 10:14:10,581 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 504 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-09-18 10:14:10,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3873 states. [2018-09-18 10:14:10,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3873 to 3650. [2018-09-18 10:14:10,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3650 states. [2018-09-18 10:14:10,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3650 states to 3650 states and 5476 transitions. [2018-09-18 10:14:10,700 INFO L78 Accepts]: Start accepts. Automaton has 3650 states and 5476 transitions. Word has length 256 [2018-09-18 10:14:10,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:14:10,701 INFO L480 AbstractCegarLoop]: Abstraction has 3650 states and 5476 transitions. [2018-09-18 10:14:10,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 10:14:10,701 INFO L276 IsEmpty]: Start isEmpty. Operand 3650 states and 5476 transitions. [2018-09-18 10:14:10,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-09-18 10:14:10,718 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:14:10,719 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:14:10,719 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:14:10,720 INFO L82 PathProgramCache]: Analyzing trace with hash 182111589, now seen corresponding path program 1 times [2018-09-18 10:14:10,720 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:14:10,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:14:10,721 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:14:10,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:14:10,721 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:14:10,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:14:11,242 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:14:11,242 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:14:11,242 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 10:14:11,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:14:11,254 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:14:11,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:14:11,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:14:11,642 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-09-18 10:14:11,642 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:14:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-09-18 10:14:11,788 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 10:14:11,788 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2018-09-18 10:14:11,789 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:14:11,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 10:14:11,789 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 10:14:11,790 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-18 10:14:11,790 INFO L87 Difference]: Start difference. First operand 3650 states and 5476 transitions. Second operand 3 states. [2018-09-18 10:14:13,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:14:13,754 INFO L93 Difference]: Finished difference Result 7297 states and 10977 transitions. [2018-09-18 10:14:13,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 10:14:13,758 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 256 [2018-09-18 10:14:13,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:14:13,782 INFO L225 Difference]: With dead ends: 7297 [2018-09-18 10:14:13,783 INFO L226 Difference]: Without dead ends: 3653 [2018-09-18 10:14:13,797 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 511 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-18 10:14:13,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3653 states. [2018-09-18 10:14:13,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3653 to 3650. [2018-09-18 10:14:13,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3650 states. [2018-09-18 10:14:13,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3650 states to 3650 states and 5083 transitions. [2018-09-18 10:14:13,912 INFO L78 Accepts]: Start accepts. Automaton has 3650 states and 5083 transitions. Word has length 256 [2018-09-18 10:14:13,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:14:13,913 INFO L480 AbstractCegarLoop]: Abstraction has 3650 states and 5083 transitions. [2018-09-18 10:14:13,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 10:14:13,913 INFO L276 IsEmpty]: Start isEmpty. Operand 3650 states and 5083 transitions. [2018-09-18 10:14:13,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-09-18 10:14:13,928 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:14:13,928 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:14:13,928 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:14:13,929 INFO L82 PathProgramCache]: Analyzing trace with hash 251638924, now seen corresponding path program 1 times [2018-09-18 10:14:13,929 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:14:13,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:14:13,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:14:13,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:14:13,930 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:14:13,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:14:14,440 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:14:14,441 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:14:14,441 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-18 10:14:14,441 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:14:14,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-18 10:14:14,442 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-18 10:14:14,442 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 10:14:14,442 INFO L87 Difference]: Start difference. First operand 3650 states and 5083 transitions. Second operand 4 states. [2018-09-18 10:14:16,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:14:16,924 INFO L93 Difference]: Finished difference Result 10377 states and 14807 transitions. [2018-09-18 10:14:16,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-18 10:14:16,925 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 255 [2018-09-18 10:14:16,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:14:16,961 INFO L225 Difference]: With dead ends: 10377 [2018-09-18 10:14:16,961 INFO L226 Difference]: Without dead ends: 6733 [2018-09-18 10:14:16,980 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 10:14:16,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6733 states. [2018-09-18 10:14:17,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6733 to 6657. [2018-09-18 10:14:17,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6657 states. [2018-09-18 10:14:17,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6657 states to 6657 states and 9251 transitions. [2018-09-18 10:14:17,160 INFO L78 Accepts]: Start accepts. Automaton has 6657 states and 9251 transitions. Word has length 255 [2018-09-18 10:14:17,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:14:17,161 INFO L480 AbstractCegarLoop]: Abstraction has 6657 states and 9251 transitions. [2018-09-18 10:14:17,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-18 10:14:17,161 INFO L276 IsEmpty]: Start isEmpty. Operand 6657 states and 9251 transitions. [2018-09-18 10:14:17,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-09-18 10:14:17,192 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:14:17,193 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:14:17,193 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:14:17,193 INFO L82 PathProgramCache]: Analyzing trace with hash -337628274, now seen corresponding path program 1 times [2018-09-18 10:14:17,195 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:14:17,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:14:17,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:14:17,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:14:17,197 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:14:17,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:14:17,911 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-09-18 10:14:17,911 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:14:17,911 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 10:14:17,911 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:14:17,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 10:14:17,912 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 10:14:17,912 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-18 10:14:17,913 INFO L87 Difference]: Start difference. First operand 6657 states and 9251 transitions. Second operand 6 states. [2018-09-18 10:14:20,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:14:20,502 INFO L93 Difference]: Finished difference Result 14108 states and 19863 transitions. [2018-09-18 10:14:20,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-18 10:14:20,503 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 257 [2018-09-18 10:14:20,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:14:20,536 INFO L225 Difference]: With dead ends: 14108 [2018-09-18 10:14:20,536 INFO L226 Difference]: Without dead ends: 7437 [2018-09-18 10:14:20,554 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-18 10:14:20,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7437 states. [2018-09-18 10:14:20,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7437 to 7259. [2018-09-18 10:14:20,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7259 states. [2018-09-18 10:14:20,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7259 states to 7259 states and 9938 transitions. [2018-09-18 10:14:20,733 INFO L78 Accepts]: Start accepts. Automaton has 7259 states and 9938 transitions. Word has length 257 [2018-09-18 10:14:20,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:14:20,734 INFO L480 AbstractCegarLoop]: Abstraction has 7259 states and 9938 transitions. [2018-09-18 10:14:20,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 10:14:20,734 INFO L276 IsEmpty]: Start isEmpty. Operand 7259 states and 9938 transitions. [2018-09-18 10:14:20,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-09-18 10:14:20,758 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:14:20,759 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:14:20,759 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:14:20,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1081955538, now seen corresponding path program 1 times [2018-09-18 10:14:20,760 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:14:20,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:14:20,761 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:14:20,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:14:20,761 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:14:20,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:14:21,333 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-18 10:14:21,333 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:14:21,334 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 10:14:21,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:14:21,348 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:14:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:14:21,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:14:21,823 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-18 10:14:21,824 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:14:22,431 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-18 10:14:22,452 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:14:22,452 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2018-09-18 10:14:22,452 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:14:22,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-18 10:14:22,453 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-18 10:14:22,453 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-09-18 10:14:22,453 INFO L87 Difference]: Start difference. First operand 7259 states and 9938 transitions. Second operand 4 states. [2018-09-18 10:14:23,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:14:23,974 INFO L93 Difference]: Finished difference Result 16209 states and 22406 transitions. [2018-09-18 10:14:23,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-18 10:14:23,977 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 288 [2018-09-18 10:14:23,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:14:24,016 INFO L225 Difference]: With dead ends: 16209 [2018-09-18 10:14:24,016 INFO L226 Difference]: Without dead ends: 8956 [2018-09-18 10:14:24,041 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 573 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-09-18 10:14:24,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8956 states. [2018-09-18 10:14:24,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8956 to 8953. [2018-09-18 10:14:24,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8953 states. [2018-09-18 10:14:24,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8953 states to 8953 states and 12158 transitions. [2018-09-18 10:14:24,285 INFO L78 Accepts]: Start accepts. Automaton has 8953 states and 12158 transitions. Word has length 288 [2018-09-18 10:14:24,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:14:24,286 INFO L480 AbstractCegarLoop]: Abstraction has 8953 states and 12158 transitions. [2018-09-18 10:14:24,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-18 10:14:24,286 INFO L276 IsEmpty]: Start isEmpty. Operand 8953 states and 12158 transitions. [2018-09-18 10:14:24,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-09-18 10:14:24,322 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:14:24,323 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:14:24,323 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:14:24,324 INFO L82 PathProgramCache]: Analyzing trace with hash 960946226, now seen corresponding path program 1 times [2018-09-18 10:14:24,324 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:14:24,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:14:24,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:14:24,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:14:24,325 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:14:24,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:14:24,955 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:14:24,956 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:14:24,956 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:14:24,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:14:24,966 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:14:25,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:14:25,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:14:25,544 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:14:25,545 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:14:26,125 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:14:26,150 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:14:26,150 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 6 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 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:14:26,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:14:26,172 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:14:26,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:14:26,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:14:27,100 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 6 [2018-09-18 10:14:27,214 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 89 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:14:27,214 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:14:27,539 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:14:27,542 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:14:27,542 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 5] total 10 [2018-09-18 10:14:27,542 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:14:27,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-18 10:14:27,543 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-18 10:14:27,544 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-09-18 10:14:27,544 INFO L87 Difference]: Start difference. First operand 8953 states and 12158 transitions. Second operand 7 states. [2018-09-18 10:14:32,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:14:32,543 INFO L93 Difference]: Finished difference Result 30766 states and 47122 transitions. [2018-09-18 10:14:32,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-18 10:14:32,551 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 303 [2018-09-18 10:14:32,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:14:32,675 INFO L225 Difference]: With dead ends: 30766 [2018-09-18 10:14:32,675 INFO L226 Difference]: Without dead ends: 21819 [2018-09-18 10:14:32,731 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1220 GetRequests, 1206 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-09-18 10:14:32,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21819 states. [2018-09-18 10:14:33,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21819 to 20812. [2018-09-18 10:14:33,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20812 states. [2018-09-18 10:14:33,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20812 states to 20812 states and 27997 transitions. [2018-09-18 10:14:33,667 INFO L78 Accepts]: Start accepts. Automaton has 20812 states and 27997 transitions. Word has length 303 [2018-09-18 10:14:33,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:14:33,668 INFO L480 AbstractCegarLoop]: Abstraction has 20812 states and 27997 transitions. [2018-09-18 10:14:33,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-18 10:14:33,668 INFO L276 IsEmpty]: Start isEmpty. Operand 20812 states and 27997 transitions. [2018-09-18 10:14:33,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2018-09-18 10:14:33,744 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:14:33,744 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 10:14:33,745 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:14:33,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1548274009, now seen corresponding path program 1 times [2018-09-18 10:14:33,745 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:14:33,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:14:33,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:14:33,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:14:33,746 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:14:33,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:14:34,336 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:14:34,336 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:14:34,337 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 10:14:34,352 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:14:34,352 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:14:34,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:14:34,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:14:34,713 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:14:34,713 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:14:35,167 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:14:35,188 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:14:35,188 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 10:14:35,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:14:35,204 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:14:35,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:14:35,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:14:35,786 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 107 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:14:35,787 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:14:35,909 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:14:35,912 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:14:35,913 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 5] total 9 [2018-09-18 10:14:35,913 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:14:35,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 10:14:35,915 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 10:14:35,915 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-09-18 10:14:35,915 INFO L87 Difference]: Start difference. First operand 20812 states and 27997 transitions. Second operand 6 states. [2018-09-18 10:14:39,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:14:39,577 INFO L93 Difference]: Finished difference Result 46233 states and 64758 transitions. [2018-09-18 10:14:39,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-18 10:14:39,577 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 321 [2018-09-18 10:14:39,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:14:39,671 INFO L225 Difference]: With dead ends: 46233 [2018-09-18 10:14:39,672 INFO L226 Difference]: Without dead ends: 25432 [2018-09-18 10:14:39,717 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1294 GetRequests, 1280 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-09-18 10:14:39,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25432 states. [2018-09-18 10:14:40,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25432 to 24084. [2018-09-18 10:14:40,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24084 states. [2018-09-18 10:14:40,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24084 states to 24084 states and 30261 transitions. [2018-09-18 10:14:40,286 INFO L78 Accepts]: Start accepts. Automaton has 24084 states and 30261 transitions. Word has length 321 [2018-09-18 10:14:40,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:14:40,286 INFO L480 AbstractCegarLoop]: Abstraction has 24084 states and 30261 transitions. [2018-09-18 10:14:40,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 10:14:40,286 INFO L276 IsEmpty]: Start isEmpty. Operand 24084 states and 30261 transitions. [2018-09-18 10:14:40,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2018-09-18 10:14:40,331 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:14:40,332 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 10:14:40,332 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:14:40,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1908447066, now seen corresponding path program 1 times [2018-09-18 10:14:40,332 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:14:40,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:14:40,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:14:40,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:14:40,333 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:14:40,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:14:40,678 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:14:40,679 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:14:40,679 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 10:14:40,679 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:14:40,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 10:14:40,680 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 10:14:40,680 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 10:14:40,680 INFO L87 Difference]: Start difference. First operand 24084 states and 30261 transitions. Second operand 3 states. [2018-09-18 10:14:42,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:14:42,360 INFO L93 Difference]: Finished difference Result 45279 states and 56878 transitions. [2018-09-18 10:14:42,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 10:14:42,360 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 340 [2018-09-18 10:14:42,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:14:42,406 INFO L225 Difference]: With dead ends: 45279 [2018-09-18 10:14:42,407 INFO L226 Difference]: Without dead ends: 21623 [2018-09-18 10:14:42,442 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 10:14:42,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21623 states. [2018-09-18 10:14:42,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21623 to 21378. [2018-09-18 10:14:42,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21378 states. [2018-09-18 10:14:42,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21378 states to 21378 states and 25736 transitions. [2018-09-18 10:14:42,798 INFO L78 Accepts]: Start accepts. Automaton has 21378 states and 25736 transitions. Word has length 340 [2018-09-18 10:14:42,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:14:42,799 INFO L480 AbstractCegarLoop]: Abstraction has 21378 states and 25736 transitions. [2018-09-18 10:14:42,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 10:14:42,799 INFO L276 IsEmpty]: Start isEmpty. Operand 21378 states and 25736 transitions. [2018-09-18 10:14:42,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2018-09-18 10:14:42,830 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:14:42,831 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:14:42,831 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:14:42,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1043224730, now seen corresponding path program 1 times [2018-09-18 10:14:42,831 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:14:42,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:14:42,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:14:42,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:14:42,833 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:14:42,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:14:43,427 WARN L178 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-18 10:14:43,716 WARN L178 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-18 10:14:43,809 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 178 proven. 38 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-09-18 10:14:43,809 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:14:43,809 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 10:14:43,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:14:43,818 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:14:44,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:14:44,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:14:44,486 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-09-18 10:14:44,486 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:14:44,701 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2018-09-18 10:14:45,016 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 142 proven. 56 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-09-18 10:14:45,039 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:14:45,039 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 12 [2018-09-18 10:14:45,039 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:14:45,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 10:14:45,040 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 10:14:45,040 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2018-09-18 10:14:45,041 INFO L87 Difference]: Start difference. First operand 21378 states and 25736 transitions. Second operand 5 states. [2018-09-18 10:14:47,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:14:47,091 INFO L93 Difference]: Finished difference Result 52323 states and 63116 transitions. [2018-09-18 10:14:47,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-18 10:14:47,093 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 360 [2018-09-18 10:14:47,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:14:47,166 INFO L225 Difference]: With dead ends: 52323 [2018-09-18 10:14:47,167 INFO L226 Difference]: Without dead ends: 34265 [2018-09-18 10:14:47,198 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 714 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-09-18 10:14:47,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34265 states. [2018-09-18 10:14:47,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34265 to 33156. [2018-09-18 10:14:47,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33156 states. [2018-09-18 10:14:47,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33156 states to 33156 states and 39378 transitions. [2018-09-18 10:14:47,756 INFO L78 Accepts]: Start accepts. Automaton has 33156 states and 39378 transitions. Word has length 360 [2018-09-18 10:14:47,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:14:47,756 INFO L480 AbstractCegarLoop]: Abstraction has 33156 states and 39378 transitions. [2018-09-18 10:14:47,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 10:14:47,756 INFO L276 IsEmpty]: Start isEmpty. Operand 33156 states and 39378 transitions. [2018-09-18 10:14:47,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-09-18 10:14:47,803 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:14:47,803 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, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:14:47,803 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:14:47,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1126942795, now seen corresponding path program 1 times [2018-09-18 10:14:47,804 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:14:47,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:14:47,804 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:14:47,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:14:47,805 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:14:47,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:14:48,535 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 238 proven. 2 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-09-18 10:14:48,536 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:14:48,536 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:14:48,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:14:48,544 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:14:48,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:14:48,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:14:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 205 proven. 2 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2018-09-18 10:14:48,963 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:14:49,585 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 175 proven. 60 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-09-18 10:14:49,607 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:14:49,607 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 11 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 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:14:49,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:14:49,623 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:14:50,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:14:50,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:14:50,517 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 202 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:14:50,518 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:14:51,084 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 180 proven. 60 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-09-18 10:14:51,088 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:14:51,088 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6, 10, 8] total 26 [2018-09-18 10:14:51,088 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:14:51,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-18 10:14:51,089 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-18 10:14:51,090 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2018-09-18 10:14:51,090 INFO L87 Difference]: Start difference. First operand 33156 states and 39378 transitions. Second operand 12 states. [2018-09-18 10:15:02,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:15:02,969 INFO L93 Difference]: Finished difference Result 91170 states and 119305 transitions. [2018-09-18 10:15:02,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-18 10:15:02,970 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 387 [2018-09-18 10:15:02,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:15:03,218 INFO L225 Difference]: With dead ends: 91170 [2018-09-18 10:15:03,218 INFO L226 Difference]: Without dead ends: 58630 [2018-09-18 10:15:03,311 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1626 GetRequests, 1557 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=872, Invalid=3418, Unknown=0, NotChecked=0, Total=4290 [2018-09-18 10:15:03,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58630 states. [2018-09-18 10:15:04,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58630 to 55051. [2018-09-18 10:15:04,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55051 states. [2018-09-18 10:15:04,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55051 states to 55051 states and 63670 transitions. [2018-09-18 10:15:04,580 INFO L78 Accepts]: Start accepts. Automaton has 55051 states and 63670 transitions. Word has length 387 [2018-09-18 10:15:04,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:15:04,580 INFO L480 AbstractCegarLoop]: Abstraction has 55051 states and 63670 transitions. [2018-09-18 10:15:04,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-18 10:15:04,580 INFO L276 IsEmpty]: Start isEmpty. Operand 55051 states and 63670 transitions. [2018-09-18 10:15:04,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2018-09-18 10:15:04,645 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:15:04,645 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:15:04,645 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:15:04,646 INFO L82 PathProgramCache]: Analyzing trace with hash -497271089, now seen corresponding path program 1 times [2018-09-18 10:15:04,646 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:15:04,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:15:04,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:04,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:15:04,647 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:15:04,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:04,998 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-09-18 10:15:05,232 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 191 proven. 160 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 10:15:05,232 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:15:05,232 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:15:05,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:05,504 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:15:05,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:05,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:15:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2018-09-18 10:15:05,975 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:15:06,423 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 185 proven. 102 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-09-18 10:15:06,447 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:15:06,447 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 5] total 15 [2018-09-18 10:15:06,447 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:15:06,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 10:15:06,448 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 10:15:06,448 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2018-09-18 10:15:06,449 INFO L87 Difference]: Start difference. First operand 55051 states and 63670 transitions. Second operand 5 states. [2018-09-18 10:15:08,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:15:08,902 INFO L93 Difference]: Finished difference Result 97294 states and 112580 transitions. [2018-09-18 10:15:08,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-18 10:15:08,903 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 403 [2018-09-18 10:15:08,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:15:09,022 INFO L225 Difference]: With dead ends: 97294 [2018-09-18 10:15:09,022 INFO L226 Difference]: Without dead ends: 50666 [2018-09-18 10:15:09,085 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 817 GetRequests, 800 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2018-09-18 10:15:09,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50666 states. [2018-09-18 10:15:09,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50666 to 47903. [2018-09-18 10:15:09,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47903 states. [2018-09-18 10:15:09,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47903 states to 47903 states and 54463 transitions. [2018-09-18 10:15:09,993 INFO L78 Accepts]: Start accepts. Automaton has 47903 states and 54463 transitions. Word has length 403 [2018-09-18 10:15:09,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:15:09,993 INFO L480 AbstractCegarLoop]: Abstraction has 47903 states and 54463 transitions. [2018-09-18 10:15:09,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 10:15:09,994 INFO L276 IsEmpty]: Start isEmpty. Operand 47903 states and 54463 transitions. [2018-09-18 10:15:10,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2018-09-18 10:15:10,062 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:15:10,062 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:15:10,062 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:15:10,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1296594471, now seen corresponding path program 1 times [2018-09-18 10:15:10,063 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:15:10,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:15:10,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:10,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:15:10,064 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:15:10,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:10,802 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-18 10:15:11,120 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 259 proven. 58 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-09-18 10:15:11,120 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:15:11,120 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 10:15:11,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:11,136 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:15:11,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:11,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:15:11,902 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 248 proven. 2 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2018-09-18 10:15:11,903 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:15:12,293 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 205 proven. 169 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-09-18 10:15:12,314 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:15:12,314 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 14 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 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:15:12,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:12,329 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:15:12,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:12,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:15:13,199 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 190 proven. 0 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2018-09-18 10:15:13,199 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:15:13,540 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 197 proven. 117 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-09-18 10:15:13,543 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-09-18 10:15:13,544 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5, 6, 5] total 18 [2018-09-18 10:15:13,544 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:15:13,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 10:15:13,545 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 10:15:13,545 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2018-09-18 10:15:13,545 INFO L87 Difference]: Start difference. First operand 47903 states and 54463 transitions. Second operand 5 states. [2018-09-18 10:15:15,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:15:15,308 INFO L93 Difference]: Finished difference Result 88209 states and 100071 transitions. [2018-09-18 10:15:15,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-18 10:15:15,309 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 415 [2018-09-18 10:15:15,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:15:15,434 INFO L225 Difference]: With dead ends: 88209 [2018-09-18 10:15:15,434 INFO L226 Difference]: Without dead ends: 49091 [2018-09-18 10:15:15,487 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1665 GetRequests, 1645 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2018-09-18 10:15:15,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49091 states. [2018-09-18 10:15:16,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49091 to 48994. [2018-09-18 10:15:16,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48994 states. [2018-09-18 10:15:16,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48994 states to 48994 states and 55599 transitions. [2018-09-18 10:15:16,356 INFO L78 Accepts]: Start accepts. Automaton has 48994 states and 55599 transitions. Word has length 415 [2018-09-18 10:15:16,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:15:16,356 INFO L480 AbstractCegarLoop]: Abstraction has 48994 states and 55599 transitions. [2018-09-18 10:15:16,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 10:15:16,356 INFO L276 IsEmpty]: Start isEmpty. Operand 48994 states and 55599 transitions. [2018-09-18 10:15:16,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2018-09-18 10:15:16,424 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:15:16,424 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:15:16,425 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:15:16,425 INFO L82 PathProgramCache]: Analyzing trace with hash 335770293, now seen corresponding path program 1 times [2018-09-18 10:15:16,425 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:15:16,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:15:16,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:16,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:15:16,426 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:15:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:17,135 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 254 proven. 126 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2018-09-18 10:15:17,135 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:15:17,135 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 10:15:17,144 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:17,144 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:15:17,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:17,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:15:17,957 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 291 proven. 2 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-09-18 10:15:17,957 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:15:18,201 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2018-09-18 10:15:18,463 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 239 proven. 186 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2018-09-18 10:15:18,486 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:15:18,486 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 16 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 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:15:18,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:18,507 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:15:19,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:19,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:15:19,524 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 291 proven. 2 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-09-18 10:15:19,524 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:15:19,920 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 239 proven. 186 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2018-09-18 10:15:19,923 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:15:19,923 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8, 8, 8] total 24 [2018-09-18 10:15:19,924 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:15:19,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-18 10:15:19,925 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-18 10:15:19,925 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2018-09-18 10:15:19,925 INFO L87 Difference]: Start difference. First operand 48994 states and 55599 transitions. Second operand 12 states. [2018-09-18 10:15:36,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:15:36,054 INFO L93 Difference]: Finished difference Result 163647 states and 204261 transitions. [2018-09-18 10:15:36,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-18 10:15:36,054 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 443 [2018-09-18 10:15:36,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:15:36,479 INFO L225 Difference]: With dead ends: 163647 [2018-09-18 10:15:36,479 INFO L226 Difference]: Without dead ends: 113277 [2018-09-18 10:15:36,628 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1929 GetRequests, 1829 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3477 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1417, Invalid=8885, Unknown=0, NotChecked=0, Total=10302 [2018-09-18 10:15:36,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113277 states. [2018-09-18 10:15:38,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113277 to 105755. [2018-09-18 10:15:38,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105755 states. [2018-09-18 10:15:39,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105755 states to 105755 states and 117649 transitions. [2018-09-18 10:15:39,128 INFO L78 Accepts]: Start accepts. Automaton has 105755 states and 117649 transitions. Word has length 443 [2018-09-18 10:15:39,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:15:39,128 INFO L480 AbstractCegarLoop]: Abstraction has 105755 states and 117649 transitions. [2018-09-18 10:15:39,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-18 10:15:39,128 INFO L276 IsEmpty]: Start isEmpty. Operand 105755 states and 117649 transitions. [2018-09-18 10:15:39,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2018-09-18 10:15:39,243 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:15:39,244 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:15:39,244 INFO L423 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:15:39,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1503667917, now seen corresponding path program 1 times [2018-09-18 10:15:39,244 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:15:39,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:15:39,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:39,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:15:39,245 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:15:39,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:39,850 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 331 proven. 244 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2018-09-18 10:15:39,850 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:15:39,850 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:15:39,860 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:39,860 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:15:40,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:40,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:15:40,452 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 341 proven. 0 refuted. 0 times theorem prover too weak. 643 trivial. 0 not checked. [2018-09-18 10:15:40,453 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:15:41,072 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 331 proven. 244 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2018-09-18 10:15:41,095 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:15:41,095 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-18 10:15:41,096 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:15:41,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 10:15:41,096 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 10:15:41,096 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-09-18 10:15:41,097 INFO L87 Difference]: Start difference. First operand 105755 states and 117649 transitions. Second operand 5 states. [2018-09-18 10:15:45,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:15:45,211 INFO L93 Difference]: Finished difference Result 218483 states and 243609 transitions. [2018-09-18 10:15:45,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-18 10:15:45,212 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 562 [2018-09-18 10:15:45,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:15:45,505 INFO L225 Difference]: With dead ends: 218483 [2018-09-18 10:15:45,505 INFO L226 Difference]: Without dead ends: 120489 [2018-09-18 10:15:45,625 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1131 GetRequests, 1119 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-09-18 10:15:45,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120489 states. [2018-09-18 10:15:47,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120489 to 115685. [2018-09-18 10:15:47,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115685 states. [2018-09-18 10:15:47,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115685 states to 115685 states and 128491 transitions. [2018-09-18 10:15:47,448 INFO L78 Accepts]: Start accepts. Automaton has 115685 states and 128491 transitions. Word has length 562 [2018-09-18 10:15:47,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:15:47,448 INFO L480 AbstractCegarLoop]: Abstraction has 115685 states and 128491 transitions. [2018-09-18 10:15:47,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 10:15:47,449 INFO L276 IsEmpty]: Start isEmpty. Operand 115685 states and 128491 transitions. [2018-09-18 10:15:47,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2018-09-18 10:15:47,572 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:15:47,573 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-18 10:15:47,573 INFO L423 AbstractCegarLoop]: === Iteration 18 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:15:47,573 INFO L82 PathProgramCache]: Analyzing trace with hash 2117005917, now seen corresponding path program 1 times [2018-09-18 10:15:47,573 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:15:47,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:15:47,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:47,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:15:47,575 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:15:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:48,044 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-09-18 10:15:48,411 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-09-18 10:15:49,610 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 368 proven. 506 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-09-18 10:15:49,610 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:15:49,610 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 10:15:49,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:49,620 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:15:49,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:49,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:15:50,161 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 587 proven. 4 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2018-09-18 10:15:50,162 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:15:50,524 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 372 proven. 343 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2018-09-18 10:15:50,546 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:15:50,546 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 10:15:50,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:50,562 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:15:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:51,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:15:51,683 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 587 proven. 4 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2018-09-18 10:15:51,683 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:15:52,946 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 372 proven. 343 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2018-09-18 10:15:52,950 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:15:52,951 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5, 5, 5] total 15 [2018-09-18 10:15:52,951 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:15:52,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-18 10:15:52,953 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-18 10:15:52,953 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2018-09-18 10:15:52,954 INFO L87 Difference]: Start difference. First operand 115685 states and 128491 transitions. Second operand 13 states. [2018-09-18 10:16:13,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:16:13,572 INFO L93 Difference]: Finished difference Result 550354 states and 659408 transitions. [2018-09-18 10:16:13,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-18 10:16:13,572 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 572 [2018-09-18 10:16:13,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:16:15,228 INFO L225 Difference]: With dead ends: 550354 [2018-09-18 10:16:15,229 INFO L226 Difference]: Without dead ends: 439711 [2018-09-18 10:16:15,478 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2368 GetRequests, 2305 SyntacticMatches, 11 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=599, Invalid=2263, Unknown=0, NotChecked=0, Total=2862 [2018-09-18 10:16:15,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439711 states. [2018-09-18 10:16:33,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439711 to 435447. [2018-09-18 10:16:33,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435447 states. [2018-09-18 10:16:34,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435447 states to 435447 states and 519921 transitions. [2018-09-18 10:16:34,950 INFO L78 Accepts]: Start accepts. Automaton has 435447 states and 519921 transitions. Word has length 572 [2018-09-18 10:16:34,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:16:34,951 INFO L480 AbstractCegarLoop]: Abstraction has 435447 states and 519921 transitions. [2018-09-18 10:16:34,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-18 10:16:34,951 INFO L276 IsEmpty]: Start isEmpty. Operand 435447 states and 519921 transitions. [2018-09-18 10:16:35,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 598 [2018-09-18 10:16:35,278 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:16:35,278 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:16:35,279 INFO L423 AbstractCegarLoop]: === Iteration 19 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:16:35,279 INFO L82 PathProgramCache]: Analyzing trace with hash 687616279, now seen corresponding path program 1 times [2018-09-18 10:16:35,279 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:16:35,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:16:35,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:16:35,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:16:35,280 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:16:35,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:16:35,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 477 proven. 106 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-09-18 10:16:35,804 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:16:35,805 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 10:16:36,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:16:36,656 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:16:37,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:16:37,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:16:37,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 733 proven. 14 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2018-09-18 10:16:37,219 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:16:37,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 739 proven. 8 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2018-09-18 10:16:37,583 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:16:37,583 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 10:16:37,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:16:37,600 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:16:38,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:16:38,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:16:38,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 733 proven. 14 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2018-09-18 10:16:38,673 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:16:39,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 739 proven. 8 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2018-09-18 10:16:39,505 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:16:39,505 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 15 [2018-09-18 10:16:39,505 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:16:39,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 10:16:39,507 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 10:16:39,507 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-09-18 10:16:39,507 INFO L87 Difference]: Start difference. First operand 435447 states and 519921 transitions. Second operand 9 states. [2018-09-18 10:16:42,120 WARN L178 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 Received shutdown request... [2018-09-18 10:17:26,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-18 10:17:26,852 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-18 10:17:26,859 WARN L206 ceAbstractionStarter]: Timeout [2018-09-18 10:17:26,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.09 10:17:26 BoogieIcfgContainer [2018-09-18 10:17:26,860 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-18 10:17:26,861 INFO L168 Benchmark]: Toolchain (without parser) took 218318.22 ms. Allocated memory was 1.5 GB in the beginning and 5.4 GB in the end (delta: 3.9 GB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -701.4 MB). Peak memory consumption was 4.6 GB. Max. memory is 7.1 GB. [2018-09-18 10:17:26,862 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-18 10:17:26,862 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1135.97 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. [2018-09-18 10:17:26,863 INFO L168 Benchmark]: Boogie Procedure Inliner took 155.15 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 10:17:26,864 INFO L168 Benchmark]: Boogie Preprocessor took 411.17 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 807.4 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -944.4 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. [2018-09-18 10:17:26,865 INFO L168 Benchmark]: RCFGBuilder took 4728.08 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 246.9 MB). Peak memory consumption was 246.9 MB. Max. memory is 7.1 GB. [2018-09-18 10:17:26,865 INFO L168 Benchmark]: TraceAbstraction took 211880.54 ms. Allocated memory was 2.3 GB in the beginning and 5.4 GB in the end (delta: 3.1 GB). Free memory was 2.0 GB in the beginning and 2.1 GB in the end (delta: -109.6 MB). Peak memory consumption was 4.4 GB. Max. memory is 7.1 GB. [2018-09-18 10:17:26,870 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1135.97 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 155.15 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 411.17 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 807.4 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -944.4 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4728.08 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 246.9 MB). Peak memory consumption was 246.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 211880.54 ms. Allocated memory was 2.3 GB in the beginning and 5.4 GB in the end (delta: 3.1 GB). Free memory was 2.0 GB in the beginning and 2.1 GB in the end (delta: -109.6 MB). Peak memory consumption was 4.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1641]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1641). Cancelled while BasicCegarLoop was constructing difference of abstraction (435447states) and FLOYD_HOARE automaton (currently 49 states, 9 states before enhancement), while ReachableStatesComputation was computing reachable states (1514231 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 211.8s OverallTime, 19 OverallIterations, 7 TraceHistogramMax, 140.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4988 SDtfs, 29138 SDslu, 8460 SDs, 0 SdLazy, 46304 SolverSat, 9819 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 61.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16892 GetRequests, 16453 SyntacticMatches, 59 SemanticMatches, 380 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6537 ImplicationChecksByTransitivity, 16.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=435447occurred in iteration=18, 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: 30.2s AutomataMinimizationTime, 18 MinimizatonAttempts, 27269 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.5s SsaConstructionTime, 7.9s SatisfiabilityAnalysisTime, 25.3s InterpolantComputationTime, 14884 NumberOfCodeBlocks, 14884 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 23026 ConstructedInterpolants, 0 QuantifiedInterpolants, 25990776 SizeOfPredicates, 112 NumberOfNonLiveVariables, 28810 ConjunctsInSsa, 291 ConjunctsInUnsatCore, 59 InterpolantComputations, 14 PerfectInterpolantSequences, 19386/22864 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_label21_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-18_10-17-26-883.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label21_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-18_10-17-26-883.csv Completed graceful shutdown