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_label41_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dace188-m [2018-09-14 16:04:53,390 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-14 16:04:53,393 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-14 16:04:53,406 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-14 16:04:53,410 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-14 16:04:53,411 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-14 16:04:53,413 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-14 16:04:53,419 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-14 16:04:53,424 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-14 16:04:53,425 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-14 16:04:53,429 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-14 16:04:53,430 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-14 16:04:53,431 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-14 16:04:53,432 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-14 16:04:53,433 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-14 16:04:53,434 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-14 16:04:53,435 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-14 16:04:53,437 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-14 16:04:53,440 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-14 16:04:53,442 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-14 16:04:53,443 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-14 16:04:53,444 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-14 16:04:53,447 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-14 16:04:53,447 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-14 16:04:53,448 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-14 16:04:53,449 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-14 16:04:53,450 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-14 16:04:53,451 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-14 16:04:53,452 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-14 16:04:53,453 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-14 16:04:53,454 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-14 16:04:53,455 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-14 16:04:53,455 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-14 16:04:53,455 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-14 16:04:53,456 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-14 16:04:53,459 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-14 16:04:53,459 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-14 16:04:53,481 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-14 16:04:53,481 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-14 16:04:53,482 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-14 16:04:53,482 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-14 16:04:53,483 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-14 16:04:53,483 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-14 16:04:53,483 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-14 16:04:53,483 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-14 16:04:53,483 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-14 16:04:53,484 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-14 16:04:53,484 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-14 16:04:53,485 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-14 16:04:53,485 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-14 16:04:53,485 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-14 16:04:53,485 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-14 16:04:53,486 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-14 16:04:53,486 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-14 16:04:53,486 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-14 16:04:53,486 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-14 16:04:53,487 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-14 16:04:53,487 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-14 16:04:53,487 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-14 16:04:53,487 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-14 16:04:53,487 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 16:04:53,488 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-14 16:04:53,488 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-14 16:04:53,488 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-14 16:04:53,488 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-14 16:04:53,489 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-14 16:04:53,489 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-14 16:04:53,489 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-14 16:04:53,489 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-14 16:04:53,489 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-14 16:04:53,541 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-14 16:04:53,557 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-14 16:04:53,564 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-14 16:04:53,566 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-14 16:04:53,567 INFO L276 PluginConnector]: CDTParser initialized [2018-09-14 16:04:53,568 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label41_true-unreach-call.c [2018-09-14 16:04:53,982 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec5039fbb/283b34927de1466cacad5afaf2902678/FLAGf828a0590 [2018-09-14 16:04:54,359 INFO L277 CDTParser]: Found 1 translation units. [2018-09-14 16:04:54,360 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label41_true-unreach-call.c [2018-09-14 16:04:54,384 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec5039fbb/283b34927de1466cacad5afaf2902678/FLAGf828a0590 [2018-09-14 16:04:54,407 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec5039fbb/283b34927de1466cacad5afaf2902678 [2018-09-14 16:04:54,422 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-14 16:04:54,426 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-14 16:04:54,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-14 16:04:54,428 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-14 16:04:54,436 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-14 16:04:54,438 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 04:04:54" (1/1) ... [2018-09-14 16:04:54,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b469391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:04:54, skipping insertion in model container [2018-09-14 16:04:54,442 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 04:04:54" (1/1) ... [2018-09-14 16:04:54,454 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-14 16:04:55,216 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 16:04:55,238 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-14 16:04:55,566 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 16:04:55,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:04:55 WrapperNode [2018-09-14 16:04:55,667 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-14 16:04:55,668 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-14 16:04:55,669 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-14 16:04:55,669 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-14 16:04:55,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:04:55" (1/1) ... [2018-09-14 16:04:55,724 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:04:55" (1/1) ... [2018-09-14 16:04:55,808 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-14 16:04:55,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-14 16:04:55,809 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-14 16:04:55,809 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-14 16:04:56,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:04:55" (1/1) ... [2018-09-14 16:04:56,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:04:55" (1/1) ... [2018-09-14 16:04:56,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:04:55" (1/1) ... [2018-09-14 16:04:56,073 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:04:55" (1/1) ... [2018-09-14 16:04:56,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:04:55" (1/1) ... [2018-09-14 16:04:56,163 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:04:55" (1/1) ... [2018-09-14 16:04:56,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:04:55" (1/1) ... [2018-09-14 16:04:56,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-14 16:04:56,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-14 16:04:56,208 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-14 16:04:56,208 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-14 16:04:56,209 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:04:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 16:04:56,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-14 16:04:56,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-14 16:04:56,286 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-14 16:04:56,286 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-14 16:04:56,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-14 16:04:56,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-14 16:04:56,287 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-14 16:04:56,287 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-14 16:05:01,376 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-14 16:05:01,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 04:05:01 BoogieIcfgContainer [2018-09-14 16:05:01,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-14 16:05:01,379 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-14 16:05:01,379 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-14 16:05:01,382 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-14 16:05:01,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 04:04:54" (1/3) ... [2018-09-14 16:05:01,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@161ca8fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 04:05:01, skipping insertion in model container [2018-09-14 16:05:01,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:04:55" (2/3) ... [2018-09-14 16:05:01,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@161ca8fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 04:05:01, skipping insertion in model container [2018-09-14 16:05:01,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 04:05:01" (3/3) ... [2018-09-14 16:05:01,387 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label41_true-unreach-call.c [2018-09-14 16:05:01,398 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-14 16:05:01,408 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-14 16:05:01,469 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-14 16:05:01,470 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-14 16:05:01,470 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-14 16:05:01,470 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-14 16:05:01,470 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-14 16:05:01,470 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-14 16:05:01,471 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-14 16:05:01,471 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-14 16:05:01,471 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-14 16:05:01,504 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-09-14 16:05:01,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-09-14 16:05:01,525 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:05:01,527 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] [2018-09-14 16:05:01,528 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:05:01,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1737651188, now seen corresponding path program 1 times [2018-09-14 16:05:01,538 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:05:01,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:01,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:01,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:01,604 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:05:01,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:02,582 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-09-14 16:05:02,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:05:02,899 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:05:02,899 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-14 16:05:02,899 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:05:02,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-14 16:05:02,921 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-14 16:05:02,922 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 16:05:02,924 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 4 states. [2018-09-14 16:05:06,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:05:06,280 INFO L93 Difference]: Finished difference Result 1074 states and 1924 transitions. [2018-09-14 16:05:06,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-14 16:05:06,282 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 189 [2018-09-14 16:05:06,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:05:06,308 INFO L225 Difference]: With dead ends: 1074 [2018-09-14 16:05:06,308 INFO L226 Difference]: Without dead ends: 756 [2018-09-14 16:05:06,317 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 16:05:06,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2018-09-14 16:05:06,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 520. [2018-09-14 16:05:06,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2018-09-14 16:05:06,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 919 transitions. [2018-09-14 16:05:06,422 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 919 transitions. Word has length 189 [2018-09-14 16:05:06,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:05:06,423 INFO L480 AbstractCegarLoop]: Abstraction has 520 states and 919 transitions. [2018-09-14 16:05:06,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-14 16:05:06,424 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 919 transitions. [2018-09-14 16:05:06,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-09-14 16:05:06,432 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:05:06,432 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] [2018-09-14 16:05:06,432 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:05:06,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1467958639, now seen corresponding path program 1 times [2018-09-14 16:05:06,433 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:05:06,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:06,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:06,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:06,435 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:05:06,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:06,806 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:05:06,806 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:05:06,806 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 16:05:06,806 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:05:06,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:05:06,809 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:05:06,809 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 16:05:06,809 INFO L87 Difference]: Start difference. First operand 520 states and 919 transitions. Second operand 6 states. [2018-09-14 16:05:10,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:05:10,769 INFO L93 Difference]: Finished difference Result 1482 states and 2700 transitions. [2018-09-14 16:05:10,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 16:05:10,772 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 217 [2018-09-14 16:05:10,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:05:10,789 INFO L225 Difference]: With dead ends: 1482 [2018-09-14 16:05:10,789 INFO L226 Difference]: Without dead ends: 968 [2018-09-14 16:05:10,796 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-14 16:05:10,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2018-09-14 16:05:10,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 949. [2018-09-14 16:05:10,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 949 states. [2018-09-14 16:05:10,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1579 transitions. [2018-09-14 16:05:10,854 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1579 transitions. Word has length 217 [2018-09-14 16:05:10,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:05:10,854 INFO L480 AbstractCegarLoop]: Abstraction has 949 states and 1579 transitions. [2018-09-14 16:05:10,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:05:10,855 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1579 transitions. [2018-09-14 16:05:10,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-09-14 16:05:10,860 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:05:10,861 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] [2018-09-14 16:05:10,861 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:05:10,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1187874820, now seen corresponding path program 1 times [2018-09-14 16:05:10,861 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:05:10,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:10,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:10,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:10,863 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:05:10,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:11,237 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:05:11,238 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:05:11,238 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 16:05:11,238 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:05:11,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:05:11,239 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:05:11,239 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:05:11,240 INFO L87 Difference]: Start difference. First operand 949 states and 1579 transitions. Second operand 3 states. [2018-09-14 16:05:13,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:05:13,663 INFO L93 Difference]: Finished difference Result 2535 states and 4260 transitions. [2018-09-14 16:05:13,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:05:13,664 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 235 [2018-09-14 16:05:13,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:05:13,679 INFO L225 Difference]: With dead ends: 2535 [2018-09-14 16:05:13,679 INFO L226 Difference]: Without dead ends: 1592 [2018-09-14 16:05:13,684 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:05:13,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2018-09-14 16:05:13,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1590. [2018-09-14 16:05:13,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1590 states. [2018-09-14 16:05:13,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 2503 transitions. [2018-09-14 16:05:13,756 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 2503 transitions. Word has length 235 [2018-09-14 16:05:13,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:05:13,757 INFO L480 AbstractCegarLoop]: Abstraction has 1590 states and 2503 transitions. [2018-09-14 16:05:13,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:05:13,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 2503 transitions. [2018-09-14 16:05:13,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-09-14 16:05:13,772 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:05:13,772 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:05:13,773 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:05:13,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1850495347, now seen corresponding path program 1 times [2018-09-14 16:05:13,773 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:05:13,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:13,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:13,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:13,775 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:05:13,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:14,105 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 16:05:14,298 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 54 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:05:14,299 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:05:14,299 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:05:14,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:14,311 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:05:14,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:14,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:05:14,944 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-09-14 16:05:14,945 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:05:15,815 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 54 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:05:15,838 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:05:15,838 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-09-14 16:05:15,838 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:05:15,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:05:15,839 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:05:15,840 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-09-14 16:05:15,841 INFO L87 Difference]: Start difference. First operand 1590 states and 2503 transitions. Second operand 5 states. [2018-09-14 16:05:16,400 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 7 [2018-09-14 16:05:18,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:05:18,698 INFO L93 Difference]: Finished difference Result 4071 states and 6536 transitions. [2018-09-14 16:05:18,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 16:05:18,699 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 251 [2018-09-14 16:05:18,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:05:18,716 INFO L225 Difference]: With dead ends: 4071 [2018-09-14 16:05:18,717 INFO L226 Difference]: Without dead ends: 2487 [2018-09-14 16:05:18,727 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 496 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2018-09-14 16:05:18,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2018-09-14 16:05:18,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 2428. [2018-09-14 16:05:18,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2428 states. [2018-09-14 16:05:18,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2428 states to 2428 states and 3453 transitions. [2018-09-14 16:05:18,832 INFO L78 Accepts]: Start accepts. Automaton has 2428 states and 3453 transitions. Word has length 251 [2018-09-14 16:05:18,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:05:18,833 INFO L480 AbstractCegarLoop]: Abstraction has 2428 states and 3453 transitions. [2018-09-14 16:05:18,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:05:18,833 INFO L276 IsEmpty]: Start isEmpty. Operand 2428 states and 3453 transitions. [2018-09-14 16:05:18,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-09-14 16:05:18,844 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:05:18,847 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:05:18,847 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:05:18,848 INFO L82 PathProgramCache]: Analyzing trace with hash -2115580027, now seen corresponding path program 1 times [2018-09-14 16:05:18,848 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:05:18,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:18,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:18,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:18,849 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:05:18,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:19,375 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:05:19,375 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:05:19,376 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:05:19,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:19,387 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:05:19,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:19,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:05:19,797 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-09-14 16:05:19,797 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:05:19,971 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-09-14 16:05:19,993 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 16:05:19,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-14 16:05:19,993 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:05:19,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:05:19,994 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:05:19,994 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:05:19,996 INFO L87 Difference]: Start difference. First operand 2428 states and 3453 transitions. Second operand 3 states. [2018-09-14 16:05:22,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:05:22,269 INFO L93 Difference]: Finished difference Result 7183 states and 10452 transitions. [2018-09-14 16:05:22,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:05:22,276 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 253 [2018-09-14 16:05:22,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:05:22,303 INFO L225 Difference]: With dead ends: 7183 [2018-09-14 16:05:22,303 INFO L226 Difference]: Without dead ends: 4761 [2018-09-14 16:05:22,314 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 504 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:05:22,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4761 states. [2018-09-14 16:05:22,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4761 to 4717. [2018-09-14 16:05:22,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4717 states. [2018-09-14 16:05:22,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4717 states to 4717 states and 6688 transitions. [2018-09-14 16:05:22,466 INFO L78 Accepts]: Start accepts. Automaton has 4717 states and 6688 transitions. Word has length 253 [2018-09-14 16:05:22,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:05:22,467 INFO L480 AbstractCegarLoop]: Abstraction has 4717 states and 6688 transitions. [2018-09-14 16:05:22,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:05:22,467 INFO L276 IsEmpty]: Start isEmpty. Operand 4717 states and 6688 transitions. [2018-09-14 16:05:22,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-09-14 16:05:22,488 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:05:22,489 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:05:22,489 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:05:22,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1557357935, now seen corresponding path program 1 times [2018-09-14 16:05:22,490 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:05:22,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:22,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:22,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:22,491 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:05:22,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:22,934 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 80 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-09-14 16:05:22,934 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:05:22,934 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:05:22,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:22,951 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:05:23,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:23,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:05:23,517 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:05:23,517 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:05:23,670 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-14 16:05:23,783 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:05:23,805 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:05:23,805 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:05:23,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:23,824 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:05:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:24,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:05:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:05:25,166 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:05:25,664 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:05:25,670 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:05:25,671 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 16 [2018-09-14 16:05:25,671 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:05:25,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 16:05:25,672 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 16:05:25,673 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2018-09-14 16:05:25,673 INFO L87 Difference]: Start difference. First operand 4717 states and 6688 transitions. Second operand 9 states. [2018-09-14 16:05:28,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:05:28,408 INFO L93 Difference]: Finished difference Result 9704 states and 13898 transitions. [2018-09-14 16:05:28,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-14 16:05:28,409 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 264 [2018-09-14 16:05:28,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:05:28,432 INFO L225 Difference]: With dead ends: 9704 [2018-09-14 16:05:28,433 INFO L226 Difference]: Without dead ends: 4993 [2018-09-14 16:05:28,449 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1074 GetRequests, 1050 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2018-09-14 16:05:28,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4993 states. [2018-09-14 16:05:28,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4993 to 4807. [2018-09-14 16:05:28,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4807 states. [2018-09-14 16:05:28,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4807 states to 4807 states and 6200 transitions. [2018-09-14 16:05:28,580 INFO L78 Accepts]: Start accepts. Automaton has 4807 states and 6200 transitions. Word has length 264 [2018-09-14 16:05:28,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:05:28,582 INFO L480 AbstractCegarLoop]: Abstraction has 4807 states and 6200 transitions. [2018-09-14 16:05:28,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 16:05:28,582 INFO L276 IsEmpty]: Start isEmpty. Operand 4807 states and 6200 transitions. [2018-09-14 16:05:28,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2018-09-14 16:05:28,600 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:05:28,600 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:05:28,601 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:05:28,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1934379187, now seen corresponding path program 1 times [2018-09-14 16:05:28,603 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:05:28,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:28,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:28,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:28,604 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:05:28,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:28,860 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:05:28,861 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:05:28,861 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:05:28,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:28,871 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:05:29,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:29,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:05:29,345 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-09-14 16:05:29,345 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:05:29,949 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 107 proven. 32 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:05:29,971 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:05:29,971 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2018-09-14 16:05:29,971 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:05:29,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:05:29,972 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:05:29,972 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2018-09-14 16:05:29,972 INFO L87 Difference]: Start difference. First operand 4807 states and 6200 transitions. Second operand 6 states. [2018-09-14 16:05:32,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:05:32,335 INFO L93 Difference]: Finished difference Result 10620 states and 14154 transitions. [2018-09-14 16:05:32,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-14 16:05:32,335 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 304 [2018-09-14 16:05:32,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:05:32,369 INFO L225 Difference]: With dead ends: 10620 [2018-09-14 16:05:32,369 INFO L226 Difference]: Without dead ends: 5375 [2018-09-14 16:05:32,388 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 619 GetRequests, 600 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2018-09-14 16:05:32,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5375 states. [2018-09-14 16:05:32,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5375 to 5169. [2018-09-14 16:05:32,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5169 states. [2018-09-14 16:05:32,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5169 states to 5169 states and 6616 transitions. [2018-09-14 16:05:32,542 INFO L78 Accepts]: Start accepts. Automaton has 5169 states and 6616 transitions. Word has length 304 [2018-09-14 16:05:32,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:05:32,543 INFO L480 AbstractCegarLoop]: Abstraction has 5169 states and 6616 transitions. [2018-09-14 16:05:32,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:05:32,543 INFO L276 IsEmpty]: Start isEmpty. Operand 5169 states and 6616 transitions. [2018-09-14 16:05:32,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-09-14 16:05:32,564 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:05:32,564 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:05:32,565 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:05:32,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1587871350, now seen corresponding path program 1 times [2018-09-14 16:05:32,565 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:05:32,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:32,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:32,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:32,566 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:05:32,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:33,030 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 131 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:05:33,030 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:05:33,030 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:05:33,124 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:33,125 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:05:33,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:33,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:05:33,432 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:05:33,432 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:05:33,547 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:05:33,569 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 16:05:33,570 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-14 16:05:33,570 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:05:33,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:05:33,571 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:05:33,571 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:05:33,571 INFO L87 Difference]: Start difference. First operand 5169 states and 6616 transitions. Second operand 3 states. [2018-09-14 16:05:35,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:05:35,262 INFO L93 Difference]: Finished difference Result 14581 states and 18997 transitions. [2018-09-14 16:05:35,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:05:35,263 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 315 [2018-09-14 16:05:35,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:05:35,317 INFO L225 Difference]: With dead ends: 14581 [2018-09-14 16:05:35,318 INFO L226 Difference]: Without dead ends: 9418 [2018-09-14 16:05:35,337 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 628 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:05:35,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9418 states. [2018-09-14 16:05:35,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9418 to 9334. [2018-09-14 16:05:35,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9334 states. [2018-09-14 16:05:35,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9334 states to 9334 states and 11830 transitions. [2018-09-14 16:05:35,550 INFO L78 Accepts]: Start accepts. Automaton has 9334 states and 11830 transitions. Word has length 315 [2018-09-14 16:05:35,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:05:35,551 INFO L480 AbstractCegarLoop]: Abstraction has 9334 states and 11830 transitions. [2018-09-14 16:05:35,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:05:35,552 INFO L276 IsEmpty]: Start isEmpty. Operand 9334 states and 11830 transitions. [2018-09-14 16:05:35,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2018-09-14 16:05:35,585 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:05:35,586 INFO L376 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 16:05:35,586 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:05:35,587 INFO L82 PathProgramCache]: Analyzing trace with hash -838907546, now seen corresponding path program 1 times [2018-09-14 16:05:35,587 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:05:35,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:35,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:35,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:35,588 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:05:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:36,071 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 141 proven. 36 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-09-14 16:05:36,071 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:05:36,071 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:05:36,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:36,079 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:05:36,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:36,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:05:36,405 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 153 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-09-14 16:05:36,406 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:05:36,542 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 141 proven. 36 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-09-14 16:05:36,563 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:05:36,564 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:05:36,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:36,579 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:05:37,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:37,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:05:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 153 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-09-14 16:05:37,300 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:05:37,460 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 141 proven. 36 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-09-14 16:05:37,464 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:05:37,465 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 15 [2018-09-14 16:05:37,465 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:05:37,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 16:05:37,466 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 16:05:37,468 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-09-14 16:05:37,468 INFO L87 Difference]: Start difference. First operand 9334 states and 11830 transitions. Second operand 9 states. [2018-09-14 16:05:47,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:05:47,701 INFO L93 Difference]: Finished difference Result 38377 states and 61815 transitions. [2018-09-14 16:05:47,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-14 16:05:47,702 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 321 [2018-09-14 16:05:47,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:05:47,943 INFO L225 Difference]: With dead ends: 38377 [2018-09-14 16:05:47,943 INFO L226 Difference]: Without dead ends: 29049 [2018-09-14 16:05:48,029 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1364 GetRequests, 1311 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=503, Invalid=2253, Unknown=0, NotChecked=0, Total=2756 [2018-09-14 16:05:48,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29049 states. [2018-09-14 16:05:49,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29049 to 26299. [2018-09-14 16:05:49,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26299 states. [2018-09-14 16:05:49,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26299 states to 26299 states and 33959 transitions. [2018-09-14 16:05:49,372 INFO L78 Accepts]: Start accepts. Automaton has 26299 states and 33959 transitions. Word has length 321 [2018-09-14 16:05:49,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:05:49,373 INFO L480 AbstractCegarLoop]: Abstraction has 26299 states and 33959 transitions. [2018-09-14 16:05:49,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 16:05:49,373 INFO L276 IsEmpty]: Start isEmpty. Operand 26299 states and 33959 transitions. [2018-09-14 16:05:49,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-09-14 16:05:49,476 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:05:49,477 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 16:05:49,477 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:05:49,477 INFO L82 PathProgramCache]: Analyzing trace with hash -741077395, now seen corresponding path program 1 times [2018-09-14 16:05:49,477 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:05:49,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:49,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:49,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:49,479 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:05:49,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:50,087 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:05:50,087 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:05:50,088 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:05:50,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:50,095 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:05:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:50,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:05:50,382 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:05:50,382 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:05:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:05:50,522 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:05:50,522 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 [2018-09-14 16:05:50,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:50,541 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:05:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:51,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:05:51,375 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 133 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-09-14 16:05:51,375 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:05:51,637 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-09-14 16:05:51,640 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-09-14 16:05:51,641 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5, 5, 5] total 13 [2018-09-14 16:05:51,641 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:05:51,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:05:51,642 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:05:51,642 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2018-09-14 16:05:51,643 INFO L87 Difference]: Start difference. First operand 26299 states and 33959 transitions. Second operand 5 states. [2018-09-14 16:05:54,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:05:54,080 INFO L93 Difference]: Finished difference Result 73357 states and 94919 transitions. [2018-09-14 16:05:54,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 16:05:54,080 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 327 [2018-09-14 16:05:54,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:05:54,242 INFO L225 Difference]: With dead ends: 73357 [2018-09-14 16:05:54,242 INFO L226 Difference]: Without dead ends: 46671 [2018-09-14 16:05:54,315 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1313 GetRequests, 1298 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-09-14 16:05:54,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46671 states. [2018-09-14 16:05:55,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46671 to 45879. [2018-09-14 16:05:55,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45879 states. [2018-09-14 16:05:55,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45879 states to 45879 states and 57987 transitions. [2018-09-14 16:05:55,455 INFO L78 Accepts]: Start accepts. Automaton has 45879 states and 57987 transitions. Word has length 327 [2018-09-14 16:05:55,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:05:55,456 INFO L480 AbstractCegarLoop]: Abstraction has 45879 states and 57987 transitions. [2018-09-14 16:05:55,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:05:55,456 INFO L276 IsEmpty]: Start isEmpty. Operand 45879 states and 57987 transitions. [2018-09-14 16:05:55,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2018-09-14 16:05:55,556 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:05:55,556 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 16:05:55,556 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:05:55,557 INFO L82 PathProgramCache]: Analyzing trace with hash 864215609, now seen corresponding path program 1 times [2018-09-14 16:05:55,557 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:05:55,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:55,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:55,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:55,558 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:05:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:56,199 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-14 16:05:56,453 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 175 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:05:56,454 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:05:56,454 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:05:56,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:56,680 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:05:56,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:56,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:05:56,995 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-09-14 16:05:56,995 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:05:57,186 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-09-14 16:05:57,207 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 16:05:57,208 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 11 [2018-09-14 16:05:57,208 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:05:57,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:05:57,209 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:05:57,209 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-09-14 16:05:57,209 INFO L87 Difference]: Start difference. First operand 45879 states and 57987 transitions. Second operand 5 states. [2018-09-14 16:05:58,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:05:58,874 INFO L93 Difference]: Finished difference Result 127499 states and 167080 transitions. [2018-09-14 16:05:58,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 16:05:58,874 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 352 [2018-09-14 16:05:58,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:05:59,263 INFO L225 Difference]: With dead ends: 127499 [2018-09-14 16:05:59,263 INFO L226 Difference]: Without dead ends: 81626 [2018-09-14 16:05:59,384 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 710 GetRequests, 700 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-09-14 16:05:59,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81626 states. [2018-09-14 16:06:01,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81626 to 80439. [2018-09-14 16:06:01,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80439 states. [2018-09-14 16:06:01,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80439 states to 80439 states and 101769 transitions. [2018-09-14 16:06:01,532 INFO L78 Accepts]: Start accepts. Automaton has 80439 states and 101769 transitions. Word has length 352 [2018-09-14 16:06:01,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:06:01,533 INFO L480 AbstractCegarLoop]: Abstraction has 80439 states and 101769 transitions. [2018-09-14 16:06:01,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:06:01,533 INFO L276 IsEmpty]: Start isEmpty. Operand 80439 states and 101769 transitions. [2018-09-14 16:06:01,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2018-09-14 16:06:01,696 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:06:01,697 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 16:06:01,697 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:06:01,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1472588676, now seen corresponding path program 1 times [2018-09-14 16:06:01,697 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:06:01,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:01,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:01,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:01,699 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:06:01,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:02,243 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 291 proven. 20 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-09-14 16:06:02,243 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:06:02,243 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 [2018-09-14 16:06:02,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:02,254 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:06:02,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:02,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:06:02,686 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 259 proven. 0 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2018-09-14 16:06:02,686 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:06:02,870 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 287 proven. 6 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2018-09-14 16:06:02,892 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:06:02,893 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 7 [2018-09-14 16:06:02,893 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:06:02,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:06:02,893 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:06:02,894 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:06:02,894 INFO L87 Difference]: Start difference. First operand 80439 states and 101769 transitions. Second operand 3 states. [2018-09-14 16:06:04,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:06:04,475 INFO L93 Difference]: Finished difference Result 160869 states and 203545 transitions. [2018-09-14 16:06:04,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:06:04,476 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 477 [2018-09-14 16:06:04,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:06:04,793 INFO L225 Difference]: With dead ends: 160869 [2018-09-14 16:06:04,793 INFO L226 Difference]: Without dead ends: 80436 [2018-09-14 16:06:05,752 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 958 GetRequests, 953 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:06:05,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80436 states. [2018-09-14 16:06:07,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80436 to 80435. [2018-09-14 16:06:07,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80435 states. [2018-09-14 16:06:07,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80435 states to 80435 states and 101721 transitions. [2018-09-14 16:06:07,438 INFO L78 Accepts]: Start accepts. Automaton has 80435 states and 101721 transitions. Word has length 477 [2018-09-14 16:06:07,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:06:07,439 INFO L480 AbstractCegarLoop]: Abstraction has 80435 states and 101721 transitions. [2018-09-14 16:06:07,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:06:07,439 INFO L276 IsEmpty]: Start isEmpty. Operand 80435 states and 101721 transitions. [2018-09-14 16:06:07,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2018-09-14 16:06:07,642 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:06:07,642 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-14 16:06:07,643 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:06:07,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1533573791, now seen corresponding path program 1 times [2018-09-14 16:06:07,643 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:06:07,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:07,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:07,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:07,645 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:06:07,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:08,347 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-14 16:06:08,706 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 304 proven. 121 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-09-14 16:06:08,706 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:06:08,706 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:06:08,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:08,716 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:06:09,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:09,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:06:09,384 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 425 proven. 2 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-09-14 16:06:09,384 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:06:10,319 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 425 proven. 2 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-09-14 16:06:10,341 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:06:10,342 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:06:10,358 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:10,358 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:06:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:11,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:06:11,215 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 425 proven. 2 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-09-14 16:06:11,216 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:06:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 425 proven. 2 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-09-14 16:06:11,472 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:06:11,472 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-09-14 16:06:11,473 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:06:11,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 16:06:11,474 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 16:06:11,474 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-09-14 16:06:11,475 INFO L87 Difference]: Start difference. First operand 80435 states and 101721 transitions. Second operand 9 states. [2018-09-14 16:06:22,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:06:22,417 INFO L93 Difference]: Finished difference Result 250854 states and 355855 transitions. [2018-09-14 16:06:22,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-14 16:06:22,417 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 477 [2018-09-14 16:06:22,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:06:23,508 INFO L225 Difference]: With dead ends: 250854 [2018-09-14 16:06:23,509 INFO L226 Difference]: Without dead ends: 170425 [2018-09-14 16:06:23,751 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1973 GetRequests, 1925 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=433, Invalid=1919, Unknown=0, NotChecked=0, Total=2352 [2018-09-14 16:06:23,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170425 states. [2018-09-14 16:06:28,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170425 to 160047. [2018-09-14 16:06:28,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160047 states. [2018-09-14 16:06:28,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160047 states to 160047 states and 196346 transitions. [2018-09-14 16:06:28,956 INFO L78 Accepts]: Start accepts. Automaton has 160047 states and 196346 transitions. Word has length 477 [2018-09-14 16:06:28,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:06:28,956 INFO L480 AbstractCegarLoop]: Abstraction has 160047 states and 196346 transitions. [2018-09-14 16:06:28,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 16:06:28,957 INFO L276 IsEmpty]: Start isEmpty. Operand 160047 states and 196346 transitions. [2018-09-14 16:06:29,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2018-09-14 16:06:29,309 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:06:29,310 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:06:29,310 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:06:29,310 INFO L82 PathProgramCache]: Analyzing trace with hash -2059787674, now seen corresponding path program 1 times [2018-09-14 16:06:29,311 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:06:29,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:29,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:29,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:29,312 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:06:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:30,082 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 345 proven. 33 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2018-09-14 16:06:30,082 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:06:30,083 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-14 16:06:30,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:30,094 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:06:30,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:30,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:06:30,679 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 359 proven. 2 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2018-09-14 16:06:30,680 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:06:31,657 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 345 proven. 33 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2018-09-14 16:06:31,680 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:06:31,681 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:06:31,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:31,698 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:06:32,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:32,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:06:32,662 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 359 proven. 2 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2018-09-14 16:06:32,663 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:06:32,969 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 345 proven. 33 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2018-09-14 16:06:32,972 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:06:32,973 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 8 [2018-09-14 16:06:32,973 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:06:32,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-14 16:06:32,975 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-14 16:06:32,975 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-09-14 16:06:32,975 INFO L87 Difference]: Start difference. First operand 160047 states and 196346 transitions. Second operand 7 states. [2018-09-14 16:06:40,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:06:40,276 INFO L93 Difference]: Finished difference Result 302636 states and 388968 transitions. [2018-09-14 16:06:40,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 16:06:40,277 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 486 [2018-09-14 16:06:40,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:06:40,807 INFO L225 Difference]: With dead ends: 302636 [2018-09-14 16:06:40,807 INFO L226 Difference]: Without dead ends: 143651 [2018-09-14 16:06:41,058 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1952 GetRequests, 1940 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-09-14 16:06:41,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143651 states. [2018-09-14 16:06:43,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143651 to 137208. [2018-09-14 16:06:43,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137208 states. [2018-09-14 16:06:49,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137208 states to 137208 states and 163533 transitions. [2018-09-14 16:06:49,780 INFO L78 Accepts]: Start accepts. Automaton has 137208 states and 163533 transitions. Word has length 486 [2018-09-14 16:06:49,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:06:49,781 INFO L480 AbstractCegarLoop]: Abstraction has 137208 states and 163533 transitions. [2018-09-14 16:06:49,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-14 16:06:49,781 INFO L276 IsEmpty]: Start isEmpty. Operand 137208 states and 163533 transitions. [2018-09-14 16:06:49,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2018-09-14 16:06:49,984 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:06:49,984 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:06:49,984 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:06:49,985 INFO L82 PathProgramCache]: Analyzing trace with hash -592567081, now seen corresponding path program 1 times [2018-09-14 16:06:49,985 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:06:49,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:49,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:49,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:49,986 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:06:50,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:50,496 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 325 proven. 33 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2018-09-14 16:06:50,496 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:06:50,496 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 [2018-09-14 16:06:50,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:50,505 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:06:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:50,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:06:51,175 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 357 proven. 4 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2018-09-14 16:06:51,176 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:06:51,359 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 338 proven. 33 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2018-09-14 16:06:51,383 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:06:51,383 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 [2018-09-14 16:06:51,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:51,400 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:06:52,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:52,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:06:52,284 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 357 proven. 4 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2018-09-14 16:06:52,284 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:06:52,735 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 338 proven. 33 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2018-09-14 16:06:52,738 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:06:52,739 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-09-14 16:06:52,740 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:06:52,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 16:06:52,741 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 16:06:52,741 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-09-14 16:06:52,741 INFO L87 Difference]: Start difference. First operand 137208 states and 163533 transitions. Second operand 9 states. [2018-09-14 16:07:27,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:07:27,714 INFO L93 Difference]: Finished difference Result 1116050 states and 1531857 transitions. [2018-09-14 16:07:27,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-14 16:07:27,715 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 498 [2018-09-14 16:07:27,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:07:33,188 INFO L225 Difference]: With dead ends: 1116050 [2018-09-14 16:07:33,189 INFO L226 Difference]: Without dead ends: 980139 [2018-09-14 16:07:33,823 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2052 GetRequests, 2006 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=353, Invalid=1627, Unknown=0, NotChecked=0, Total=1980 [2018-09-14 16:07:34,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980139 states. [2018-09-14 16:08:19,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980139 to 937842. [2018-09-14 16:08:19,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 937842 states. [2018-09-14 16:08:23,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937842 states to 937842 states and 1156172 transitions. [2018-09-14 16:08:23,645 INFO L78 Accepts]: Start accepts. Automaton has 937842 states and 1156172 transitions. Word has length 498 [2018-09-14 16:08:23,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:08:23,645 INFO L480 AbstractCegarLoop]: Abstraction has 937842 states and 1156172 transitions. [2018-09-14 16:08:23,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 16:08:23,646 INFO L276 IsEmpty]: Start isEmpty. Operand 937842 states and 1156172 transitions. Received shutdown request... [2018-09-14 16:08:24,442 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-14 16:08:24,447 WARN L206 ceAbstractionStarter]: Timeout [2018-09-14 16:08:24,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.09 04:08:24 BoogieIcfgContainer [2018-09-14 16:08:24,447 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-14 16:08:24,448 INFO L168 Benchmark]: Toolchain (without parser) took 210025.26 ms. Allocated memory was 1.5 GB in the beginning and 7.1 GB in the end (delta: 5.5 GB). Free memory was 1.4 GB in the beginning and 2.9 GB in the end (delta: -1.5 GB). Peak memory consumption was 5.3 GB. Max. memory is 7.1 GB. [2018-09-14 16:08:24,449 INFO L168 Benchmark]: CDTParser took 0.27 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. [2018-09-14 16:08:24,450 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1240.32 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. [2018-09-14 16:08:24,450 INFO L168 Benchmark]: Boogie Procedure Inliner took 139.61 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-09-14 16:08:24,451 INFO L168 Benchmark]: Boogie Preprocessor took 399.48 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 809.5 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -948.6 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. [2018-09-14 16:08:24,452 INFO L168 Benchmark]: RCFGBuilder took 5169.48 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: 251.6 MB). Peak memory consumption was 251.6 MB. Max. memory is 7.1 GB. [2018-09-14 16:08:24,452 INFO L168 Benchmark]: TraceAbstraction took 203068.85 ms. Allocated memory was 2.3 GB in the beginning and 7.1 GB in the end (delta: 4.7 GB). Free memory was 2.0 GB in the beginning and 2.9 GB in the end (delta: -882.8 MB). Peak memory consumption was 5.1 GB. Max. memory is 7.1 GB. [2018-09-14 16:08:24,457 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 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 1240.32 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 139.61 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 399.48 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 809.5 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -948.6 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5169.48 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: 251.6 MB). Peak memory consumption was 251.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 203068.85 ms. Allocated memory was 2.3 GB in the beginning and 7.1 GB in the end (delta: 4.7 GB). Free memory was 2.0 GB in the beginning and 2.9 GB in the end (delta: -882.8 MB). Peak memory consumption was 5.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1581]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1581). Cancelled while IsEmpty was searching accepting run (input had 937842 states). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 202.9s OverallTime, 15 OverallIterations, 6 TraceHistogramMax, 101.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 5322 SDtfs, 19153 SDslu, 9512 SDs, 0 SdLazy, 29509 SolverSat, 6209 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 41.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13693 GetRequests, 13418 SyntacticMatches, 30 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2028 ImplicationChecksByTransitivity, 10.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=937842occurred in iteration=15, 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: 71.0s AutomataMinimizationTime, 15 MinimizatonAttempts, 64684 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.2s SsaConstructionTime, 6.3s SatisfiabilityAnalysisTime, 18.2s InterpolantComputationTime, 11664 NumberOfCodeBlocks, 11664 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 18311 ConstructedInterpolants, 0 QuantifiedInterpolants, 13673862 SizeOfPredicates, 32 NumberOfNonLiveVariables, 24837 ConjunctsInSsa, 134 ConjunctsInUnsatCore, 51 InterpolantComputations, 13 PerfectInterpolantSequences, 12871/13462 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_label41_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-14_16-08-24-473.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label41_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-14_16-08-24-473.csv Completed graceful shutdown