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/Problem17_label58_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-69f5bdd-m [2018-09-18 12:18:07,409 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-18 12:18:07,412 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-18 12:18:07,429 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-18 12:18:07,430 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-18 12:18:07,431 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-18 12:18:07,432 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-18 12:18:07,434 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-18 12:18:07,435 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-18 12:18:07,436 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-18 12:18:07,437 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-18 12:18:07,438 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-18 12:18:07,439 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-18 12:18:07,439 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-18 12:18:07,440 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-18 12:18:07,441 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-18 12:18:07,442 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-18 12:18:07,444 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-18 12:18:07,446 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-18 12:18:07,448 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-18 12:18:07,449 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-18 12:18:07,450 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-18 12:18:07,453 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-18 12:18:07,453 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-18 12:18:07,453 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-18 12:18:07,456 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-18 12:18:07,458 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-18 12:18:07,458 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-18 12:18:07,459 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-18 12:18:07,464 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-18 12:18:07,464 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-18 12:18:07,465 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-18 12:18:07,465 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-18 12:18:07,467 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-18 12:18:07,469 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-18 12:18:07,470 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-18 12:18:07,471 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-18 12:18:07,500 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-18 12:18:07,501 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-18 12:18:07,502 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-18 12:18:07,502 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-18 12:18:07,502 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-18 12:18:07,502 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-18 12:18:07,505 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-18 12:18:07,505 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-18 12:18:07,505 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-18 12:18:07,506 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-18 12:18:07,506 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-09-18 12:18:07,506 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-18 12:18:07,507 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-18 12:18:07,507 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-18 12:18:07,508 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-18 12:18:07,509 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-18 12:18:07,509 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-18 12:18:07,509 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-18 12:18:07,509 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-18 12:18:07,509 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-18 12:18:07,510 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-18 12:18:07,510 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-18 12:18:07,510 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-18 12:18:07,510 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-18 12:18:07,512 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-18 12:18:07,512 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-18 12:18:07,512 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-18 12:18:07,512 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-18 12:18:07,513 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-18 12:18:07,513 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-18 12:18:07,513 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-18 12:18:07,513 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-18 12:18:07,514 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-18 12:18:07,514 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-18 12:18:07,585 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-18 12:18:07,602 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-18 12:18:07,608 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-18 12:18:07,610 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-18 12:18:07,610 INFO L276 PluginConnector]: CDTParser initialized [2018-09-18 12:18:07,611 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label58_true-unreach-call.c [2018-09-18 12:18:07,966 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ebd14537/0ed8df319a8f4b48819643438b9c7891/FLAGe97e7cd14 [2018-09-18 12:18:08,373 INFO L277 CDTParser]: Found 1 translation units. [2018-09-18 12:18:08,375 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label58_true-unreach-call.c [2018-09-18 12:18:08,397 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ebd14537/0ed8df319a8f4b48819643438b9c7891/FLAGe97e7cd14 [2018-09-18 12:18:08,415 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ebd14537/0ed8df319a8f4b48819643438b9c7891 [2018-09-18 12:18:08,427 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-18 12:18:08,430 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-18 12:18:08,432 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-18 12:18:08,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-18 12:18:08,441 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-18 12:18:08,442 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 12:18:08" (1/1) ... [2018-09-18 12:18:08,447 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ad62779 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:18:08, skipping insertion in model container [2018-09-18 12:18:08,447 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 12:18:08" (1/1) ... [2018-09-18 12:18:08,461 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-18 12:18:09,579 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 12:18:09,600 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-18 12:18:09,969 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 12:18:10,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:18:10 WrapperNode [2018-09-18 12:18:10,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-18 12:18:10,185 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-18 12:18:10,185 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-18 12:18:10,185 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-18 12:18:10,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:18:10" (1/1) ... [2018-09-18 12:18:10,278 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:18:10" (1/1) ... [2018-09-18 12:18:10,468 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-18 12:18:10,469 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-18 12:18:10,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-18 12:18:10,469 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-18 12:18:11,068 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:18:10" (1/1) ... [2018-09-18 12:18:11,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:18:10" (1/1) ... [2018-09-18 12:18:11,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:18:10" (1/1) ... [2018-09-18 12:18:11,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:18:10" (1/1) ... [2018-09-18 12:18:11,170 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:18:10" (1/1) ... [2018-09-18 12:18:11,191 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:18:10" (1/1) ... [2018-09-18 12:18:11,254 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:18:10" (1/1) ... [2018-09-18 12:18:11,291 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-18 12:18:11,292 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-18 12:18:11,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-18 12:18:11,292 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-18 12:18:11,293 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:18:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-18 12:18:11,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-18 12:18:11,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-18 12:18:11,373 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-09-18 12:18:11,373 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-09-18 12:18:11,373 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-18 12:18:11,374 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-18 12:18:11,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-18 12:18:11,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-18 12:18:11,374 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-18 12:18:11,374 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-18 12:18:23,759 INFO L356 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-18 12:18:23,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 12:18:23 BoogieIcfgContainer [2018-09-18 12:18:23,760 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-18 12:18:23,761 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-18 12:18:23,762 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-18 12:18:23,765 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-18 12:18:23,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 12:18:08" (1/3) ... [2018-09-18 12:18:23,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c51df8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 12:18:23, skipping insertion in model container [2018-09-18 12:18:23,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:18:10" (2/3) ... [2018-09-18 12:18:23,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c51df8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 12:18:23, skipping insertion in model container [2018-09-18 12:18:23,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 12:18:23" (3/3) ... [2018-09-18 12:18:23,769 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label58_true-unreach-call.c [2018-09-18 12:18:23,779 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-18 12:18:23,789 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-18 12:18:23,847 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-18 12:18:23,848 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-18 12:18:23,848 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-18 12:18:23,848 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-18 12:18:23,848 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-18 12:18:23,848 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-18 12:18:23,849 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-18 12:18:23,849 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-18 12:18:23,849 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-18 12:18:23,885 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-09-18 12:18:23,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-18 12:18:23,895 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:18:23,896 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] [2018-09-18 12:18:23,897 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:18:23,902 INFO L82 PathProgramCache]: Analyzing trace with hash -567488676, now seen corresponding path program 1 times [2018-09-18 12:18:23,905 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:18:23,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:18:23,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:18:23,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:18:23,959 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:18:24,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:18:24,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:18:24,475 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:18:24,476 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-18 12:18:24,476 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:18:24,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-18 12:18:24,498 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-18 12:18:24,498 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 12:18:24,501 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-09-18 12:18:35,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:18:35,025 INFO L93 Difference]: Finished difference Result 2162 states and 4007 transitions. [2018-09-18 12:18:35,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-18 12:18:35,027 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2018-09-18 12:18:35,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:18:35,060 INFO L225 Difference]: With dead ends: 2162 [2018-09-18 12:18:35,060 INFO L226 Difference]: Without dead ends: 1552 [2018-09-18 12:18:35,072 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 12:18:35,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2018-09-18 12:18:35,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1525. [2018-09-18 12:18:35,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1525 states. [2018-09-18 12:18:35,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 2696 transitions. [2018-09-18 12:18:35,232 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 2696 transitions. Word has length 52 [2018-09-18 12:18:35,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:18:35,233 INFO L480 AbstractCegarLoop]: Abstraction has 1525 states and 2696 transitions. [2018-09-18 12:18:35,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-18 12:18:35,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 2696 transitions. [2018-09-18 12:18:35,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-18 12:18:35,243 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:18:35,244 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:18:35,244 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:18:35,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1938169354, now seen corresponding path program 1 times [2018-09-18 12:18:35,245 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:18:35,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:18:35,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:18:35,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:18:35,246 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:18:35,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:18:35,669 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:18:35,669 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:18:35,670 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 12:18:35,670 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:18:35,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 12:18:35,672 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 12:18:35,672 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-09-18 12:18:35,673 INFO L87 Difference]: Start difference. First operand 1525 states and 2696 transitions. Second operand 6 states. [2018-09-18 12:18:57,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:18:57,789 INFO L93 Difference]: Finished difference Result 5786 states and 10682 transitions. [2018-09-18 12:18:57,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 12:18:57,790 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 131 [2018-09-18 12:18:57,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:18:57,825 INFO L225 Difference]: With dead ends: 5786 [2018-09-18 12:18:57,825 INFO L226 Difference]: Without dead ends: 4267 [2018-09-18 12:18:57,845 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-09-18 12:18:57,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4267 states. [2018-09-18 12:18:57,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4267 to 4243. [2018-09-18 12:18:57,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4243 states. [2018-09-18 12:18:58,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4243 states to 4243 states and 6361 transitions. [2018-09-18 12:18:58,006 INFO L78 Accepts]: Start accepts. Automaton has 4243 states and 6361 transitions. Word has length 131 [2018-09-18 12:18:58,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:18:58,007 INFO L480 AbstractCegarLoop]: Abstraction has 4243 states and 6361 transitions. [2018-09-18 12:18:58,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 12:18:58,007 INFO L276 IsEmpty]: Start isEmpty. Operand 4243 states and 6361 transitions. [2018-09-18 12:18:58,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-18 12:18:58,017 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:18:58,018 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:18:58,018 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:18:58,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1881840966, now seen corresponding path program 1 times [2018-09-18 12:18:58,019 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:18:58,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:18:58,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:18:58,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:18:58,021 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:18:58,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:18:58,331 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 12:18:58,379 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:18:58,379 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:18:58,379 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 12:18:58,380 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:18:58,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 12:18:58,381 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 12:18:58,381 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-18 12:18:58,381 INFO L87 Difference]: Start difference. First operand 4243 states and 6361 transitions. Second operand 6 states. [2018-09-18 12:19:04,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:19:04,863 INFO L93 Difference]: Finished difference Result 12712 states and 20702 transitions. [2018-09-18 12:19:04,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 12:19:04,865 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 132 [2018-09-18 12:19:04,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:19:04,920 INFO L225 Difference]: With dead ends: 12712 [2018-09-18 12:19:04,920 INFO L226 Difference]: Without dead ends: 8475 [2018-09-18 12:19:04,942 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-18 12:19:04,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8475 states. [2018-09-18 12:19:05,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8475 to 8390. [2018-09-18 12:19:05,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8390 states. [2018-09-18 12:19:05,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8390 states to 8390 states and 12580 transitions. [2018-09-18 12:19:05,209 INFO L78 Accepts]: Start accepts. Automaton has 8390 states and 12580 transitions. Word has length 132 [2018-09-18 12:19:05,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:19:05,209 INFO L480 AbstractCegarLoop]: Abstraction has 8390 states and 12580 transitions. [2018-09-18 12:19:05,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 12:19:05,210 INFO L276 IsEmpty]: Start isEmpty. Operand 8390 states and 12580 transitions. [2018-09-18 12:19:05,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-18 12:19:05,214 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:19:05,215 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 12:19:05,215 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:19:05,215 INFO L82 PathProgramCache]: Analyzing trace with hash -502912620, now seen corresponding path program 1 times [2018-09-18 12:19:05,215 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:19:05,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:19:05,216 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:19:05,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:19:05,217 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:19:05,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:19:05,542 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 91 proven. 5 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-09-18 12:19:05,542 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:19:05,543 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:19:05,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:19:05,559 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:19:05,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:19:05,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:19:06,084 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:19:06,084 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:19:06,334 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-18 12:19:06,712 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:19:06,750 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:19:06,751 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 3 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 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:19:06,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:19:06,786 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:19:06,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:19:06,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:19:07,269 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-18 12:19:07,270 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:19:07,625 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-18 12:19:07,627 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 3 imperfect interpolant sequences. [2018-09-18 12:19:07,628 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6, 5, 5] total 13 [2018-09-18 12:19:07,628 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:19:07,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 12:19:07,629 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 12:19:07,630 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-09-18 12:19:07,631 INFO L87 Difference]: Start difference. First operand 8390 states and 12580 transitions. Second operand 5 states. [2018-09-18 12:19:13,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:19:13,556 INFO L93 Difference]: Finished difference Result 20857 states and 31936 transitions. [2018-09-18 12:19:13,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-18 12:19:13,557 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 206 [2018-09-18 12:19:13,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:19:13,657 INFO L225 Difference]: With dead ends: 20857 [2018-09-18 12:19:13,658 INFO L226 Difference]: Without dead ends: 12438 [2018-09-18 12:19:13,721 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 813 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2018-09-18 12:19:13,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12438 states. [2018-09-18 12:19:14,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12438 to 12428. [2018-09-18 12:19:14,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12428 states. [2018-09-18 12:19:14,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12428 states to 12428 states and 17256 transitions. [2018-09-18 12:19:14,079 INFO L78 Accepts]: Start accepts. Automaton has 12428 states and 17256 transitions. Word has length 206 [2018-09-18 12:19:14,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:19:14,080 INFO L480 AbstractCegarLoop]: Abstraction has 12428 states and 17256 transitions. [2018-09-18 12:19:14,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 12:19:14,080 INFO L276 IsEmpty]: Start isEmpty. Operand 12428 states and 17256 transitions. [2018-09-18 12:19:14,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-09-18 12:19:14,087 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:19:14,087 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 12:19:14,087 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:19:14,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1533263748, now seen corresponding path program 1 times [2018-09-18 12:19:14,088 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:19:14,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:19:14,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:19:14,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:19:14,089 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:19:14,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:19:14,462 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-09-18 12:19:14,463 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:19:14,463 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-18 12:19:14,463 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:19:14,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-18 12:19:14,464 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-18 12:19:14,464 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 12:19:14,465 INFO L87 Difference]: Start difference. First operand 12428 states and 17256 transitions. Second operand 4 states. [2018-09-18 12:19:23,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:19:23,253 INFO L93 Difference]: Finished difference Result 32876 states and 49893 transitions. [2018-09-18 12:19:23,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-18 12:19:23,254 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 219 [2018-09-18 12:19:23,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:19:23,326 INFO L225 Difference]: With dead ends: 32876 [2018-09-18 12:19:23,326 INFO L226 Difference]: Without dead ends: 16401 [2018-09-18 12:19:23,408 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 12:19:23,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16401 states. [2018-09-18 12:19:23,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16401 to 13695. [2018-09-18 12:19:23,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13695 states. [2018-09-18 12:19:23,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13695 states to 13695 states and 17986 transitions. [2018-09-18 12:19:23,998 INFO L78 Accepts]: Start accepts. Automaton has 13695 states and 17986 transitions. Word has length 219 [2018-09-18 12:19:23,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:19:23,999 INFO L480 AbstractCegarLoop]: Abstraction has 13695 states and 17986 transitions. [2018-09-18 12:19:23,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-18 12:19:23,999 INFO L276 IsEmpty]: Start isEmpty. Operand 13695 states and 17986 transitions. [2018-09-18 12:19:24,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2018-09-18 12:19:24,010 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:19:24,011 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 12:19:24,011 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:19:24,011 INFO L82 PathProgramCache]: Analyzing trace with hash -562860899, now seen corresponding path program 1 times [2018-09-18 12:19:24,012 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:19:24,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:19:24,012 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:19:24,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:19:24,013 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:19:24,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:19:24,433 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 12:19:25,294 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 118 proven. 53 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-18 12:19:25,295 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:19:25,295 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:19:25,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:19:25,308 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:19:25,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:19:25,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:19:25,667 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-09-18 12:19:25,668 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:19:26,250 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-09-18 12:19:26,291 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 12:19:26,292 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-09-18 12:19:26,292 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:19:26,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 12:19:26,293 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 12:19:26,293 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-09-18 12:19:26,295 INFO L87 Difference]: Start difference. First operand 13695 states and 17986 transitions. Second operand 3 states. [2018-09-18 12:19:30,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:19:30,543 INFO L93 Difference]: Finished difference Result 27384 states and 35990 transitions. [2018-09-18 12:19:30,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 12:19:30,544 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 331 [2018-09-18 12:19:30,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:19:30,606 INFO L225 Difference]: With dead ends: 27384 [2018-09-18 12:19:30,607 INFO L226 Difference]: Without dead ends: 13695 [2018-09-18 12:19:30,630 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 662 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-09-18 12:19:30,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13695 states. [2018-09-18 12:19:30,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13695 to 13695. [2018-09-18 12:19:30,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13695 states. [2018-09-18 12:19:30,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13695 states to 13695 states and 17678 transitions. [2018-09-18 12:19:30,923 INFO L78 Accepts]: Start accepts. Automaton has 13695 states and 17678 transitions. Word has length 331 [2018-09-18 12:19:30,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:19:30,923 INFO L480 AbstractCegarLoop]: Abstraction has 13695 states and 17678 transitions. [2018-09-18 12:19:30,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 12:19:30,924 INFO L276 IsEmpty]: Start isEmpty. Operand 13695 states and 17678 transitions. [2018-09-18 12:19:30,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2018-09-18 12:19:30,937 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:19:30,938 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:19:30,938 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:19:30,938 INFO L82 PathProgramCache]: Analyzing trace with hash 897107937, now seen corresponding path program 1 times [2018-09-18 12:19:30,938 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:19:30,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:19:30,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:19:30,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:19:30,940 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:19:31,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:19:31,925 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 311 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-09-18 12:19:31,925 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:19:31,925 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:19:31,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:19:31,939 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:19:32,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:19:32,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:19:32,297 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 311 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-09-18 12:19:32,298 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:19:32,456 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-18 12:19:33,116 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 311 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-09-18 12:19:33,138 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:19:33,138 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:19:33,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:19:33,155 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:19:33,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:19:33,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:19:33,510 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 311 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-09-18 12:19:33,511 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:19:33,761 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 311 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-09-18 12:19:33,764 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:19:33,764 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 9 [2018-09-18 12:19:33,764 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:19:33,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-18 12:19:33,765 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-18 12:19:33,765 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-09-18 12:19:33,765 INFO L87 Difference]: Start difference. First operand 13695 states and 17678 transitions. Second operand 7 states. [2018-09-18 12:19:50,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:19:50,884 INFO L93 Difference]: Finished difference Result 48461 states and 67618 transitions. [2018-09-18 12:19:50,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-18 12:19:50,884 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 356 [2018-09-18 12:19:50,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:19:51,005 INFO L225 Difference]: With dead ends: 48461 [2018-09-18 12:19:51,006 INFO L226 Difference]: Without dead ends: 32091 [2018-09-18 12:19:51,050 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1440 GetRequests, 1425 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-09-18 12:19:51,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32091 states. [2018-09-18 12:19:51,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32091 to 31489. [2018-09-18 12:19:51,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31489 states. [2018-09-18 12:19:51,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31489 states to 31489 states and 39913 transitions. [2018-09-18 12:19:51,644 INFO L78 Accepts]: Start accepts. Automaton has 31489 states and 39913 transitions. Word has length 356 [2018-09-18 12:19:51,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:19:51,645 INFO L480 AbstractCegarLoop]: Abstraction has 31489 states and 39913 transitions. [2018-09-18 12:19:51,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-18 12:19:51,645 INFO L276 IsEmpty]: Start isEmpty. Operand 31489 states and 39913 transitions. [2018-09-18 12:19:51,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2018-09-18 12:19:51,660 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:19:51,661 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:19:51,661 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:19:51,661 INFO L82 PathProgramCache]: Analyzing trace with hash -337293599, now seen corresponding path program 1 times [2018-09-18 12:19:51,662 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:19:51,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:19:51,663 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:19:51,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:19:51,663 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:19:51,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:19:52,126 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2018-09-18 12:19:52,127 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:19:52,127 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-18 12:19:52,127 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:19:52,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-18 12:19:52,128 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-18 12:19:52,128 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 12:19:52,129 INFO L87 Difference]: Start difference. First operand 31489 states and 39913 transitions. Second operand 4 states. [2018-09-18 12:19:58,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:19:58,606 INFO L93 Difference]: Finished difference Result 82194 states and 105512 transitions. [2018-09-18 12:19:58,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-18 12:19:58,607 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 379 [2018-09-18 12:19:58,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:19:58,734 INFO L225 Difference]: With dead ends: 82194 [2018-09-18 12:19:58,734 INFO L226 Difference]: Without dead ends: 42650 [2018-09-18 12:19:58,803 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 12:19:58,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42650 states. [2018-09-18 12:19:59,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42650 to 40011. [2018-09-18 12:19:59,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40011 states. [2018-09-18 12:19:59,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40011 states to 40011 states and 49922 transitions. [2018-09-18 12:19:59,434 INFO L78 Accepts]: Start accepts. Automaton has 40011 states and 49922 transitions. Word has length 379 [2018-09-18 12:19:59,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:19:59,434 INFO L480 AbstractCegarLoop]: Abstraction has 40011 states and 49922 transitions. [2018-09-18 12:19:59,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-18 12:19:59,435 INFO L276 IsEmpty]: Start isEmpty. Operand 40011 states and 49922 transitions. [2018-09-18 12:19:59,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2018-09-18 12:19:59,474 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:19:59,475 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:19:59,475 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:19:59,476 INFO L82 PathProgramCache]: Analyzing trace with hash 464321774, now seen corresponding path program 1 times [2018-09-18 12:19:59,476 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:19:59,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:19:59,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:19:59,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:19:59,477 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:19:59,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:20:00,818 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 22 proven. 134 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2018-09-18 12:20:00,818 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:20:00,818 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:20:00,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:20:00,826 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:20:00,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:20:00,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:20:05,667 WARN L178 SmtUtils]: Spent 4.28 s on a formula simplification. DAG size of input: 48 DAG size of output: 21 [2018-09-18 12:20:07,490 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 176 proven. 134 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-09-18 12:20:07,490 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:20:08,468 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2018-09-18 12:20:08,789 WARN L178 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2018-09-18 12:20:10,159 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 92 proven. 291 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:20:10,180 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:20:10,180 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:20:10,200 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:20:10,200 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:20:10,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:20:10,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:20:12,690 WARN L178 SmtUtils]: Spent 2.01 s on a formula simplification. DAG size of input: 42 DAG size of output: 17 [2018-09-18 12:20:12,944 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 22 proven. 134 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2018-09-18 12:20:12,944 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:20:13,468 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-09-18 12:20:13,590 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-09-18 12:20:21,277 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 104 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:20:21,280 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:20:21,280 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 13, 10, 12] total 40 [2018-09-18 12:20:21,281 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:20:21,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-18 12:20:21,283 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-18 12:20:21,284 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=1161, Unknown=3, NotChecked=0, Total=1560 [2018-09-18 12:20:21,284 INFO L87 Difference]: Start difference. First operand 40011 states and 49922 transitions. Second operand 20 states. [2018-09-18 12:21:07,641 WARN L178 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 46 [2018-09-18 12:21:20,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:21:20,083 INFO L93 Difference]: Finished difference Result 136670 states and 182548 transitions. [2018-09-18 12:21:20,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-18 12:21:20,084 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 545 [2018-09-18 12:21:20,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:21:20,611 INFO L225 Difference]: With dead ends: 136670 [2018-09-18 12:21:20,611 INFO L226 Difference]: Without dead ends: 96175 [2018-09-18 12:21:20,705 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2238 GetRequests, 2152 SyntacticMatches, 5 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2106 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=1749, Invalid=5054, Unknown=3, NotChecked=0, Total=6806 [2018-09-18 12:21:20,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96175 states. [2018-09-18 12:21:23,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96175 to 88932. [2018-09-18 12:21:23,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88932 states. [2018-09-18 12:21:23,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88932 states to 88932 states and 119090 transitions. [2018-09-18 12:21:23,836 INFO L78 Accepts]: Start accepts. Automaton has 88932 states and 119090 transitions. Word has length 545 [2018-09-18 12:21:23,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:21:23,837 INFO L480 AbstractCegarLoop]: Abstraction has 88932 states and 119090 transitions. [2018-09-18 12:21:23,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-18 12:21:23,838 INFO L276 IsEmpty]: Start isEmpty. Operand 88932 states and 119090 transitions. [2018-09-18 12:21:23,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 693 [2018-09-18 12:21:23,931 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:21:23,931 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:21:23,932 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:21:23,932 INFO L82 PathProgramCache]: Analyzing trace with hash 852935569, now seen corresponding path program 1 times [2018-09-18 12:21:23,932 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:21:23,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:21:23,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:21:23,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:21:23,934 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:21:24,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:21:24,770 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 196 proven. 2 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2018-09-18 12:21:24,770 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:21:24,771 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:21:24,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:21:24,788 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:21:24,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:21:24,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:21:25,236 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 378 proven. 0 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2018-09-18 12:21:25,236 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:21:26,318 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 196 proven. 2 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2018-09-18 12:21:26,344 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 12:21:26,345 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 3 [2018-09-18 12:21:26,345 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:21:26,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 12:21:26,346 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 12:21:26,346 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 12:21:26,346 INFO L87 Difference]: Start difference. First operand 88932 states and 119090 transitions. Second operand 3 states. [2018-09-18 12:21:33,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:21:33,919 INFO L93 Difference]: Finished difference Result 180832 states and 243287 transitions. [2018-09-18 12:21:33,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 12:21:33,920 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 692 [2018-09-18 12:21:33,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:21:34,399 INFO L225 Difference]: With dead ends: 180832 [2018-09-18 12:21:34,400 INFO L226 Difference]: Without dead ends: 94094 [2018-09-18 12:21:34,613 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1386 GetRequests, 1385 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 12:21:34,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94094 states. [2018-09-18 12:21:36,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94094 to 94084. [2018-09-18 12:21:36,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94084 states. [2018-09-18 12:21:36,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94084 states to 94084 states and 123651 transitions. [2018-09-18 12:21:37,000 INFO L78 Accepts]: Start accepts. Automaton has 94084 states and 123651 transitions. Word has length 692 [2018-09-18 12:21:37,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:21:37,001 INFO L480 AbstractCegarLoop]: Abstraction has 94084 states and 123651 transitions. [2018-09-18 12:21:37,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 12:21:37,002 INFO L276 IsEmpty]: Start isEmpty. Operand 94084 states and 123651 transitions. [2018-09-18 12:21:37,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 719 [2018-09-18 12:21:37,112 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:21:37,113 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:21:37,113 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:21:37,114 INFO L82 PathProgramCache]: Analyzing trace with hash -234565824, now seen corresponding path program 1 times [2018-09-18 12:21:37,114 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:21:37,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:21:37,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:21:37,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:21:37,115 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:21:38,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:21:39,133 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-18 12:21:39,468 WARN L178 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-09-18 12:21:39,961 WARN L178 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 7 [2018-09-18 12:21:40,391 WARN L178 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2018-09-18 12:21:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 192 proven. 349 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2018-09-18 12:21:41,142 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:21:41,142 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:21:41,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:21:41,151 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:21:41,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:21:41,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:21:43,252 WARN L178 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 319 DAG size of output: 39 [2018-09-18 12:21:43,739 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 424 proven. 2 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-09-18 12:21:43,739 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:21:43,935 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2018-09-18 12:21:45,599 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 424 proven. 2 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-09-18 12:21:45,620 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:21:45,620 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:21:45,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:21:45,636 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:21:46,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:21:46,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-09-18 12:21:58,357 WARN L186 SmtUtils]: Removed 30 from assertion stack [2018-09-18 12:21:58,357 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-18 12:21:58,558 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:21:58,559 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-18 12:21:58,564 WARN L206 ceAbstractionStarter]: Timeout [2018-09-18 12:21:58,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.09 12:21:58 BoogieIcfgContainer [2018-09-18 12:21:58,565 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-18 12:21:58,565 INFO L168 Benchmark]: Toolchain (without parser) took 230138.30 ms. Allocated memory was 1.5 GB in the beginning and 3.8 GB in the end (delta: 2.2 GB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -793.3 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-09-18 12:21:58,567 INFO L168 Benchmark]: CDTParser took 0.39 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-18 12:21:58,567 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1752.37 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 179.7 MB). Peak memory consumption was 179.7 MB. Max. memory is 7.1 GB. [2018-09-18 12:21:58,568 INFO L168 Benchmark]: Boogie Procedure Inliner took 283.98 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-09-18 12:21:58,569 INFO L168 Benchmark]: Boogie Preprocessor took 822.73 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 944.2 MB). Free memory was 1.2 GB in the beginning and 2.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 123.6 MB. Max. memory is 7.1 GB. [2018-09-18 12:21:58,570 INFO L168 Benchmark]: RCFGBuilder took 12468.50 ms. Allocated memory is still 2.5 GB. Free memory was 2.4 GB in the beginning and 1.9 GB in the end (delta: 456.5 MB). Peak memory consumption was 456.5 MB. Max. memory is 7.1 GB. [2018-09-18 12:21:58,570 INFO L168 Benchmark]: TraceAbstraction took 214803.29 ms. Allocated memory was 2.5 GB in the beginning and 3.8 GB in the end (delta: 1.3 GB). Free memory was 1.9 GB in the beginning and 2.2 GB in the end (delta: -314.6 MB). Peak memory consumption was 967.3 MB. Max. memory is 7.1 GB. [2018-09-18 12:21:58,578 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39 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 1752.37 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 179.7 MB). Peak memory consumption was 179.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 283.98 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 822.73 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 944.2 MB). Free memory was 1.2 GB in the beginning and 2.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 123.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 12468.50 ms. Allocated memory is still 2.5 GB. Free memory was 2.4 GB in the beginning and 1.9 GB in the end (delta: 456.5 MB). Peak memory consumption was 456.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 214803.29 ms. Allocated memory was 2.5 GB in the beginning and 3.8 GB in the end (delta: 1.3 GB). Free memory was 1.9 GB in the beginning and 2.2 GB in the end (delta: -314.6 MB). Peak memory consumption was 967.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 143]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 143). Cancelled while BasicCegarLoop was analyzing trace of length 719 with TraceHistMax 5, while TraceCheckSpWp was constructing forward predicates, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 176. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 214.7s OverallTime, 11 OverallIterations, 5 TraceHistogramMax, 150.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3783 SDtfs, 22567 SDslu, 2580 SDs, 0 SdLazy, 36905 SolverSat, 9965 SolverUnsat, 12 SolverUnknown, 0 SolverNotchecked, 129.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6603 GetRequests, 6452 SyntacticMatches, 20 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2216 ImplicationChecksByTransitivity, 23.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94084occurred in iteration=10, 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: 8.5s AutomataMinimizationTime, 10 MinimizatonAttempts, 13346 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 30.1s InterpolantComputationTime, 6280 NumberOfCodeBlocks, 6280 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 9491 ConstructedInterpolants, 236 QuantifiedInterpolants, 16843130 SizeOfPredicates, 22 NumberOfNonLiveVariables, 5085 ConjunctsInSsa, 76 ConjunctsInUnsatCore, 26 InterpolantComputations, 10 PerfectInterpolantSequences, 7009/8057 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/Problem17_label58_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-18_12-21-58-600.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem17_label58_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-18_12-21-58-600.csv Completed graceful shutdown