java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label20_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dace188-m [2018-09-14 16:03:26,526 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-14 16:03:26,529 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-14 16:03:26,548 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-14 16:03:26,549 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-14 16:03:26,550 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-14 16:03:26,552 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-14 16:03:26,554 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-14 16:03:26,561 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-14 16:03:26,562 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-14 16:03:26,563 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-14 16:03:26,564 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-14 16:03:26,564 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-14 16:03:26,567 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-14 16:03:26,569 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-14 16:03:26,572 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-14 16:03:26,574 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-14 16:03:26,578 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-14 16:03:26,581 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-14 16:03:26,590 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-14 16:03:26,594 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-14 16:03:26,596 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-14 16:03:26,601 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-14 16:03:26,601 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-14 16:03:26,601 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-14 16:03:26,604 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-14 16:03:26,605 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-14 16:03:26,605 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-14 16:03:26,606 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-14 16:03:26,607 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-14 16:03:26,607 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-14 16:03:26,610 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-14 16:03:26,610 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-14 16:03:26,610 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-14 16:03:26,613 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-14 16:03:26,613 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-14 16:03:26,614 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-14 16:03:26,631 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-14 16:03:26,631 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-14 16:03:26,632 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-14 16:03:26,632 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-14 16:03:26,632 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-14 16:03:26,632 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-14 16:03:26,633 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-14 16:03:26,633 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-14 16:03:26,633 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-14 16:03:26,633 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-14 16:03:26,633 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-14 16:03:26,634 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-14 16:03:26,634 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-14 16:03:26,634 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-14 16:03:26,635 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-14 16:03:26,635 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-14 16:03:26,635 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-14 16:03:26,635 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-14 16:03:26,636 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-14 16:03:26,636 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-14 16:03:26,636 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-14 16:03:26,636 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-14 16:03:26,636 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-14 16:03:26,637 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 16:03:26,637 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-14 16:03:26,637 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-14 16:03:26,637 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-14 16:03:26,638 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-14 16:03:26,638 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-14 16:03:26,638 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-14 16:03:26,638 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-14 16:03:26,638 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-14 16:03:26,639 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-14 16:03:26,683 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-14 16:03:26,695 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-14 16:03:26,699 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-14 16:03:26,701 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-14 16:03:26,701 INFO L276 PluginConnector]: CDTParser initialized [2018-09-14 16:03:26,702 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label20_true-unreach-call.c [2018-09-14 16:03:27,053 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/096be13b6/29cb4b298f814a78a4b948d43fb61091/FLAG4a84dc6b8 [2018-09-14 16:03:27,450 INFO L277 CDTParser]: Found 1 translation units. [2018-09-14 16:03:27,452 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label20_true-unreach-call.c [2018-09-14 16:03:27,470 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/096be13b6/29cb4b298f814a78a4b948d43fb61091/FLAG4a84dc6b8 [2018-09-14 16:03:27,488 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/096be13b6/29cb4b298f814a78a4b948d43fb61091 [2018-09-14 16:03:27,499 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-14 16:03:27,502 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-14 16:03:27,504 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-14 16:03:27,504 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-14 16:03:27,510 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-14 16:03:27,511 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 04:03:27" (1/1) ... [2018-09-14 16:03:27,517 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@201dfe03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:27, skipping insertion in model container [2018-09-14 16:03:27,517 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 04:03:27" (1/1) ... [2018-09-14 16:03:27,529 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-14 16:03:28,270 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 16:03:28,294 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-14 16:03:28,536 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 16:03:28,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:28 WrapperNode [2018-09-14 16:03:28,612 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-14 16:03:28,613 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-14 16:03:28,614 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-14 16:03:28,614 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-14 16:03:28,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:28" (1/1) ... [2018-09-14 16:03:28,673 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:28" (1/1) ... [2018-09-14 16:03:28,774 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-14 16:03:28,774 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-14 16:03:28,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-14 16:03:28,775 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-14 16:03:29,039 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:28" (1/1) ... [2018-09-14 16:03:29,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:28" (1/1) ... [2018-09-14 16:03:29,046 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:28" (1/1) ... [2018-09-14 16:03:29,047 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:28" (1/1) ... [2018-09-14 16:03:29,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:28" (1/1) ... [2018-09-14 16:03:29,115 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:28" (1/1) ... [2018-09-14 16:03:29,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:28" (1/1) ... [2018-09-14 16:03:29,136 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-14 16:03:29,137 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-14 16:03:29,137 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-14 16:03:29,137 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-14 16:03:29,138 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 16:03:29,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-14 16:03:29,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-14 16:03:29,216 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-14 16:03:29,216 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-14 16:03:29,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-14 16:03:29,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-14 16:03:29,216 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-14 16:03:29,216 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-14 16:03:33,693 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-14 16:03:33,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 04:03:33 BoogieIcfgContainer [2018-09-14 16:03:33,694 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-14 16:03:33,695 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-14 16:03:33,695 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-14 16:03:33,698 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-14 16:03:33,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 04:03:27" (1/3) ... [2018-09-14 16:03:33,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544d6bc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 04:03:33, skipping insertion in model container [2018-09-14 16:03:33,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:28" (2/3) ... [2018-09-14 16:03:33,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544d6bc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 04:03:33, skipping insertion in model container [2018-09-14 16:03:33,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 04:03:33" (3/3) ... [2018-09-14 16:03:33,702 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label20_true-unreach-call.c [2018-09-14 16:03:33,710 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-14 16:03:33,719 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-14 16:03:33,782 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-14 16:03:33,783 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-14 16:03:33,783 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-14 16:03:33,783 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-14 16:03:33,783 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-14 16:03:33,783 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-14 16:03:33,784 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-14 16:03:33,784 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-14 16:03:33,784 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-14 16:03:33,819 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-09-14 16:03:33,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-14 16:03:33,840 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:03:33,841 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:03:33,842 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:03:33,848 INFO L82 PathProgramCache]: Analyzing trace with hash -775720303, now seen corresponding path program 1 times [2018-09-14 16:03:33,851 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:03:33,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:33,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:33,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:33,902 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:03:34,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:34,775 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 16:03:34,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:03:34,951 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:03:34,952 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 16:03:34,952 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:03:34,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:03:34,975 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:03:34,976 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:03:34,980 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-09-14 16:03:37,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:03:37,301 INFO L93 Difference]: Finished difference Result 838 states and 1479 transitions. [2018-09-14 16:03:37,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:03:37,303 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 202 [2018-09-14 16:03:37,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:03:37,327 INFO L225 Difference]: With dead ends: 838 [2018-09-14 16:03:37,327 INFO L226 Difference]: Without dead ends: 524 [2018-09-14 16:03:37,335 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:03:37,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2018-09-14 16:03:37,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 522. [2018-09-14 16:03:37,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2018-09-14 16:03:37,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 890 transitions. [2018-09-14 16:03:37,469 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 890 transitions. Word has length 202 [2018-09-14 16:03:37,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:03:37,471 INFO L480 AbstractCegarLoop]: Abstraction has 522 states and 890 transitions. [2018-09-14 16:03:37,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:03:37,471 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 890 transitions. [2018-09-14 16:03:37,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-14 16:03:37,494 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:03:37,495 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:03:37,496 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:03:37,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1755738424, now seen corresponding path program 1 times [2018-09-14 16:03:37,496 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:03:37,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:37,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:37,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:37,501 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:03:37,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:37,951 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:03:37,952 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:03:37,952 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 16:03:37,952 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:03:37,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:03:37,954 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:03:37,955 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 16:03:37,955 INFO L87 Difference]: Start difference. First operand 522 states and 890 transitions. Second operand 6 states. [2018-09-14 16:03:41,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:03:41,603 INFO L93 Difference]: Finished difference Result 1581 states and 2759 transitions. [2018-09-14 16:03:41,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-14 16:03:41,607 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 212 [2018-09-14 16:03:41,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:03:41,619 INFO L225 Difference]: With dead ends: 1581 [2018-09-14 16:03:41,619 INFO L226 Difference]: Without dead ends: 1065 [2018-09-14 16:03:41,624 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-14 16:03:41,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2018-09-14 16:03:41,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1023. [2018-09-14 16:03:41,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1023 states. [2018-09-14 16:03:41,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1733 transitions. [2018-09-14 16:03:41,683 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1733 transitions. Word has length 212 [2018-09-14 16:03:41,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:03:41,683 INFO L480 AbstractCegarLoop]: Abstraction has 1023 states and 1733 transitions. [2018-09-14 16:03:41,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:03:41,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1733 transitions. [2018-09-14 16:03:41,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-09-14 16:03:41,689 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:03:41,689 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:03:41,690 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:03:41,690 INFO L82 PathProgramCache]: Analyzing trace with hash -548370667, now seen corresponding path program 1 times [2018-09-14 16:03:41,691 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:03:41,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:41,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:41,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:41,692 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:03:41,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:41,978 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:03:41,979 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:03:41,980 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 16:03:41,980 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:03:41,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:03:41,981 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:03:41,981 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:03:41,981 INFO L87 Difference]: Start difference. First operand 1023 states and 1733 transitions. Second operand 3 states. [2018-09-14 16:03:44,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:03:44,689 INFO L93 Difference]: Finished difference Result 2903 states and 5102 transitions. [2018-09-14 16:03:44,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:03:44,692 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 215 [2018-09-14 16:03:44,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:03:44,711 INFO L225 Difference]: With dead ends: 2903 [2018-09-14 16:03:44,711 INFO L226 Difference]: Without dead ends: 1886 [2018-09-14 16:03:44,716 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:03:44,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1886 states. [2018-09-14 16:03:44,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1886 to 1866. [2018-09-14 16:03:44,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1866 states. [2018-09-14 16:03:44,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 3136 transitions. [2018-09-14 16:03:44,780 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 3136 transitions. Word has length 215 [2018-09-14 16:03:44,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:03:44,781 INFO L480 AbstractCegarLoop]: Abstraction has 1866 states and 3136 transitions. [2018-09-14 16:03:44,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:03:44,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 3136 transitions. [2018-09-14 16:03:44,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-09-14 16:03:44,790 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:03:44,791 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:03:44,791 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:03:44,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1747135276, now seen corresponding path program 1 times [2018-09-14 16:03:44,792 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:03:44,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:44,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:44,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:44,793 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:03:44,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:45,168 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:03:45,168 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:03:45,168 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:03:45,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:45,177 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:03:45,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:45,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:03:45,606 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:03:45,607 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:03:46,192 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:03:46,227 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 16:03:46,227 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-14 16:03:46,228 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:03:46,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:03:46,229 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:03:46,229 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:03:46,230 INFO L87 Difference]: Start difference. First operand 1866 states and 3136 transitions. Second operand 3 states. [2018-09-14 16:03:49,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:03:49,428 INFO L93 Difference]: Finished difference Result 5475 states and 9460 transitions. [2018-09-14 16:03:49,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:03:49,434 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2018-09-14 16:03:49,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:03:49,456 INFO L225 Difference]: With dead ends: 5475 [2018-09-14 16:03:49,456 INFO L226 Difference]: Without dead ends: 3615 [2018-09-14 16:03:49,464 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 464 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:03:49,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3615 states. [2018-09-14 16:03:49,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3615 to 3613. [2018-09-14 16:03:49,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3613 states. [2018-09-14 16:03:49,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 5793 transitions. [2018-09-14 16:03:49,596 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 5793 transitions. Word has length 233 [2018-09-14 16:03:49,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:03:49,598 INFO L480 AbstractCegarLoop]: Abstraction has 3613 states and 5793 transitions. [2018-09-14 16:03:49,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:03:49,598 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 5793 transitions. [2018-09-14 16:03:49,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2018-09-14 16:03:49,615 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:03:49,615 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:03:49,615 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:03:49,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1944902010, now seen corresponding path program 1 times [2018-09-14 16:03:49,616 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:03:49,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:49,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:49,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:49,617 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:03:49,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:49,928 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 60 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:03:49,928 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:03:49,928 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:03:49,940 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:49,940 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:03:50,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:50,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:03:50,246 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-09-14 16:03:50,247 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:03:50,792 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 49 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:03:50,814 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:03:50,814 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-09-14 16:03:50,814 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:03:50,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:03:50,815 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:03:50,815 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-09-14 16:03:50,816 INFO L87 Difference]: Start difference. First operand 3613 states and 5793 transitions. Second operand 5 states. [2018-09-14 16:03:53,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:03:53,576 INFO L93 Difference]: Finished difference Result 11684 states and 19732 transitions. [2018-09-14 16:03:53,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 16:03:53,577 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 259 [2018-09-14 16:03:53,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:03:53,632 INFO L225 Difference]: With dead ends: 11684 [2018-09-14 16:03:53,632 INFO L226 Difference]: Without dead ends: 8077 [2018-09-14 16:03:53,656 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 515 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-09-14 16:03:53,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8077 states. [2018-09-14 16:03:53,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8077 to 7959. [2018-09-14 16:03:53,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7959 states. [2018-09-14 16:03:53,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7959 states to 7959 states and 12587 transitions. [2018-09-14 16:03:53,903 INFO L78 Accepts]: Start accepts. Automaton has 7959 states and 12587 transitions. Word has length 259 [2018-09-14 16:03:53,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:03:53,904 INFO L480 AbstractCegarLoop]: Abstraction has 7959 states and 12587 transitions. [2018-09-14 16:03:53,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:03:53,904 INFO L276 IsEmpty]: Start isEmpty. Operand 7959 states and 12587 transitions. [2018-09-14 16:03:53,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-09-14 16:03:53,940 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:03:53,940 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:03:53,941 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:03:53,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1659653317, now seen corresponding path program 1 times [2018-09-14 16:03:53,941 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:03:53,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:53,942 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:53,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:53,943 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:03:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:54,381 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:03:54,381 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:03:54,382 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:03:54,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:54,478 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:03:54,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:54,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:03:54,802 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:03:54,803 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:03:55,263 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:03:55,295 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:03:55,295 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:03:55,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:55,317 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:03:55,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:55,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:03:56,027 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 59 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:03:56,028 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:03:56,330 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:03:56,333 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:03:56,334 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 5] total 9 [2018-09-14 16:03:56,334 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:03:56,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:03:56,335 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:03:56,335 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-09-14 16:03:56,335 INFO L87 Difference]: Start difference. First operand 7959 states and 12587 transitions. Second operand 6 states. [2018-09-14 16:04:00,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:04:00,068 INFO L93 Difference]: Finished difference Result 27705 states and 50612 transitions. [2018-09-14 16:04:00,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 16:04:00,078 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 268 [2018-09-14 16:04:00,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:04:00,347 INFO L225 Difference]: With dead ends: 27705 [2018-09-14 16:04:00,347 INFO L226 Difference]: Without dead ends: 19752 [2018-09-14 16:04:00,405 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1082 GetRequests, 1068 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-09-14 16:04:00,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19752 states. [2018-09-14 16:04:00,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19752 to 19229. [2018-09-14 16:04:00,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19229 states. [2018-09-14 16:04:01,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19229 states to 19229 states and 29892 transitions. [2018-09-14 16:04:01,061 INFO L78 Accepts]: Start accepts. Automaton has 19229 states and 29892 transitions. Word has length 268 [2018-09-14 16:04:01,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:04:01,061 INFO L480 AbstractCegarLoop]: Abstraction has 19229 states and 29892 transitions. [2018-09-14 16:04:01,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:04:01,062 INFO L276 IsEmpty]: Start isEmpty. Operand 19229 states and 29892 transitions. [2018-09-14 16:04:01,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2018-09-14 16:04:01,164 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:04:01,165 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:04:01,165 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:04:01,165 INFO L82 PathProgramCache]: Analyzing trace with hash 2135564915, now seen corresponding path program 1 times [2018-09-14 16:04:01,165 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:04:01,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:01,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:01,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:01,167 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:04:01,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:01,475 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 16:04:01,736 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:04:01,736 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:04:01,737 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 16:04:01,737 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:04:01,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:04:01,737 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:04:01,738 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 16:04:01,738 INFO L87 Difference]: Start difference. First operand 19229 states and 29892 transitions. Second operand 6 states. [2018-09-14 16:04:06,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:04:06,499 INFO L93 Difference]: Finished difference Result 47038 states and 77704 transitions. [2018-09-14 16:04:06,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 16:04:06,499 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 289 [2018-09-14 16:04:06,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:04:06,654 INFO L225 Difference]: With dead ends: 47038 [2018-09-14 16:04:06,655 INFO L226 Difference]: Without dead ends: 27825 [2018-09-14 16:04:06,708 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-14 16:04:06,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27825 states. [2018-09-14 16:04:07,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27825 to 27486. [2018-09-14 16:04:07,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27486 states. [2018-09-14 16:04:07,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27486 states to 27486 states and 38146 transitions. [2018-09-14 16:04:07,520 INFO L78 Accepts]: Start accepts. Automaton has 27486 states and 38146 transitions. Word has length 289 [2018-09-14 16:04:07,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:04:07,521 INFO L480 AbstractCegarLoop]: Abstraction has 27486 states and 38146 transitions. [2018-09-14 16:04:07,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:04:07,521 INFO L276 IsEmpty]: Start isEmpty. Operand 27486 states and 38146 transitions. [2018-09-14 16:04:07,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2018-09-14 16:04:07,610 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:04:07,610 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:04:07,611 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:04:07,611 INFO L82 PathProgramCache]: Analyzing trace with hash -268886066, now seen corresponding path program 1 times [2018-09-14 16:04:07,611 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:04:07,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:07,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:07,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:07,613 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:04:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:08,200 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-09-14 16:04:08,559 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-09-14 16:04:09,458 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 100 proven. 92 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-14 16:04:09,458 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:04:09,459 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:04:09,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:09,478 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:04:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:09,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:04:10,225 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 100 proven. 4 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2018-09-14 16:04:10,225 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:04:10,521 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2018-09-14 16:04:10,543 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:04:10,544 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 5] total 14 [2018-09-14 16:04:10,544 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:04:10,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:04:10,545 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:04:10,545 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2018-09-14 16:04:10,545 INFO L87 Difference]: Start difference. First operand 27486 states and 38146 transitions. Second operand 5 states. [2018-09-14 16:04:13,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:04:13,246 INFO L93 Difference]: Finished difference Result 80531 states and 112695 transitions. [2018-09-14 16:04:13,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 16:04:13,247 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 309 [2018-09-14 16:04:13,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:04:13,465 INFO L225 Difference]: With dead ends: 80531 [2018-09-14 16:04:13,466 INFO L226 Difference]: Without dead ends: 53061 [2018-09-14 16:04:13,545 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 631 GetRequests, 610 SyntacticMatches, 8 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2018-09-14 16:04:13,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53061 states. [2018-09-14 16:04:14,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53061 to 51130. [2018-09-14 16:04:14,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51130 states. [2018-09-14 16:04:14,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51130 states to 51130 states and 69185 transitions. [2018-09-14 16:04:14,788 INFO L78 Accepts]: Start accepts. Automaton has 51130 states and 69185 transitions. Word has length 309 [2018-09-14 16:04:14,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:04:14,789 INFO L480 AbstractCegarLoop]: Abstraction has 51130 states and 69185 transitions. [2018-09-14 16:04:14,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:04:14,789 INFO L276 IsEmpty]: Start isEmpty. Operand 51130 states and 69185 transitions. [2018-09-14 16:04:14,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-09-14 16:04:14,885 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:04:14,886 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:04:14,886 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:04:14,886 INFO L82 PathProgramCache]: Analyzing trace with hash 2112084087, now seen corresponding path program 1 times [2018-09-14 16:04:14,886 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:04:14,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:14,887 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:14,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:14,888 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:04:14,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:15,442 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-14 16:04:15,709 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 132 proven. 34 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-14 16:04:15,710 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:04:15,710 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:04:15,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:15,725 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:04:15,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:15,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:04:17,270 WARN L178 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-09-14 16:04:17,372 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 151 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-14 16:04:17,373 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:04:17,637 WARN L178 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-09-14 16:04:18,166 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 117 proven. 64 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:04:18,187 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:04:18,188 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:04:18,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:18,203 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:04:18,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:18,697 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:04:20,068 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-14 16:04:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 151 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-14 16:04:20,129 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:04:20,543 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 117 proven. 64 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:04:20,546 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:04:20,546 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8, 8, 8] total 24 [2018-09-14 16:04:20,547 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:04:20,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-14 16:04:20,548 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-14 16:04:20,549 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2018-09-14 16:04:20,549 INFO L87 Difference]: Start difference. First operand 51130 states and 69185 transitions. Second operand 12 states. [2018-09-14 16:04:21,792 WARN L178 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-09-14 16:04:42,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:04:42,050 INFO L93 Difference]: Finished difference Result 181330 states and 288847 transitions. [2018-09-14 16:04:42,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-14 16:04:42,050 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 318 [2018-09-14 16:04:42,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:04:42,990 INFO L225 Difference]: With dead ends: 181330 [2018-09-14 16:04:42,991 INFO L226 Difference]: Without dead ends: 130214 [2018-09-14 16:04:43,793 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1446 GetRequests, 1337 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4211 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1645, Invalid=10565, Unknown=0, NotChecked=0, Total=12210 [2018-09-14 16:04:43,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130214 states. [2018-09-14 16:04:46,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130214 to 122137. [2018-09-14 16:04:46,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122137 states. [2018-09-14 16:04:46,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122137 states to 122137 states and 156401 transitions. [2018-09-14 16:04:46,963 INFO L78 Accepts]: Start accepts. Automaton has 122137 states and 156401 transitions. Word has length 318 [2018-09-14 16:04:46,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:04:46,964 INFO L480 AbstractCegarLoop]: Abstraction has 122137 states and 156401 transitions. [2018-09-14 16:04:46,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-14 16:04:46,964 INFO L276 IsEmpty]: Start isEmpty. Operand 122137 states and 156401 transitions. [2018-09-14 16:04:47,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2018-09-14 16:04:47,138 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:04:47,138 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:04:47,138 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:04:47,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1689599594, now seen corresponding path program 1 times [2018-09-14 16:04:47,139 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:04:47,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:47,140 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:47,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:47,140 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:04:47,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:47,676 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 148 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-14 16:04:47,677 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:04:47,677 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 [2018-09-14 16:04:48,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:48,558 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:04:48,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:48,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:04:48,949 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 103 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-09-14 16:04:48,949 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:04:49,682 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 148 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-14 16:04:49,704 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:04:49,704 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:04:49,721 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:49,721 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:04:50,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:50,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:04:50,419 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 84 proven. 21 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-09-14 16:04:50,420 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:04:50,771 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 148 proven. 37 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:04:50,773 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:04:50,774 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 8] total 12 [2018-09-14 16:04:50,774 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:04:50,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:04:50,775 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:04:50,775 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-09-14 16:04:50,777 INFO L87 Difference]: Start difference. First operand 122137 states and 156401 transitions. Second operand 6 states. [2018-09-14 16:04:52,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:04:52,765 INFO L93 Difference]: Finished difference Result 216304 states and 276168 transitions. [2018-09-14 16:04:52,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-14 16:04:52,765 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 336 [2018-09-14 16:04:52,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:04:53,144 INFO L225 Difference]: With dead ends: 216304 [2018-09-14 16:04:53,144 INFO L226 Difference]: Without dead ends: 114963 [2018-09-14 16:04:53,322 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1350 GetRequests, 1334 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2018-09-14 16:04:53,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114963 states. [2018-09-14 16:04:55,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114963 to 114680. [2018-09-14 16:04:55,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114680 states. [2018-09-14 16:04:56,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114680 states to 114680 states and 144377 transitions. [2018-09-14 16:04:56,227 INFO L78 Accepts]: Start accepts. Automaton has 114680 states and 144377 transitions. Word has length 336 [2018-09-14 16:04:56,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:04:56,228 INFO L480 AbstractCegarLoop]: Abstraction has 114680 states and 144377 transitions. [2018-09-14 16:04:56,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:04:56,228 INFO L276 IsEmpty]: Start isEmpty. Operand 114680 states and 144377 transitions. [2018-09-14 16:04:56,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2018-09-14 16:04:56,329 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:04:56,329 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:04:56,329 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:04:56,329 INFO L82 PathProgramCache]: Analyzing trace with hash 973085746, now seen corresponding path program 1 times [2018-09-14 16:04:56,329 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:04:56,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:56,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:56,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:56,331 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:04:56,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:56,927 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-14 16:04:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 190 proven. 70 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-09-14 16:04:57,155 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:04:57,156 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:04:57,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:57,164 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:04:57,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:57,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:04:57,588 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 228 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2018-09-14 16:04:57,589 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:04:57,936 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 190 proven. 70 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-09-14 16:04:57,957 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:04:57,957 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:04:57,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:57,975 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:04:58,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:58,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:04:59,117 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 258 proven. 44 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-14 16:04:59,118 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:04:59,562 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 215 proven. 100 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-14 16:04:59,565 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:04:59,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 11, 8] total 26 [2018-09-14 16:04:59,565 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:04:59,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-14 16:04:59,567 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-14 16:04:59,567 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2018-09-14 16:04:59,567 INFO L87 Difference]: Start difference. First operand 114680 states and 144377 transitions. Second operand 10 states. [2018-09-14 16:05:07,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:05:07,630 INFO L93 Difference]: Finished difference Result 219011 states and 288187 transitions. [2018-09-14 16:05:07,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-14 16:05:07,631 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 376 [2018-09-14 16:05:07,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:05:08,045 INFO L225 Difference]: With dead ends: 219011 [2018-09-14 16:05:08,046 INFO L226 Difference]: Without dead ends: 104965 [2018-09-14 16:05:08,310 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1536 GetRequests, 1498 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=249, Invalid=1311, Unknown=0, NotChecked=0, Total=1560 [2018-09-14 16:05:08,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104965 states. [2018-09-14 16:05:10,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104965 to 101667. [2018-09-14 16:05:10,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101667 states. [2018-09-14 16:05:11,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101667 states to 101667 states and 117483 transitions. [2018-09-14 16:05:11,075 INFO L78 Accepts]: Start accepts. Automaton has 101667 states and 117483 transitions. Word has length 376 [2018-09-14 16:05:11,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:05:11,075 INFO L480 AbstractCegarLoop]: Abstraction has 101667 states and 117483 transitions. [2018-09-14 16:05:11,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-14 16:05:11,075 INFO L276 IsEmpty]: Start isEmpty. Operand 101667 states and 117483 transitions. [2018-09-14 16:05:11,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2018-09-14 16:05:11,137 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:05:11,137 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:05:11,137 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:05:11,137 INFO L82 PathProgramCache]: Analyzing trace with hash 42904784, now seen corresponding path program 1 times [2018-09-14 16:05:11,138 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:05:11,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:11,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:11,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:11,139 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:05:11,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:11,364 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 175 proven. 8 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2018-09-14 16:05:11,365 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:05:11,365 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:05:11,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:11,374 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:05:11,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:11,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:05:11,721 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2018-09-14 16:05:11,722 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:05:12,552 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 163 proven. 75 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-09-14 16:05:12,574 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:05:12,575 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 11 [2018-09-14 16:05:12,575 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:05:12,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:05:12,576 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:05:12,576 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-09-14 16:05:12,576 INFO L87 Difference]: Start difference. First operand 101667 states and 117483 transitions. Second operand 6 states. [2018-09-14 16:05:15,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:05:15,461 INFO L93 Difference]: Finished difference Result 186471 states and 218144 transitions. [2018-09-14 16:05:15,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-14 16:05:15,462 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 378 [2018-09-14 16:05:15,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:05:15,767 INFO L225 Difference]: With dead ends: 186471 [2018-09-14 16:05:15,767 INFO L226 Difference]: Without dead ends: 103314 [2018-09-14 16:05:15,903 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 766 GetRequests, 748 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2018-09-14 16:05:15,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103314 states. [2018-09-14 16:05:17,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103314 to 102168. [2018-09-14 16:05:17,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102168 states. [2018-09-14 16:05:18,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102168 states to 102168 states and 117828 transitions. [2018-09-14 16:05:18,082 INFO L78 Accepts]: Start accepts. Automaton has 102168 states and 117828 transitions. Word has length 378 [2018-09-14 16:05:18,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:05:18,082 INFO L480 AbstractCegarLoop]: Abstraction has 102168 states and 117828 transitions. [2018-09-14 16:05:18,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:05:18,083 INFO L276 IsEmpty]: Start isEmpty. Operand 102168 states and 117828 transitions. [2018-09-14 16:05:18,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2018-09-14 16:05:18,151 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:05:18,151 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:05:18,151 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:05:18,151 INFO L82 PathProgramCache]: Analyzing trace with hash 528733795, now seen corresponding path program 1 times [2018-09-14 16:05:18,152 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:05:18,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:18,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:18,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:18,153 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:05:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:18,583 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 167 proven. 79 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-09-14 16:05:18,584 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:05:18,584 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:05:18,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:18,594 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:05:18,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:18,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:05:18,969 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2018-09-14 16:05:18,969 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:05:19,185 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 167 proven. 79 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-09-14 16:05:19,207 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:05:19,207 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-14 16:05:19,207 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:05:19,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:05:19,208 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:05:19,208 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-09-14 16:05:19,208 INFO L87 Difference]: Start difference. First operand 102168 states and 117828 transitions. Second operand 5 states. [2018-09-14 16:05:22,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:05:22,472 INFO L93 Difference]: Finished difference Result 197822 states and 228242 transitions. [2018-09-14 16:05:22,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 16:05:22,473 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 380 [2018-09-14 16:05:22,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:05:22,693 INFO L225 Difference]: With dead ends: 197822 [2018-09-14 16:05:22,693 INFO L226 Difference]: Without dead ends: 99912 [2018-09-14 16:05:22,784 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 767 GetRequests, 755 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-09-14 16:05:22,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99912 states. [2018-09-14 16:05:24,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99912 to 98387. [2018-09-14 16:05:24,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98387 states. [2018-09-14 16:05:24,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98387 states to 98387 states and 112433 transitions. [2018-09-14 16:05:24,273 INFO L78 Accepts]: Start accepts. Automaton has 98387 states and 112433 transitions. Word has length 380 [2018-09-14 16:05:24,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:05:24,274 INFO L480 AbstractCegarLoop]: Abstraction has 98387 states and 112433 transitions. [2018-09-14 16:05:24,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:05:24,274 INFO L276 IsEmpty]: Start isEmpty. Operand 98387 states and 112433 transitions. [2018-09-14 16:05:24,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2018-09-14 16:05:24,339 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:05:24,339 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:05:24,339 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:05:24,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1663644183, now seen corresponding path program 1 times [2018-09-14 16:05:24,339 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:05:24,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:24,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:24,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:24,341 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:05:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:24,822 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 265 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:05:24,822 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:05:24,822 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:05:24,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:24,831 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:05:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:27,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:05:27,859 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-09-14 16:05:27,859 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:05:27,965 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-09-14 16:05:27,989 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 16:05:27,989 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-14 16:05:27,989 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:05:27,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:05:27,990 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:05:27,990 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:05:27,990 INFO L87 Difference]: Start difference. First operand 98387 states and 112433 transitions. Second operand 3 states. [2018-09-14 16:05:29,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:05:29,856 INFO L93 Difference]: Finished difference Result 155487 states and 177956 transitions. [2018-09-14 16:05:29,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:05:29,857 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 388 [2018-09-14 16:05:29,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:05:30,008 INFO L225 Difference]: With dead ends: 155487 [2018-09-14 16:05:30,008 INFO L226 Difference]: Without dead ends: 74660 [2018-09-14 16:05:30,099 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 781 GetRequests, 776 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:05:30,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74660 states. [2018-09-14 16:05:30,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74660 to 74564. [2018-09-14 16:05:30,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74564 states. [2018-09-14 16:05:31,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74564 states to 74564 states and 84311 transitions. [2018-09-14 16:05:31,500 INFO L78 Accepts]: Start accepts. Automaton has 74564 states and 84311 transitions. Word has length 388 [2018-09-14 16:05:31,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:05:31,501 INFO L480 AbstractCegarLoop]: Abstraction has 74564 states and 84311 transitions. [2018-09-14 16:05:31,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:05:31,501 INFO L276 IsEmpty]: Start isEmpty. Operand 74564 states and 84311 transitions. [2018-09-14 16:05:31,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2018-09-14 16:05:31,584 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:05:31,585 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:05:31,585 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:05:31,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1445721117, now seen corresponding path program 1 times [2018-09-14 16:05:31,586 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:05:31,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:31,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:31,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:31,587 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:05:31,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:32,222 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 236 proven. 34 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-14 16:05:32,222 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:05:32,223 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:05:32,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:32,231 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:05:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:32,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:05:32,544 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 268 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-14 16:05:32,544 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:05:32,681 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 236 proven. 34 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-14 16:05:32,702 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:05:32,702 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:05:32,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:32,720 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:05:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:33,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:05:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 268 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-14 16:05:33,601 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:05:33,769 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 241 proven. 34 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-09-14 16:05:33,772 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:05:33,772 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 6, 7] total 16 [2018-09-14 16:05:33,772 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:05:33,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:05:33,774 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:05:33,774 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2018-09-14 16:05:33,775 INFO L87 Difference]: Start difference. First operand 74564 states and 84311 transitions. Second operand 6 states. [2018-09-14 16:05:37,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:05:37,133 INFO L93 Difference]: Finished difference Result 237901 states and 282863 transitions. [2018-09-14 16:05:37,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 16:05:37,134 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 407 [2018-09-14 16:05:37,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:05:37,570 INFO L225 Difference]: With dead ends: 237901 [2018-09-14 16:05:37,571 INFO L226 Difference]: Without dead ends: 172920 [2018-09-14 16:05:37,686 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1638 GetRequests, 1619 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2018-09-14 16:05:37,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172920 states. [2018-09-14 16:05:40,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172920 to 169290. [2018-09-14 16:05:40,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169290 states. [2018-09-14 16:05:40,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169290 states to 169290 states and 193444 transitions. [2018-09-14 16:05:40,823 INFO L78 Accepts]: Start accepts. Automaton has 169290 states and 193444 transitions. Word has length 407 [2018-09-14 16:05:40,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:05:40,824 INFO L480 AbstractCegarLoop]: Abstraction has 169290 states and 193444 transitions. [2018-09-14 16:05:40,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:05:40,824 INFO L276 IsEmpty]: Start isEmpty. Operand 169290 states and 193444 transitions. [2018-09-14 16:05:40,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2018-09-14 16:05:40,966 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:05:40,966 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:05:40,967 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:05:40,967 INFO L82 PathProgramCache]: Analyzing trace with hash -522676943, now seen corresponding path program 1 times [2018-09-14 16:05:40,967 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:05:40,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:40,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:40,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:40,968 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:05:41,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:41,462 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 289 proven. 70 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2018-09-14 16:05:41,463 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:05:41,463 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:05:41,472 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:41,472 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:05:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:41,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:05:42,071 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 436 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-09-14 16:05:42,071 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:05:43,064 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 335 proven. 100 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-09-14 16:05:43,085 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:05:43,085 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:05:43,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:43,100 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:05:43,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:43,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:05:44,872 WARN L178 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2018-09-14 16:05:45,219 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 192 proven. 2 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2018-09-14 16:05:45,219 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:05:46,767 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 238 proven. 122 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2018-09-14 16:05:46,770 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:05:46,770 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8, 10, 11] total 33 [2018-09-14 16:05:46,771 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:05:46,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-14 16:05:46,772 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-14 16:05:46,773 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2018-09-14 16:05:46,773 INFO L87 Difference]: Start difference. First operand 169290 states and 193444 transitions. Second operand 13 states. [2018-09-14 16:05:57,015 WARN L178 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-09-14 16:06:04,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:06:04,540 INFO L93 Difference]: Finished difference Result 343749 states and 432135 transitions. [2018-09-14 16:06:04,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-14 16:06:04,540 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 437 [2018-09-14 16:06:04,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:06:05,381 INFO L225 Difference]: With dead ends: 343749 [2018-09-14 16:06:05,381 INFO L226 Difference]: Without dead ends: 198356 [2018-09-14 16:06:05,658 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1852 GetRequests, 1764 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2398 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1169, Invalid=6841, Unknown=0, NotChecked=0, Total=8010 [2018-09-14 16:06:06,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198356 states. [2018-09-14 16:06:10,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198356 to 183048. [2018-09-14 16:06:10,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183048 states. [2018-09-14 16:06:10,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183048 states to 183048 states and 207840 transitions. [2018-09-14 16:06:10,593 INFO L78 Accepts]: Start accepts. Automaton has 183048 states and 207840 transitions. Word has length 437 [2018-09-14 16:06:10,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:06:10,593 INFO L480 AbstractCegarLoop]: Abstraction has 183048 states and 207840 transitions. [2018-09-14 16:06:10,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-14 16:06:10,593 INFO L276 IsEmpty]: Start isEmpty. Operand 183048 states and 207840 transitions. [2018-09-14 16:06:10,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2018-09-14 16:06:10,769 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:06:10,770 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:06:10,770 INFO L423 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:06:10,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1015664134, now seen corresponding path program 1 times [2018-09-14 16:06:10,770 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:06:10,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:10,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:10,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:10,771 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:06:10,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:11,168 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 272 proven. 133 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2018-09-14 16:06:11,168 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:06:11,168 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:06:11,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:11,178 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:06:11,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:11,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:06:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 481 proven. 4 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2018-09-14 16:06:11,601 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:06:11,802 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 402 proven. 66 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2018-09-14 16:06:11,825 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:06:11,825 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:06:11,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:11,840 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:06:13,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:13,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:06:13,265 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 481 proven. 4 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2018-09-14 16:06:13,266 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:06:13,462 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 402 proven. 66 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2018-09-14 16:06:13,465 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:06:13,466 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-09-14 16:06:13,466 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:06:13,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 16:06:13,467 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 16:06:13,467 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-09-14 16:06:13,467 INFO L87 Difference]: Start difference. First operand 183048 states and 207840 transitions. Second operand 9 states. [2018-09-14 16:06:19,352 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-09-14 16:06:36,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:06:36,766 INFO L93 Difference]: Finished difference Result 666569 states and 824946 transitions. [2018-09-14 16:06:36,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-14 16:06:36,766 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 454 [2018-09-14 16:06:36,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:06:38,425 INFO L225 Difference]: With dead ends: 666569 [2018-09-14 16:06:38,425 INFO L226 Difference]: Without dead ends: 447453 [2018-09-14 16:06:38,895 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1886 GetRequests, 1835 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=439, Invalid=2011, Unknown=0, NotChecked=0, Total=2450 [2018-09-14 16:06:39,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447453 states. [2018-09-14 16:06:53,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447453 to 415915. [2018-09-14 16:06:53,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415915 states. [2018-09-14 16:06:54,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415915 states to 415915 states and 458865 transitions. [2018-09-14 16:06:54,523 INFO L78 Accepts]: Start accepts. Automaton has 415915 states and 458865 transitions. Word has length 454 [2018-09-14 16:06:54,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:06:54,524 INFO L480 AbstractCegarLoop]: Abstraction has 415915 states and 458865 transitions. [2018-09-14 16:06:54,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 16:06:54,524 INFO L276 IsEmpty]: Start isEmpty. Operand 415915 states and 458865 transitions. [2018-09-14 16:06:54,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2018-09-14 16:06:54,945 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:06:54,945 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:06:54,945 INFO L423 AbstractCegarLoop]: === Iteration 18 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:06:54,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1776864303, now seen corresponding path program 1 times [2018-09-14 16:06:54,946 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:06:54,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:54,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:54,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:54,947 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:06:55,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:55,401 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 380 proven. 105 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-14 16:06:55,401 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:06:55,402 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:06:55,410 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:55,410 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:06:55,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:55,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:06:56,824 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 399 proven. 2 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-09-14 16:06:56,824 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:06:57,147 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 337 proven. 34 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2018-09-14 16:06:57,169 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:06:57,169 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:06:57,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:57,185 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:06:57,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:57,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:06:57,942 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 399 proven. 2 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-09-14 16:06:57,942 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:06:58,081 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 337 proven. 34 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2018-09-14 16:06:58,084 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:06:58,084 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5, 5, 5] total 17 [2018-09-14 16:06:58,084 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:06:58,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-14 16:06:58,086 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-14 16:06:58,086 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2018-09-14 16:06:58,086 INFO L87 Difference]: Start difference. First operand 415915 states and 458865 transitions. Second operand 13 states. Received shutdown request... [2018-09-14 16:06:58,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-14 16:06:58,497 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-14 16:06:58,503 WARN L206 ceAbstractionStarter]: Timeout [2018-09-14 16:06:58,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.09 04:06:58 BoogieIcfgContainer [2018-09-14 16:06:58,503 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-14 16:06:58,504 INFO L168 Benchmark]: Toolchain (without parser) took 211004.10 ms. Allocated memory was 1.5 GB in the beginning and 5.5 GB in the end (delta: 4.0 GB). Free memory was 1.4 GB in the beginning and 2.7 GB in the end (delta: -1.3 GB). Peak memory consumption was 2.7 GB. Max. memory is 7.1 GB. [2018-09-14 16:06:58,505 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-14 16:06:58,505 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1109.28 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 97.8 MB). Peak memory consumption was 97.8 MB. Max. memory is 7.1 GB. [2018-09-14 16:06:58,506 INFO L168 Benchmark]: Boogie Procedure Inliner took 160.62 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-09-14 16:06:58,507 INFO L168 Benchmark]: Boogie Preprocessor took 362.38 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 794.3 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -928.3 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. [2018-09-14 16:06:58,507 INFO L168 Benchmark]: RCFGBuilder took 4557.49 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 248.4 MB). Peak memory consumption was 248.4 MB. Max. memory is 7.1 GB. [2018-09-14 16:06:58,508 INFO L168 Benchmark]: TraceAbstraction took 204807.81 ms. Allocated memory was 2.3 GB in the beginning and 5.5 GB in the end (delta: 3.2 GB). Free memory was 2.0 GB in the beginning and 2.7 GB in the end (delta: -689.2 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-09-14 16:06:58,512 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 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 1109.28 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 97.8 MB). Peak memory consumption was 97.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 160.62 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 362.38 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 794.3 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -928.3 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4557.49 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 248.4 MB). Peak memory consumption was 248.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 204807.81 ms. Allocated memory was 2.3 GB in the beginning and 5.5 GB in the end (delta: 3.2 GB). Free memory was 2.0 GB in the beginning and 2.7 GB in the end (delta: -689.2 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1620]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1620). Cancelled while BasicCegarLoop was constructing difference of abstraction (415915states) and FLOYD_HOARE automaton (currently 10 states, 13 states before enhancement), while ReachableStatesComputation was computing reachable states (191 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 204.7s OverallTime, 18 OverallIterations, 6 TraceHistogramMax, 119.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4617 SDtfs, 24370 SDslu, 6129 SDs, 0 SdLazy, 45365 SolverSat, 9538 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 61.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16629 GetRequests, 16175 SyntacticMatches, 36 SemanticMatches, 418 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7994 ImplicationChecksByTransitivity, 20.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=415915occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 40.9s AutomataMinimizationTime, 17 MinimizatonAttempts, 67878 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 2.0s SsaConstructionTime, 10.3s SatisfiabilityAnalysisTime, 27.3s InterpolantComputationTime, 13986 NumberOfCodeBlocks, 13986 NumberOfCodeBlocksAsserted, 40 NumberOfCheckSat, 21987 ConstructedInterpolants, 0 QuantifiedInterpolants, 20010784 SizeOfPredicates, 101 NumberOfNonLiveVariables, 30440 ConjunctsInSsa, 347 ConjunctsInUnsatCore, 62 InterpolantComputations, 12 PerfectInterpolantSequences, 14958/16750 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label20_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-14_16-06-58-524.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label20_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-14_16-06-58-524.csv Completed graceful shutdown