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_label51_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dace188-m [2018-09-14 16:06:51,503 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-14 16:06:51,506 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-14 16:06:51,518 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-14 16:06:51,518 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-14 16:06:51,519 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-14 16:06:51,521 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-14 16:06:51,523 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-14 16:06:51,524 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-14 16:06:51,525 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-14 16:06:51,526 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-14 16:06:51,526 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-14 16:06:51,527 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-14 16:06:51,528 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-14 16:06:51,530 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-14 16:06:51,530 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-14 16:06:51,531 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-14 16:06:51,533 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-14 16:06:51,535 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-14 16:06:51,537 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-14 16:06:51,538 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-14 16:06:51,539 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-14 16:06:51,542 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-14 16:06:51,542 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-14 16:06:51,542 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-14 16:06:51,543 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-14 16:06:51,545 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-14 16:06:51,545 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-14 16:06:51,546 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-14 16:06:51,547 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-14 16:06:51,548 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-14 16:06:51,549 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-14 16:06:51,549 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-14 16:06:51,549 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-14 16:06:51,550 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-14 16:06:51,551 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-14 16:06:51,551 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 16:06:51,567 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-14 16:06:51,568 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-14 16:06:51,568 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-14 16:06:51,569 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-14 16:06:51,569 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-14 16:06:51,569 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-14 16:06:51,569 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-14 16:06:51,570 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-14 16:06:51,570 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-14 16:06:51,570 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-14 16:06:51,570 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-14 16:06:51,571 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-14 16:06:51,571 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-14 16:06:51,571 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-14 16:06:51,571 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-14 16:06:51,572 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-14 16:06:51,572 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-14 16:06:51,572 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-14 16:06:51,572 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-14 16:06:51,572 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-14 16:06:51,572 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-14 16:06:51,573 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-14 16:06:51,573 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-14 16:06:51,573 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 16:06:51,573 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-14 16:06:51,574 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-14 16:06:51,574 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-14 16:06:51,574 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-14 16:06:51,574 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-14 16:06:51,574 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-14 16:06:51,574 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-14 16:06:51,575 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-14 16:06:51,575 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-14 16:06:51,619 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-14 16:06:51,632 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-14 16:06:51,636 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-14 16:06:51,638 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-14 16:06:51,638 INFO L276 PluginConnector]: CDTParser initialized [2018-09-14 16:06:51,639 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label51_true-unreach-call.c [2018-09-14 16:06:51,979 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd6380f8e/a61e2cbd0a464d1eaf159057aa8dc1c0/FLAGb1f8d25fa [2018-09-14 16:06:52,306 INFO L277 CDTParser]: Found 1 translation units. [2018-09-14 16:06:52,308 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label51_true-unreach-call.c [2018-09-14 16:06:52,331 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd6380f8e/a61e2cbd0a464d1eaf159057aa8dc1c0/FLAGb1f8d25fa [2018-09-14 16:06:52,354 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd6380f8e/a61e2cbd0a464d1eaf159057aa8dc1c0 [2018-09-14 16:06:52,368 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-14 16:06:52,374 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-14 16:06:52,376 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-14 16:06:52,376 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-14 16:06:52,388 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-14 16:06:52,390 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 04:06:52" (1/1) ... [2018-09-14 16:06:52,394 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77bb0608 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:06:52, skipping insertion in model container [2018-09-14 16:06:52,394 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 04:06:52" (1/1) ... [2018-09-14 16:06:52,406 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-14 16:06:53,217 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 16:06:53,238 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-14 16:06:53,489 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 16:06:53,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:06:53 WrapperNode [2018-09-14 16:06:53,563 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-14 16:06:53,564 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-14 16:06:53,564 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-14 16:06:53,564 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-14 16:06:53,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:06:53" (1/1) ... [2018-09-14 16:06:53,619 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:06:53" (1/1) ... [2018-09-14 16:06:53,716 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-14 16:06:53,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-14 16:06:53,717 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-14 16:06:53,717 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-14 16:06:53,962 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:06:53" (1/1) ... [2018-09-14 16:06:53,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:06:53" (1/1) ... [2018-09-14 16:06:53,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:06:53" (1/1) ... [2018-09-14 16:06:53,974 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:06:53" (1/1) ... [2018-09-14 16:06:54,021 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:06:53" (1/1) ... [2018-09-14 16:06:54,057 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:06:53" (1/1) ... [2018-09-14 16:06:54,068 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:06:53" (1/1) ... [2018-09-14 16:06:54,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-14 16:06:54,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-14 16:06:54,078 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-14 16:06:54,078 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-14 16:06:54,079 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:06:53" (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 16:06:54,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-14 16:06:54,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-14 16:06:54,147 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-14 16:06:54,148 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-14 16:06:54,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-14 16:06:54,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-14 16:06:54,148 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-14 16:06:54,148 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-14 16:06:59,365 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-14 16:06:59,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 04:06:59 BoogieIcfgContainer [2018-09-14 16:06:59,367 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-14 16:06:59,368 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-14 16:06:59,368 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-14 16:06:59,373 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-14 16:06:59,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 04:06:52" (1/3) ... [2018-09-14 16:06:59,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@321897dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 04:06:59, skipping insertion in model container [2018-09-14 16:06:59,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:06:53" (2/3) ... [2018-09-14 16:06:59,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@321897dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 04:06:59, skipping insertion in model container [2018-09-14 16:06:59,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 04:06:59" (3/3) ... [2018-09-14 16:06:59,378 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label51_true-unreach-call.c [2018-09-14 16:06:59,389 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-14 16:06:59,400 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-14 16:06:59,469 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-14 16:06:59,470 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-14 16:06:59,470 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-14 16:06:59,470 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-14 16:06:59,470 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-14 16:06:59,470 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-14 16:06:59,471 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-14 16:06:59,471 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-14 16:06:59,471 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-14 16:06:59,520 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-09-14 16:06:59,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-09-14 16:06:59,552 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:06:59,554 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] [2018-09-14 16:06:59,555 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:06:59,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1377037548, now seen corresponding path program 1 times [2018-09-14 16:06:59,565 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:06:59,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:59,629 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:59,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:59,629 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:06:59,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:00,813 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 16:07:00,816 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:07:00,817 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-14 16:07:00,817 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:07:00,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-14 16:07:00,840 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-14 16:07:00,841 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 16:07:00,844 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 4 states. [2018-09-14 16:07:04,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:07:04,174 INFO L93 Difference]: Finished difference Result 1077 states and 1927 transitions. [2018-09-14 16:07:04,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-14 16:07:04,176 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 195 [2018-09-14 16:07:04,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:07:04,211 INFO L225 Difference]: With dead ends: 1077 [2018-09-14 16:07:04,211 INFO L226 Difference]: Without dead ends: 759 [2018-09-14 16:07:04,220 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 16:07:04,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2018-09-14 16:07:04,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 519. [2018-09-14 16:07:04,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 519 states. [2018-09-14 16:07:04,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 918 transitions. [2018-09-14 16:07:04,316 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 918 transitions. Word has length 195 [2018-09-14 16:07:04,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:07:04,317 INFO L480 AbstractCegarLoop]: Abstraction has 519 states and 918 transitions. [2018-09-14 16:07:04,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-14 16:07:04,317 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 918 transitions. [2018-09-14 16:07:04,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-09-14 16:07:04,326 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:07:04,326 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:07:04,326 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:07:04,327 INFO L82 PathProgramCache]: Analyzing trace with hash 233310665, now seen corresponding path program 1 times [2018-09-14 16:07:04,327 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:07:04,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:04,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:04,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:04,329 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:07:04,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:04,693 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 16:07:05,055 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:07:05,056 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:07:05,056 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 16:07:05,056 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:07:05,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:07:05,058 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:07:05,058 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 16:07:05,059 INFO L87 Difference]: Start difference. First operand 519 states and 918 transitions. Second operand 6 states. [2018-09-14 16:07:08,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:07:08,466 INFO L93 Difference]: Finished difference Result 1480 states and 2698 transitions. [2018-09-14 16:07:08,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 16:07:08,468 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 223 [2018-09-14 16:07:08,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:07:08,482 INFO L225 Difference]: With dead ends: 1480 [2018-09-14 16:07:08,482 INFO L226 Difference]: Without dead ends: 967 [2018-09-14 16:07:08,485 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-14 16:07:08,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2018-09-14 16:07:08,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 949. [2018-09-14 16:07:08,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 949 states. [2018-09-14 16:07:08,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1579 transitions. [2018-09-14 16:07:08,575 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1579 transitions. Word has length 223 [2018-09-14 16:07:08,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:07:08,575 INFO L480 AbstractCegarLoop]: Abstraction has 949 states and 1579 transitions. [2018-09-14 16:07:08,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:07:08,576 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1579 transitions. [2018-09-14 16:07:08,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-09-14 16:07:08,582 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:07:08,582 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:07:08,583 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:07:08,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1168787131, now seen corresponding path program 1 times [2018-09-14 16:07:08,583 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:07:08,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:08,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:08,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:08,585 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:07:08,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:07:08,840 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:07:08,840 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 16:07:08,840 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:07:08,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:07:08,841 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:07:08,842 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 16:07:08,842 INFO L87 Difference]: Start difference. First operand 949 states and 1579 transitions. Second operand 6 states. [2018-09-14 16:07:11,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:07:11,763 INFO L93 Difference]: Finished difference Result 2923 states and 5085 transitions. [2018-09-14 16:07:11,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 16:07:11,764 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 230 [2018-09-14 16:07:11,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:07:11,782 INFO L225 Difference]: With dead ends: 2923 [2018-09-14 16:07:11,782 INFO L226 Difference]: Without dead ends: 1980 [2018-09-14 16:07:11,789 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-14 16:07:11,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2018-09-14 16:07:11,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1937. [2018-09-14 16:07:11,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1937 states. [2018-09-14 16:07:11,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 3132 transitions. [2018-09-14 16:07:11,896 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 3132 transitions. Word has length 230 [2018-09-14 16:07:11,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:07:11,898 INFO L480 AbstractCegarLoop]: Abstraction has 1937 states and 3132 transitions. [2018-09-14 16:07:11,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:07:11,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 3132 transitions. [2018-09-14 16:07:11,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-09-14 16:07:11,912 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:07:11,913 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:07:11,913 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:07:11,913 INFO L82 PathProgramCache]: Analyzing trace with hash 735234804, now seen corresponding path program 1 times [2018-09-14 16:07:11,914 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:07:11,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:11,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:11,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:11,915 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:07:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:07:12,435 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:07:12,435 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 16:07:12,435 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:07:12,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:07:12,436 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:07:12,436 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:07:12,437 INFO L87 Difference]: Start difference. First operand 1937 states and 3132 transitions. Second operand 3 states. [2018-09-14 16:07:14,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:07:14,567 INFO L93 Difference]: Finished difference Result 5678 states and 9481 transitions. [2018-09-14 16:07:14,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:07:14,568 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2018-09-14 16:07:14,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:07:14,593 INFO L225 Difference]: With dead ends: 5678 [2018-09-14 16:07:14,593 INFO L226 Difference]: Without dead ends: 3747 [2018-09-14 16:07:14,605 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 16:07:14,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3747 states. [2018-09-14 16:07:14,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3747 to 3742. [2018-09-14 16:07:14,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3742 states. [2018-09-14 16:07:14,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3742 states to 3742 states and 5849 transitions. [2018-09-14 16:07:14,723 INFO L78 Accepts]: Start accepts. Automaton has 3742 states and 5849 transitions. Word has length 241 [2018-09-14 16:07:14,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:07:14,724 INFO L480 AbstractCegarLoop]: Abstraction has 3742 states and 5849 transitions. [2018-09-14 16:07:14,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:07:14,724 INFO L276 IsEmpty]: Start isEmpty. Operand 3742 states and 5849 transitions. [2018-09-14 16:07:14,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-09-14 16:07:14,744 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:07:14,744 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-14 16:07:14,744 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:07:14,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1160092379, now seen corresponding path program 1 times [2018-09-14 16:07:14,745 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:07:14,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:14,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:14,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:14,746 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:07:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:15,000 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 16:07:15,389 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:07:15,389 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:07:15,389 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 16:07:15,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:15,415 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:07:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:15,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:07:16,033 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-09-14 16:07:16,033 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:07:16,257 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-14 16:07:16,602 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:07:16,625 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:07:16,625 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-09-14 16:07:16,625 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:07:16,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:07:16,626 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:07:16,626 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-09-14 16:07:16,627 INFO L87 Difference]: Start difference. First operand 3742 states and 5849 transitions. Second operand 5 states. [2018-09-14 16:07:19,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:07:19,051 INFO L93 Difference]: Finished difference Result 9638 states and 15649 transitions. [2018-09-14 16:07:19,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 16:07:19,051 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 248 [2018-09-14 16:07:19,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:07:19,090 INFO L225 Difference]: With dead ends: 9638 [2018-09-14 16:07:19,091 INFO L226 Difference]: Without dead ends: 5902 [2018-09-14 16:07:19,116 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 490 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2018-09-14 16:07:19,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5902 states. [2018-09-14 16:07:19,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5902 to 5719. [2018-09-14 16:07:19,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5719 states. [2018-09-14 16:07:19,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5719 states to 5719 states and 8242 transitions. [2018-09-14 16:07:19,339 INFO L78 Accepts]: Start accepts. Automaton has 5719 states and 8242 transitions. Word has length 248 [2018-09-14 16:07:19,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:07:19,339 INFO L480 AbstractCegarLoop]: Abstraction has 5719 states and 8242 transitions. [2018-09-14 16:07:19,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:07:19,340 INFO L276 IsEmpty]: Start isEmpty. Operand 5719 states and 8242 transitions. [2018-09-14 16:07:19,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2018-09-14 16:07:19,367 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:07:19,368 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:07:19,368 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:07:19,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1041536929, now seen corresponding path program 1 times [2018-09-14 16:07:19,369 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:07:19,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:19,370 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:19,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:19,370 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:07:19,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:19,982 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 71 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-09-14 16:07:19,983 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:07:19,983 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 16:07:19,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:19,999 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:07:20,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:20,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:07:20,322 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:07:20,323 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:07:20,634 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:07:20,668 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:07:20,669 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 4 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 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:07:20,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:20,695 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:07:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:21,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:07:21,607 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:07:21,608 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:07:22,192 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:07:22,195 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:07:22,195 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 15 [2018-09-14 16:07:22,199 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:07:22,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 16:07:22,205 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 16:07:22,206 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-09-14 16:07:22,207 INFO L87 Difference]: Start difference. First operand 5719 states and 8242 transitions. Second operand 9 states. [2018-09-14 16:07:26,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:07:26,654 INFO L93 Difference]: Finished difference Result 16978 states and 27759 transitions. [2018-09-14 16:07:26,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-14 16:07:26,655 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 261 [2018-09-14 16:07:26,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:07:26,742 INFO L225 Difference]: With dead ends: 16978 [2018-09-14 16:07:26,742 INFO L226 Difference]: Without dead ends: 11265 [2018-09-14 16:07:26,786 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1062 GetRequests, 1039 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2018-09-14 16:07:26,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11265 states. [2018-09-14 16:07:27,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11265 to 10189. [2018-09-14 16:07:27,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10189 states. [2018-09-14 16:07:27,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10189 states to 10189 states and 14199 transitions. [2018-09-14 16:07:27,251 INFO L78 Accepts]: Start accepts. Automaton has 10189 states and 14199 transitions. Word has length 261 [2018-09-14 16:07:27,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:07:27,252 INFO L480 AbstractCegarLoop]: Abstraction has 10189 states and 14199 transitions. [2018-09-14 16:07:27,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 16:07:27,252 INFO L276 IsEmpty]: Start isEmpty. Operand 10189 states and 14199 transitions. [2018-09-14 16:07:27,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-09-14 16:07:27,297 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:07:27,297 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-14 16:07:27,298 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:07:27,298 INFO L82 PathProgramCache]: Analyzing trace with hash -61853199, now seen corresponding path program 1 times [2018-09-14 16:07:27,298 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:07:27,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:27,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:27,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:27,300 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:07:27,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:27,874 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 114 proven. 34 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-09-14 16:07:27,875 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:07:27,875 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:07:27,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:27,884 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:07:28,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:28,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:07:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 114 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-09-14 16:07:28,200 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:07:28,663 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-09-14 16:07:28,685 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:07:28,686 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:07:28,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:28,704 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:07:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:29,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:07:29,321 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 114 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-09-14 16:07:29,321 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:07:29,532 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-09-14 16:07:29,535 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:07:29,535 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4, 4, 4] total 13 [2018-09-14 16:07:29,536 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:07:29,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-14 16:07:29,537 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-14 16:07:29,537 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2018-09-14 16:07:29,538 INFO L87 Difference]: Start difference. First operand 10189 states and 14199 transitions. Second operand 8 states. [2018-09-14 16:07:32,529 WARN L178 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-09-14 16:07:37,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:07:37,650 INFO L93 Difference]: Finished difference Result 27663 states and 47438 transitions. [2018-09-14 16:07:37,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-14 16:07:37,651 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 302 [2018-09-14 16:07:37,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:07:37,785 INFO L225 Difference]: With dead ends: 27663 [2018-09-14 16:07:37,785 INFO L226 Difference]: Without dead ends: 17480 [2018-09-14 16:07:37,862 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1263 GetRequests, 1223 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=308, Invalid=1174, Unknown=0, NotChecked=0, Total=1482 [2018-09-14 16:07:37,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17480 states. [2018-09-14 16:07:38,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17480 to 15171. [2018-09-14 16:07:38,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15171 states. [2018-09-14 16:07:38,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15171 states to 15171 states and 20488 transitions. [2018-09-14 16:07:38,537 INFO L78 Accepts]: Start accepts. Automaton has 15171 states and 20488 transitions. Word has length 302 [2018-09-14 16:07:38,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:07:38,538 INFO L480 AbstractCegarLoop]: Abstraction has 15171 states and 20488 transitions. [2018-09-14 16:07:38,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-14 16:07:38,538 INFO L276 IsEmpty]: Start isEmpty. Operand 15171 states and 20488 transitions. [2018-09-14 16:07:38,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-09-14 16:07:38,591 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:07:38,591 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 16:07:38,591 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:07:38,592 INFO L82 PathProgramCache]: Analyzing trace with hash 144350631, now seen corresponding path program 1 times [2018-09-14 16:07:38,592 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:07:38,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:38,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:38,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:38,593 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:07:38,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:39,294 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 138 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:07:39,295 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:07:39,295 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:07:39,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:39,311 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:07:39,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:39,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:07:40,067 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-14 16:07:40,068 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:07:40,386 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 105 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:07:40,407 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:07:40,408 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2018-09-14 16:07:40,408 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:07:40,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:07:40,408 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:07:40,409 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-09-14 16:07:40,409 INFO L87 Difference]: Start difference. First operand 15171 states and 20488 transitions. Second operand 6 states. [2018-09-14 16:07:42,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:07:42,434 INFO L93 Difference]: Finished difference Result 29345 states and 41004 transitions. [2018-09-14 16:07:42,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-14 16:07:42,435 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 308 [2018-09-14 16:07:42,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:07:42,513 INFO L225 Difference]: With dead ends: 29345 [2018-09-14 16:07:42,514 INFO L226 Difference]: Without dead ends: 15599 [2018-09-14 16:07:42,551 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 608 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2018-09-14 16:07:42,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15599 states. [2018-09-14 16:07:43,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15599 to 15281. [2018-09-14 16:07:43,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15281 states. [2018-09-14 16:07:43,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15281 states to 15281 states and 20541 transitions. [2018-09-14 16:07:43,059 INFO L78 Accepts]: Start accepts. Automaton has 15281 states and 20541 transitions. Word has length 308 [2018-09-14 16:07:43,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:07:43,060 INFO L480 AbstractCegarLoop]: Abstraction has 15281 states and 20541 transitions. [2018-09-14 16:07:43,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:07:43,060 INFO L276 IsEmpty]: Start isEmpty. Operand 15281 states and 20541 transitions. [2018-09-14 16:07:43,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-09-14 16:07:43,109 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:07:43,110 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 16:07:43,110 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:07:43,110 INFO L82 PathProgramCache]: Analyzing trace with hash -825276038, now seen corresponding path program 1 times [2018-09-14 16:07:43,111 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:07:43,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:43,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:43,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:43,112 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:07:43,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:43,902 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 109 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:07:43,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:07:43,902 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:07:43,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:43,917 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:07:44,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:44,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:07:44,594 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-14 16:07:44,594 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:07:44,908 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 109 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:07:44,931 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:07:44,932 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-14 16:07:44,932 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:07:44,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:07:44,932 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:07:44,932 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-09-14 16:07:44,933 INFO L87 Difference]: Start difference. First operand 15281 states and 20541 transitions. Second operand 5 states. [2018-09-14 16:07:47,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:07:47,284 INFO L93 Difference]: Finished difference Result 37234 states and 51290 transitions. [2018-09-14 16:07:47,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 16:07:47,285 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 310 [2018-09-14 16:07:47,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:07:47,372 INFO L225 Difference]: With dead ends: 37234 [2018-09-14 16:07:47,372 INFO L226 Difference]: Without dead ends: 22843 [2018-09-14 16:07:47,408 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 615 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-09-14 16:07:47,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22843 states. [2018-09-14 16:07:47,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22843 to 21877. [2018-09-14 16:07:47,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21877 states. [2018-09-14 16:07:47,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21877 states to 21877 states and 29481 transitions. [2018-09-14 16:07:47,979 INFO L78 Accepts]: Start accepts. Automaton has 21877 states and 29481 transitions. Word has length 310 [2018-09-14 16:07:47,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:07:47,980 INFO L480 AbstractCegarLoop]: Abstraction has 21877 states and 29481 transitions. [2018-09-14 16:07:47,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:07:47,980 INFO L276 IsEmpty]: Start isEmpty. Operand 21877 states and 29481 transitions. [2018-09-14 16:07:48,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2018-09-14 16:07:48,020 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:07:48,020 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 16:07:48,020 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:07:48,021 INFO L82 PathProgramCache]: Analyzing trace with hash 681995704, now seen corresponding path program 1 times [2018-09-14 16:07:48,021 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:07:48,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:48,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:48,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:48,022 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:07:48,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:48,824 WARN L178 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 12 [2018-09-14 16:07:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:07:49,361 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:07:49,361 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-14 16:07:49,362 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:07:49,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-14 16:07:49,362 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-14 16:07:49,363 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:07:49,363 INFO L87 Difference]: Start difference. First operand 21877 states and 29481 transitions. Second operand 7 states. [2018-09-14 16:07:51,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:07:51,788 INFO L93 Difference]: Finished difference Result 55109 states and 74401 transitions. [2018-09-14 16:07:51,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-14 16:07:51,789 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 330 [2018-09-14 16:07:51,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:07:51,961 INFO L225 Difference]: With dead ends: 55109 [2018-09-14 16:07:51,961 INFO L226 Difference]: Without dead ends: 34684 [2018-09-14 16:07:52,012 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2018-09-14 16:07:52,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34684 states. [2018-09-14 16:07:52,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34684 to 33877. [2018-09-14 16:07:52,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33877 states. [2018-09-14 16:07:52,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33877 states to 33877 states and 44016 transitions. [2018-09-14 16:07:52,936 INFO L78 Accepts]: Start accepts. Automaton has 33877 states and 44016 transitions. Word has length 330 [2018-09-14 16:07:52,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:07:52,937 INFO L480 AbstractCegarLoop]: Abstraction has 33877 states and 44016 transitions. [2018-09-14 16:07:52,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-14 16:07:52,937 INFO L276 IsEmpty]: Start isEmpty. Operand 33877 states and 44016 transitions. [2018-09-14 16:07:52,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-09-14 16:07:52,990 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:07:52,991 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 16:07:52,991 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:07:52,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1523706639, now seen corresponding path program 1 times [2018-09-14 16:07:52,991 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:07:52,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:52,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:52,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:52,993 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:07:53,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:53,308 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 129 proven. 28 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-09-14 16:07:53,308 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:07:53,308 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 16:07:53,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:53,318 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:07:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:53,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:07:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2018-09-14 16:07:53,650 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:07:53,771 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 129 proven. 28 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-09-14 16:07:53,793 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:07:53,794 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 11 [2018-09-14 16:07:53,794 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:07:53,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:07:53,795 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:07:53,795 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-09-14 16:07:53,795 INFO L87 Difference]: Start difference. First operand 33877 states and 44016 transitions. Second operand 5 states. [2018-09-14 16:07:56,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:07:56,279 INFO L93 Difference]: Finished difference Result 84802 states and 109373 transitions. [2018-09-14 16:07:56,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 16:07:56,280 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 338 [2018-09-14 16:07:56,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:07:56,769 INFO L225 Difference]: With dead ends: 84802 [2018-09-14 16:07:56,769 INFO L226 Difference]: Without dead ends: 52556 [2018-09-14 16:07:56,822 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 670 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2018-09-14 16:07:56,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52556 states. [2018-09-14 16:07:57,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52556 to 50910. [2018-09-14 16:07:57,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50910 states. [2018-09-14 16:07:58,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50910 states to 50910 states and 63906 transitions. [2018-09-14 16:07:58,016 INFO L78 Accepts]: Start accepts. Automaton has 50910 states and 63906 transitions. Word has length 338 [2018-09-14 16:07:58,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:07:58,016 INFO L480 AbstractCegarLoop]: Abstraction has 50910 states and 63906 transitions. [2018-09-14 16:07:58,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:07:58,016 INFO L276 IsEmpty]: Start isEmpty. Operand 50910 states and 63906 transitions. [2018-09-14 16:07:58,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2018-09-14 16:07:58,061 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:07:58,062 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 16:07:58,062 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:07:58,062 INFO L82 PathProgramCache]: Analyzing trace with hash 191731517, now seen corresponding path program 1 times [2018-09-14 16:07:58,062 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:07:58,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:58,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:58,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:58,063 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:07:58,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:58,410 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-09-14 16:07:58,847 WARN L178 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-09-14 16:07:58,982 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 185 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:07:58,983 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:07:58,983 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:07:58,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:58,991 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:07:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:59,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:07:59,874 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-09-14 16:07:59,874 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:08:00,154 WARN L178 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-09-14 16:08:00,367 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 38 [2018-09-14 16:08:00,424 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-09-14 16:08:00,657 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 140 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:08:00,680 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:08:00,681 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 12 [2018-09-14 16:08:00,681 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:08:00,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:08:00,681 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:08:00,682 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2018-09-14 16:08:00,682 INFO L87 Difference]: Start difference. First operand 50910 states and 63906 transitions. Second operand 5 states. [2018-09-14 16:08:03,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:08:03,264 INFO L93 Difference]: Finished difference Result 100555 states and 126103 transitions. [2018-09-14 16:08:03,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 16:08:03,264 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 341 [2018-09-14 16:08:03,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:08:03,417 INFO L225 Difference]: With dead ends: 100555 [2018-09-14 16:08:03,417 INFO L226 Difference]: Without dead ends: 51316 [2018-09-14 16:08:03,489 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 678 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2018-09-14 16:08:03,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51316 states. [2018-09-14 16:08:04,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51316 to 50911. [2018-09-14 16:08:04,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50911 states. [2018-09-14 16:08:04,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50911 states to 50911 states and 62673 transitions. [2018-09-14 16:08:04,590 INFO L78 Accepts]: Start accepts. Automaton has 50911 states and 62673 transitions. Word has length 341 [2018-09-14 16:08:04,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:08:04,590 INFO L480 AbstractCegarLoop]: Abstraction has 50911 states and 62673 transitions. [2018-09-14 16:08:04,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:08:04,590 INFO L276 IsEmpty]: Start isEmpty. Operand 50911 states and 62673 transitions. [2018-09-14 16:08:04,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2018-09-14 16:08:04,650 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:08:04,650 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 16:08:04,651 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:08:04,651 INFO L82 PathProgramCache]: Analyzing trace with hash 860820868, now seen corresponding path program 1 times [2018-09-14 16:08:04,651 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:08:04,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:08:04,652 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:08:04,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:08:04,653 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:08:04,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:08:05,306 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 148 proven. 8 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-14 16:08:05,307 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:08:05,307 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 16:08:05,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:08:05,324 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:08:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:08:05,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:08:06,085 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 181 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-14 16:08:06,085 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:08:06,674 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 181 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-14 16:08:06,697 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:08:06,697 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 16:08:06,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:08:06,713 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:08:07,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:08:07,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:08:07,372 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 181 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-14 16:08:07,372 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:08:07,633 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 181 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-14 16:08:07,636 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:08:07,637 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 14 [2018-09-14 16:08:07,637 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:08:07,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-14 16:08:07,638 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-14 16:08:07,638 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-09-14 16:08:07,638 INFO L87 Difference]: Start difference. First operand 50911 states and 62673 transitions. Second operand 8 states. [2018-09-14 16:08:17,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:08:17,130 INFO L93 Difference]: Finished difference Result 147014 states and 195319 transitions. [2018-09-14 16:08:17,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-14 16:08:17,131 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 342 [2018-09-14 16:08:17,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:08:17,502 INFO L225 Difference]: With dead ends: 147014 [2018-09-14 16:08:17,502 INFO L226 Difference]: Without dead ends: 96325 [2018-09-14 16:08:17,620 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1438 GetRequests, 1390 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=426, Invalid=1830, Unknown=0, NotChecked=0, Total=2256 [2018-09-14 16:08:17,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96325 states. [2018-09-14 16:08:20,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96325 to 92728. [2018-09-14 16:08:20,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92728 states. [2018-09-14 16:08:20,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92728 states to 92728 states and 111665 transitions. [2018-09-14 16:08:20,943 INFO L78 Accepts]: Start accepts. Automaton has 92728 states and 111665 transitions. Word has length 342 [2018-09-14 16:08:20,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:08:20,944 INFO L480 AbstractCegarLoop]: Abstraction has 92728 states and 111665 transitions. [2018-09-14 16:08:20,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-14 16:08:20,944 INFO L276 IsEmpty]: Start isEmpty. Operand 92728 states and 111665 transitions. [2018-09-14 16:08:21,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-09-14 16:08:21,033 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:08:21,033 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:08:21,034 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:08:21,034 INFO L82 PathProgramCache]: Analyzing trace with hash -784758727, now seen corresponding path program 1 times [2018-09-14 16:08:21,034 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:08:21,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:08:21,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:08:21,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:08:21,036 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:08:21,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:08:21,663 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-14 16:08:21,986 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 166 proven. 46 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-09-14 16:08:21,986 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:08:21,986 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 16:08:22,003 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:08:22,003 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:08:22,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:08:22,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:08:22,350 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2018-09-14 16:08:22,350 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:08:22,473 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 150 proven. 16 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-09-14 16:08:22,497 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:08:22,497 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-09-14 16:08:22,498 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:08:22,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:08:22,498 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:08:22,499 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-09-14 16:08:22,499 INFO L87 Difference]: Start difference. First operand 92728 states and 111665 transitions. Second operand 5 states. [2018-09-14 16:08:25,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:08:25,575 INFO L93 Difference]: Finished difference Result 167168 states and 204040 transitions. [2018-09-14 16:08:25,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 16:08:25,575 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 354 [2018-09-14 16:08:25,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:08:25,766 INFO L225 Difference]: With dead ends: 167168 [2018-09-14 16:08:25,767 INFO L226 Difference]: Without dead ends: 74838 [2018-09-14 16:08:25,901 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 716 GetRequests, 705 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-09-14 16:08:25,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74838 states. [2018-09-14 16:08:28,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74838 to 73570. [2018-09-14 16:08:28,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73570 states. [2018-09-14 16:08:28,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73570 states to 73570 states and 87033 transitions. [2018-09-14 16:08:28,478 INFO L78 Accepts]: Start accepts. Automaton has 73570 states and 87033 transitions. Word has length 354 [2018-09-14 16:08:28,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:08:28,479 INFO L480 AbstractCegarLoop]: Abstraction has 73570 states and 87033 transitions. [2018-09-14 16:08:28,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:08:28,479 INFO L276 IsEmpty]: Start isEmpty. Operand 73570 states and 87033 transitions. [2018-09-14 16:08:28,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-09-14 16:08:28,558 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:08:28,558 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:08:28,559 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:08:28,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1294549902, now seen corresponding path program 1 times [2018-09-14 16:08:28,559 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:08:28,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:08:28,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:08:28,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:08:28,560 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:08:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:08:28,921 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-09-14 16:08:29,081 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-09-14 16:08:29,285 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 229 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-09-14 16:08:29,285 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:08:29,285 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 16:08:29,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:08:29,295 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:08:29,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:08:29,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:08:29,789 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 203 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-09-14 16:08:29,789 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:08:30,075 WARN L178 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2018-09-14 16:08:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 184 proven. 46 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-14 16:08:30,716 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:08:30,717 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:08:30,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:08:30,734 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:08:31,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:08:31,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:08:31,501 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 203 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-09-14 16:08:31,501 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:08:31,787 WARN L178 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2018-09-14 16:08:33,116 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 165 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:08:33,119 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:08:33,119 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 8, 8] total 22 [2018-09-14 16:08:33,120 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:08:33,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-14 16:08:33,121 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-14 16:08:33,121 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2018-09-14 16:08:33,121 INFO L87 Difference]: Start difference. First operand 73570 states and 87033 transitions. Second operand 10 states. [2018-09-14 16:08:57,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:08:57,948 INFO L93 Difference]: Finished difference Result 208430 states and 312374 transitions. [2018-09-14 16:08:57,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-14 16:08:57,949 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 363 [2018-09-14 16:08:57,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:08:58,555 INFO L225 Difference]: With dead ends: 208430 [2018-09-14 16:08:58,555 INFO L226 Difference]: Without dead ends: 126640 [2018-09-14 16:08:58,757 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1595 GetRequests, 1498 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3166 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1433, Invalid=8269, Unknown=0, NotChecked=0, Total=9702 [2018-09-14 16:08:58,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126640 states. [2018-09-14 16:09:02,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126640 to 109977. [2018-09-14 16:09:02,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109977 states. [2018-09-14 16:09:02,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109977 states to 109977 states and 125242 transitions. [2018-09-14 16:09:02,411 INFO L78 Accepts]: Start accepts. Automaton has 109977 states and 125242 transitions. Word has length 363 [2018-09-14 16:09:02,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:09:02,411 INFO L480 AbstractCegarLoop]: Abstraction has 109977 states and 125242 transitions. [2018-09-14 16:09:02,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-14 16:09:02,412 INFO L276 IsEmpty]: Start isEmpty. Operand 109977 states and 125242 transitions. [2018-09-14 16:09:02,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2018-09-14 16:09:02,533 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:09:02,534 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 16:09:02,534 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:09:02,535 INFO L82 PathProgramCache]: Analyzing trace with hash -563277750, now seen corresponding path program 1 times [2018-09-14 16:09:02,535 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:09:02,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:09:02,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:09:02,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:09:02,536 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:09:02,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:09:03,035 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 228 proven. 34 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-14 16:09:03,035 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:09:03,036 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 16:09:03,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:09:03,049 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:09:03,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:09:03,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:09:03,490 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 214 proven. 30 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-09-14 16:09:03,490 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:09:03,638 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 242 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-09-14 16:09:03,661 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:09:03,661 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 16:09:03,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:09:03,677 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:09:04,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:09:04,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:09:04,377 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 176 proven. 74 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-09-14 16:09:04,377 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:09:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 246 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-09-14 16:09:05,060 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:09:05,061 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4, 4, 4] total 13 [2018-09-14 16:09:05,061 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:09:05,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-14 16:09:05,062 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-14 16:09:05,063 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-09-14 16:09:05,063 INFO L87 Difference]: Start difference. First operand 109977 states and 125242 transitions. Second operand 8 states. [2018-09-14 16:09:12,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:09:12,360 INFO L93 Difference]: Finished difference Result 197768 states and 234310 transitions. [2018-09-14 16:09:12,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-14 16:09:12,360 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 380 [2018-09-14 16:09:12,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:09:12,638 INFO L225 Difference]: With dead ends: 197768 [2018-09-14 16:09:12,639 INFO L226 Difference]: Without dead ends: 91182 [2018-09-14 16:09:12,766 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1563 GetRequests, 1529 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=235, Invalid=821, Unknown=0, NotChecked=0, Total=1056 [2018-09-14 16:09:12,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91182 states. [2018-09-14 16:09:14,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91182 to 83702. [2018-09-14 16:09:14,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83702 states. [2018-09-14 16:09:14,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83702 states to 83702 states and 92780 transitions. [2018-09-14 16:09:14,835 INFO L78 Accepts]: Start accepts. Automaton has 83702 states and 92780 transitions. Word has length 380 [2018-09-14 16:09:14,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:09:14,836 INFO L480 AbstractCegarLoop]: Abstraction has 83702 states and 92780 transitions. [2018-09-14 16:09:14,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-14 16:09:14,836 INFO L276 IsEmpty]: Start isEmpty. Operand 83702 states and 92780 transitions. [2018-09-14 16:09:14,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2018-09-14 16:09:14,887 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:09:14,887 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 16:09:14,887 INFO L423 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:09:14,887 INFO L82 PathProgramCache]: Analyzing trace with hash 640422368, now seen corresponding path program 1 times [2018-09-14 16:09:14,887 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:09:14,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:09:14,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:09:14,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:09:14,888 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:09:14,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:09:15,253 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-09-14 16:09:16,041 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 182 proven. 60 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:09:16,041 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:09:16,041 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 16:09:16,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:09:16,049 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:09:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:09:16,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:09:16,452 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-09-14 16:09:16,453 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:09:16,726 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 184 proven. 49 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-09-14 16:09:16,748 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:09:16,749 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 5] total 14 [2018-09-14 16:09:16,749 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:09:16,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:09:16,749 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:09:16,749 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2018-09-14 16:09:16,750 INFO L87 Difference]: Start difference. First operand 83702 states and 92780 transitions. Second operand 5 states. [2018-09-14 16:09:19,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:09:19,491 INFO L93 Difference]: Finished difference Result 195723 states and 219432 transitions. [2018-09-14 16:09:19,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 16:09:19,491 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 382 [2018-09-14 16:09:19,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:09:19,800 INFO L225 Difference]: With dead ends: 195723 [2018-09-14 16:09:19,801 INFO L226 Difference]: Without dead ends: 116904 [2018-09-14 16:09:19,883 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 756 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2018-09-14 16:09:19,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116904 states. [2018-09-14 16:09:21,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116904 to 114202. [2018-09-14 16:09:21,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114202 states. [2018-09-14 16:09:21,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114202 states to 114202 states and 125666 transitions. [2018-09-14 16:09:21,917 INFO L78 Accepts]: Start accepts. Automaton has 114202 states and 125666 transitions. Word has length 382 [2018-09-14 16:09:21,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:09:21,917 INFO L480 AbstractCegarLoop]: Abstraction has 114202 states and 125666 transitions. [2018-09-14 16:09:21,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:09:21,918 INFO L276 IsEmpty]: Start isEmpty. Operand 114202 states and 125666 transitions. [2018-09-14 16:09:21,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2018-09-14 16:09:21,962 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:09:21,962 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 16:09:21,962 INFO L423 AbstractCegarLoop]: === Iteration 18 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:09:21,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1466499758, now seen corresponding path program 1 times [2018-09-14 16:09:21,963 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:09:21,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:09:21,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:09:21,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:09:21,963 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:09:22,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:09:22,556 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 258 proven. 34 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-14 16:09:22,556 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:09:22,556 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:09:22,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:09:22,566 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:09:23,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:09:23,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:09:23,670 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 290 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-14 16:09:23,670 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:09:24,120 WARN L178 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2018-09-14 16:09:24,245 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2018-09-14 16:09:24,492 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 258 proven. 34 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-14 16:09:24,515 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:09:24,515 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 20 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 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:09:24,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:09:24,531 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:09:25,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:09:25,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:09:25,345 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 290 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-14 16:09:25,346 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:09:25,816 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 258 proven. 34 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-14 16:09:25,819 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:09:25,819 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 14 [2018-09-14 16:09:25,819 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:09:25,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 16:09:25,820 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 16:09:25,821 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2018-09-14 16:09:25,821 INFO L87 Difference]: Start difference. First operand 114202 states and 125666 transitions. Second operand 9 states. [2018-09-14 16:09:39,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:09:39,245 INFO L93 Difference]: Finished difference Result 233721 states and 274898 transitions. [2018-09-14 16:09:39,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-14 16:09:39,245 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 395 [2018-09-14 16:09:39,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:09:39,724 INFO L225 Difference]: With dead ends: 233721 [2018-09-14 16:09:39,724 INFO L226 Difference]: Without dead ends: 122984 [2018-09-14 16:09:39,902 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1660 GetRequests, 1609 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=478, Invalid=2174, Unknown=0, NotChecked=0, Total=2652 [2018-09-14 16:09:39,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122984 states. [2018-09-14 16:09:42,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122984 to 111518. [2018-09-14 16:09:42,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111518 states. [2018-09-14 16:09:42,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111518 states to 111518 states and 121780 transitions. [2018-09-14 16:09:42,905 INFO L78 Accepts]: Start accepts. Automaton has 111518 states and 121780 transitions. Word has length 395 [2018-09-14 16:09:42,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:09:42,906 INFO L480 AbstractCegarLoop]: Abstraction has 111518 states and 121780 transitions. [2018-09-14 16:09:42,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 16:09:42,906 INFO L276 IsEmpty]: Start isEmpty. Operand 111518 states and 121780 transitions. [2018-09-14 16:09:42,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2018-09-14 16:09:42,973 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:09:42,973 INFO L376 BasicCegarLoop]: trace histogram [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, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 16:09:42,973 INFO L423 AbstractCegarLoop]: === Iteration 19 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:09:42,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1924281348, now seen corresponding path program 1 times [2018-09-14 16:09:42,974 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:09:42,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:09:42,975 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:09:42,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:09:42,975 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:09:43,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:09:43,397 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 331 proven. 59 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2018-09-14 16:09:43,397 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:09:43,397 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:09:43,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:09:43,405 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:09:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:09:43,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:09:43,832 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 404 proven. 4 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-09-14 16:09:43,833 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:09:44,596 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 333 proven. 47 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-09-14 16:09:44,620 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:09:44,620 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 22 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 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:09:44,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:09:44,639 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:09:45,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:09:45,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:09:45,564 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 404 proven. 4 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-09-14 16:09:45,564 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:09:45,814 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 333 proven. 47 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-09-14 16:09:45,819 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:09:45,819 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 8 [2018-09-14 16:09:45,819 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:09:45,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-14 16:09:45,820 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-14 16:09:45,820 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-09-14 16:09:45,821 INFO L87 Difference]: Start difference. First operand 111518 states and 121780 transitions. Second operand 7 states. [2018-09-14 16:09:52,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:09:52,207 INFO L93 Difference]: Finished difference Result 323229 states and 363834 transitions. [2018-09-14 16:09:52,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 16:09:52,207 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 425 [2018-09-14 16:09:52,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:09:52,843 INFO L225 Difference]: With dead ends: 323229 [2018-09-14 16:09:52,843 INFO L226 Difference]: Without dead ends: 224142 [2018-09-14 16:09:52,983 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1710 GetRequests, 1692 SyntacticMatches, 10 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-09-14 16:09:53,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224142 states. [2018-09-14 16:09:57,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224142 to 217926. [2018-09-14 16:09:57,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217926 states. [2018-09-14 16:09:57,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217926 states to 217926 states and 239125 transitions. [2018-09-14 16:09:57,995 INFO L78 Accepts]: Start accepts. Automaton has 217926 states and 239125 transitions. Word has length 425 [2018-09-14 16:09:57,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:09:57,995 INFO L480 AbstractCegarLoop]: Abstraction has 217926 states and 239125 transitions. [2018-09-14 16:09:57,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-14 16:09:57,995 INFO L276 IsEmpty]: Start isEmpty. Operand 217926 states and 239125 transitions. [2018-09-14 16:09:58,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2018-09-14 16:09:58,126 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:09:58,126 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 16:09:58,127 INFO L423 AbstractCegarLoop]: === Iteration 20 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:09:58,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1232524515, now seen corresponding path program 1 times [2018-09-14 16:09:58,127 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:09:58,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:09:58,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:09:58,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:09:58,128 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:09:58,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:09:58,839 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 385 proven. 37 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-09-14 16:09:58,839 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:09:58,839 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:09:58,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:09:58,847 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:09:59,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:09:59,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:09:59,961 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2018-09-14 16:09:59,961 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:10:00,468 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 219 proven. 84 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2018-09-14 16:10:00,490 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:10:00,491 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 5] total 15 [2018-09-14 16:10:00,491 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:10:00,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:10:00,492 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:10:00,492 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2018-09-14 16:10:00,492 INFO L87 Difference]: Start difference. First operand 217926 states and 239125 transitions. Second operand 5 states. [2018-09-14 16:10:07,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:10:07,793 INFO L93 Difference]: Finished difference Result 504987 states and 549685 transitions. [2018-09-14 16:10:07,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 16:10:07,794 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 426 [2018-09-14 16:10:07,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:10:08,457 INFO L225 Difference]: With dead ends: 504987 [2018-09-14 16:10:08,457 INFO L226 Difference]: Without dead ends: 300415 [2018-09-14 16:10:08,613 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 864 GetRequests, 846 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2018-09-14 16:10:08,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300415 states. [2018-09-14 16:10:13,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300415 to 298541. [2018-09-14 16:10:13,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298541 states. [2018-09-14 16:10:14,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298541 states to 298541 states and 324094 transitions. [2018-09-14 16:10:14,456 INFO L78 Accepts]: Start accepts. Automaton has 298541 states and 324094 transitions. Word has length 426 [2018-09-14 16:10:14,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:10:14,456 INFO L480 AbstractCegarLoop]: Abstraction has 298541 states and 324094 transitions. [2018-09-14 16:10:14,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:10:14,456 INFO L276 IsEmpty]: Start isEmpty. Operand 298541 states and 324094 transitions. [2018-09-14 16:10:15,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2018-09-14 16:10:15,524 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:10:15,524 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:10:15,524 INFO L423 AbstractCegarLoop]: === Iteration 21 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:10:15,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1350115274, now seen corresponding path program 1 times [2018-09-14 16:10:15,525 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:10:15,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:10:15,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:10:15,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:10:15,526 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:10:15,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:10:15,875 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 255 proven. 4 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2018-09-14 16:10:15,876 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:10:15,876 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:10:15,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:10:15,885 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:10:16,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:10:16,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:10:16,328 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2018-09-14 16:10:16,329 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:10:16,535 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 255 proven. 4 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2018-09-14 16:10:16,558 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:10:16,558 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 4 [2018-09-14 16:10:16,558 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:10:16,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:10:16,559 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:10:16,559 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-14 16:10:16,559 INFO L87 Difference]: Start difference. First operand 298541 states and 324094 transitions. Second operand 3 states. [2018-09-14 16:10:22,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:10:22,119 INFO L93 Difference]: Finished difference Result 577784 states and 626980 transitions. [2018-09-14 16:10:22,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:10:22,119 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 441 [2018-09-14 16:10:22,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:10:22,760 INFO L225 Difference]: With dead ends: 577784 [2018-09-14 16:10:22,760 INFO L226 Difference]: Without dead ends: 298490 [2018-09-14 16:10:23,011 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 885 GetRequests, 883 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-14 16:10:23,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298490 states. Received shutdown request... [2018-09-14 16:10:35,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298490 to 298484. [2018-09-14 16:10:35,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298484 states. [2018-09-14 16:10:35,244 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-14 16:10:35,249 WARN L206 ceAbstractionStarter]: Timeout [2018-09-14 16:10:35,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.09 04:10:35 BoogieIcfgContainer [2018-09-14 16:10:35,250 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-14 16:10:35,251 INFO L168 Benchmark]: Toolchain (without parser) took 222881.33 ms. Allocated memory was 1.5 GB in the beginning and 5.4 GB in the end (delta: 3.9 GB). Free memory was 1.4 GB in the beginning and 3.3 GB in the end (delta: -1.9 GB). Peak memory consumption was 4.2 GB. Max. memory is 7.1 GB. [2018-09-14 16:10:35,252 INFO L168 Benchmark]: CDTParser took 0.19 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 16:10:35,252 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1187.77 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. [2018-09-14 16:10:35,253 INFO L168 Benchmark]: Boogie Procedure Inliner took 151.98 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 16:10:35,253 INFO L168 Benchmark]: Boogie Preprocessor took 361.29 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 814.7 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -958.2 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. [2018-09-14 16:10:35,254 INFO L168 Benchmark]: RCFGBuilder took 5289.04 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 257.0 MB). Peak memory consumption was 257.0 MB. Max. memory is 7.1 GB. [2018-09-14 16:10:35,254 INFO L168 Benchmark]: TraceAbstraction took 215881.87 ms. Allocated memory was 2.4 GB in the beginning and 5.4 GB in the end (delta: 3.1 GB). Free memory was 2.0 GB in the beginning and 3.3 GB in the end (delta: -1.3 GB). Peak memory consumption was 4.0 GB. Max. memory is 7.1 GB. [2018-09-14 16:10:35,258 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 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 1187.77 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 151.98 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 361.29 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 814.7 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -958.2 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5289.04 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 257.0 MB). Peak memory consumption was 257.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 215881.87 ms. Allocated memory was 2.4 GB in the beginning and 5.4 GB in the end (delta: 3.1 GB). Free memory was 2.0 GB in the beginning and 3.3 GB in the end (delta: -1.3 GB). Peak memory consumption was 4.0 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1599]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1599). Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 215.7s OverallTime, 21 OverallIterations, 6 TraceHistogramMax, 126.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4632 SDtfs, 27355 SDslu, 7670 SDs, 0 SdLazy, 47598 SolverSat, 8814 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 63.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16710 GetRequests, 16244 SyntacticMatches, 44 SemanticMatches, 422 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5303 ImplicationChecksByTransitivity, 20.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=298541occurred in iteration=20, 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: 45.7s AutomataMinimizationTime, 21 MinimizatonAttempts, 59282 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.6s SsaConstructionTime, 8.0s SatisfiabilityAnalysisTime, 29.0s InterpolantComputationTime, 14919 NumberOfCodeBlocks, 14919 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 22936 ConstructedInterpolants, 0 QuantifiedInterpolants, 22269935 SizeOfPredicates, 74 NumberOfNonLiveVariables, 31014 ConjunctsInSsa, 222 ConjunctsInUnsatCore, 67 InterpolantComputations, 14 PerfectInterpolantSequences, 14420/15635 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_label51_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-14_16-10-35-271.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label51_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-14_16-10-35-271.csv Completed graceful shutdown