java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/SifaC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --sifa.abstract.domain ExplicitValueDomain --rcfgbuilder.size.of.a.code.block SingleStatement --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.intern.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_DDA -i ../../../trunk/examples/svcomp/seq-mthreaded/pals_STARTPALS_ActiveStandby.1.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 19:44:00,515 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 19:44:00,516 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 19:44:00,528 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 19:44:00,528 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 19:44:00,529 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 19:44:00,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 19:44:00,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 19:44:00,534 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 19:44:00,535 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 19:44:00,536 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 19:44:00,537 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 19:44:00,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 19:44:00,538 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 19:44:00,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 19:44:00,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 19:44:00,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 19:44:00,542 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 19:44:00,544 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 19:44:00,546 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 19:44:00,548 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 19:44:00,549 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 19:44:00,550 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 19:44:00,550 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 19:44:00,553 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-20 19:44:00,553 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-20 19:44:00,553 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-20 19:44:00,554 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-20 19:44:00,555 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-20 19:44:00,558 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-20 19:44:00,558 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-20 19:44:00,559 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-20 19:44:00,561 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-20 19:44:00,562 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-20 19:44:00,563 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-20 19:44:00,563 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-20 19:44:00,566 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-20 19:44:00,566 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-20 19:44:00,567 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 19:44:00,568 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 19:44:00,570 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 19:44:00,571 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-20 19:44:00,589 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 19:44:00,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 19:44:00,590 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-20 19:44:00,591 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-20 19:44:00,591 INFO L138 SettingsManager]: * Use SBE=true [2019-09-20 19:44:00,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 19:44:00,591 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 19:44:00,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-20 19:44:00,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 19:44:00,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 19:44:00,592 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 19:44:00,593 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 19:44:00,593 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 19:44:00,594 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 19:44:00,594 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 19:44:00,594 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-20 19:44:00,594 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 19:44:00,594 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 19:44:00,595 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 19:44:00,595 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-20 19:44:00,595 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-20 19:44:00,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 19:44:00,596 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 19:44:00,596 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 19:44:00,596 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-20 19:44:00,596 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-20 19:44:00,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 19:44:00,597 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-20 19:44:00,597 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> ExplicitValueDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Intern Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_DDA [2019-09-20 19:44:00,638 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 19:44:00,649 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 19:44:00,653 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 19:44:00,654 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 19:44:00,655 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 19:44:00,656 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded/pals_STARTPALS_ActiveStandby.1.ufo.UNBOUNDED.pals.c [2019-09-20 19:44:00,716 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44e3d8c9f/e06266588ca743bcba65eb126b7eba9e/FLAGb2f06e5d8 [2019-09-20 19:44:01,248 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 19:44:01,249 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_STARTPALS_ActiveStandby.1.ufo.UNBOUNDED.pals.c [2019-09-20 19:44:01,270 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44e3d8c9f/e06266588ca743bcba65eb126b7eba9e/FLAGb2f06e5d8 [2019-09-20 19:44:01,520 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44e3d8c9f/e06266588ca743bcba65eb126b7eba9e [2019-09-20 19:44:01,529 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 19:44:01,531 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 19:44:01,531 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 19:44:01,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 19:44:01,535 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 19:44:01,536 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:44:01" (1/1) ... [2019-09-20 19:44:01,539 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5427eb53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:44:01, skipping insertion in model container [2019-09-20 19:44:01,539 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:44:01" (1/1) ... [2019-09-20 19:44:01,547 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 19:44:01,597 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 19:44:01,998 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 19:44:02,009 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 19:44:02,122 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 19:44:02,153 INFO L192 MainTranslator]: Completed translation [2019-09-20 19:44:02,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:44:02 WrapperNode [2019-09-20 19:44:02,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 19:44:02,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 19:44:02,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 19:44:02,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 19:44:02,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:44:02" (1/1) ... [2019-09-20 19:44:02,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:44:02" (1/1) ... [2019-09-20 19:44:02,189 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:44:02" (1/1) ... [2019-09-20 19:44:02,190 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:44:02" (1/1) ... [2019-09-20 19:44:02,208 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:44:02" (1/1) ... [2019-09-20 19:44:02,222 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:44:02" (1/1) ... [2019-09-20 19:44:02,226 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:44:02" (1/1) ... [2019-09-20 19:44:02,232 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 19:44:02,233 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 19:44:02,233 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 19:44:02,233 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 19:44:02,234 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:44:02" (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 [2019-09-20 19:44:02,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 19:44:02,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 19:44:02,288 INFO L138 BoogieDeclarations]: Found implementation of procedure write_side1_failed_history [2019-09-20 19:44:02,288 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2019-09-20 19:44:02,288 INFO L138 BoogieDeclarations]: Found implementation of procedure write_side2_failed_history [2019-09-20 19:44:02,289 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2019-09-20 19:44:02,289 INFO L138 BoogieDeclarations]: Found implementation of procedure write_active_side_history [2019-09-20 19:44:02,289 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2019-09-20 19:44:02,289 INFO L138 BoogieDeclarations]: Found implementation of procedure write_manual_selection_history [2019-09-20 19:44:02,289 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2019-09-20 19:44:02,289 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2019-09-20 19:44:02,290 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2019-09-20 19:44:02,290 INFO L138 BoogieDeclarations]: Found implementation of procedure Console_task_each_pals_period [2019-09-20 19:44:02,290 INFO L138 BoogieDeclarations]: Found implementation of procedure Side1_activestandby_task_each_pals_period [2019-09-20 19:44:02,290 INFO L138 BoogieDeclarations]: Found implementation of procedure Side2_activestandby_task_each_pals_period [2019-09-20 19:44:02,290 INFO L138 BoogieDeclarations]: Found implementation of procedure Pendulum_prism_task_each_pals_period [2019-09-20 19:44:02,290 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2019-09-20 19:44:02,291 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 19:44:02,291 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2019-09-20 19:44:02,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 19:44:02,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-09-20 19:44:02,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-09-20 19:44:02,292 INFO L130 BoogieDeclarations]: Found specification of procedure read [2019-09-20 19:44:02,292 INFO L130 BoogieDeclarations]: Found specification of procedure write [2019-09-20 19:44:02,292 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2019-09-20 19:44:02,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-20 19:44:02,292 INFO L130 BoogieDeclarations]: Found specification of procedure write_side1_failed_history [2019-09-20 19:44:02,292 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2019-09-20 19:44:02,293 INFO L130 BoogieDeclarations]: Found specification of procedure write_side2_failed_history [2019-09-20 19:44:02,293 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2019-09-20 19:44:02,293 INFO L130 BoogieDeclarations]: Found specification of procedure write_active_side_history [2019-09-20 19:44:02,293 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2019-09-20 19:44:02,293 INFO L130 BoogieDeclarations]: Found specification of procedure write_manual_selection_history [2019-09-20 19:44:02,293 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2019-09-20 19:44:02,294 INFO L130 BoogieDeclarations]: Found specification of procedure init [2019-09-20 19:44:02,294 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2019-09-20 19:44:02,294 INFO L130 BoogieDeclarations]: Found specification of procedure Console_task_each_pals_period [2019-09-20 19:44:02,294 INFO L130 BoogieDeclarations]: Found specification of procedure Side1_activestandby_task_each_pals_period [2019-09-20 19:44:02,294 INFO L130 BoogieDeclarations]: Found specification of procedure Side2_activestandby_task_each_pals_period [2019-09-20 19:44:02,294 INFO L130 BoogieDeclarations]: Found specification of procedure Pendulum_prism_task_each_pals_period [2019-09-20 19:44:02,295 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-09-20 19:44:02,295 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 19:44:02,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 19:44:02,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 19:44:03,461 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 19:44:03,461 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-20 19:44:03,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:44:03 BoogieIcfgContainer [2019-09-20 19:44:03,463 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 19:44:03,463 INFO L113 PluginConnector]: ------------------------Sifa---------------------------- [2019-09-20 19:44:03,463 INFO L271 PluginConnector]: Initializing Sifa... [2019-09-20 19:44:03,463 INFO L275 PluginConnector]: Sifa initialized [2019-09-20 19:44:03,465 INFO L185 PluginConnector]: Executing the observer SifaObserver from plugin Sifa for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:44:03" (1/1) ... [2019-09-20 19:44:03,465 INFO L79 SifaObserver]: Intern domains=ExplicitValueDomain;IntervalDomain ♦ Abstract Domain=ExplicitValueDomain ♦ Abstract when formula's dag size exceeds (negative numbers disable this limit)=-1 ♦ Fluid=SizeLimitFluid ♦ Max. Parallel Explicit Values=2 ♦ Max. Parallel Intervals=2 ♦ Loop Summarizer=FixpointLoopSummarizer ♦ Abstract when formula has more disjuncts than (negative numbers disable this limit)=8 ♦ Call Summarizer=TopInputCallSummarizer ♦ Xnf Conversion Technique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION ♦ Simplification Technique=SIMPLIFY_DDA ♦ Intern Fluid=SizeLimitFluid [2019-09-20 19:44:03,491 INFO L162 IcfgInterpreter]: Started Sifa with 1 locations of interest [2019-09-20 19:44:03,492 INFO L169 IcfgInterpreter]: Building call graph [2019-09-20 19:44:03,511 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-09-20 19:44:03,524 INFO L179 IcfgInterpreter]: Starting interpretation [2019-09-20 19:44:03,525 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-09-20 19:44:03,899 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2019-09-20 19:44:04,056 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2019-09-20 19:44:04,280 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2019-09-20 19:44:04,542 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2019-09-20 19:44:04,757 WARN L191 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2019-09-20 19:44:04,930 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2019-09-20 19:44:05,133 WARN L191 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2019-09-20 19:44:05,317 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2019-09-20 19:44:05,526 WARN L191 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2019-09-20 19:44:05,705 WARN L191 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2019-09-20 19:44:05,722 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 178 for LOIs [2019-09-20 19:44:06,253 WARN L191 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2019-09-20 19:44:07,460 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2019-09-20 19:44:07,855 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2019-09-20 19:44:07,999 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2019-09-20 19:44:08,494 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2019-09-20 19:44:08,677 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2019-09-20 19:44:09,961 WARN L191 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2019-09-20 19:44:10,158 WARN L191 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2019-09-20 19:44:10,365 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2019-09-20 19:44:10,520 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2019-09-20 19:44:10,759 WARN L191 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2019-09-20 19:44:10,943 WARN L191 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2019-09-20 19:44:12,437 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2019-09-20 19:44:12,590 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2019-09-20 19:44:13,299 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2019-09-20 19:44:13,519 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2019-09-20 19:44:13,706 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2019-09-20 19:44:13,893 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2019-09-20 19:44:14,084 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2019-09-20 19:44:14,226 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2019-09-20 19:44:14,369 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2019-09-20 19:44:14,539 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2019-09-20 19:44:15,305 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2019-09-20 19:44:15,487 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2019-09-20 19:44:16,083 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2019-09-20 19:44:16,401 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2019-09-20 19:44:16,631 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2019-09-20 19:44:16,831 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2019-09-20 19:44:17,072 WARN L191 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2019-09-20 19:44:17,452 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2019-09-20 19:44:17,651 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2019-09-20 19:44:17,890 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2019-09-20 19:44:18,031 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2019-09-20 19:44:18,791 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2019-09-20 19:44:18,963 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2019-09-20 19:44:19,170 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2019-09-20 19:44:19,307 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2019-09-20 19:44:20,027 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2019-09-20 19:44:20,222 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2019-09-20 19:44:20,435 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2019-09-20 19:44:20,571 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2019-09-20 19:44:20,882 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2019-09-20 19:44:21,086 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2019-09-20 19:44:21,271 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2019-09-20 19:44:21,490 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2019-09-20 19:44:22,058 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2019-09-20 19:44:22,236 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2019-09-20 19:44:22,446 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2019-09-20 19:44:22,592 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2019-09-20 19:44:23,132 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2019-09-20 19:44:23,311 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2019-09-20 19:44:23,494 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2019-09-20 19:44:23,699 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2019-09-20 19:44:24,067 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2019-09-20 19:44:24,289 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2019-09-20 19:44:24,440 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2019-09-20 19:44:25,014 WARN L191 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2019-09-20 19:44:25,361 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2019-09-20 19:44:26,382 WARN L191 SmtUtils]: Spent 702.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 168 [2019-09-20 19:44:26,714 WARN L191 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2019-09-20 19:44:26,795 INFO L199 IcfgInterpreter]: Interpreting procedure check with input of size 18 for LOIs [2019-09-20 19:44:27,074 WARN L191 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2019-09-20 19:44:27,183 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2019-09-20 19:44:27,451 WARN L191 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2019-09-20 19:44:27,559 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2019-09-20 19:44:27,807 WARN L191 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2019-09-20 19:44:27,918 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2019-09-20 19:44:28,158 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2019-09-20 19:44:28,267 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2019-09-20 19:44:28,509 WARN L191 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2019-09-20 19:44:28,618 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2019-09-20 19:44:28,875 WARN L191 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2019-09-20 19:44:28,986 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2019-09-20 19:44:29,226 WARN L191 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2019-09-20 19:44:29,336 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2019-09-20 19:44:29,599 WARN L191 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2019-09-20 19:44:29,709 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2019-09-20 19:44:29,947 WARN L191 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2019-09-20 19:44:30,052 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2019-09-20 19:44:30,296 WARN L191 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2019-09-20 19:44:30,408 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2019-09-20 19:44:30,650 WARN L191 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2019-09-20 19:44:30,753 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2019-09-20 19:44:31,028 WARN L191 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2019-09-20 19:44:31,320 WARN L191 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2019-09-20 19:44:31,610 WARN L191 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2019-09-20 19:44:31,925 WARN L191 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2019-09-20 19:44:32,213 WARN L191 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2019-09-20 19:44:32,499 WARN L191 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2019-09-20 19:44:32,795 WARN L191 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2019-09-20 19:44:33,082 WARN L191 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2019-09-20 19:44:33,362 WARN L191 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2019-09-20 19:44:33,645 WARN L191 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2019-09-20 19:44:33,943 WARN L191 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2019-09-20 19:44:34,198 WARN L191 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2019-09-20 19:44:34,538 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2019-09-20 19:44:34,702 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2019-09-20 19:44:34,906 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2019-09-20 19:44:35,107 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2019-09-20 19:44:35,310 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2019-09-20 19:44:35,510 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2019-09-20 19:44:35,714 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2019-09-20 19:44:35,918 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2019-09-20 19:44:36,118 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2019-09-20 19:44:36,316 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2019-09-20 19:44:36,531 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2019-09-20 19:44:36,752 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2019-09-20 19:44:36,938 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2019-09-20 19:44:37,126 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2019-09-20 19:44:37,324 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2019-09-20 19:44:37,522 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2019-09-20 19:44:37,724 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2019-09-20 19:44:37,925 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2019-09-20 19:44:38,125 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2019-09-20 19:44:38,329 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2019-09-20 19:44:38,532 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2019-09-20 19:44:38,736 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2019-09-20 19:44:38,958 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2019-09-20 19:44:39,164 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2019-09-20 19:44:39,373 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2019-09-20 19:44:39,571 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2019-09-20 19:44:39,773 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2019-09-20 19:44:39,971 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2019-09-20 19:44:40,170 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2019-09-20 19:44:40,373 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2019-09-20 19:44:40,573 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2019-09-20 19:44:40,829 WARN L191 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2019-09-20 19:44:41,065 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2019-09-20 19:44:41,416 WARN L191 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2019-09-20 19:44:41,546 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2019-09-20 19:44:41,878 WARN L191 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2019-09-20 19:44:42,177 WARN L191 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2019-09-20 19:44:42,316 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2019-09-20 19:44:42,512 WARN L191 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2019-09-20 19:44:42,784 WARN L191 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47